Triple-Output TFT LCD Power Supply

with Fault Protection

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5

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

LOGIC SIGNAL (FREQ)

Input Low Voltage

V

Input High Voltage

V

Input Current

1µA

OVERCURRENT COMPARATOR

Input Offset Voltage

-5

+5

mV

Input Bias Current

-50

+50

nA

OCN, OCP Input

Common-Mode Range

1.5

0.8 x

V

FAULT TIMER AND GATE DRIVER

GATE Output Sink Current

6

18

µA

GATE Output

Pulldown Resistance

200

Ω

GATE Output Pullup Resistance

200

Ω

Note 1: Quiescent current does not include switching losses.

Note 2: FB regulation voltage is tested with no slope compensation ramp. Slope compensation needs to be included when selecting

resisitors for setting the output voltage (see Main Step-Up Regulator and Output Voltage Selection sections).

Note 3: Guaranteed by design. Not production tested.

Note 4: Specifications to -40°C are guaranteed by design, not production tested.

Typical Operating Characteristics

otherwise noted.)

50

1

1000

100

10

STEP-UP REGULATOR EFFICENCY

100

70

60

90

80

LOAD CURRENT (mA)

A

B

C

1

10

100

1000

STEP-UP REGULATOR OUTPUT VOLTAGE

LOAD CURRENT (mA)

9.1

8.5

8.6

8.7

8.8

8.9

9.0

100

50

110

100

1000

STEP-UP REGULATOR EFFICIENCY

60

LOAD CURRENT (mA)

70

80

90

A

B

C