369
Regulator ICs
Power supply unit for LCD drives
BP5311
The BP5311 is a DC-DC converter unit for supplying power to liquid crystal display (LCD) panels. The unit supplies a
positive voltage for LCDs from a logic circuit power supply (
)
5V)
F
Applications
LCD panels in personal computers and word processors
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Features
1) High conversion efficiency.
2) Built-in protection circuit.
3) Built-in ON / OFF switch.
4) Compact and light.
5) Surface mounting is possible because parts are con-
centrated on one side.
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Absolute maximum ratings (Ta = 25
_
C)
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Block diagram
370
Regulator ICs
BP5311
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Pin descriptions
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Electrical characteristics
(unless otherwise noted, Ta = 25
_
C, V
CTL
= 5V, and R1 and R2 resistors are disconnected)
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