MAX17113ETL+ ,Low-Cost Multiple-Output Power Supply for LCD TVsapplications10ms Internal Soft-Startrunning directly from 12V supplies.♦ Current-Mode Step-Down Reg ..
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MAX17114ETM+CB2 ,Multi-Output Power Supply with VCOM Amplifier and High-Voltage Gamma Reference for LCD TVsFeaturesThe MAX17114 generates all the supply rails for thin-film S 8.0V to 16.5V IN Supply-Voltage ..
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MAX1711EEG ,High-Speed / Digitally Adjusted Step-Down Controllers for Notebook CPUsApplicationsFBSBSTNotebook ComputersILIMDHGNDSOUTPUTDocking Stations0.925V TO 2V(MAX1711)MAX1710CPU ..
MAX4538CEE ,Quad / Low-Voltage / SPST Analog Switches with EnableGeneral Description __________
MAX4538CPE ,Quad / Low-Voltage / SPST Analog Switches with EnableGeneral Description __________
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MAX453CPA ,CMOS Video Multiplexer/AmplifierGeneral Description
The MAX452 is a unity-gain stable, 50MHz video amplifier
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MAX453CSA ,CMOS Video Multiplexer/Amplifier19-0978; Rev 0; T/87
lVl/JXI/VI
CMOS Video Multiplexer/Amplifier
MAX453CSA ,CMOS Video Multiplexer/Amplifierapplications
the ampWer's closed-loop gain will be set at 0dB or
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MAX17113ETL+-max17113etl+t
Low-Cost Multiple-Output Power Supply for LCD TVs
General DescriptionThe MAX17113 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, a Dual Mode™ logic-
controlled high-voltage switch control block, and an
adjustable-timing power-good output. The MAX17113
can operate from 8V to 16.5V input voltages and is opti-
mized 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
MAX17113 provides soft-start functions to limit inrush
current during startup. The MAX17113 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 manipula-
tion of the positive TFT gate-driver voltage.
A series p-channel MOSFET is integrated to sequence
power to AVDDafter the MAX17113 has proceeded
through normal startup, and provides True Shutdown™.
The MAX17113 is available in a small (5mm x 5mm),
low-profile (0.8mm), 40-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 (450kHz/600kHz)Current-Mode Step-Up Regulator
Built-In 24V, 3.3A, 80mΩn-Channel MOSFET
High-Accuracy Output Voltage (1%)True Shutdown
Fast Load-Transient Response
High Efficiency
10ms Internal Soft-StartCurrent-Mode Step-Down Regulator
Built-In 24V, 3A, 100mΩn-Channel MOSFET
Fast Load-Transient Response
Adjustable Output Voltage Down to 1.5V
Skip Mode at Light Load (EN2 = AGND)
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 Delay120mΩp-Channel FET for AVDDSequencingInput Undervoltage Lockout and Thermal-
Overload Protection40-Pin, 5mm x 5mm Thin QFN Package
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVs
Ordering Information19-4709; Rev 0; 8/09
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
EVALUATION KITAVAILABLE
PARTTEMP RANGEPIN-PACKAGEMAX17113ETL+-40°C to +85°C40 Thin QFN-EP*
Dual Mode is a trademark of Maxim Integrated Products, Inc.
True Shutdown is a trademark of Maxim Integrated Products, Inc.
Simplified Operating Circuit appears at end of data sheet.MAX17113
THIN QFN
5mm x 5mmTOP VIEW
DRVP
SRC
GONDRN
MODE
THR
DEL2FSELVINVLEN2PGNDIN2IN2
SWI6728293026242322
SWO
FB1
BST
FB2
DEL1
REF
GND2
EN1COMPFBN
PGOOD
CRST
AGND
AGND
DRVN
CTL
LX1
LX2LX1LX2
DLP
FBP
CPGND
OUT10
PGND
Pin Configuration
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVs
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, VVIN= VIN2= 12V, TA
= 0°C to +85°C. Typical values are at TA= +25°C, unless otherwise 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, EN1, EN2, FSELto AGND.......................-0.3V to +24V
CPGND, GND2, PGND to AGND........................................±0.3V
MODE, DLP, CTL, THR, DEL1, DEL2, VL,
PGOOD to AGND.............................................-0.3V to +7.5V
REF, FBP, FBN, FB1, FB2, COMP, OUT,
CRST to AGND.......................................-0.3V to (VVL+ 0.3V)
LX1, SWI, SWO to AGND.......................................-0.3V to +24V
SWI to SWO............................................................-0.3V to +24V
DRVN to AGND..........................................-0.3V to (VIN2+ 0.3V)
DRVP to AGND........................................-0.3V to (VSWO+ 0.3V)
LX2 to GND2..............................................-0.3V to (VIN2+ 0.3V)
BST to VL................................................................-0.3V to +24V
SRC to AGND.........................................................-0.3V to +48V
GON, DRN to AGND.................................-0.3V to (VSRC+ 0.3V)
SRC to DRN............................................................-0.3V to +40V
DRN to AGND.........................................................-0.3V to +40V
GON to DRN...........................................................-0.3V to +48V
REF Short Circuit to AGND.........................................Continuous
RMS LX1 Current (total for both pins)...................................3.2A
RMS PGND 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 GND2, 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)
40-Pin Thin QFN
(derate 35.7mW/°C above +70°C).........................2857.1mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+160°C
Storage Temperature Range.............................-65°C to +165°C
Lead Temperature (soldering, 10s)....................................+300°
PARAMETERCONDITIONSMINTYPMAXUNITS
GENERALVIN, IN2 Input Voltage Range 8.5 16.5 V
VIN + IN2 Quiescent Current Only LX2 switching (VFB1 = VFBP = 1.5V, VFBN = 0V);
EN1 = EN2 = VL, VFSEL= 0V 10 mA
VIN + IN2 Standby Current LX2 not switching (VFB1 = VFB2 = VFBP = 1.5V,
VFBN = 0V); EN1 = EN2 = VL, VFSEL= 0V 3 mA
VIN + IN2 Shutdown Current EN1 = EN2 = AGND (shutdown) 300 600 μA
SWO Shutdown Current EN1 = EN2 = AGND (shutdown) 0.25 2 μA
FSEL = VIN 510 600 690 SMPS Operating Frequency FSEL = AGND 390 450 510 kHz
Phase Difference Between Step-
Down/Positive and Step-Up/Negative
Regulators 180 Degrees
VIN Undervoltage Lockout Threshold VIN rising edge, 100mV typical hysteresis 6.0 7.0 8.3 V
VL REGULATORVL Output Voltage IVL = 25mA, VFB1 = VFB2 = VFBP = 1.1V, VFBN = 0.4V
(all regulators switching) 4.9 5.0 5.15 V
VL Undervoltage Lockout Threshold VL rising edge, 100mV typical hysteresis 3.6 4.0 4.5 V
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVs
PARAMETERCONDITIONSMINTYPMAXUNITS
REFERENCEREF Output VoltageNo external load1.2351.2501.265V
REF Load Regulation0 < ILOAD < 50μA10mV
REF Sink CurrentIn regulation10μA
RE F U nd er vol tag e- Lockout Thr eshol d Rising edge; 25mV typical hysteresis1.01.2V
STEP-DOWN REGULATOR0°C < TA < +85°C3.253.303.35OUT Voltage in Fixed ModeFB2 = AGND, no load
(Note 1)TA = +25°C3.2673.333V
0°C < TA < +85°C1.231.251.27FB2 Voltage in Adjustable ModeVOUT = 2.5V, no load
(Note 1)TA = +25°C1.23751.2625V
FB2 Adjustable-Mode
Threshold VoltageDual-mode comparator0.100.150.20V
Output-Voltage Adjust RangeStep-down output1.55.0V
FB2 Fault Trip LevelFalling edge0.941.001.06V
FB2 Input Bias CurrentVFB2 = 1.5V, TA = +25°C50125200nA
DC Load Regulation0.4A < ILOAD < 2A0.5%
DC Line RegulationNo load, 10.8V < VIN2 < 13.2V0.05%/V
LX2-to-IN2 nMOS Switch
On-Resistance100200mΩ
LX2-to-CPGND nMOS Switch
On-Resistance71225Ω
BST-to-VL pMOS Switch
On-Resistance71225Ω
Low-Frequency Operation
OUT ThresholdStep-down only0.8V
FSEL = VIN100Low-Frequency Operation
Switching FrequencyFSEL = AGND75kHz
LX2 Positive Current Limit2.5033.50A
Soft-Start Period3.3ms
Soft-Start Step SizeVREF/
128V
Maximum Duty Factor657590%
POWER-GOODFB2 Power-Good ThresholdFB2 rising0.941.001.06V
FB2 Threshold Hysteresis12mV
PGOOD Output Low VoltageIPGOOD = 1mA0.10.3V
PGOOD Leakage CurrentVPGOOD = 3V, TA = +25°C1μA
CRST Charge CurrentVCRST = 1V0.81.01.2μA
CRST Voltage Threshold1.21.251.3V
CRST Pulldown ResistanceVCRST = 1V150300Ω
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VVIN= VIN2= 12V, TA
= 0°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.)
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVs
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VVIN= VIN2= 12V, TA
= 0°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS
STEP-UP REGULATOROutput-Voltage RangeVVIN18V
Minimum tON70100ns
TA = +25°C1.23751.2501.2625FB1 Regulation VoltageFB1 = COMP,
CCOMP = 1mF0°C < TA < +85°C1.2251.275V
FB1 Fault ThresholdFB rising, hysteresis = 12mV0.961.01.06V
FB1 UVLO Threshold0.050.1250.2V
FB1 Load Regulation0A < ILOAD < full0.5%
FB1 Line Regulation10.8V < VIN < 13.2V0.080.15%/V
FB1 Input Bias CurrentVFB1 = 1.25V20125300nA
FB1 TransconductanceΔI = ±2.5μA at COMP, FB1 = COMP125320600μS
FB1 Voltage GainFB1 to COMP1400V/V
LX1 Leakage CurrentVFB1 = 1.5V, VLX1 = 20V1025μA
LX1 Current LimitVFB1 = 1.1V, duty cycle = 25%2.83.33.8 A
Current-Sense Transresistance0.10.20.30V/A
LX1 On-Resistance80200mΩSoft-Start Period10msSoft-Start Step SizeILIM/
128A
POSITIVE AND NEGATIVE CHARGE-PUMP REGULATORS0°C < TA < +85°C1.231.251.27FBP Regulation VoltageTA = +25°C1.23751.2625V
FBP Line-Regulation Error11V < VSUP < 16V, not in dropout0.010.2%/V
FBP Input Bias CurrentVFBP = 1.5V, TA = +25°C-50+50nA
DRVP p-Channel MOSFET
On-Resistance2.04.0Ω
DRVP n-Channel MOSFET
On-Resistance0.81.5Ω
FBP Fault Trip Level Falling edge0.961.021.08VP osi ti ve C har g e- P um p S oft- S tar t P er i od 3.3msPositive Charge-Pump Soft-Start Step Size VREF/
128V0°C < TA < +85°C0.9851.0001.015 FBN Regulation Voltage VREF – VFBN TA = +25°C0.991.001.01V
FBN Input Bias CurrentVFBN = 250mV, TA = +25°C-50+50nA
FBN Line Regulation Error11V < VSUP < 16V, not in dropout0.010.2%/V
DRVN p-Channel On-Resistance2.04.0ΩDRVN n-Channel On-Resistance0.81.5Ω
FBN Fault Trip Level Rising edge450500550mV
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVs
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VVIN= VIN2= 12V, TA
= 0°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITSNegative Charge-Pump Soft-Start Period 2msNegative Charge-Pump Soft-Start Step Size ( V RE F - FB N /128V
AVDD SWITCHSWI Supply Range8.018.5V
SWI Overvoltage Fault ThresholdSWI rising edge, 300mV typical hysteresis (Note 2)18.5019.219.90V
SWI-SWO Switch Resistance120250mΩ
HIGH-VOLTAGE SWITCH ARRAYSRC Supply Range44V
SRC Supply Current250500μA
GON-to-SRC Switch On-ResistanceVDLP = 2V, CTL = VL1020ΩON - to- S RC S w i tch S atur ati on C ur r ent(VSRC - VGON) > 5V180390mA
GON-to-DRN Switch On-ResistanceVDLP = 2V, CTL = AGND2550Ω
GO N - to- D RN S w i tch S atur ati on C ur r ent(VGON - VDRN) > 5V40180mA
GON-to-GND Switch On-ResistanceDLP = AGND, VGON = 5V510kΩ
CTL Input Low Voltage0.6V
CTL Input High Voltage1.6V
CTL Input CurrentCTL = AGND or VL, TA = +25°C-1+1μATL- to- G ON Ri si ng P r op ag ati on D el ay1kΩ fr om D RN to GN D , C TL = AGN D to V L step , nooad on G ON , m easur ed fr om V C TL = 2V to GON = 20%100nsTL- to- GON Fal l i ng P r op ag ati on D el ay1kΩ fr om D RN to GN D , C TL = V L to AGN D step , no l oad
on GON , m easur ed fr om V C TL = 0.6V to GON = 80%200ns
MODE Switch On-Resistance1200Ω
Mode 1 Voltage ThresholdVMODE rising3.84.1V
MODE Capacitor Charge Current
(Mode 2)V M OD E = 1V 405065μAO 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 DRN1.151.251.35V
MODE Current-Source Stop
Voltage ThresholdMODE rising23V
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 Resistance1MΩ
DEL1, DEL2, DLP Charge CurrentVDEL1 = VDEL2 = VDLP = 1V789μADEL1, DEL2, DLP Turn-On Threshold1.21.251.32kV
DEL1, DEL2, DLP Discharge
Switch On-ResistanceEN1 = AGND or fault tripped10Ω
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVs
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VVIN= VIN2= 12V, TA
= 0°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS
FAULT DETECTION Duration to Trigger Fault 4555 65 ms
Duration to Restart After Fault 240 ms
Number of Restart Attempts
Before Shutdown 3 Times
Thermal-Shutdown Threshold 15°C typical hysteresis +160 °C
SWITCHING FREQUENCY SELECTION FSEL Input Low Voltage 450kHz 0.6 V
FSEL Input High Voltage 600kHz 1.6 V
FSEL Pulldown Resistance 1 M
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, VVIN= VIN2= 12V, TA
= -40°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.) (Note 3)
PARAMETERCONDITIONSMINTYPMAXUNITS
GENERALVIN + IN2 Input-Voltage Range8.516.5V
VIN + IN2 Shutdown CurrentEN1 = EN2 = AGND (shutdown)600μA
SWO Shutdown CurrentEN1 = EN2 = AGND (shutdown)2μA
FSEL = VIN510690SMPS Operating FrequencyFSEL = AGND390510kHz
VIN Undervoltage-Lockout ThresholdVIN rising edge, 100mV typical hysteresis5.757.25V
VL REGULATORVL Output VoltageIVL = 25mA, VFB1 = VFB2 = VFBP = 1.1V,
VFBN = 0.4V (all regulators switching)4.95.15V
VL Undervoltage-Lockout ThresholdVL rising edge, 100mV typical hysteresis3.64.5V
REFERENCEREF Output VoltageNo external load1.2351.265V
REF Load Regulation0 < ILOAD < 50μA10mV
RE F U nd er vol tag e- Lockout Thr eshol d Rising edge; 25mV typical hysteresis1.2V
STEP-DOWN REGULATOROUT Voltage in Fixed ModeFB2 = GND, no load (Note 1)3.253.35V
FB2 Voltage in Adjustable ModeVOUT = 2.5V, no load (Note 1)1.231.27V
FB2 Adjustable-Mode
Threshold VoltageDual-mode comparator0.100.20V
Output-Voltage Adjust RangeStep-down output1.55.0V
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVs
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VVIN= VIN2= 12V, TA
= -40°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.) (Note 3)
PARAMETERCONDITIONSMINTYPMAXUNITSLX2-to-IN2 nMOS Switch
On-Resistance200mΩ
LX2-to-CPGND nMOS Switch
On-Resistance725Ω
BS T- to- V L p M O S S w i tch On- Resi stance725Ω
LX2 Positive Current Limit2.503.50A
Maximum Duty Factor6590%FB2 Power-Good Threshold FB2 rising 0.94 1.06 VPGOOD Output Low Voltage IPGOOD = 1mA 0.3 VCRST Charge Current VCRST = 1V 0.8 1.2 μACRST Voltage Threshold 1.2 1.3 VCRST Pulldown Resistance VCRST = 1V 300 Ω
STEP-UP REGULATOROutput-Voltage Range VVIN 18 V
Oscillator Maximum Duty Cycle6590%
FB1 Regulation VoltageFB1 = COMP, CCOMP = 1nF1.2251.275V
LX1 Current LimitVFB1 = 1.1V, duty cycle = 25%3.24.2A
Current-Sense Transresistance0.100.30V/A
LX1 On-Resistance200mΩ
POSITIVE AND NEGATIVE CHARGE-PUMP REGULATORSFBP Regulation Voltage1.231.27V
DRVP p-Channel MOSFET
On-Resistance4Ω
DRVP n-Channel MOSFET
On-Resistance1.5Ω
FBN Regulation VoltageVREF - VFBN0.9851.015V
DRVN p-Channel On-Resistance3ΩDRVN n-Channel On-Resistance1.5Ω
AVDD SWITCHSWI Supply Range8.018.5V
SWI Overvoltage Fault ThresholdVSWI = rising, 300mV typical hysteresis (Note 3)18.519.9V
SWI-SWO Switch Resistance360mΩ
HIGH-VOLTAGE SWITCH ARRAYSRC Supply Range44V
GON-to-SRC Switch On-ResistanceVDLP = 2V, CTL = VL20Ω
GON-to-DRN Switch On-ResistanceVDLP = 2V, CTL = AGND50Ω
GON-to-GND Switch On-ResistanceDLP = AGND, VGON = 5V2.510kΩ
CTL Input Low Voltage0.6V
CTL Input High Voltage1.6V
Mode 1 Voltage ThresholdVMODE rising edge4.1V
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVs
Note 1: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 2:Disables boost switching if either SUP, SWI, or OVIN exceeds the threshold. Switching resumes when no threshold is exceeded.
Note 3:Specifications to TA= -40°C are guaranteed by design, not production tested.
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VVIN= VIN2= 12V, TA
= -40°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.) (Note 3)
PARAMETERCONDITIONSMINTYPMAXUNITS MODE Voltage Threshold for Enabling
DRN Switch Control in Mode 2 GON connects to DRN 1.15 1.35 V
MODE Current-Source Stop Voltage
Threshold MODErising 2 3 V
THR-to-GON Voltage Gain 9.4 10.6 V/V
SEQUENCE CONTROL EN1, EN2 Input Low Voltage 0.6 V
EN1, EN2 Input High Voltage 1.6 V
SWITCHING FREQUENCY SELECTION FSEL Input Low Voltage 600kHz 0.6 V
FSEL Input High Voltage 1.2MHz 1.6 V
Typical Operating Characteristics(Circuit of Figure 1. VIN= VINL= VSUPP= 12V, AVDD= 16V, VGON= 34.5V, VGOFF= -6V, VOUT1= 3.3V, TA= +25°C, unless other-
wise noted.)
STEP-DOWN REGULATOR EFFICIENCY
vs. LOAD CURRENT
LOAD CURRENT (A)
EFFICIENCY (%)0.10
MAX17113 toc01
EN1 = VL, EN2 = VL
EN1 = VL, EN2 = GND
STEP-DOWN REGULATOR OUTPUT
VOLTAGE vs. LOAD CURRENT
LOAD CURRENT (A)
OUTPUT-VOLTAGE ERROR (%)
MAX17113 toc02
EN2 = VL
EN2 = GND
STEP-DOWN REGULATOR
LOAD-TRANSIENT RESPONSE
MAX17113 toc03
50mA
3.3V
IOUT
2A/div
VOUT
200mV/div
AC-COUPLED
INDUCTOR
CURRENT
2A/div
20Fs/div
L = 4.7FH
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVsypical Operating Characteristics (continued)(Circuit of Figure 1. VIN= VINL= VSUPP= 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)
MAX17113 toc04
VIN
5V/div
VOUT
2V/div
3.3V
VLX2
10V/div
INDUCTOR
CURRENT
500mA/div
2ms/div
STEP-UP REGULATOR EFFICIENCY
vs. LOAD CURRENT
LOAD CURRENT (A)
EFFICIENCY (%)0.1
MAX17113 toc05
STEP-UP REGULATOR
OUTPUT VOLTAGE vs. LOAD CURRENT
LOAD CURRENT(A)
OUTPUT-VOLTAGE ERROR (%)
MAX17113 toc06
STEP-DOWN REGULATOR
SOFT-START (HEAVY LOAD)
MAX17113 toc07
EN2
5V/div
VAVDD
10V/div
INDUCTOR
CURRENT
1A/div
DEL2
5V/div
VSRC
20V/div
10ms/div
STEP-UP REGULATOR
LOAD-TRANSIENT RESPONSE
MAX17113 toc08
INDUCTOR
CURRENT
2A/div0A
LOAD
CURRENT
1A/div
RCOMP = 50.5kI
CCOMP = 330pF
VAVDD
500mV/div
100mA
100Fs/div
STEP-UP REGULATOR PULSED
LOAD-TRANSIENT RESPONSE
MAX17113 toc09
16V
INDUCTOR
CURRENT
2A/div0A
LOAD
CURRENT
2A/div
VAVDD
200mV/div
0.2A
10Fs/div
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVsSTEP-UP REGULATOR CURRENT LIMIT
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
STEP-UP REGULATOR
CURRENT LIMIT (A)1211109
MAX17113 toc10
L1 = 10FH
TIME-DELAY LATCH
RESPONSE TO OVERLOAD
MAX17113 toc11
VOUT
5V/div
VAVDD
10V/div
VGON
50V/div
VGOFF
50V/div
L2 INDUCTOR
CURRENT
5A/div
200ms/div
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
VIN (V)
SWITCHING FREQUENCY (kHz) 1211109
MAX17113 toc12
VL LOAD REGULATIONLOAD CURRENT (mA)
OUTPUT-VOLTAGE ERROR (%)604020100
MAX17113 toc13
NORMALIZED REFERENCE VOLTAGE
LOAD REGULATIONOUTPUT-VOLTAGE ERROR (%)
MAX17113 toc14
POSITIVE CHARGE-PUMP REGULATOR
NORMALIZED LINE REGULATION
VIN (V)
POSITIVE CHARGE-PUMP
OUTPUT-VOLTAGE ERROR161514131211
MAX17113 toc15
ISRC = 0A
ISRC = 25mA
ypical Operating Characteristics (continued)(Circuit of Figure 1. VIN= VINL= VSUPP= 12V, AVDD= 16V, VGON= 34.5V, VGOFF= -6V, VOUT1= 3.3V, TA= +25°C, unless other-
wise noted.)
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVsypical Operating Characteristics (continued)(Circuit of Figure 1. VIN= VINL= VSUPP= 12V, AVDD= 16V, VGON= 34.5V, VGOFF= -6V, VOUT1= 3.3V, TA= +25°C, unless other-
wise noted.)
POSITIVE CHARGE-PUMP REGULATOR
NORMALIZED LOAD REGULATIONLOAD CURRENT (mA)
OUTPUT-VOLTAGE ERROR (%)
MAX17113 toc16
POSITIVE CHARGE-PUMP REGULATOR
LOAD-TRANSIENT RESPONSE
MAX17113 toc17
70mA
10mA
VSRC
500mV/div
LOAD
CURRENT
20mA/div
34.8V
100Fs/div
NEGATIVE CHARGE-PUMP REGULATOR
NORMALIZED LINE REGULATION
VIN (V)
OUTPUT-VOLTAGE ERROR (%)1413121110
MAX17113 toc18
NEGATIVE CHARGE-PUMP REGULATOR
NORMALIZED LOAD REGULATIONLOAD CURRENT (mA)
OUTPUT-VOLTAGE ERROR (%)
MAX17113 toc19
NEGATIVE CHARGE-PUMP REGULATOR
LOAD-TRANSIENT RESPONSE
MAX17113 toc20
110mA
10mA
VGOFF
200mV/div
LOAD
CURRENT
50mA/div
-6V
100Fs/div
POWER-UP SEQUENCE
MAX17113 toc21
VEN1
5V/divVOUT
5V/divVDEL1
5V/divVGOFF
5V/divVAVDD
10V/div
VDEL2
5V/div
VSRC
20V/div
20ms/div
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVsypical Operating Characteristics (continued)(Circuit of Figure 1. VIN= VINL= VSUPP= 12V, AVDD= 16V, VGON= 34.5V, VGOFF= -6V, VOUT1= 3.3V, TA= +25°C, unless other-
wise noted.)
POWER-GOOD FUNCTION
MAX17113 toc22
VOUT
1V/div
VCRST
1V/div
VIN
5V/divVPGOOD
5V/div
4ms/div
VIN SUPPLY CURRENT vs. VIN VOLTAGE
VIN VOLTAGE (V)
VIN SUPPLY CURRENT (mA)1514131211109
MAX17113 toc23
EN1 = EN2 = VL
EN1 = EN2 = GND3510-15-4085
TEMPERATURE (NC)
VIN SUPPLY CURRENT (mA)
VIN SUPPLY CURRENT
vs. TEMPERATUREMAX17113 toc24
EN1 = VL, EN2 = GND
EN1 = EN2 = GND
HIGH-VOLTAGE SWITCH
CONTROL FUNCTION (MODE 1)
MAX17113 toc25
VCTL
5V/div
VMODE
5V/div
VGON
10V/div
4Fs/divRDRN = 1kI
CGON = 0.1FF
HIGH-VOLTAGE SWITCH
CONTROL FUNCTION (MODE 2)
MAX17113 toc26
VCTL
5V/div
VMODE
2V/div
VGON
10V/div
4ms/divRDRN = 1kI
CGON = 0.1FF
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVs
Pin Description
PINNAMEFUNCTIONTHR
GON Low-Level Regulation Set-Point Input. Connects THR to the center of a resistive voltage-divider
between AVDD and GND to set the VGON falling regulation level. The actual level is 10 × VTHR. See the
High-Voltage Switch Control section for details.DRVPPositive Charge-Pump Driver Output. Connects DRVP to the positive charge-pump flying capacitor(s).GND2Internal Buck LSS Power GroundSRCSwitch Input. Source of the internal high-voltage p-channel MOSFET between SRC and GON.GONInternal High-Voltage MOSFET Switch Common Terminal. GON is the output of the high-voltage switch-
control block.DRNSwitch Input. Drain of the internal high-voltage p-channel MOSFET connected to GON.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 10Ω resistor for 0.1μs (typ) when the high-voltage switch-control block
is enabled.DLPGON Output Enable. See the High-Voltage Switch Control section for details.FBP
Positive Charge-Pump Regulator Feedback Input. Connects FBP to the center of a resistive voltage-
divider between the positive charge-pump regulator output and AGND to set the positive charge-pump
regulator output voltage. Place the resistive voltage-divider within 5mm of FBP.CPGNDCharge Pump and Internal Step-Down Regulator Pulldown Switch Power GroundCTLHigh-Voltage Switch-Control Block Timing Control Input. See the High-Voltage Switch Control sectionDRVNN eg ati ve C har g e- P um p D r i ver Outp ut. C onnects D RV N to the neg ati ve char g e- p um p fl yi ng cap aci tor ( s) .
13, 40AGNDAnalog GroundFBN
Negative Charge-Pump Regulator Feedback Input. Connects 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.REFReference Output. Connects a 0.22μF capacitor from REF to AGND. All power outputs are disabled
until REF exceeds its UVLO threshold. REF is active whenever VIN is above its UVLO threshold.DEL1eg ati ve C har g e- P um p D el ay Inp ut. C onnects a cap aci tor fr om D E L1 and AGN D to set the d el ay ti m eetw een the step - d ow n outp ut and the neg ati ve outp ut. An 8μ A cur r ent sour ce char g es C D E L 1. D E L1 i snter nal l y p ul l ed to AGN D thr oug h 10Ω r esi stance w hen E N 1 i s l ow or V L i s b el ow i ts U V LO thr eshol d .FB2
Step-Down Regulator Feedback Input. Connects 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.BSTStep-Down Regulator Bootstrap Capacitor Connection for High-Side Gate Driver. Connects a 0.1μF
ceramic capacitor from BST to LX2.
19, 20LX2
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 to both LX2 pins to minimize the
trace area for low EMI.OUTStep-Down Regulator Output-Voltage Sense Input. Connects OUT to the step-down regulator output.
22, 23IN2Step-Down Regulator Power Input. Drain of the internal n-channel MOSFET connected between IN2 and
LX2.VINInput of the Internal 5V Linear Regulator and the Startup Circuitry. Bypass VIN to AGND with 0.22μF
close to the IC.
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVs
Pin Description (continued)
PINNAMEFUNCTION25 FSEL Frequency Select Pin. Connect FSEL to AGND for 450kHz operation. Connect to VL or VIN for 600kHz
operation.
26 EN1 Step-Down and Negative Charge-Pump Regulator Enable Input. Input high also enables DLY1 pullup
current.
27 DEL2
Step-Up Regulator and Positive Charge-Pump Delay Input. Connects a capacitor from DEL2 and
AGND 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 AGND through 10 resistance when EN1
or EN2 is low or when VL is below its UVLO threshold.
28 VL
5V Internal Linear Regulator Output. Bypass VL to AGND with 1F 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 its UVLO threshold.
29 EN2 Step-Up and Positive Charge-Pump Regulator Enable Input. Input high also enables DLY2 pullup
current. EN2 is inactive when EN1 is low.
30, 31 PGND Step-Up Regulator Power Ground. Source of the internal power n-channel MOSFET.
32, 33 LX1 Step-Up Regulator Power MOSFET n-Channel Drain and Switching Node. Connects the inductor and
Schottky catch diode to both LX1 pins and minimize the trace area for the lowest EMI.
34 SWI Step-Up Regulator Internal PMOS Pass Switch Source Input. Connects to the anode of the step-up
regulator Schottky catch diode.
35 SWO Step-Up Regulator Internal pMOS Pass Switch Drain Output
36 FB1
Boost Regulator Feedback Input. Connects FB1 to the center of a resistive voltage-divider between
the boost regulator output and AGND to set the boost regulator output voltage. Place the resistive
voltage-divider within 5mm of FB1.
37 COMP Compensation Pin for the Step-Up Error Amplifier. Connects a series resistor and capacitor from
COMP to AGND.
38 PGOOD Open-Drain Power-Good Output. Monitors the step-down output voltage.
39 CRST Power-Good Reset Timing Pin. Connects a capacitor from CRST to AGND to set the step-down
output-rising PGOOD delay. EP Exposed Pad = AGND
MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVsLX2
REF
FB1
LX1LX1
AGND
COMP
VIN
12V
OUT
3.3V
AVDD
16V
1.5A
FSEL
FB2
OUT
STEP-DOWN, NEGATIVE
ON/OFF
VINVIN
GON
35V
100mA
AGND
REF
BST
GON
DRN
CTLFROM GON
CONTROL
DRVN
FBN
REF
DRVP
FBPCPGND
SRC
PGNDPGND
4.7μH
10μF
2.4μHD2
1μF
0.1μF
0.1μF
DEL2
DEL1
EN1
EN2
SWI
SWO
THR
DLP
MODE
10μF
10μF313233
1kΩ
PGOODPGOOD38
CRST39
SRC
0.22μF
0.22μF0.22μF
AVDD91014
IN2IN222
0.1μF
LX2
GND2
STEP-UP, POSITIVE
CHARGE PUMP ON/OFF
GOFF
-6V
100mA
MAX17113
1μF
0.22μF
0.1μF
0.15μF
0.15μF
22μF
1μF
330pF100kΩ
33.3kΩ
2.2kΩ
3.3V
367kΩ
13.3kΩ
158kΩ
13.3kΩ
150kΩ
23kΩ
C24
10μF
C15, C16
10μF
