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1998

BiCMOS INTEGRATED CIRCUIT

DC-DC CONVERTER CONTROL IC

DATA SHEET

Document No. G13418EJ3V0DS00 (3rd edition)

Date Published March 2000 NS CP (K)

Printed in Japan

The mark 5 shows major revised points.

DESCRIPTION

The

µ PC1935 is a low-voltage input DC-DC converter control IC that can configure a three-output (step-up × 2, inverted

output

× 1) DC-DC converter at an input voltage of 3, 3.3, or 5 V.

Because of its wide operating voltage range, this IC can also be used to control DC-DC converters using an AC adapter

for input.

FEATURES

• Low supply voltage: 2.5 V (MIN.)

• Operating voltage range: 2.5 to 20 V (breakdown voltage: 30 V)

• Can control three output channels.

• Timer latch circuit for short-circuit protection.

• Ceramic capacitor with low capacitance (0.1

µ F) can be used for short-circuit protection.

• Dead times of channels 2 (step-up) and 3 (inverted output) can be set from external resistors. Dead time of channel 1

(step-up) is internally fixed to 85 %.

• Soft start of each channel can be set independently.

• Each channel can be turned ON/OFF independently.

ORDERING INFORMATION

Part Number

Package

µ PC1935GR

16-pin plastic TSSOP (5.72 mm (225))