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1998

BiCMOS INTEGRATED CIRCUIT

µµµµ PC1933

DC-DC CONVERTER CONTROL IC

DATA SHEET

Document No. G13690EJ3V0DS00 (3rd edition)

Date Published April 2000 NS CP (K)

Printed in Japan

The mark 5 shows major revised points.

DESCRIPTION

The

µ PC1933 is an IC that controls a low-voltage input DC-DC converter. This IC is suitable for an operation with3-V,

3.3-V input or a lithium ion secondary battery input, because the minimum operating supply voltage is 2.5 V.

Because of its wide operating voltage range, it can also be used to control DC-DC converters that use 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)

• Timer latch circuit for short-circuit protection.

• Ceramic capacitor with low capacitance (0.1

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

• Open drain output (1 cannel: This output can be used to control a step-down converter, a step-up converter.)

• Dead time is internally fixed to 85 %.

• Soft start function (with a circuit to convert the timer latch circuit.)

ORDERING INFORMATION

Part Number

Package

µ PC1933GR

8-pin plastic SOP (5.72 mm (225))