DATA SHEET

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BIPOLAR ANALOG INTEGRATED CIRCUIT

µµµµPC2250 SERIES

LOW-SATURATED STABILIZED POWER SUPPLY WITH SYSTEM RESET PIN

Document No. G14451EJ2V0DS00 (2nd edition)

Date Published December 1999 N CP(K)

Printed in Japan

DATA SHEET

©

1999

DESCRIPTION

The

µPC2250 series is a collection of low-saturated 4-pin stabilized power supplies with a pin that outputs a reset

signal when a drop in the input voltage is detected.

Because the reverse leakage current of these power supplies is about 1

µA even if a voltage is applied to the

output pin when the input voltage is cut off, these power supplies are ideal for systems with on-board

microprocessors requiring battery backup.

FEATURES

PIN CONFIGURATION (Marking Side)

•

Low minimum voltage difference between input and output

VDIF = 0.15 V TYP. (at IO = 40 mA)

•

Outputs reset signal (active-low) when the input voltage or

output voltage drops.

•

Low reverse leakage current during back up

IOLK = 1

µA TYP.

•

Low circuit operating current under no load

IBIAS = 1.3 mA TYP.

ORDERING INFORMATION

Part Number

Package

Output Voltage

µPC2251H

4-pin plastic SIP (TO-126)

3 V

µPC2253H

4-pin plastic SIP (TO-126)

5 V (TYPE1)

µPC2255H

4-pin plastic SIP (TO-126)

5 V (TYPE2)

BLOCK DIAGRAM

OUTPUT

INPUT

Reference

voltage circuit

Overcurrent

limiter circuit

Reset circuit

Error

amplifier

circuit

GND

RESET

Starter

circuit

4-pin plastic SIP (TO-126)

µPC2251H, 2253H, 2255H

1: INPUT

2: RESET

3: GND

4: OUTPUT

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