Digitally Adjustable LCD Bias Supplies

4

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Operating mode, output in regulation

µA

150

250

0µA

No load

REF Load Regulation

Voltage on POK rising

V

FB = 0V - 50mV

3.0

5.5

4V

≤ 12V

FB = REF + 100mV

POL = AGND, 3.0V

mV

510

V

1.44

1.5

1.56

REF Voltage

V

27

Positive Output Voltage

0.957

0.992

1.027

20

-10

120

FB Input Current (Note 3)

V

-30

10

mV

-10

0

10

V

1.5

2.8

Undervoltage Lockout Threshold (Note 1)

nA

1.44

1.5

1.56

µs-V

Microsecond-Volt Time Constant (k-factor)

16

24

V

1.8

20

BATT Operating Range (Note 2)

-27

Negative Output Voltage

FB Regulation Voltage

V

POK Threshold Voltage

DOUT Maximum Output Voltage (Note 3)

V

REF -

REF +

0.02

0.02

0µA

-20µA

DOUT Minimum Output Voltage (Note 3)

V

0

0.01

Guaranteed monotonic

DOUT Differential Nonlinearity

LSB

±

1

UP, DN, SHDN, POL Input High Voltage

3.0V

1.4

2.3

V

UP, DN, SHDN, POL Input Low Voltage

0.6

V

3.0V

1.4

2.3

SCL, SDA, SUS Input Low Voltage

0.6

V

SDA Output Low Voltage

0.4

V

CONDITIONS

UNITS

MIN

TYP

MAX

PARAMETER

ELECTRICAL CHARACTERISTICS

temperature range are guaranteed by design.)

V

SCL, SDA, SUS Input High Voltage

V

SWITCHING REGULATOR

REFERENCE AND OUTPUT

DIGITAL INPUTS AND OUTPUTS