MAX8761ETG+T ,Low-Cost, Linear-Regulator LCD Panel Power Suppliesfeatures♦ Latched Fault Protection with Timerhigh output current (150mA), fast slew rate (12V/µs), ..
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MAX8765AETI+T ,Low-Cost Multichemistry Battery ChargersELECTRICAL CHARACTERISTICS(V = V = V = 18V, V = V = V = 12V, V = 3V, V = V = 0.75 x V , CELLS = ope ..
MAX8765ETI , Low-Cost Multichemistry Battery Chargers
MAX8765ETI+ ,Low-Cost Multichemistry Battery ChargersELECTRICAL CHARACTERISTICS(V = V = V = 18V, V = V = V = 12V, V = 3V, V = V = 0.75 x V , CELLS = ope ..
MAX8765ETI+T ,Low-Cost Multichemistry Battery ChargersEVALUATION KIT AVAILABLEMAX1908/MAX8724/ MAX8765/MAX8765ALow-Cost Multichemistry Battery Chargers
MB85R1002 ,Memory FRAMFEATURES• Bit configuration : 65,536 words x 16 bits10 Read/write endurance : 10 times Operating ..
MB85R256G , 256K-bits FRAM LSI using the ferroelectric process and CMOS process technologies
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MB85RC16PNF-G-JNERE1 , Memory FRAM 16 K (2 K x 8) Bit I2C
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MB86029 ,TV/VCR D/A Converter (3 ch, 8 bit)features on-chip voltage reference, pedestal insertion, and power-down circuits, and a maximum conv ..
MAX8710ETG+-MAX8761ETG+-MAX8761ETG+T
Low-Cost, Linear-Regulator LCD Panel Power Supplies
General DescriptionThe MAX8710/MAX8711/MAX8712/MAX8761 offer com-
plete linear-regulator power-supply solutions for thin-film
transistor (TFT) liquid-crystal-display (LCD) panels used
in LCD monitors and LCD TVs. All four devices include a
high-performance AVDDlinear regulator, a positive
charge-pump regulator, a negative charge-pump regula-
tor, and built-in power-up sequence control. The
MAX8710/MAX8711/MAX8761 also include a high-cur-
rent operational amplifier. Additionally, the MAX8710/
MAX8761 provide logic-controlled high-voltage switches
to control the positive charge-pump output.
The linear regulator directly steps down the input voltage
to generate the supply voltage for the source-driver ICs
(AVDD). The two built-in charge-pump regulators
are used to generate the TFT gate-on and gate-off sup-
plies. The high-current operational amplifier is typically
used to drive the LCD backplane (VCOM) and features
high output current (150mA), fast slew rate (12V/µs), and
wide bandwidth (12MHz). Its rail-to-rail inputs and output
maximize flexibility.
The MAX8710/MAX8761 are available in a 24-pin thinQFN package, the MAX8711 is available in a 16-pin thin
QFN package, and the MAX8712 is available in a 12-pin
thin QFN package. All three packages are 4mm x 4mmwith a maximum thickness of 0.8mm for ultra-thin LCD
panel design. The MAX8710/MAX8711/MAX8712 oper-ate over the -40°C to +100°C temperature range and the
MAX8761 operates over the -40°C to +85°C range.
ApplicationsLCD Monitor Panel Modules
LCD TV Panel Modules
FeaturesHigh-Performance Linear Regulator1.6% Output Accuracy
Works with Small Ceramic Output Capacitors
Fast Transient Response
Foldback Current Limit50mA Negative Regulated Charge Pump20mA Positive Regulated Charge Pump with
Adjustable DelayBuilt-In Power-Up SequenceHigh-Current Operational Amplifier
(MAX8710/MAX8711/MAX8761)±150mA Output Short-Circuit Current
12V/µs Slew Rate
12MHz, -3dB Bandwidth
Rail-to-Rail Inputs/OutputDual-Mode™High-Voltage Switches
(MAX8710/MAX8761)Thermal ProtectionLatched Fault Protection with Timer
MAX8710/MAX8711/MAX8712/MAX8761
Low-Cost, Linear-Regulator
LCD Panel Power SuppliesFBN
SUPCP
DRVN
DLP
POSB
SUPB
OUTB
NEGB
MODE
CTL
GNDINL
OUTL
FBL
SHDN
DRVP
FBP
SRC
VGON
AVDD
GON
DRN
THR
REF
VGOFF
CTL
AVDD
VCOM
REFREF
AVDD
VIN
MAX8710
MAX8761
Minimum Operating CircuitSRC
FBN
DLP
MODE
FBL
CTL
OUTL
SUPCP
DRVN
DRVP
N.C.1415161718
GNDOUTBSUPBTHRFBPSHDN54321
NEGB
INL
POSB
REF
DRNGON
MAX8710
MAX8761
THIN QFN 4mm x 4mmTOP VIEW
Pin Configurations
Ordering Information
PARTTEMP RANGEPIN-PACKAGEPKG
CODEA X8 7 1 0E TG+ -40°C to +100°C24 Thin QFN
4mm x 4mmT2444-4
A X8 7 1 1E TE+ -40°C to +100°C16 Thin QFN
4mm x 4mmT2444-4
A X8 7 1 2E TC+ -40°C to +100°C12 Thin QFN
4mm x 4mmT2444-4
A X8 7 6 1E TG+ -40°C to +85°C24 Thin QFN
4mm x 4mmT2444-4
19-3174; Rev 1; 10/05
Pin Configurations continued at end of data sheet.
EVALUATION KIT
AVAILABLE+Denotes lead-free package.
MAX8710/MAX8711/MAX8712/MAX8761
Low-Cost, Linear-Regulator
LCD Panel Power Supplies
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(Circuit of Figure1. VIN= VINL= VSUPCP= 12V, VOUTL= VSUPB= 10V, VSRC= 27V, 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.
CTL, FBL, FBP, FBN, SHDN, REF, THR to GND........-0.3V to +6V
MODE, DLP to GND......................................-0.3V to VREF + 0.3V
IN, INL to GND.........................................................-0.3V to +28V
SUPCP, SUPB to GND.............................................-0.3V to +14V
OUTL (MAX8710/MAX8761) ………………………-0.3V to +28V
OUTL (MAX8711/MAX8712) ………………………-0.3V to +14V
POSB, OUTB, NEGB to GND.....................-0.3V to VSUPB + 0.3V
DRVN, DRVP (MAX8710/MAX8761).......-0.3V to (VSUPCP- 0.3V)
DRVN, DRVP (MAX8711/MAX8712)...............-0.3V to (VIN- 0.3V)
SRC to GND.............................................................-0.3V to +30V
GON, DRN to GND.......................................-0.3V to VSRC + 0.3V
DRN to GON.............................................................-30V to +30V
OUTB Maximum Continuous Output Current.....................±75mA
DRVP RMS Output Current...................................................90mA
DRVN RMS Output Current...............................................-150mA
Continuous Power Dissipation (TA= +70°C)
24-, 16-, and 12-Pin Thin QFN 4mm x 4mm
(derate 16.9mW/°C above +70°C)..............................1349mW
Operating Temperature Range
MAX8710/MAX8711/MAX8712.......................-40°C to +100°C
MAX8761...........................................................-40°C to +85°C
Junction Temperature........................................................+150°C
Storage Temperature Range..............................-65°C to +160°C
Lead Temperature (soldering, 10s)...................................+300°C
PARAMETERCONDITIONSMINTYPMAXUNITSIN Operating Supply Range828V
SHDN = GND0.20.4IN Quiescent CurrentSHDN = 3.3V2.5mADuration to Trigger Fault Condition 216 oscillator clock cycles 44 ms
REF Output Voltage-10µA < IREF < 1mA (excluding internal load)4.95.05.1V
SUPCP Input Supply Range2.713.2V
Charge-Pump Regulators Operating
Frequency127515001725kHz
Thermal ShutdownRising temperature, 15°C hysteresis+160°C
LINEAR REGULATORINL Operation Supply RangeVOUTL < VINL728V
IOUTL = 50mA (MAX8710/MAX8711/MAX8712)150300Dropout VoltageIOUTL = 200mA (MAX8761)200400mV
FBL Regulation VoltageIOUTL = 50mA2.462.502.54V
FBL Input Bias CurrentVFBL = 2.5V50nA
FBL Fault Trip LevelFalling edge1.922.002.08V
VINL = VIN = 10.8V~13.2V, VOUTL = 10V,
IOUTL = 50mA15FBL Line-Regulation Error
VINL = VIN = 10V~28V, VOUTL = 9V, IOUTL = 50mA10BandwidthGuaranteed by design1000kHz
VFBL = 2.4V (MAX8710/MAX8711/MAX8712)300Maximum OUTL CurrentVFBL = 2.4V (MAX8761)500mA
OUTL Soft-Start Period 212 oscillator clock cycles in a 7-bit DAC2.73ms
VIN = 12V, 5mA < IOUT < 300mA
(MAX8710/MAX8711/MAX8712)2OUTL Load Regulation
VIN = 12V, 5mA < IOUT < 500mA (MAX8761)2
MAX8710/MAX8711/MAX8712/MAX8761
Low-Cost, Linear-Regulator
LCD Panel Power Supplies
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure1. VIN= VINL= VSUPCP= 12V, VOUTL= VSUPB= 10V, VSRC= 27V, TA
= 0°C to +85°C. Typical values are at TA=
+25°C, unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS
OPERATIONAL AMPLIFIER (MAX8710/MAX8711/MAX8761)SUPB Supply Operating Range4.513.2V
SUPB Supply CurrentBuffer configuration, VPOSB = 4V, no load0.71.0mA
Input Offset Voltage(VNEGB, VPOSB) = VSUPB / 2, TA = +25°C012mV
Input Bias Current(VNEGB, VPOSB) = VSUPB / 2-50+1+50nA
Common-Mode Input RangeVNEGB, VPOSB0VSUPBV
Common-Mode Rejection Ratio0 ≤ (VNEGB, VPOSB) < VSUPB5090dB
Open-Loop Gain125dB
IOUTB = 100µAVSUPB -
VSUPB -
Output Voltage Swing High
IOUTB = 5mAVSUPB -
VSUPB -
IOUTB = -100µA215 Output Voltage Swing LowIOUTB = -5mA80150mV
Short to VSUPB / 2, sourcing50150Short-Circuit CurrentShort to VSUPB / 2, sinking50140mA
Output CurrentBuffer configuration, VPOSB = 4V,
VOUTB error < ±10mV±40mA
Power-Supply Rejection Ratio6V ≤ VSUPB ≤ 13.2V, DC (VNEGB, VPOSB) = VSUPB / 260100dB
Slew Rate12V/µs
-3dB BandwidthBuffer configuration, RL = 10kΩ, CL = 10pF12MHz
Gain-Bandwidth ProductBuffer configuration, RL = 10kΩ, CL = 10pF8MHz
POSITIVE CHARGE-PUMP REGULATORFBP Regulation VoltageIGON = 10mA2.4252.5002.575V
FBP Line-Regulation ErrorVOUTL (VSUPCP, MAX8710/MAX8761)
= 10.8V~13.2V, VGON = 27V, IGON = 20mA25mV
FBP Input Bias CurrentVFBP = 2.5V-50+50nA
DRVP p-Channel On-Resistance1530Ω
VFBP = 2.4V612Ω DRVP n-Channel On-ResistanceVFBP = 2.6V20kΩ
FBP Fault Trip Level Falling edge1.922.002.08VPositive Charge-Pump Soft-Start
Period 212 oscillator clock cycles in a 7-bit DAC2.73ms
NEGATIVE CHARGE-PUMP REGULATORFBN Regulation VoltageIGOFF = 10mA200250300mV
FBN Input Bias CurrentVFBN = 250mV-50+50nA
FBN Line RegulationVOUTL (VSUPCP, MAX8710/MAX8761)
= 10.8V~13.2V, VVGOFF = -6V, IGOFF = -50mA25mV
DRVN p-Channel On-Resistance7.515Ω
MAX8710/MAX8711/MAX8712/MAX8761
Low-Cost, Linear-Regulator
LCD Panel Power Supplies
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1. VIN= VINL= VSUPCP= 12V, VOUTL= VSUPB= 10V, VSRC= 27V, TA
= 0°C to +85°C. Typical values are at TA=
+25°C, unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITSVFBN = 350mV36Ω DRVN n-Channel On-ResistanceVFBN = 150mV20kΩ
FBN Fault Trip Level Rising edge700mVNegative Charge-Pump Soft-Start
Period 212 oscillator clock cycles in a 7-bit DAC2.73ms
SEQUENCE CONTROLSHDN Input Low Voltage0.6V
SHDN Input High Voltage2.0V
SHDN Input Current1µA
DLP Capacitor Charge CurrentDuring startup, VDLP = 1.0V456µADLP Turn-On Threshold2.3752.52.625V
SHDN = low or fault tripped; DLP, FBP, FBN to GND10Ω
Pin Discharge Switch On-ResistanceSHDN = low or fault tripped;
MODE, OUTL, OUTB to GND
MAX8710, SHDN = low or fault trip; GON to GND
1kΩ
POSITIVE GATE-DRIVER TIMING AND CONTROL SWITCHES (MAX8710/MAX8761)CTL Input Low Voltage0.6V
CTL Input High Voltage2.0V
CTL Input Leakage Current-1+1µA
CTL to GON Rising Propagation
Delay
VMODE = VREF, 1.5nF from GON to GND, VCTL = 0 to
3V step, no load on GON, measured from VCTL = 1.5V
to GON = 20%
100ns
CTL to GON Falling Propagation
Delay
VMODE = VREF, 1.5nF from GON to GND, VCTL = 3V to
0 step, DRN falling, no load on DRN and GON,
measured from VCTL = 1.5V to GON = 80%
100ns
SRC Input Voltage Range28V
SRC Input CurrentVMODE = VREF, VDLP = 3V, CTL = high150250µA
DRN Input CurrentVMODE = VREF, VDRN = 8V, VDLP = 3V, VCTL = 0V2640µA
SRC Switch On-ResistanceVMODE = VREF, VDLP = 3V, CTL = high2040Ω
DRN Switch On-ResistanceVMODE = VREF, VDLP = 3V, VCTL = 0V60Ω
MODE Switch On-Resistance1kΩ
Mode 2 MODE Capacitor Charge
CurrentVMODE < MODE current-source stop voltage threshold425064µA
MODE Voltage Threshold for
Enabling DRN Switch Control in
Mode 2
2.32.52.7V
MODE Current-Source Stop Voltage
ThresholdVMODE rising, CMODE = 150pF3.33.53.7V
THR to GON Voltage Gain9.41010.6V/V
GON Falling Slew Rate13.5V/µs
MAX8710/MAX8711/MAX8712/MAX8761
Low-Cost, Linear-Regulator
LCD Panel Power Supplies
ELECTRICAL CHARACTERISTICS(Circuit of Figure1. VIN= VINL= VSUPCP= 12V, VOUTL= VSUPB= 10V, VSRC= 27V, TA
= -40°C to +100°C(-40°C to 85°C for
MAX8761), unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITSREF Output Voltage-10µA < IREF < 1mA (excluding internal load)4.95.1V
SUPCP Input Supply Range2.713.2V
Charge-Pump Regulators Operating
Frequency12001850kHz
LINEAR REGULATORIOUTL = 50mA (MAX8710/MAX8711/MAX8712)300Dropout VoltageIOUTL = 200mA (MAX8761)400mV
FBL Regulation VoltageIOUTL = 50mA2.4552.545V
FBL Fault Trip LevelFalling edge1.962.04V
FBL Line-Regulation ErrorVINL = VIN = 10.8V~13.2V, VOUTL = 10V,
IOUTL = 50mA15mV
VFBL = 2.4V (MAX8710/MAX8711/MAX8712)300Maximum OUTL CurrentVFBL = 2.4V (MAX8761)500mA
VIN = 12V, 5mA < IOUT < 300mA
(MAX8710/MAX8711/MAX8712)2OUTL Load Regulation
VIN = 12V, 5mA < IOUT < 500mA (MAX8761)2
OPERATIONAL AMPLIFIER (MAX8710/MAX8711/MAX8761)SUPB Supply CurrentBuffer configuration, VPOSB = 4V, no load1.0mA
Input Offset Voltage(VNEGB, VPOSB) = VSUPB / 214mV
IOUTB = 100µAVSUPB -Output-Voltage-Swing High
IOUTB = 5mAVSUPB -
IOUTB = -100µA15 Output-Voltage-Swing LowIOUTB = -5mA150mV
Short to VSUPB / 2, sourcing50Short-Circuit CurrentShort to VSUPB / 2, sinking50mA
POSITIVE CHARGE-PUMP REGULATORMAX8710/MAX8711/MAX87122.4252.575FBP Regulation VoltageIGON = 10mAMAX87612.402.65V
VOUTL (VSUPCP, MAX8710)
= 10.8V~13.2V, VGON = 27V, IGON = 20mA25
FBP Line-Regulation Error
VOUTL (VSUPCP, MAX8761)
= 10.8V ~ 13.2V, VGON = 27V, IGON = 20mA50
DRVP p-Channel On-Resistance30Ω
VFBP = 2.4V12Ω DRVP n-Channel On-ResistanceVFBP = 2.6V20kΩ
NEGATIVE CHARGE-PUMP REGULATORFBN Regulation VoltageIGOFF = 10mA200300mV
FBN Line RegulationVOUTL (VSUPCP, MAX8710/MAX8761)
= 10.8V~13.2V, VGOFF = -6V, IGOFF = -50mA25mV
DRVN p-Channel On-Resistance15Ω
MAX8710/MAX8711/MAX8712/MAX8761
Low-Cost, Linear-Regulator
LCD Panel Power Supplies
Note 1:Specifications to -40°C and +85°C are guaranteed by design, not production tested.
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure1. VIN= VINL= VSUPCP= 12V, VOUTL= VSUPB= 10V, VSRC= 27V, TA
= -40°C to +100°C, (-40°C to +85°C forMAX8761), unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITSVFBN = 350mV6Ω DRVN n-Channel On-ResistanceVFBN = 150mV20kΩ
SEQUENCE CONTROLSHDN Input Low Voltage0.6V
MAX8710/MAX8711/MAX87122.0SHDN Input High VoltageMAX87612.05V
DLP Capacitor Charge CurrentDuring startup, VDLP = 1.0V46µADLP Turn-On Threshold2.3752.625V
POSITIVE GATE-DRIVER TIMING AND CONTROL SWITCHES (MAX8710/MAX8761)SRC Input CurrentVMODE = VREF, VDLP = 3V, CTL = high250µA
DRN Input CurrentVMODE = VREF, VDRN = 8V, VDLP = 3V, VCTL = 0V40µA
SRC Switch On-ResistanceVMODE=VREF, VDLP = 3V, CTL = high40Ω
Mode 2 MODE Capacitor Charge
CurrentVMODE < MODE current-source stop voltage threshold4264µA
MODE Voltage Threshold for
Enabling DRN Switch Control in
Mode 2
2.32.7V
Typical Operating Characteristics(Circuit of Figure1. VIN= VINL= VSUPCP= 12V, VOUTL= VSUPB= 10V, VSRC= 27V, TA= 0°C to +85°C. Typical values are at TA=
+25°C, unless otherwise noted.)
MAX8710/MAX8711/MAX8712
LINEAR-REGULATOR LINE REGULATION MAX8710/11/12/61 toc01
INPUT VOLTAGE (V)
OUTPUT-VOLTAGE ERROR (%)2422201816141228
VOUTL = 10V
IOUTL = 50mA
IOUTL = 300mA
MAX8761 LINEAR REGULATOR
LINE REGULATIONOUTPUT-VOLTAGE ERROR (%)
MAX8710/11/12/61 toc021214161820222426
INPUT VOLTAGE (V)
VOUTL = 10V
IOUTL = 50mA
IOUTL = 500mA
MAX8710/MAX8711/MAX8712
LINEAR-REGULATOR LOAD REGULATIONMAX8710/11/12/61 toc03
LOAD CURRENT (mA)
OUTPUT-VOLTAGE ERROR (%)
VOUTL = 10V
VINL = 12V
MAX8710/MAX8711/MAX8712/MAX8761
Low-Cost, Linear-Regulator
LCD Panel Power Supplies
MAX8761
LINEAR-REGULATOR LOAD REGULATIONOUTPUT-VOLTAGE ERROR (%)
MAX8710/11/12/61 toc04100200300400500
LOAD CURRENT (mA)
VOUTL = 10V
VINL = 12V
MAX8710/MAX8711/MAX8712 LINEAR-
REGULATOR LOAD TRANSIENT RESPONSEMAX8710/11/12/61 toc05
20μs/div
10V
0mA
A: VOUTL, 50mV/div, AC-COUPLED
B: IOUTL, 200mA/div
MAX8761 LINEAR-REGULATOR LOAD
TRANSIENT RESPONSE MAX8710/11/12/61 toc06
40μs
A: IOUTL, 200mA/div
B: VOUTL, AC-COUPLED, 20mV/div
MAX8710/MAX8711/MAX8712 LINEAR-
REGULATOR PULSED LOAD-TRANSIENT
RESPONSEMAX8710/11/12/61 toc07
4μs/div
10V
0mA
A: VOUTL, 100mV/div, AC-COUPLED
B: IOUTL, 500mA/div
MAX8761 LINEAR-REGULATOR
PULSED LOAD TRANSIENT RESPONSE MAX8710/11/12/61 toc08
10μs
A: IOUTL, 500mA/div
B: VOUTL, AC-COUPLED, 100mV/div
MAX8710/MAX8711/MAX8712 LINEAR-
REGULATOR OVERCURRENT PROTECTIONMAX8710/11/12/61 toc09
10ms/div
0mA
A: VOUTL, 5V/div
B: IOUTL, 500mA/div
MAX8710/11/12/61 toc10
10μs
A: VOUTL, 5V/div
MAX8761 LINEAR REGULATOR
OVERCURRENT PROTECTION
CHARGE-PUMP NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGEMAX8710/11/12/61 toc11
SUPPLY CURRENT (mA)1211109
POSITIVE CHARGE-PUMP LOAD
REGULATION
MAX8710/11/12/61 toc07
OUTPUT-VOLTAGE ERROR (%)203010
INPUT = 12V
ypical Operating Characteristics (continued)(Circuit of Figure1. VIN= VINL= VSUPCP= 12V, VOUTL= VSUPB= 10V, VSRC= 27V, TA= 0°C to +85°C. Typical values are at TA=
+25°C, unless otherwise noted.)
MAX8710/MAX8711/MAX8712/MAX8761
Low-Cost, Linear-Regulator
LCD Panel Power Suppliesypical Operating Characteristics (continued)(Circuit of Figure1. VIN= VINL= VSUPCP= 12V, VOUTL= VSUPB= 10V, VSRC= 27V, TA= 0°C to +85°C. Typical values are at TA=
+25°C, unless otherwise noted.)
POSITIVE CHARGE-PUMP
LINE REGULATIONMAX8710/11/12/61 toc13
INPUT VOLTAGE (V)
OUTPUT-VOLTAGE ERROR (%)1211
20mA LOAD CURRENT
NEGATIVE CHARGE-PUMP LOAD
REGULATIONMAX8710/11/12 toc14
LOAD CURRENT (mA)
OUTPUT-VOLTAGE ERROR (%)802040
VGOFF = -5V
INPUT = 12V
NEGATIVE CHARGE-PUMP LINE
REGULATIONMAX8710/11/12/61 toc15
INPUT VOLTAGE (V)
OUTPUT-VOLTAGE ERROR (%)12111098
VGOFF = -5V
IGOFF = 50mA
POWER-UP SEQUENCEMAX8710/11/12/61 toc16
10ms/div
A: VOUTL, 10V/div
B: VGOFF, 5V/div
C: VGON, 10V/div
MAX8710/MAX8761 SWITCH CONTROL
FUNCTION (MODE 1)MAX8710/11/12/61 toc17
20μs/div
A: VGON, 10V/div
B: VMODE, 5V/div
C: VCTL, 5V/div
CGON = 1.5nF
MAX8710/MAX8761
SWITCH CONTROL FUNCTION (MODE 2)MAX8710/11/12/61 toc18
20μs/div
A: VGON, 10V/div
CGON = 1.5nF
REFERENCE LOAD REGULATIONMAX8710/11/12/61 toc19
REF LOAD CURRENT (mA)
REF VOLTAGE ERROR (%)
01.0
MAX8710/MAX8711/MAX8712/MAX8761
Low-Cost, Linear-Regulator
LCD Panel Power Supplies
MAX8710/MAX8711/MAX8761 SUPB SUPPLY
CURRENT vs. SUPB VOLTAGEMAX8710/11/12/61 toc21
SUPB VOLTAGE (V)
SUPB SUPPLY CURRENT (mA)1086
BUFFER CONFIGURATION
VOUTB = 0.5 x VPOSB
MAX8710/MAX8711/MAX8761 OPERATIONAL-
AMPLIFIER SMALL-SIGNAL STEP RESPONSE
(BUFFER CONFIGURATION)MAX8710/11/12/61 toc22
400ns/div
A: VPOSB, 50mV/div, AC-COUPLED
B: VOUTB, 50mV/div, AC-COUPLED
MAX8710/MAX8711/MAX8761 OPERATIONAL-
AMPLIFIER LARGE-SIGNAL STEP
RESPONSE (BUFFER CONFIGURATION)MAX8710/11/12/61 toc23
400ns/div
A: VPOSB, 5V/div
B: VOUTB, 5V/div
MAX8710/MAX8711/MAX8761 OPERATIONAL-
AMPLIFIER LOAD TRANSIENT
RESPONSE (BUFFER CONFIGURATION)MAX8710/11/12/61 toc24
1μs/div
0mA
A: VOUTB, 2V/div
B: IOUTB, 50mA/div
MAX8710/MAX8711/MAX8761 OPERATIONAL-
AMPLIFIER RAIL-TO-RAIL I/OMAX8710/11/12/61 toc25
40μs/div
A: VPOSB, 5V/div
B: VOUTB, 5V/div
ypical Operating Characteristics (continued)(Circuit of Figure 1. VIN= VINL= VSUPCP= 12V, VOUTL= VSUPB= 10V, VSRC= 27V, TA= 0°C to +85°C. Typical values are at TA=
+25°C, unless otherwise noted.)
REFERENCE vs. TEMPERATUREMAX8710/11/12/91 toc20
TEMPERATURE (°C)
REF VOLTAGE ERROR (%)6040200-20
-40100
MAX8710/MAX8711/MAX8712/MAX8761
Low-Cost, Linear-Regulator
LCD Panel Power Supplies
PIN
MAX8710/
MAX8761MAX8711MAX8712NAMEFUNCTION——GON
Inter nal H i g h- V ol tag e M OS FE T S w i tch C om m on Ter m i nal . GON i s the outp ut of the
hi g h- vol tag e sw i tch- contr ol b l ock. GON i s i nter nal l y p ul l ed to GN D b y a 1kΩ r esi stor i n
shutd ow n for the M AX 8710. G ON i s not p ul l ed to GN D for the M AX 8761.——DRNSwitch Input. Drain of the internal high-voltage back-to-back p-channel
MOSFETs connected to GON.11REFReference Output. Connect a 0.22µF capacitor from REF to GND. REF remains
on in shutdown.2—POSBOperational-Amplifier Noninverting Input32INLLinear-Regulator Supply Input4—NEGBOperational-Amplifier Inverting Input53INIC Supply Input. Bypass IN to GND with a 0.1µF capacitor.64OUTL
Linear-Regulator Output. OUTL is internally pulled to GND by a 1kΩ resistor in
shutdown. For the MAX8711/MAX8712, OUTL is also the supply input for the
charge-pump regulators.——SUPCPSupply Input for the Charge-Pump Regulators. Connect a 0.1µF capacitor from
SUPCP to GND.75DRVN
Negative Charge-Pump Driver Output. Output high level is VSUPCP, and output
low level is GND. DRVN is internally pulled high to SUPCP when the negative
charge pump is disabled.86DRVPPositive Charge-Pump Driver Output. Output high level is VSUPCP, and output
low level is GND. DRVP is internally pulled low in shutdown.——N.C.No Connection. Not internally connected.97GNDGround10—OUTBOperational-Amplifier Output. OUTB is internally pulled to GND by a 1kΩ resistor
in shutdown.11—SUPBO p er ati onal - Am p l i fi er S up p l y Inp ut. Byp ass S U P B to GN D w i th a 0.1µF cap aci tor .——THR
GON Low-Level Regulation Set-Point Input. Connect THR to the center of a
resistive voltage-divider between REF and GND to set the VGON regulation level.
The actual level is 10 × VTHR. See the Switch Control (MAX8710/MAX8761)
section for details.128FBP
Positive Charge-Pump Feedback Input. Connect FBP to the center of a resistive
voltage-divider between the positive charge-pump regulator output and GND to
set the regulator output voltage. Place the divider within 5mm of FBP. FBP is
internally pulled to GND by a 10Ω resistor in shutdown.
Pin Description
MAX8710/MAX8711/MAX8712/MAX8761
Low-Cost, Linear-Regulator
LCD Panel Power Supplies
PIN
MAX8710/
MAX8761MAX8711MAX8712
NAMEFUNCTION139SHDN
Active-Low Shutdown Control Input. Pull SHDN low to turn off all sections of the
device except REF. Pull SHDN high to enable the device. Cycle SHDN to reset
the device after a fault.——CTLHigh-Voltage Switch-Control Block Timing Control Input. See the Switch Control
(MAX8710/MAX8761) section for details.1410FBL
Linear-Regulator Feedback Input. Connect FBL to the center of a resistive
voltage-divider between the linear-regulator output and GND to set the linear-
regulator output voltage. Place the divider within 5mm of FBL.——MODE
High-Voltage Switch-Control Block-Mode Selection Input and Timing-Adjustment
Input. See the Switch Control (MAX8710/MAX8761) section for details. MODE is
high impedance when it is connected to REF. MODE is internally pulled to GND
by a 1kΩ resistor during REF UVLO, when VDLP < 2.5V, or in shutdown.1511DLP
Positive Charge-Pump Startup Delay and High-Voltage Switch Delay Input.
Connect a capacitor from DLP to GND to set the delay time. A 5µA current
source charges CDLP. DLP is internally pulled to GND by a 10Ω resistor in
shutdown.1612FBN
Negative Charge-Pump Feedback Input. Connect FBN to the center of a
resistive voltage-divider between the negative output and REF to set the output
voltage. Place the divider within 5mm of FBN. FBN is internally pulled to GND
through a 10Ω resistor in shutdown.——SRCSwitch Input. Source of the internal high-voltage p-channel MOSFET connected
to GON.
Pin Description (continued)
Typical Operating CircuitFigures 1, 2, and 3 are the Typical Operating Circuitsof
the MAX8710/MAX8761, MAX8711, and MAX8712 for
generating power rails in TFT LCD panels. The input
voltage range is from 10.8V to 13.2V. The AVDDoutput
is 10V at 300mA, the VGONoutput is 27V at 20mA, and
the VGOFFoutput is -5V at 50mA.
Detailed DescriptionThe MAX8710/MAX8711/MAX8712/MAX8761 include a
high-performance linear regulator, a positive charge-
pump regulator, a negative charge-pump regulator, and
built-in power-up sequence control. The MAX8710/
MAX8711/MAX8761 also include a high-current opera-
tional amplifier. Additionally, the MAX8710/MAX8761 pro-
vide logic-controlled high-voltage switches to control the
positive charge-pump output. The linear regulator directly
steps down the input voltage to generate the source-dri-
ver ICs’ supply voltage. The two built-in charge-pump
regulators are used to generate the TFT gate-on and
gate-off supplies. The high-current operational amplifier is
typically used to drive the LCD backplane (VCOM) and
features high output current (150mA), fast slew rate
(12V/µs), and wide bandwidth (12MHz). Its rail-to-rail
inputs and output maximize flexibility.
Linear RegulatorThe MAX8710/MAX8711/MAX8712/MAX8761 contain a
linear regulator including a PMOS pass transistor. The
MAX8710/MAX8711/MAX8712 can supply an output cur-
rent of at least 300mA and the MAX8761 can supply at
least 500mA. Connect an external resistive voltage-
divider between the regulator output and GND with the
midpoint connected to FBL to adjust the linear-regulator
output. An error amplifier compares the FBL voltage with
the 2.5V internal reference voltage and amplifies the dif-
ference. If the feedback voltage is higher than the
MAX8710/MAX8711/MAX8712/MAX8761
Low-Cost, Linear-Regulator
LCD Panel Power SuppliesPOSB
AVDD
OUTB
120kΩ
MMBD4148SE
(FAIRCHILD)
MMBD4148SE
(FAIRCHILD)
MMBD4148SE
(FAIRCHILD)0.22μF
0.47μF51.1kΩ
20kΩ
1μF
110kΩ
100kΩ
100kΩ
OUTB
DRVN
FBN
NEGB
OUTL
AVDD
10V
300mA/500mA
(MAX8710/MAX8761)
27V/20mA
GND
GNDIN
10.8V TO 13.2V
0.1μF10μF
4.7μF/10μF
(MAX8710/MAX8761)
0.1μF
0.1μF
1μF
0.1μF100kΩ
0.1μF
325kΩ
0.1μF
20kΩGON
CTL
0.1μF
0.1μF
47pF/22pF
(MAX8710/MAX8761)
33.2kΩ
33.2kΩ
100kΩ
GOFF
-5V/50mA
REF
5V/1mA
SHDN
SUPB
MAX8710
MAX8761
N.C.INL
REF
THR
MODE
SHDNDLPCTL
DRN
GON
SRC
FBP
DRVP
SUPCP
FBL
Figure1. MAX8710/MAX8761 Typical Operating Circuit
MAX8710/MAX8711/MAX8712/MAX8761
Low-Cost, Linear-Regulator
LCD Panel Power SuppliesPOSB
AVDD
OUTB
120kΩ
MMBD4148SE
(FAIRCHILD)
MMBD4148
2x MMBD4148SE
(FAIRCHILD)
0.22μF
0.47μF
1μF
110kΩ
100kΩ
100kΩ
OUTB
DRVN
FBN
NEGB
OUTL
AVDD
10V/300mA
GON
27V/20mA
GND
GNDIN
10.8V TO 13.2V
0.1μF10μF
4.7μF
0.1μF
1μF
0.1μF
325kΩ
0.1μF
0.1μF
47pF
33.2kΩ
33.2kΩ
100kΩ
GOFF
-5V/50mA
REF
5V/1mA
SHDN
SUPB
MAX8711
INL
REF
SHDN
DLP
FBP
DRVP
FBL
1μF
0.1μF
Figure2. MAX8711 Typical Operating Circuit
