MAX17075ETG+T ,Boost-Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op AmpFeaturesThe MAX17075 includes a high-voltage boost regulator, ♦ 2.5V to 5.5V Input Operating Rangeo ..
MAX17079GTL+ ,4-Level or 2-Level Logic to High-Voltage Level Shifter for TFT LCD TV DisplayELECTRICAL CHARACTERISTICS(Circuit of Figure 1, V = 3.3V, V = 15V, V = 10V, V = 7V, V = 6V, V = 5V, ..
MAX17079GTL+T ,4-Level or 2-Level Logic to High-Voltage Level Shifter for TFT LCD TV DisplayFeatures♦ 7-Channel Logic-Level Input to High-VoltageThe MAX17079 is a 7-channel logic-level input ..
MAX17079GTL+TCAZ ,4-Level or 2-Level Logic to High-Voltage Level Shifter for TFT LCD TV DisplayApplicationsVCC VH1 VH2 VCOM VL2 VL1 VLSTFT LCD TV PanelsOA1Pin Configuration OB1A1OA2TOP VIEWB1OB2 ..
MAX1707ETG , Light-Management IC with Efficient 1x/1.5x/2x Charge Pump for Backlight/Flash/RGB LEDs
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MAX4526CSA ,Phase-Reversal Analog SwitchesGeneral Description ________
MAX4526CUA+ ,Phase-Reversal Analog SwitchesELECTRICAL CHARACTERISTICS—±15V Supplies(V+ = +15V, V- = -15V, V = 2.4V, V = 0.8V, T = T to T , unl ..
MAX4526ESA ,Phase-Reversal Analog SwitchesELECTRICAL CHARACTERISTICS—±15V Supplies(V+ = +15V, V- = -15V, V = 2.4V, V = 0.8V, T = T to T , unl ..
MAX4526EUA ,Phase-Reversal Analog Switchesapplications, such as chop-per amplifiers, while the MAX4527 is optimized for ' 175Ω Signal Paths w ..
MAX4526EUA+ ,Phase-Reversal Analog SwitchesApplicationsMAX4526CPA 0°C to +70°C 8 Plastic DIPChopper-Stabilized AmplifiersMAX4526CSA 0°C to +70 ..
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MAX17075ETG+-MAX17075ETG+T
Boost-Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op AmpEVALUATION KIT AVAILABLE
General DescriptionThe MAX17075 includes a high-voltage boost regulator,
one high-current operational amplifier, two regulated
charge pumps, and one MLG block for gate-driver
supply modulation.
The step-up DC-DC converter is a 1.2MHz current-
mode boost regulator with a built-in power MOSFET. It
provides fast load-transient response to pulsed loads
while producing efficiencies over 85%. The built-in
160mΩ(typ) power MOSFET allows output voltages as
high as 18V boosted from inputs ranging from 2.5V to
5.5V. A built-in 7-bit digital soft-start function controls
startup inrush currents.
The gate-on and gate-off charge pumps provide regu-
lated TFT gate-on and gate-off supplies. Both output
voltages can be adjusted with external resistive
voltage-dividers.
The operational amplifier, typically used to drive the
LCD backplane (VCOM), features high-output short-cir-
cuit current (±500mA), fast slew-rate (45V/µs), wide
bandwidth (20MHz), and rail-to-rail outputs.
The MAX17075 is available in a 24-pin thin QFN pack-
age with 0.5mm lead spacing. The package is a square
(4mm x 4mm) with a maximum thickness of 0.8mm for
ultra-thin LCD design. It operates over the -40°C to
+105°C temperature range.
ApplicationsNotebook Computer Displays
LCD Monitor Panels
LCD TVs
Features2.5V to 5.5V Input Operating RangeCurrent Mode Step-Up Regulator
Fast-Transient Response
Built-In 20V, 3A, 0.16Ωn-Channel Power MOSFET
Cycle-by-Cycle Current Limit
87% Efficiency (5V Input to 13V Output)
1.2MHz Switching Frequency
±1% Output Voltage Regulation AccuracyHigh-Current 18V VCOM Buffer
±500mA Output Short-Circuit Current
45V/µs Slew Rate
20MHz -3dB Bandwidth
Rail-to-Rail OutputRegulated Charge Pump for TFT Gate-On SupplyRegulated Charge Pump for TFT Gate-Off SupplyLogic-Controlled High-Voltage Switches with
Adjustable DelaySoft-Start and Timed Delay Fault Latch for All
OutputsOverload and Thermal Protection
Ordering InformationMAX17075
AGND
VCC
BGND
DRVN
REF
FBN
POS
NEG
OUT
PGND
RSTIN
COMP
DRN
RST
COM
SRC
DRVP
FBP
SUPCTLEPDEL
10Ω
1µF
VAVDD
TO VCOM
BGND
VIN
2.5V TO 5.5V
VGON
VGOFF
FROM
SYSTEM
3.3V
VIN
VMAIN
FROM
TCON
Simplified Operating Circuit
PARTTEMP RANGEPIN-PACKAGEMAX17075ETG+-40°C to +85°C24 TQFN-EP*
MAX17075GTG/V+-40°C to +105°C24 TQFN-EP*
*EP = Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VVCC= +5V, Circuit of Figure 1, VAVDD= VSUP= +13V, TA
= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
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.
VCC, CTL, RSTIN, RST to AGND..........................-0.3V to +7.5V
DEL, REF, COMP, FB, FBN,
FBP to AGND.......................................-0.3V to (VVCC+ 0.3V)
PGND, BGND to AGND.........................................-0.3V to +0.3V
LX to PGND............................................................-0.3V to +20V
SUP to PGND.........................................................-0.3V to +20V
DRVN, DRVP to PGND..............................-0.3V to (VSUP+ 0.3V)
SRC, COM, DRN to AGND.....................................-0.3V to +40V
DRN to COM............................................................-30V to +30V
SRC to SUP............................................................................23V
REF Short Circuit to AGND.........................................Continuous
POS, NEG, OUT to AGND...........................-0.3V to (VSUP + 0.3)
DRVN, DRVP RMS Current...............................................200mA
LX, PGND RMS Current Rating.............................................2.4A
Continuous Power Dissipation (TA= +70°C)
24-Pin TQFN (derate 27.8mW/°C above +70°C).......2222mW
Operating Temperature Range, E Grade............-40°C to +85°C
Operating Temperature Range, G Grade.........-40°C to +105°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10s).................................+300°C
Soldering Temperature (reflow).......................................+260°C
PARAMETERCONDITIONSMINTYPMAXUNITS VCC Input Supply Range 2.5 5.5 V
VCC Undervoltage-Lockout (UVLO) Threshold VCC rising, hysteresis (typ) = 50mV 2.05 2.25 2.45 V
VCC Shutdown Current VCC = 2V 100 200 µA
VFB = 1.3V, not switching 1 1.5 VCC Quiescent Current VFB = 1.0V, switching 4 5 mA
REFERENCE REF Output Voltage No external load 1.238 1.250 1.262 V
REF Load Regulation 0n < ILOAD < 50µA 6 mV
REF Sink Current In regulation 10 µA
REF Undervoltage-Lockout Threshold Rising edge, hysteresis (typ) = 200mV 1 1.17 V
OSCILLATOR AND TIMINGFrequency 1000 1200 1400 kHz
Oscillator Maximum Duty Cycle 87 90 93 %
Duration to Trigger Fault Condition FB or FBP or FBN below threshold 47 55 65 ms
DEL Capacitor Charge Current During startup, VDEL = 1.0V 4 5 6 µA
DEL Turn-On Threshold 1.19 1.25 1.31 V
DEL Discharge Switch On-Resistance 20
STEP-UP REGULATOROutput Voltage Range VVCC 18 V
FB Regulation Voltage FB = COMP, CCOMP = 1nF 1.238 1.250 1.262 V
FB Fault Trip Level Falling edge 0.96 1 1.04 V
FB Load Regulation 0 < ILOAD < full, transient only -1 %
FB Line Regulation VCC = 2.5V to 5.5V -0.2 0 +0.2 %/V
FB Input Bias Current VFB = 1.25V 50 125 200 nA
FB Transconductance I = ±2.5µA at COMP, FB = COMP 75 160 280 µS
FB Voltage Gain FB to COMP 2600 V/V
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
PARAMETERCONDITIONSMINTYPMAXUNITS LX Current Limit VFB = 1.1V, duty cycle = 75% 2.5 3.0 3.5 A
LX On-Resistance ILX = 200mA 0.16 0.25
LX Leakage Current VLX = 19V, TA = +25°C 10 20 µA
Current-Sense Transresistance 0.1 0.2 0.3 V/A
Soft-Start Period 7-bit current ramp 14 ms
POSITIVE CHARGE-PUMP REGULATOR VSUP Input Supply Range 6 18 V
VSUP Overvoltage Threshold VSUP = rising, hysteresis = 200mV 19 20 21 V
Operating Frequency 0.5 x
fOSC Hz
FBP Regulation Voltage -1.5% 1.250 +1.5% V
FBP Line Regulation Error VSUP = 12V to 18V, VGON = 30V 0.2 %/V
FBP Input Bias Current VFBP = 1.5V, TA = +25°C -50 +50 nA
DRVP Current Limit Not in dropout 400 mA
DRVP PCH On-Resistance 4 6
DRVP NCH On-Resistance 1.5 3
FBP Fault Trip Level Falling edge 0.96 1 1.04 V
Positive Charge-Pump Soft-Start Period 7-bit voltage ramp with filtering to prevent
high peak currents 3 5 ms
NEGATIVE CHARGE-PUMP REGULATORVSUP Input Supply Range 6 18 V
Operating Frequency 0.5 x
fOSC Hz
FBN Regulation Voltage (VREF - VFBN) VREF - VFBN = 1V -1.5% 1 +1.5% V
FBN Input Bias Current VFBN = 0V, TA = +25°C -50 +50 nA
FBN Line Regulation Error VSUP = 9V to 18V, VGOFF = -7V 0.2 %/V
DRVN PCH On-Resistance 4 6
DRVN NCH On-Resistance 1.5 3
DRVN Current Limit Not in dropout 400 mA
FBN Fault Trip level Rising edge 450 mV
Negative Charge-Pump Soft-Start Period 7-bit voltage ramp with filtering to prevent
high peak currents 3 5 ms
POSITIVE GATE DRIVER TIMING AND CONTROL SWITCHESCTL Input Low Voltage 0.6 V
CTL Input High Voltage 2 V
CTL Input Current VCTL = 0V or VVCC, TA = +25°C -1 +1 µA
CTL-to-COM Rising Propagation Delay CLOAD = 100pF 250 ns
SRC Input Voltage Range 36 V
ELECTRICAL CHARACTERISTICS (continued)(VVCC= +5V, Circuit of Figure 1, VAVDD= VSUP= +13V, TA
= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
ELECTRICAL CHARACTERISTICS (continued)(VVCC= +5V, Circuit of Figure 1, VAVDD= VSUP= +13V, TA
= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERCONDITIONSMINTYPMAXUNITSDRN-to-COM Switch On-ResistanceVDEL = 1.5V, CTL = AGND3060Ω
COM-to-GND PulldownVDEL = 0V1.52.5kΩ
VDEL = 1.5V, CTL = VCC300600SRC Input CurrentVDEL = 1.5V, CTL = AGND200360µA
OPERATIONAL AMPLIFIERSSUP Supply Range618V
VSUP Undervoltage Threshold3.844.2V
SUP Supply CurrentBuffer confi g ur ati on, V P OS = V S U P /2, no l oad 46.5mA
Input Offset VoltageVNEG, VPOS = VSUP/212mV
Input Bias CurrentVNEG, VPOS = VSUP/2, TA = +25°C-1+1µA
Input Common-Mode Voltage Range0VSUPV
Input Common-Mode Rejection Ratio80dB
Output-Voltage-Swing HighIOUT = 50mAVSUP -
350mVOutput-Voltage-Swing LowIOUT = -50mA350mV
Large-Signal Voltage GainVOUT = 1V to (VSUP - 1)V80dB
Slew Rate45V/µs
-3dB Bandwidth20MHz
Sourcing500Short-Circuit CurrentSinking500mA
XAO CONTROLFalling edge at VCC = 5V1.2251.2501.275RSTIN ThresholdFalling edge at VCC = 1.8V1.2131.2501.287V
RSTIN Input CurrentTA = +25°C-1+1µA
RSTIN Hysteresis50mV
RST Output VoltageISINK = 1mA0.4V
RST Blanking TimeCounting from VVCC crossing 2.25V160220280ms
XAO UVLOVVCC rising with hysteresis of 50mV1.51.7V
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
ELECTRICAL CHARACTERISTICS(VCC= +5V, Circuit of Figure 1, VAVDD= VSUP= +13V, TA
= -40°C to +105°C, unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITSVCC Input Supply Range2.55.5V
VCC Undervoltage-Lockout ThresholdVCC rising, hysteresis (typ) = 50mV2.052.45V
VCC Shutdown Current200µA
VFB = 1.3V, not switching1.5VCC Quiescent CurrentVFB = 1.0V, switching5mA
REFERENCEREF Output VoltageNo external load1.2301.267V
REF Load Regulation0 < ILOAD < 50µA6mV
REF Sink CurrentIn regulation10µA
REF Undervoltage-Lockout ThresholdRising edge, hysteresis (typ) = 200mV1.17V
OSCILLATOR AND TIMINGFrequency10001400kHz
Oscillator Maximum Duty Cycle8694%
Duration to Trigger Fault ConditionFB or FBP or FBN below threshold4765ms
DEL Capacitor Charge CurrentDuring startup, VDEL = 1.0V46µA
DEL Turn-On Threshold1.191.31V
STEP-UP REGULATOROutput Voltage RangeVIN18V
FB Regulation VoltageFB = COMP, CCOMP = 1nF1.2301.267V
FB Fault Trip LevelFalling edge0.961.04V
FB Line RegulationVCC = 2.5V to 5.5V-0.25+0.25%/V
FB Input Bias CurrentVFB = 1.25V50200nA
FB Transconductance∆I = ±2.5µA at COMP, FB = COMP75280µS
LX Current LimitVFB = 1.1V, duty cycle = 75%2.53.5A
LX On-ResistanceILX = 200mA0.25Ω
Current-Sense Transresistance0.100.30V/A
POSITIVE CHARGE-PUMP REGULATORVSUP Input Supply Range618V
VSUP Overvoltage ThresholdVSUP = rising, hysteresis = 200mV1921V
FBP Regulation Voltage-2%1.25+2%V
FBP Line Regulation ErrorVSUP = 8V to 18V, VGON = 30V0.2%/V
FBP Input Bias CurrentVFBP = 1.5V, TA = +25°C-50+50nA
DRVP PCH On-Resistance6Ω
DRVP NCH On-Resistance3Ω
FBP Fault Trip Level Falling edge0.961.04VPositive Charge-Pump Soft-Start Period 7-bit voltage ramp with filtering to prevent
high peak currents5ms
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
ELECTRICAL CHARACTERISTICS (continued)(VCC= +5V, Circuit of Figure 1, VAVDD= VSUP= +13V, TA
= -40°C to +105°C, unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
NEGATIVE CHARGE-PUMP REGULATORVSUP Input Supply Range618V
FBN Regulation Voltage (VREF - VFBN)VREF - VFBN = 1V-2%1+2%V
FBN Input Bias CurrentVFBN = 0V, TA = +25°C-50+50nA
FBN Line Regulation ErrorVSUP = 9V to 18V, VGOFF = -7V0.2%/V
DRVN PCH On-Resistance6ΩDRVN NCH On-Resistance3ΩNegative Charge-Pump Soft-Start Period 7-bit voltage ramp with filtering to prevent
high peak currents5ms
POSITIVE GATE-DRIVER TIMING AND CONTROL SWITCHESCTL Input Low Voltage0.6V
CTL Input High Voltage2V
CTL Input CurrentVCTL = 0V or VVCC, TA = +25°C-1+1µA
SRC Input Voltage Range36V
SRC-to-COM Switch On-ResistanceVDEL = 1.5V, CTL = VCC10Ω
DRN-to-COM Switch On-ResistanceVDEL = 1.5V, CTL = AGND60Ω
COM-to-GND PulldownVDEL = 0V1.52.5kΩ
VDEL = 1.5V, CTL = VCC600µASRC Input CurrentVDEL = 1.5V, CTL = AGND360µA
OPERATIONAL AMPLIFIERSSUP Supply Range618V
VSUP Undervoltage Threshold3.844.2V
SUP Supply CurrentBuffer confi g ur ati on, V P OS = V S U P /2, no l oad 6.5mA
Input Offset VoltageVNEG, VPOS = VSUP/212mV
Input Bias CurrentVNEG, VPOS = VSUP/2, TA = +25°C-1+1µA
Input Common-Mode Voltage Range0VSUPV
Output-Voltage-Swing HighIOUT = 50mAVSUP -
350mVOutput-Voltage-Swing LowIOUT = -50mA350mV
Sourcing500Short-Circuit CurrentSinking500mA
XAO CONTROLRSTIN ThresholdFalling edge1.221.28V
RSTIN Input CurrentTA = +25°C-1+1µA
RST Output VoltageISINK = 1mA0.4V
RST Blanking TimeCounting from VVCC crossing 2.25V160280ms
XAO UVLOVCC rising with typical hysteresis of 50mV1.7V
Note 1:All devices are 100% tested at +25°C. Limits over temperature are guaranteed by design.
STEP-UP REGULATOR EFFICIENCY
vs. LOAD CURRENTMAX17075 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)
VIN = 5V
VIN = 3.3V
VIN = 2.5V
STEP-UP REGULATOR OUTPUT VOLTAGE
vs. LOAD CURRENTMAX17075 toc02
LOAD CURRENT (mA)
OUTPUT ERROR (%)
STEP-UP REGULATOR LINE REGULATION
UNDER DIFFERENT LOADS
MAX17075 toc03
INPUT VOLTAGE (V)
OUTPUT ERROR (%)
300mA LOAD
100mA LOAD
200mA LOAD
LOAD
STEP-UP REGULATOR SWITCHING
FREQUENCY vs. INPUT VOLTAGEMAX17075 toc04
INPUT VOLTAGE (V)
SWITCHING FREQUENCY (MHz)
150mA LOAD
STEP-UP REGULATOR STARTUP
WITH HEAVY LOAD (600mA) MAX17075 toc05
2ms/div
VIN
5V/div
VAVDD
5V/div
10V/div
1A/div
STEP-UP REGULATOR LOAD-TRANSIENT
RESPONSE (100mA TO 800mA) MAX17075 toc06
40µs/divRCOMP = 82kΩ
CCOMP1 = 220pFVAVDD
(AC-COUPLED)
500mV/div
LOAD CURRENT
500mA/div
2A/div
MAX17075 toc07
STEP-UP REGULATOR PULSED
LOAD-TRANSIENT RESPONSE (80mA TO 2.08mA) 10µs/divRCOMP = 82kΩ
CCOMP1 = 220pF
VAVDD
(AC-COUPLED)
500mV/div
LOAD CURRENT
1A/div
2A/div
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
Typical Operating Characteristics(TA = +25°C, unless otherwise noted.)
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
IN SUPPLY QUIESCENT CURRENT
vs. IN SUPPLY VOLTAGEMAX17075 toc08
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
200mA LOAD
NO SWITCHING
MAX17075 toc09
POWER-UP SEQUENCE OF
ALL SUPPLY OUTPUTS4ms/divVIN : 5V/div
REF : 1V/div
AVDD : 10V/div
VCOM : 5V/div
SRC : 20V/div
GOFF : 5V/div
GON : 20V/div
DEL : 2V/div
VIN
AVDD
VCOMSRC
REF
DEL
GOFF
GON
POSITIVE CHARGE-PUMP REGULATOR
LINE REGULATIONMAX17075 toc10
SUPPLY VOLTAGE (V)
OUTPUT ERROR (%)1617121314
POSITIVE CHARGE-PUMP REGULATOR
LOAD REGULATION
MAX17075 toc11
LOAD CURRENT (mA)
OUTPUT ERROR (%)507060102030
VSRC
GON
MAX17075 toc12
POSITIVE CHARGE-PUMP REGULATOR
LOAD-TRANSIENT RESPONSE (10mA TO 100mA)4µs/div
GON
(AC-COUPLED)200mV/div
LOAD CURRENT
50mA/div
NEGATIVE CHARGE-PUMP REGULATOR
LINE REGULATIONMAX17075 toc13
OUTPUT ERROR (%)
NEGATIVE CHARGE-PUMP REGULATOR
LOAD REGULATION
MAX17075 toc14
OUTPUT ERROR (%)2040
NEGATIVE CHARGE-PUMP REGULATOR
LOAD-TRANSIENT RESPONSE (10mA TO 100mA)
MAX17075 toc15
4µs/div
GOFF
(AC-COUPLED)
100mV/div
LOAD CURRENT
50mA/div
Typical Operating Characteristics (continued)(TA = +25°C, unless otherwise noted.)
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
OPERATION AMPLIFIER
FREQUENCY RESPONSEMAX17075 toc16
FREQUENCY (kHz)
GAIN (dB)10k
100100k
100pF LOAD
NO LOAD
OPERATIONAL AMPLIFIER RAIL-TO-RAIL
INPUT/OUPUT WAVEFORMS MAX17075 toc17
2µs/div
VPOS
5V/div
VVCOM
5V/div
OPERATIONAL AMPLIFIER
LOAD-TRANSIENT RESPONSE MAX17075 toc18
2µs/div
VVCOM
(AC-COUPLED)
200mV/div
IVCOM
50mV/div0A
OPERATIONAL AMPLIFIER
LARGE-SIGNAL STEP RESPONSE MAX17075 toc19
40µs/div
VPOS
5V/div
VVCOM
5V/div
OPERATIONAL AMPLIFIER
SMALL-SIGNAL STEP RESPONSE MAX17075 toc20
40µs/div
0mV
0mV
VPOS
(AC-COUPLED)
100mV/div
VVCOM
(AC-COUPLED)
100mV/div
SUP SUPPLY CURRENT
vs. SUP SUPPLY VOLTAGEMAX17075 toc22
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)1681012
NO SWITCHING
HIGH-VOLTAGE SWITCH
CONTROL FUNCTION MAX17075 toc21
10µs/div
VGON
10V/div
VCTL
5V/div
Typical Operating Characteristics (continued)(TA = +25°C, unless otherwise noted.)
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
Pin Description
PINNAMEFUNCTIONPOS Operational Amplifier Noninverting Input NEG Operational Amplifier Inverting Input
3 OUT Operational Amplifier Output BGND Analog Ground for Operational Amplifier and Charge Pump. Connect to AGND underneath the IC.
5 SUP Operational Amplifier and Charge-Pump Supply Input. Connect this pin to the output of the boost
regulator (AVDD) and bypass to BGND with a minimum1µF capacitor. DRVP Positive Charge-Pump Driver Output DRVN Negative Charge-Pump Driver Output
8 CTL
High-Voltage Switch Control Input. When CTL is high, the switch between GON and SRC is on and the
switch between GON and DRN is off. When CTL is low, the switch between GON and DRN is on and the
switch between GON and SRC is off. CTL is inhibited by VCC UVLO and when DEL is less than 1.25V. RST Reset Output. RST is an open-drain output.
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 AGND to set the positive charge-pump
regulator output voltage. Place the resistive voltage-divider within 5mm of FBP.
11 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.
12 REF Reference Output. Connect a 0.22µF capacitor from REF to AGND. All power outputs are disabled until
REF exceeds its UVLO threshold.
13 VCC Supplies the Internal Reference and Other Internal Circuitry. Connect VCC to the input supply voltage
and bypass VCC to AGND with a minimum 1µF ceramic capacitor.
14 AGND Analog Ground for Step-Up Regulator and Linear Regulators. Connect to power ground (PGND)
underneath the IC.
15 RSTIN Reset Input. Connect to the center of a resistor-divider from VIN.
16 COMP Compensation Pin for Error Amplifier. Connect a series RC from COMP to AGND.
17 FB
Step-Up Regulator Feedback Input. Connect FB to the center of a resistive voltage-divider between the
step-up regulator output and AGND to set the regulator’s output voltage. Place the resistive voltage-
divider within 5mm of FB.
18, 19 PGND Power Ground
20 LX Step-Up Regulator Switching Node. Connect inductor and catch diode here and minimize trace area for
lowest EMI power ground.
21 DRN Switch Input. Drain of the internal high-voltage back-to-back p-channel FET connects to COM.
22 COM Internal High-Voltage MOSFET Switch Common Terminal
23 SRC Switch Input. Source of the internal high-voltage pFET. Bypass SRC to PGND with a minimum 0.1µF
capacitor close to the pin.
24 DEL High-Voltage Switch Delay Input. Connect a capacitor from DEL to AGND to set delay. EP Exposed Pad. Connect to AGND.
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op AmpMAX17075
AGND
VCC
BGND
DRVN
REF
FBN
POS
NEG
OUT
PGND
RSTIN
COMP
DRN
RST
COM
SRC
DRVP
FBP
SUPCTLDEL
C11
0.1µF
R14
1kΩ
R10
100kΩ
13.7kΩ
100kΩ
100kΩ
10Ω
R12
20kΩ
R15
464kΩ
R11
R13
10kΩ
187kΩ
20kΩ
C12
220pF
C10
1µF
0.22µF
1µF
C13
0.01µF
R16
20kΩ
VAVDD
TO VCOM
VIN
2.5V TO 5.5V
(4.5 TO 5.5V FOR FULL LOAD)
VAVDD
13V/500mA
VGON
30V/20mA
VGOFF
-7V/20mA
C15
0.1µF
C17
0.1µF
10µF
6.3V
10µF
6.3V
C14
1µF
1µF
C16
1µF
10µF
25V
10µF
25V
3.0µHD1
FROM SYSTEM
3.3V
VIN
VAVDD
VAVDD
VAVDD
FROM TCON
0.033µF
Figure 1. Typical Operating Circuit
Typical Operating CircuitThe typical operating circuit (Figure 1) of the
MAX17075 is a complete power-supply system for TFT
LCD panels in monitors and TVs. The circuit generates
a +13V source driver supply, a +30V positive gate-dri-
ver supply, and a -7V negative gate-driver supply from
a +2.5V to +5.5V input supply. Table 1 lists some
selected components, and Table 2 lists the contact
information for component suppliers.
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
Detailed DescriptionThe MAX17075 contains 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, digi-
tal soft-start, and timer-delayed fault protection. The
step-up regulator uses fixed-frequency current-mode
control architecture. The MAX17075 also includes one
high-performance operational amplifier designed to
drive the LCD backplane (VCOM). The amplifier fea-
tures high output current, fast slew rate (45V/µs), wide
bandwidth (20MHz), and rail-to-rail outputs. In addition,
the MAX17075 features a high-voltage switch-control
block, a 1.25V reference output, well-defined power-up
and power-down sequences, and thermal-overload
protection. Figure 2 shows the MAX17075 functional
block diagram.
MAX17075
POS
PGND
OUT
BGND
FBN
DRVN
COM
REF
VGON
VVCC
DRN
VCC
AGND
SRC
SUP
NEG
SWITCH
CONTROL
SEQUENCE
BOOST
CONTROLLER
NEGATIVE
CHARGE
PUMP
POSITIVE
CHARGE
PUMP
REF
OSCRSTIN
COMP
VVCC
VGOFF
DEL
DRVP
FBP
SUP
CTL
RST
FROM TCON
VAVDD
VVCC
VAVDD
POUT
VAVDD
Figure 2. Functional Diagram
