Step-Up Regulator, Internal Charge Pumps, Switch

Control, and Operational Amplifier for TFT LCDs

2

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

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.

POS1, NEG1, POS2, NEG2, POS3, OUT1, OUT2,

PGND, BGND to AGND.........................................-0.3V to +0.3V

LX, RSET to PGND .................................................-0.3V to +22V

SUP to AGND .........................................................-0.3V to +22V

C1P to AGND .........................................................-0.3V to +30V

POUT to C2P, C1P to C2P......................................-0.3V to +22V

C2P, POUT to AGND..............................................-0.3V to +40V

GON, DRN to AGND ..............................................-0.3V to +40V

DRN to GON............................................................-30V to +30V

REF Short Circuit to AGND.........................................Continuous

RMS DRVN Current...........................................................400mA

LX, PGND RMS Current Rating.............................................2.4A

40-Pin TQFN (derate 35.7mW/°C above +70°C) .......2857mW

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

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

Storage Temperature Range .............................-65°C to +160°C

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

Soldering Temperature (reflow) .......................................+260°C

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

4.0

5.5

V

2.4

2.6

2.8

V

1.0

46

SHDN = GND

0.05

mA

SHDN Input Low Voltage

0.8

V

SHDN Input High Voltage

1.8

V

SHDN Input Current

-1

+1

µA

REFERENCE

REF Output Voltage

No external load

1.238

1.250

1.262

V

REF Load Regulation

10

mV

REF Sink Current

In regulation

10

µA

REF Undervoltage Lockout Threshold

Rising edge, typical hysteresis = 200mV

1.0

1.15

V

OSCILLATOR AND TIMING

Frequency

1000

1200

1400

kHz

Oscillator Maximum Duty Cycle

87

90

93

%

Duration to Trigger Fault Condition

47

55

65

ms

ADEL, GDEL Capacitor Charge Current

4

5

6

µA

ADEL, GDEL Turn-On Threshold

1.25

1.32

V

STEP-UP REGULATOR

1.235

1.246

1.256

FB Regulation Voltage

1.238

1.246

1.256

V

FB Fault-Trip Level

Falling edge

0.96

1.00

1.04

V

FB Load Regulation

-1

%

FB Line Regulation

0.25

%/V

FB Input Bias Current

100

200

nA