MAX17014ETM+ ,Low-Cost Multiple-Output Power Supply for LCD TVsApplicationsMAX17014ETM+ -40°C to +85°C7mm x 7mmLCD TV Panels+Denotes a lead(Pb)-free/RoHS-complian ..
MAX17015AETP+ ,1.2MHz Low-Cost, High-Performance ChargersApplications Ordering InformationNotebook ComputersPART TEMP RANGE PIN-PACKAGETablet PCs MAX17005AE ..
MAX17015EVKIT+ ,Evaluation Kit for the MAX17015Bfeatures S Up to 1.2MHz Switching Frequencythe MAX17015B highly integrated, multichemistry bat-S Pr ..
MAX17016ETL+ ,Single Quick-PWM Step-Down Controller with Internal 26V MOSFETsElectrical Characteristics(Circuit of Figure 1, V = 12V, V = V = V = 5V, REFIN = ILIM = REF, SKIP = ..
MAX17016ETL+T ,Single Quick-PWM Step-Down Controller with Internal 26V MOSFETsapplications that need lower current-limit • Thermal Compensation with NTCsettings to avoid overdes ..
MAX17017GTM+ ,Quad-Output Controller for Low-Power ArchitectureApplicationsONA 39 22 AGND1-to-4 Li+ Cell Battery-Powered Devices INBC 40 21 REFINBC 41 20 FREQLow- ..
MAX4516EUK+T ,Dual-Supply, Low On-Resistance, SPST, CMOS Analog SwitchesGeneral Description ________
MAX4517CPA ,Dual-Supply / Low-On-Resistance / SPST / CMOS Analog SwitchesApplications ' Fast Switching Speed: t = 100ns, t = 75nsON OFFBattery-Operated Equipment ' t > t a ..
MAX4517CSA ,Dual-Supply / Low-On-Resistance / SPST / CMOS Analog SwitchesFeaturesThe MAX4516/MAX4517 are single-pole/single-throw' Available in SOT23-5 Package(SPST), CMOS, ..
MAX4517EUK ,Dual-Supply / Low-On-Resistance / SPST / CMOS Analog SwitchesELECTRICAL CHARACTERISTICS—±5V Supply(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, V = 3.5V, V = 1.5V, ..
MAX4517EUK+T ,Dual-Supply, Low On-Resistance, SPST, CMOS Analog SwitchesApplications ♦ Fast Switching Speed: t = 100ns, t = 75nsON OFFBattery-Operated Equipment ♦ t > t a ..
MAX4518CEE ,Precision, 4-Channel/Dual 2-Channel, Low-Voltage, CMOS Analog MultiplexersELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, GND = 0V, V = V ..
MAX17014ETM+
Low-Cost Multiple-Output Power Supply for LCD TVs
General DescriptionThe MAX17014 multiple-output power-supply controller
generates all the supply rails for thin-film transistor
(TFT) liquid-crystal display (LCD) panels in TVs and
monitors operating from a regulated 12V input. It
includes a step-down and a step-up regulator, a posi-
tive and a negative charge pump, two operational
amplifiers, and a Dual Mode™ logic-controlled high-
voltage switch control block. The MAX17014 can oper-
ate from 8V to 16.5V input voltages and is optimized for
LCD TV panel and LCD monitor applications running
directly from 12V supplies.
The step-up and step-down regulators feature internal
power MOSFETs and high-frequency operation allow-
ing the use of small inductors and capacitors, resulting
in a compact solution. Both switching regulators use
fixed-frequency current-mode control architectures,
providing fast load-transient response and easy com-
pensation. A current-limit function for internal switches
and output-fault shutdown protect the step-up and
step-down power supplies against fault conditions. The
MAX17014 provides soft-start functions to limit inrush
current during startup. The MAX17014 provides
adjustable power-up timing.
The positive and negative charge-pump regulators pro-
vide TFT gate driver supply voltages. Both output volt-
ages can be adjusted with external resistive
voltage-dividers. The switch control block allows the
manipulation of the positive TFT gate driver voltage.
The MAX17014 includes two high-current operational
amplifiers designed to drive the LCD backplane
(VCOM). The amplifier features high output current
(±150mA), fast slew rate (100V/µs), wide bandwidth
(20MHz), and rail-to-rail inputs and outputs. A series
p-channel MOSFET is integrated to sequence power to
AVDDafter the MAX17014 has proceeded through
normal startup, and provides True Shutdown™.
The MAX17014 is available in a small (7mm x 7mm),
low-profile (0.8mm), 48-pin thin QFN package and
operates over a -40°C to +85°C temperature range.
ApplicationsLCD TV Panels
LCD Monitor Panels
FeaturesOptimized for 10.8V to 13.2V Input Supply8V to 16.5V Input Supply RangeSelectable Frequency (600kHz/1.2MHz)Current-Mode Step-Up Regulator
Built-In 20V, 3.3A, 110mΩn-Channel MOSFET
High-Accuracy Output Voltage (1%)
True Shutdown
Fast Load-Transient Response
High Efficiency
3ms Internal Soft-StartCurrent-Mode Step-Down Regulator
Built-In 20V, 2.5A, 120mΩn-Channel MOSFET
Fast Load-Transient Response
Adjustable Output Voltage Down to 1.25V
Skip Mode at Light Load
High Efficiency
3ms Internal Soft-StartAdjustable Positive and Negative Charge-Pump
RegulatorsSoft-Start and Timer-Delay Fault Latch for All
OutputsLogic-Controlled High-Voltage Integrated
Switches with Adjustable DelayTwo High-Speed Operational Amplifiers
±150mA Short-Circuit Current
100V/µs Slew Rate
20MHz, -3dB Bandwidth120mΩp-Channel FET for AVDDSequencingInput Undervoltage Lockout and Thermal-
Overload Protection48-Pin, 7mm x 7mm Thin QFN Package
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
Ordering Information19-1045; Rev 1; 11/09
+Denotes a lead(Pb)-free/RoHS-compliant package.
EVALUATION KITAVAILABLE
PARTTEMP RANGEPIN-PACKAGEMAX17014ETM+-40°C to +85°C48 Thin QFN
7mm x 7mm
Dual Mode is a trademark of Maxim Integrated Products, Inc.
True Shutdown is a trademark of Maxim Integrated Products, Inc.
Simplified Operating Circuit and Pin Configuration appear
at end of data sheet.
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, VIN= VIN2= 12V, AVDD= VOVIN= VSUP= 15V, TA
= 0°C to +85°C. Typical values are at TA= +25°C, unless oth-
erwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VIN, IN2, OVIN, SUP, EN1, EN2, FSEL to GND......-0.3V to +22V
GND1, OGND, CPGND to GND.........................................±0.3V
MODE, DLP, CTL, THR, DEL1, DEL2, VL to GND...-0.3V to +7.5V
REF, FBP, FBN, FB1, FB2, COMP,
OUT to GND...........................................-0.3V to (VVL + 0.3V)
SWI, SWO to GND..................................................-0.3V to +22V
LX1 to GND1..........................................................-0.3V to +22V
SWI to SWO............................................................-0.3V to +22V
SWI to SUI.............................................................-0.3V to +7.5V
POS1, NEG1, OUT1, POS2, NEG2,
OUT2 to OGND...................................-0.3V to (VOVIN + 0.3V)
DRVN, DRVP to CPGND...........................-0.3V to (VSUP + 0.3V)
LX2 to CPGND...........................................-0.3V to (VIN2+ 0.3V)
BST to VL................................................................-0.3V to +22V
SRC to GND...........................................................-0.3V to +48V
GON, DRN to GND...................................-0.3V to (VSRC + 0.3V)
GON to DRN...........................................................-0.3V to +48V
POS_ to NEG_ RMS Current...................................5mA (Note 1)
REF Short Circuit to GND...........................................Continuous
RMS LX1 Current (total for both pins)...................................3.2A
RMS GND1 Current (total for both pins)...............................3.2A
RMS IN2 Current (total for both pins)....................................3.2A
RMS LX2 Current (total for both pins)...................................3.2A
RMS CPGND Current............................................................0.8A
RMS SWI Current..................................................................2.4A
RMS SWO Current................................................................2.4A
RMS DRVN, DRVP Current...................................................0.8A
RMS VL Current..................................................................50mA
Continuous Power Dissipation (TA= +70°C)
48-Pin Thin QFN
(derate 38.5mW/°C above +70°C).........................3076.9mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+160°C
Storage Temperature Range.............................-65°C to +165°C
Soldering Temperature (reflow).......................................+260°C
PARAMETERCONDITIONSMINTYPMAXUNITS
GENERALVIN, IN2 Input Voltage Range 8.0 16.5 V
VIN + IN2 Quiescent Current Only LX2 switching (VFB1 = VFBP = 1.5V, VFBN = 0);
EN1 = EN2 = VL, VFSEL= 0 8 mA
VIN + IN2 Standby Current LX2 not switching (VFB1 = VFB2 = VFBP = 1.5V,
VFBN = 0); EN1 = EN2 = VL, VFSEL= 0 2 mA
VIN + IN2 Shutdown Current EN1 = EN2 = GND (shutdown) 300 μA
SUP + OVIN Shutdown Current EN1 = EN2 = GND (shutdown) 10 μA
FSEL = VIN 1020 1200 1380 SMPS Operating Frequency
FSEL = GND 510 600 690
kHz
Phase Difference Between Step-
Down/Positive and Step-Up/Negative
Regulators 180 Degrees
VIN Undervoltage Lockout Threshold VIN rising edge, 100mV typical hysteresis 5.75 6.50 7.25 V
VL REGULATORVL Output Voltage IVL = 25mA, VFB1 = VFB2 = VFBP = 1.1V, VFBN =
0.4V (all regulators switching) 4.9 5.0 5.1 V
VL Undervoltage Lockout Threshold VL rising edge, 100mV typical hysteresis 3.5 3.9 4.3 V
Note 1:See Figure 6 for the op amp clamp structures.
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
PARAMETERCONDITIONSMINTYPMAXUNITS
REFERENCEREF Output Voltage No external load 1.235 1.250 1.265 V
REF Load Regulation 0 < ILOAD < 50μA 10 mV
REF Sink Current In regulation 10 μA
REF Undervoltage Lockout Threshold Rising edge; 20mV typical hysteresis 1.0 1.2 V
STEP-DOWN REGULATOR0°C < TA< +85°C 3.25 3.30 3.35 OUT Voltage in Fixed Mode FB2 = GND, no load
(Note 2) TA = +25°C 3.2673.333V
0°C < TA< +85°C 1.23 1.25 1.27 FB2 Voltage in Adjustable Mode VOUT = 2.5V, no load
(Note 2) TA = +25°C 1.23751.2625V
FB2 Adjustable-Mode Threshold
Voltage Dual-mode comparator 0.10 0.15 0.20 V
Output Voltage Adjust Range Step-down output 1.5 5.0 V
FB2 Fault Trip Level Falling edge 0.96 1.00 1.04 V
FB2 Input Leakage Current VFB2 = 1.5V 50 125 200 nA
DC Load Regulation 0A < ILOAD < 2A 0.5 %
DC Line Regulation No load, 10.8V < VIN2 < 13.2V 0.1 %/V
LX2-to-IN2 nMOS Switch
On-Resistance 120 240 m
LX2-to-CPGND nMOS Switch
On-Resistance 6 10 23
BST-to-VL PMOS Switch
On-Resistance 7 12 20
Low-Frequency Operation
OUT Threshold Step-down only 0.8 V
FSEL = VIN 217 Low-Frequency Operation
Switching Frequency FSEL = GND 108 kHz
LX2 Positive Current Limit 2.50 3 3.50 A
Soft-Start Period 3 ms
Soft-Start Step Size VREF /
128 V
Maximum Duty Factor 70 80 90 %
STEP-UP REGULATOR Output Voltage Range VVIN 20 V
Oscillator Maximum Duty Cycle 69 75 81 %
Minimum tON 70 ns
0°C < TA< +85°C 1.235 1.25 1.265 FB1 Regulation Voltage FB1 = COMP,
CCOMP = 1nF TA = +25°C 1.23751.2625V
FB1 Fault Trip Level Falling edge 0.96 1.00 1.04 V
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VIN= VIN2= 12V, AVDD= VOVIN= VSUP= 15V, TA
= 0°C to +85°C. Typical values are at TA= +25°C, unless oth-
erwise noted.)
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VIN= VIN2= 12V, AVDD= VOVIN= VSUP= 15V, TA
= 0°C to +85°C. Typical values are at TA= +25°C, unless oth-
erwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS FB1 Load Regulation 0 < ILOAD < full, transient only -1 %
FB1 Line Regulation 10.8V < VVIN < 13.2V 0.08 0.15 %/V
FB1 Input Bias Current VFB1 = 1.25V 25 125 200 nA
FB1 Transconductance I = ±2.5μA at COMP, FB1 = COMP150 320 560 μS
FB1 Voltage Gain FB1 to COMP 1400 V/V
LX1 Leakage Current VFB1 = 1.5V, VLX1 = 20V 4 40 μA
LX1 Current Limit VFB1 = 1.1V, duty cycle = 25%3.2 3.7 4.2 A
Current-Sense Transresistance 0.16 0.23 0.30 V/A
LX1 On-Resistance 110 220 m
Soft-Start Period 3 ms
Soft-Start Step Size ILIM/
128 A
POSITIVE AND NEGATIVE CHARGE-PUMP REGULATORS SUP Input Supply Range 8.0 18.0 V
SUP Input Supply Current VFBP = 1.5V, VFBN = 0.15V (not switching) 0.2 0.4 mA
SUP Overvoltage Threshold SUP rising edge, 250mV typical hysteresis (Note 3) 18 19 20 V
0°C < TA< +85°C 1.23 1.25 1.27 FBP Regulation Voltage TA= +25°C 1.2375 1.2625 V
FBP Line-Regulation Error 11V < VSUP < 16V, not in dropout 0.2 %/V
FBP Input Bias Current VFBP = 1.5V -50 +50 nA
DRVP p-Channel MOSFET
On-Resistance 1.0 3.0
DRVP n-Channel MOSFET
On-Resistance0.5 1.0
FBP Fault Trip Level Falling edge 0.96 1.00 1.04 V
Positive Charge-Pump Soft-Start Period 3 ms
Positive Charge-Pump Soft-Start
Step Size
VREF /
128 V
0°C < TA< +85°C 0.988 1.000 1.012 FBN Regulation Voltage VREF - VFBNTA = +25°C 0.99 1.00 1.01 V
FBN Input Bias Current VFBN = 0mV -50 +50 nA
FBN Line Regulation Error 11V < VSUP < 16V, not in dropout 0.2 %/V
DRVN p-Channel On-Resistance 1.0 3.0
DRVN n-Channel On-Resistance 0.5 1.0
FBN Fault Trip Level Rising edge 450 500 550 mV
Negative Charge-Pump Soft-Start 3 ms
Negative Charge-Pump Soft-Start
Step Size
(VREF -
VFBN) /
128
V
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VIN= VIN2= 12V, AVDD= VOVIN= VSUP= 15V, TA
= 0°C to +85°C. Typical values are at TA= +25°C, unless oth-
erwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS
AVDD SWITCH SWI Supply Range 8.0 18.5 V
SWI Overvoltage Fault Threshold SWI rising edge, 250mV typical hysteresis (Note 3) 18.50 19.25 20.00 V
SWI-SWO Switch Resistance 120 240 m
SUI-SWI Pullup Resistance EN2 = GND 30
SUI Output Sink Current EN2 = DEL2 = VL 24 30 36 μA
SWI-SUI Done Threshold EN2 = DEL2 = VL 4.4 5.0 5.6 V
OPERATIONAL AMPLIFIERS OVIN Supply Range 8 18 V
OVIN Overvoltage Fault Threshold OVIN rising edge, 250mV typical hysteresis (Note 3) 18 19 20 V
OVIN Supply Current Buffer configuration, VPOSx = VOVIN / 2, no load 4.2 6mA
Input Offset Voltage 2V < (VNEGx, VPOSx) < (VOVIN - 2V), TA = +25°C -10 +10 mV
Input Bias Current 2V < (VNEGx, VPOSx) < (VOVIN - 2V) -1 +1 μA
Input Common-Mode Voltage Range 0 VOVIN V
Input Common-Mode Rejection 2V < (VNEGx, VPOSx) < (VOVIN - 2V) 100 dB
Output Voltage Swing High IOUTx = 25mA VOVIN -
300
VOVIN -
150 mV
Output Voltage Swing Low IOUTx = -25mA 150 300 mV
Large-Signal Voltage Gain 2V < (VNEGx, VPOSx)< (VOVIN - 2V) 80 dB
Slew Rate 2V < (VNEGx, VPOSx) < (VOVIN - 2V) 100 V/μs
-3dB Bandwidth 2V < (VNEGx, VPOSx) < (VOVIN - 2V) 20 MHz
Short to VOVIN / 2, sourcing 150 Short-Circuit Current Short to VOVIN / 2, sinking 250 mA
HIGH-VOLTAGE SWITCH ARRAY SRC Supply Range 44 V
SRC Supply Current 200 500 μA
GON-to-SRC Switch On-Resistance VDLP = 2V, CTL = VL 1020
GON-to-SRC Switch Saturation Current (VSRC - VGON) > 5V 150 390 mA
GON-to-DRN Switch On-Resistance VDLP = 2V, CTL = GND 20 50
GON-to-DRN Switch Saturation Current (VGON - VDRN) > 5V 75 180 mA
GON-to-GND Switch On-Resistance DLP = GND, VGON = 5V 2.5 6.0 12.5 k
CTL Input Low Voltage 0.6 V
CTL Input High Voltage 1.6 V
CTL Input Current CTL = GND or VL -1 +1 μA
CTL-to-GON Rising Propagation Delay 1k from DRN to GND, CTL = GND to VL step, no load
on GON, measured from VCTL = 2V to GON = 20% 100 ns
CTL-to-GON Falling Propagation Delay 1k from DRN to GND, CTL = VL to GND step, no load
on GON, measured from VCTL = 0.6V to GON = 80% 100 ns
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VIN= VIN2= 12V, AVDD= VOVIN= VSUP= 15V, TA
= 0°C to +85°C. Typical values are at TA= +25°C, unless oth-
erwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITSMode 1 Voltage ThresholdVMODE rising edge4.5V
MODE Capacitor Charge Current
(Mode 2)V M OD E < M OD E cur r ent- sour ce stop vol tag e thr eshol d 405060µA
MODE Voltage Threshold for
Enabling DRN Switch Control
in Mode 2
GON connects to DRN, VMODE rising edge1.201.31.4V
MODE Current-Source Stop
Voltage ThresholdMODE rising edge23V
THR-to-GON Voltage Gain9.410.010.6V/V
SEQUENCE CONTROLEN1, EN2, Input Low Voltage0.6V
EN1, EN2 Input High Voltage1.6V
EN1, EN2 Pulldown Resistance1M_
DEL1, DEL2, DLP Charge CurrentVDEL1 = VDEL2 = VDLP = 1V6810µADEL1, DEL2, DLP Turn-On Threshold1.191.251.31kV
DEL1, DEL2, DLP Discharge
Switch On-ResistanceEN1 = GND or fault tripped10_
FBN D i schar g e S w i tch On- Resi stanceEN2 = GND or fault tripped3k_
FAULT DETECTIONDuration to Trigger Fault 50 ms
Duration to Restart After Fault160ms
Number of Restart Attempts
Before Shutdown3Times
Thermal-Shutdown Threshold15°C typical hysteresis+160°C
SWITCHING FREQUENCY SELECTIONFSEL Input Low Voltage600kHz0.6V
FSEL Input High Voltage1.2MHz1.6V
FSEL Pulldown Resistance1M_
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, VIN= VIN2= 12V, AVDD= VOVIN= VSUP= 15V, TA
= -40°C to +85°C. Typical values are at TA= +25°C, unless
otherwise noted.) (Note 4)
PARAMETERCONDITIONSMINTYPMAXUNITS
GENERALVIN, IN2 Input Voltage Range 8.0 16.5 V
FSEL = VIN 1020 1380 SMPS Operating Frequency FSEL = GND 510 690 kHz
VIN Undervoltage Lockout Threshold VIN rising edge, 100mV typical hysteresis 5.75 7.25 V
VL REGULATORVL Output Voltage IVL = 25mA, VFB1 = VFB2 = VFBP = 1.1V,
VFBN = 0.4V (all regulators switching) 4.9 5.1 V
VL Undervoltage Lockout Threshold VL rising edge, 100mV typical hysteresis 3.5 4.3 V
REFERENCEREF Output Voltage No external load 1.235 1.265 V
REF Load Regulation 0 < ILOAD < 50μA 10 mV
REF Undervoltage Lockout Threshold Rising edge; 20mV typical hysteresis 1.2 V
STEP-DOWN REGULATOROUT Voltage in Fixed Mode FB2 = GND, no load (Note 2) 3.25 3.35 V
FB2 Voltage in Adjustable Mode VOUT = 2.5V, no load (Note 2) 1.23 1.27 V
FB2 Adjustable-Mode
Threshold Voltage Dual-mode comparator 0.10 0.20 V
Output Voltage Adjust Range Step-down output 1.5 5.0 V
LX2-to-IN2 nMOS Switch
On-Resistance 240 m
LX2-to-CPGND nMOS Switch
On-Resistance 6 23
BST-to-VL pMOS Switch
On-Resistance 7 20
LX2 Positive Current Limit 2.50 3.50 A
Maximum Duty Factor 70 90 %
STEP-UP REGULATOR Output Voltage Range VVIN 20 V
Oscillator Maximum Duty Cycle 69 81 %
FB1 Regulation Voltage FB1 = COMP, CCOMP = 1nF 1.23 1.27 V
LX1 Current Limit VFB1 = 1.1V, duty cycle = 25% 3.2 4.2 A
Current-Sense Transresistance 0.16 0.30 V/A
LX1 On-Resistance 220 m
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VIN= VIN2= 12V, AVDD= VOVIN= VSUP= 15V, TA
= -40°C to +85°C. Typical values are at TA= +25°C, unless
otherwise noted.) (Note 4)
PARAMETERCONDITIONSMINTYPMAXUNITS
POSITIVE AND NEGATIVE CHARGE-PUMP REGULATORS VSUP Input Supply Range 8 18 V
VSUP Overvoltage Threshold SUP rising edge, 250mV typical hysteresis (Note 3) 18 20 V
FBP Regulation Voltage 1.23 1.27 V
DRVP p-Channel MOSFET
On-Resistance 3
DRVP n-Channel MOSFET
On-Resistance1
FBN Regulation Voltage VREF - VFBN 0.985 1.015 V
DRVN p-Channel On-Resistance 3
DRVN n-Channel On-Resistance 1
AVDD SWITCH SWI Supply Range 8.0 18.5 V
SWI Overvoltage Fault Threshold VOVIN = rising, 250mV typical hysteresis (Note 3) 18.5 20.0 V
SWI-SWO Switch Resistance 240 m
SUI Output Sink Current EN2 = DEL2 = VL 24 36 μA
SWI-SUI Done Threshold EN2 = DEL2 = VL 4.4 5.6 V
OPERATIONAL AMPLIFIERS OVIN Supply Range 8 18 V
OVIN Overvoltage Fault Threshold SWI rising edge, 250mV typical hysteresis (Note 2) 18 20 V
Input Common-Mode Voltage Range 0 VOVIN V
Output Voltage Swing High IOUTx = 25mA VOVIN -
300 mV
Output Voltage Swing Low IOUTx = -25mA 300 mV
HIGH-VOLTAGE SWITCH ARRAY SRC Supply Range 44 V
GON-to-SRC Switch On-Resistance VDLP = 2V, CTL = VL 20
GON-to-DRN Switch On-Resistance VDLP = 2V, CTL = GND 50
GON-to-GND Switch On-Resistance DLP = GND, VGON = 5V 2.5 12.5 k
CTL Input Low Voltage 0.6 V
CTL Input High Voltage 1.6 V
Mode 1 Voltage Threshold VMODE rising edge 4.5 V
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
Note 2:When the inductor is in continuous conduction (EN2 = VL or heavy load), the output voltage has a DC regulation level lower than
the error comparator threshold by 50% of the output voltage ripple. In discontinuous conduction (EN2 = GND with light load), the
output voltage has a DC regulation level higher than the error comparator threshold by 50% of the output voltage ripple.
Note 3:Disables boost switching if either SUP, SWI, or OVIN exceeds the threshold. Switching resumes when no threshold is exceeded.
Note 4:Specifications to -40°C are guaranteed by design, not production tested.
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VIN= VIN2= 12V, AVDD= VOVIN= VSUP= 15V, TA
= -40°C to +85°C. Typical values are at TA= +25°C, unless
otherwise noted.) (Note 4)
PARAMETERCONDITIONSMINTYPMAXUNITSO D E V ol tag e Thr eshol d for E nab l i ng RN S w i tch C ontr ol i n M od e 2GON connects to DRN, VMODE rising edge1.21.4V
MODE Current-Source Stop Voltage
ThresholdMODE rising edge23V
THR-to-GON Voltage Gain9.410.6V/V
SEQUENCE CONTROLEN1, EN2 Input Low Voltage0.6V
EN1, EN2 Input High Voltage1.6V
SWITCHING FREQUENCY SELECTIONFSEL Input Low Voltage600kHz0.6V
FSEL Input High Voltage1.2MHz1.6V
Typical Operating Characteristics(Circuit of Figure 1. VIN= VINL= VSUP= 12V, AVDD= 16V, VGON= 34.5V, VGOFF= -6V, VOUT1= 3.3V, TA= +25°C, unless other-
wise noted.)
STEP-DOWN REGULATOR EFFICIENCY
vs. LOAD CURRENTMAX17014 toc01
LOAD CURRENT (A)
EFFICIENCY (%)0.1
EN1 = VL, EN2 = GND
EN1 = VL, EN2 = VL
STEP-DOWN REGULATOR
OUTPUT VOLTAGE vs. LOAD CURRENTMAX17014 toc02
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
EN1 = VL, EN2 = GND
EN1 = VL, EN2 = VL
STEP-DOWN REGULATOR
LOAD TRANSIENT RESPONSEMAX17014 toc03
10μs/div
A: VOUT, 100mV/div
B: LOAD CURRENT, 2A/div
C: INDUCTOR CURRENT, 1A/div
3.3V
0.1A
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVsypical Operating Characteristics (continued)(Circuit of Figure 1. VIN= VINL= VSUP= 12V, AVDD= 16V, VGON= 34.5V, VGOFF= -6V, VOUT1= 3.3V, TA= +25°C, unless other-
wise noted.)
STEP-DOWN REGULATOR
SOFT-START (HEAVY LOAD)MAX17014 toc04
4.00ms/div
A: VIN, 5V/div
B: VOUT, 1V/div
C: INDUCTOR CURRENT,
500mA/div
D: VLX2, 10V/div
STEP-UP REGULATOR EFFICIENCY
vs. LOAD CURRENTMAX17014 toc05
LOAD CURRENT (A)
EFFICIENCY (%)0.10.01
STEP-UP REGULATOR
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX17014 toc06
LOAD CURRENT (A)
(V)
STEP-UP REGULATOR
SOFT-START (HEAVY LOAD)
MAX17014 toc07
10.00ms/div
A: EN2, 5V/div
B: DEL2, 5V/div
C: AVDD, 5V/div
D: VSUI, 5V/div
E: INDUCTOR CURRENT,
1.00A/div
STEP-UP REGULATOR
LOAD-TRANSIENT RESPONSEMAX17014 toc08
20.0µs/div
A: LOAD CURRENT,
1A/div
B: AVDD, 200mV/div
C: INDUCTOR CURRENT,
2A/div
50mA
16V
STEP-UP REGULATOR PULSED
LOAD-TRANSIENT RESPONSEMAX17014 toc09
10.0µs/div
A: LOAD CURRENT,
1A/div
B: AVDD, 200mV/div
C: INDUCTOR CURRENT,
2A/div
0.2A
16V
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
STEP-UP REGULATOR CURRENT LIMIT
vs. INPUT VOLTAGEMAX17014 toc10
INPUT VOLTAGE (V)
STEP-UP CURRENT LIMIT (A)14101112139
AVDD = 16V
AVDD = 18V
L1 = 4.7µH
(CDEP134NP-4R8M, ISAT = 9.3A)
TIME-DELAY LATCH
RESPONSE TO OVERLOADMAX17014 toc11
200ms/div
A: VOUT, 5V/div
B: VAVDD, 10V/div
C: VGON, 50V/div
D: VGOFF, 5V/div
E: L1 INDUCTOR CURRENT,
5A/div
SWITCHING FREQUENCY
vs. INPUT VOLTAGEMAX17014 toc12
VIN (V)
SWITCHING FREQUENCY (MHz)1011129
VL LOAD REGULATION
MAX17014 toc13
LOAD CURRENT (mA)
VL (V)204060
EN1 = EN2 = VL
EN1 = EN2 = GND
REFERENCE VOLTAGE
LOAD REGULATIONMAX17014 toc14
LOAD CURRENT (µA)
REFERENCE VOLTAGE (V)
EN1 = EN2 = VL
EN1 = EN2 = GND
POSITIVE CHARGE-PUMP REGULATOR
NORMALIZED LINE REGULATIONMAX17014 toc15
VIN (V)
SRC
(%)1214
ISRC = 0A
ISRC = 25mA
ypical Operating Characteristics (continued)(Circuit of Figure 1. VIN= VINL= VSUP= 12V, AVDD= 16V, VGON= 34.5V, VGOFF= -6V, VOUT1= 3.3V, TA= +25°C, unless other-
wise noted.)
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVsypical Operating Characteristics (continued)(Circuit of Figure 1. VIN= VINL= VSUP= 12V, AVDD= 16V, VGON= 34.5V, VGOFF= -6V, VOUT1= 3.3V, TA= +25°C, unless other-
wise noted.)
POSITIVE CHARGE-PUMP REGULATOR
NORMALIZED LOAD REGULATIONMAX17014 toc16
LOAD CURRENT (mA)
OUTPUT VOLTAGE ERROR (%)
POSITIVE CHARGE-PUMP REGULATOR
LOAD-TRANSIENT RESPONSE
MAX17014 toc17
40.0µs/div
A: VSRC, 100mV/div
B: LOAD CURRENT, 20mA/div
70mA
10mA
34.8V
NEGATIVE CHARGE-PUMP REGULATOR
NORMALIZED LINE REGULATIONMAX17014 toc18
VIN (V)
OUTPUT VOLTAGE ERROR (%)1113
NEGATIVE CHARGE-PUMP REGULATOR
NORMALIZED LOAD REGULATION
MAX17014 toc19
LOAD CURRENT (mA)
OUTPUT VOLTAGE ERROR (%)
NEGATIVE CHARGE-PUMP REGULATOR
LOAD-TRANSIENT RESPONSE
MAX17014 toc20
20.0µs/div
A: VGOFF, 100mV/div
B: LOAD CURRENT, 65mA/div
110mA
10mA
-6V
POWER-UP SEQUENCEMAX17014 toc21
20.0ms/div
A: VEN1, 5V/div
B: VOUT, 5V/div
C: VDEL1, 5V/div
D: VGOFF, 5V/div
E: VAVDD, 10V/div
F: VDEL2, 5V/div
G: VSRC, 20V/div0VCF
VEN2 = VL
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVsypical Operating Characteristics (continued)(Circuit of Figure 1. VIN= VINL= VSUP= 12V, AVDD= 16V, VGON= 34.5V, VGOFF= -6V, VOUT1= 3.3V, TA= +25°C, unless other-
wise noted.)
OPERATIONAL AMPLIFIER RAIL-TO-RAIL
INPUT/OUTPUTMAX17014 toc22
4.0µs/div
A: INPUT SIGNAL, 5V/div
B: OUTPUT SIGNAL, 5V/div
OPERATIONAL AMPLIFIER
LOAD-TRANSIENT RESPONSEMAX17014 toc23
200ns/div
A: OUTPUT CURRENT, 50mA/div
B: OUTPUT VOLTAGE, 500mV/div
50mA
0mA
-50mA
OPERATIONAL AMPLIFIER
LARGE-SIGNAL RESPONSEMAX17014 toc24
400ns/div
A: INPUT SIGNAL, 5V/div
B: OUTPUT SIGNAL, 5V/div
OPERATIONAL AMPLIFIER
SMALL-SIGNAL RESPONSEMAX17014 toc25
100ns/div
A: INPUT SIGNAL, 200mV/div
B: OUTPUT SIGNAL, 200mV/div
VIN SUPPLY CURRENT vs. VIN VOLTAGEMAX17014 toc26
VIN VOLTAGE (V)
SUPPLY CURRENT (mA)12131415
EN1 = EN2 = VL
EN1 = EN2 = GND
INL SUPPLY CURRENT vs. TEMPERATUREMAX17014 toc27
TEMPERATURE (°C)
INL SUPPLY CURRENT (mA)
EN1 = VL, EN2 = GND
EN1 = EN2 = GND
HIGH-VOLTAGE SWITCH
CONTROL FUNCTION (MODE 1)MAX17014 toc28
4.00µs/divA: VCTL, 5V/div
C: VGON, 10V/div
CGON = 2.2nF
HIGH-VOLTAGE SWITCH
CONTROL FUNCTION (MODE 2)MAX17014 toc29
4.00µs/div
A: VCTL, 5V/div
C: VGON, 10V/div
CGON = 2.2nF
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
Pin Description
PINNAMEFUNCTIONPOS1 Operational Amplifier 1 Noninverting Input
2 OUT1 Operational Amplifier 1 Output
3 THR
GON Low-Level Regulation Set-Point Input. Connect THR to the center of a resistive voltage-divider
between AVDD and GND to set the VGON falling regulation level. The regulation level is 10 x VTHR.
See the High-Voltage Switch Control section for details.
4 MODE
High-Voltage Switch-Control Block Mode Selection Input and Timing-Adjustment Input. See the
High-Voltage Switch Control section for details. MODE is high impedance when it is connected to
VL. MODE is internally pulled to GND by a 10 resistor for 0.1μs typical when the high-voltage
switch-control block is enabled.
5 CTL High-Voltage Switch-Control Block Timing Control Input. See the High-Voltage Switch Control
section for details.DLP GON Output Enable. See the High-VoltageSwitch Control section for details.DRN Switch Input. Drain of the internal high-voltage p-channel MOSFET between DRN and GON.
8 GON Internal High-Voltage MOSFET Switch Common Terminal. GON is the output of the high-voltage
switch-control block. SRC Switch Input. Source of the internal high-voltage p-channel MOSFET between SRC and GON.
10 FBP
Positive Charge-Pump Regulator Feedback Input. Connect FBP to the center of a resistive voltage-
divider between the positive charge-pump regulator output and GND to set the positive charge-
pump regulator output voltage. Place the resistive voltage-divider within 5mm to FBP.
11 CPGND Charge Pump and Step-Down Regulator Power Ground
12 DRVP Positive Charge-Pump Driver Output. Connect DRVP to the positive charge-pump flying capacitor(s).
13 SUP Supply Input for the Charge-Pump Drivers. Connect this pin to the output of the boost regulator SWI
and bypass to CPGND with a 0.1μF capacitor.
14 DRVN Negative Charge-Pump Driver Output. Connect DRVN to the negative charge-pump flying capacitor(s).
15, 34 GND Analog Ground
16 FBN
Negative Charge-Pump Regulator Feedback Input. Connect FBN to the center of a resistive
voltage-divider between the negative output and REF to set the negative charge-pump regulator
output voltage. Place the resistive voltage-divider within 5mm of FBN.
17 REF Reference Output. Connect a 0.22μF capacitor from REF to GND. All power outputs are disabled
until REF exceeds its UVLO threshold. REF is active whenever VIN is above VIN UVLO threshold.
18 DEL1
Negative Charge-Pump Delay Input. Connect a capacitor from DEL1 and GND to set the delay time
between the step-down output and the negative output. An 8μA current source charges CDEL1.
DEL1 is internally pulled to GND through 10 resistance when EN1 is low or VL is below its UVLO.
19 N.C. No Connection. Not internally connected.
20 OUT Step-Down Regulator Output-Voltage Sense. Connect OUT to the step-down regulator output.
21 FB2
Step-Down Regulator Feedback Input. Connect FB2 to GND to select the step-down converter’s
3.3V fixed mode. For adjustable mode, connect FB2 to the center of a resistive voltage-divider
between the step-down regulator output and GND to set the step-down regulator output voltage.
Place the resistive voltage-divider within 5mm of FB2.
22 BST Step-Down Regulator Bootstrap Capacitor Connection for High-Side Gate Driver. Connect a 0.1μF
ceramic capacitor from BST to LX2.
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
Pin Description (continued)
PINNAMEFUNCTION23, 24 LX2
Step-Down Regulator Switching Node. LX2 is the source of the internal n-channel MOSFET
connected between IN2 and LX2. Connect the inductor and Schottky catch diode close to both LX2
pins to minimize the trace area for low EMI.
25, 26 IN2 Step-Down Regulator Power Input. Drain of the internal n-channel MOSFET connected between IN2
and LX2.
27 VINInput of the Internal 5V Linear Regulator and the Startup Circuitry. Bypass VIN to GND with 0.22μF
close to the IC.
28 FSEL Frequency-Select Pin. Connect FSEL to GND for 600kHz operation. Connect to VL or VIN for 1.2MHz
operation.
29 DEL2
Step-Up Regulator and Positive Charge-Pump Delay Input. Connect a capacitor from DEL2 and
GND to set the delay time between EN2 and the startup of these regulators, or between the step-
down startup and the startup of these regulators if EN1 is high before the step-down starts. An 8μA
current source charges CDEL2. DEL2 is internally pulled to GND through 10 resistance when EN1
or EN2 is low or when VL is below its UVLO threshold.
30 VL
5V Internal Linear Regulator Output. Bypass VL to GND with 1μF minimum. Provides power for the
internal MOSFET driving circuit, the PWM controllers, charge-pump regulators, logic, and reference
and other analog circuitry. Provides 25mA load current when all switching regulators are enabled.
VL is active whenever VIN is above VIN UVLO threshold.
31 COMP Compensation Pin for the Step-Up Error Amplifier. Connect a series resistor and capacitor from
COMP to ground.
32 EN2 Step-Up and Positive Charge-Pump Regulator Enable Input. Input HIGH also enables DEL2 pullup
current. EN2 is inactive when EN1 is low. See the Power-Up Sequence section for details.
33 EN1 Step-Down and Negative Charge-Pump Regulator Enable Input. Input HIGH also enables DEL1
pullup current.
35, 36 GND1 Step-Up Regulator Power Ground. Source of the internal power n-channel MOSFET.
37, 38 LX1 Step-Up Regulator Power MOSFET n-Channel Drain and Switching Node. Connect the inductor and
Schottky catch diode to both LX1 pins and minimize the trace area for lowest EMI.
39 SWI Step-Up Regulator Internal p-Channel MOSFET Pass Switch Source Input. Connect to the cathode of
the step-up regulator Schottky catch diode.
40 SUI Step-Up Regulator Internal p-Channel MOSFET Pass Switch Gate Input. Connect a capacitor from
SUI to SWI to set the delay time. A 30μA current source pulls down on CSUI when DEL2 is high.
41 FB1
Boost Regulator Feedback Input. Connect FB1 to the center of a resistive voltage-divider between
the boost regulator output and GND to set the boost regulator output voltage. Place the resistive
voltage-divider within 5mm of FB1.
42 SWO Step-Up Regulator Internal p-Channel MOSFET Pass Switch Drain Output
43 OVIN Operational Amplifier Power Input
44 NEG2 Operational Amplifier 2 Inverting Input
45 POS2 Operational Amplifier 2 Noninverting Input
46 OUT2 Operational Amplifier Output 2
47 OGND Operational Amplifier Power Ground
48 NEG1 Operational Amplifier 1 Inverting Input
EP GND Exposed Paddle = GND
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVsLX2
REF
FB1
LX1LX1
GND
COMP
VIN
12V
OUT
3.3V
AVDD
16V
1.5A
FSEL
FB2
OUT
STEP-DOWN,
NEGATIVE CHARGE
PUMP ON/OFF
VINVIN
GON35V
50mA
OVIN
OGND
REF
BST
GON
DRN
CTL
SWI
GON CONTROL
DRVN
FBN
REF
DRVP
FBP
SUP
CPGND
SRC
GND1GND1
NEG2
OUT2
VCOM1
4.7μH
10μF
0.1μF
2.6μH
C12
1μF
C13
0.1μF
0.1μF
DEL2
DEL1
EN1
EN2
N.C.
NEG1
OUT1
SWI
SWO
SUI
POS1
C14
0.1μF
THR
POS2
DLP
MODE
10μF
10μF35363738
AVDD43
VCOM2
1kΩ
SWI
SRC12
C20
0.1μF
C21
0.1μFC22
0.1μF
AVDD11
IN2IN225
0.1μF
LX2
STEP-UP, POSITIVE
CHARGE PUMP ON/OFF
GOFF
-6V
100mA
MAX17014
1μF
0.22μF
0.1μF
C10
0.15μF
C11
0.15μF22μF
C23
1μF
C18
0.1μF
C17
330pF
82kΩ
13.3kΩ
20kΩ
2.2kΩ
R16
367kΩ
R17
13.3kΩ
158kΩ
13.3kΩ
150kΩ
23kΩEP
C19
0.1μF
C16
10μF
C15
10μF
C24
10μF
MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
Typical Operating CircuitThe typical operating circuit (Figure 1) of the
MAX17014 is a complete power-supply system for TFT
LCD panels in monitors and TVs. The circuit generates
a +3.3V logic supply, a +16V source driver supply, a
+34.5V positive gate driver supply, and a -6V negative
gate driver supply from a 12V ±10% input supply.
Table 1 lists some selected components and Table 2
lists the contact information for component suppliers.
Detailed DescriptionThe MAX17014 is a multiple-output power supply
designed primarily for TFT LCD panels used in moni-
tors and TVs. It contains a step-down switching regula-
tor to generate the logic supply rail, a step-up switching
regulator to generate the source driver supply, and two
charge-pump regulators to generate the gate driver
supplies. Each regulator features adjustable output
voltage, digital soft-start, and timer-delayed fault pro-
tection. Both the step-down and step-up regulators use
a fixed-frequency current-mode control architecture.
The two switching regulators are 180°out-of-phase to
minimize the input ripple. The internal oscillator offers
two pin-selectable frequency options (600kHz/1.2MHz),
allowing users to optimize their designs based on the
specific application requirements. The MAX17014
includes two high-performance operational amplifiers
designed to drive the LCD backplane (VCOM). The
amplifiers feature high output current (±150mA), fast
slew rate (100V/µs), wide bandwidth (20MHz), and rail-
to-rail inputs and outputs. In addition, the MAX17014
features a high-voltage switch-control block, an internal
5V linear regulator, a 1.25V reference output, well-
defined power-up and power-down sequences, and
thermal-overload protection. Figure 2 shows the
MAX17014 functional diagram.
Step-Down RegulatorThe step-down regulator consists of an internal n-chan-
nel MOSFET with gate driver, a lossless current-sense
network, a current-limit comparator, and a PWM con-
troller block. The external power stage consists of a
Schottky diode rectifier, an inductor, and output capac-
itors. The output voltage is regulated by changing the
duty cycle of the n-channel MOSFET. A bootstrap cir-
cuit that uses a 0.1µF flying capacitor between LX2 and
BST provides the supply voltage for the high-side gate
driver. Although the MAX17014 also includes a 10Ω
(typ) low-side MOSFET, this switch is used to charge
the bootstrap capacitor during startup and maintains
fixed-frequency operation at light load and cannot be
used as a synchronous rectifier. An external Schottky
diode (D2 in Figure 1) is always required.
Table 1. Component List
DESIGNATIONDESCRIPTION C1, C2, C3
10μF ±20%, 16V X5R ceramic capacitors
(1206)
Taiyo Yuden EMK325BJ106MD
TDK C3225X7R1C106M
C5
22μF ±10%, 6.3V X5R ceramic capacitor
(1206)
Taiyo Yuden JMK316BJ226KL
Murata GRM31CR60J226M
C15, C16, C24
10μF ±20%, 25V X5R ceramic capacitors
(1210)
TDK C3225X5R1E106M
D1, D2
3A, 30V Schottky diodes (M-Flat)
Toshiba CMS02 (TE12L,Q)
Central Semiconductor
D3, D4, D5
200mA, 100V dual ultra-fast diodes
(SOT23)
Fairchild MMBD4148SE (top mark D4)
Central Semiconductor CMPD1001S lead
free (top mark L21)
Low-profile 4.7μH, 3.5A inductor
(2mm height)
TOKO FDV0620-4R7M
Low-profile 2.4μH, 2.6A inductor
(1.8mm height)
TOKO 1124BS-2R4M (2.4μH)
Wurth 744052002 (2.5μH)
Table 2. Component Suppliers
SUPPLIERPHONEFAXWEBSITEFairchild Semiconductor408-822-2000408-822-2102www.fairchildsemi.com
Sumida847-545-6700847-545-6720www.sumida.com
TDK847-803-6100847-390-4405www.component.tdk.com
Toshiba949-455-2000949-859-3963www.toshiba.com/taec
