Rainbow-electronics MAX1747 Manual de usuario descargar pdf (Pagina 2)

MAX1747

Triple Charge-Pump TFT LCD

DC-DC Converter

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= V

SUPM

= +3.0V, V

SUPP

= V

SUPN

= +5V, TGND = PGND = GND, I

SHDN

= 22µA, C

OUT

= 2

4.7µF, C

REF

= 0.22µF, C

INTG

1500pF, V

OUT

= +5V, T

= 0°C to +85°C, unless otherwise noted. Typical values are at T

= +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.

IN, SUPM, OUT, TGND to GND................................-0.3V to +6V

SHDN........................................................................-0.3V to +1V

PGND to GND.....................................................................±0.3V

SUPM to IN .........................................................................±0.3V

CXN to PGND.........................................-0.3V to (V

SUPM

+ 0.3V)

CXP to PGND ............................(V

SUPM

- 0.3V) to (V

OUT

+ 0.3V)

DRVN to GND .........................................-0.3V to (V

SUPN

+ 0.3V)

DRVP to GND..........................................-0.3V to (V

SUPP

+ 0.3V)

RDY to GND ...........................................................-0.3V to +14V

SUPP, SUPN to GND..............................................-0.3V to +14V

INTG, REF, FB, FBN, FBP to GND...............-0.3V to (V

+ 0.3V)

Continuous Current into:

SUPM, CXN, CXP, OUT ..............................................±800mA

SUPP, SUPN, DRVN, DRVP........................................±200mA

SHDN...........................................................................+100µA

All Other Pins ....................................................................±10mA

Continuous Power Dissipation (T

= +70°C)

20-Pin TSSOP (derate 10.9mW/°C above +70°C) .......879mW

Operating Temperature Range............................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX U N IT S

Input Supply Range V

2.7 4.5 V

Input Undervoltage Threshold V

UVLO

falling, 40mV hysteresis (typ) 2.2 2.4 2.6 V

Input Quiescent Supply

Current

SUPM

= V

FBP

= 1.5V, V

FBN

= -0.2V, V

OUT

= 5V,

no load on DRVN and DRVP; CXN

and CXP open

0.9 1.0 mA

Output Quiescent Supply

Current

(

OUT

)

= V

FBP

= 1.5V, V

FBN

= -0.2V, V

OUT

= 5V,

no load on DRVN and DRVP; CXN and

CXP open

2.5 4.0 mA

Shutdown Supply Current V

SHDN

= 0, V

SUPM

= 5V 0.1 20 µA

Operating Frequency f

OSC

SHDN

= 22µA 0.65 1 1.2 MHz

MAIN CHARGE PUMP

Output Voltage Range V

OUT

4.5 5.5 V

Maximum Output Current I

OU T

(

M AX

)

= 0.47µF 200 mA

FB Regulation Voltage V

1.237 1.248 1.263 V

FB Input Bias Current I

= 1.25V -50 +50 nA

Integrator Transconductance 530 µS

FB Power-Ready Trip Level Rising edge 1.09 1.125 1.16 V

FB Fault Trip Level Falling edge 1.100 V

Main Soft-Start Period

4.096

/ F

OSC

NEGATIVE LOW-POWER CHARGE PUMP

SUPN Input Supply Range V

SUPN

2.7 13 V

SUPN Quiescent Current I

SUPN

FBN

= -0.2V, no load on DRVN 0.6 0.8 mA

SUPN Shutdown Current V

SHDN

= 0, V

SUPN

= 13V 0.1 10 µA

FBN Regulation Voltage V

FBN

-50 0 +50 mV

1 2 3 4 5 6 7 ... 12 13

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Rainbow-electronics MAX1747 Manual de usuario Pagina 2

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