DAC-Controlled Boost/Inverter

LCD Bias Supply with Internal Switch

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.

Voltage

PGND to GND .....................................................-0.3V to +0.3V

LX, LCDON to GND..............................................-0.3V to +30V

Current

LX (sinking) .....................................................................600mA

LCDON (sinking)...............................................................10mA

QSOP (derate 8.30mW/°C above +70°C) ......................667mW

Operating Temperature Ranges

MAX686C/D ..........................................................0°C to +70°C

MAX686EEE.......................................................-40°C to +85°C

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

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

SHDN = GND

Rising or falling

CONDITIONS

µA

1.3

4

Shutdown Current

µA

65

125

V

2.7

5.5

Supply Voltage (Note 1)

Supply Current

V

28

LX Voltage Range

%/mA

0.01

Load Regulation

%/V

0.1

Line Regulation

V

2.10

2.5

2.65

mV

100

Hysteresis

V

0.5

1.5

2.1

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

A

0.42

0.50

0.58

LX Switch Current Limit

ISET = GND

0.21

0.25

0.29

µA

1.5

LX Leakage Current

Ω

0.6

1.2

LX On-Resistance

0.8

1.6

µs

8

10

12

Maximum LX On-Time

µs

0.8

1

1.2

Minimum LX Off-Time

2.8

3.5

4.2

4

5

6

4

5

6

Voltage applied to L1

V

0.8

Input Voltage

LX