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©

1994, 2000

BIPOLAR ANALOG INTEGRATED CIRCUIT

ADJUSTABLE PRECISION SHUNT REGULATORS

DATA SHEET

Document No. G10239EJ3V0DS00 (3rd edition)

(Previous No. IC-3454)

Date Published March 2000 NS CP (K)

Printed in Japan

The mark

shows major revised points.

DESCRIPTION

The

µ PC1943,1944 are adjustable precision shunt regulators with guaranteed thermal stability. The output voltage can

be set to any value between reference voltage (1.26 V) and 24 V by two external resistors.

These ICs can apply to error amplifier of switching regulators.

FEATURES

• Low voltage operation and High accuracy.

• Adjustable output voltage by two external resistors.

• Pin compatible to

µ PC1093.

± 2.4 %

ORDERING INFORMATION

BLOCK DIAGRAM

Part Number

Package

µ PC1943T

µ PC1944T

µ PC1944J

µ PC1944GR

Power mini mold (SOT-89)

Power mini mold (SOT-89)

3-pin plastic SIP (TO-92)

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

K

A

REF

PIN CONFIGURATION (Marking Side)

K

K

K: Cathode

NC

NC

NC

A

REF

K

A

A

REF

REF

REF: Reference

NC

A

A: Anode

NC

NC: No Connection

µPC1944J

3-pin plastic SIP (TO-92)

µPC1944GR

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

µPC1943T

µPC1944T

Power mini mold (SOT-89)

1

1

2

2

3

3

45

6

7

8

K

A

A

REF

1

12

3

2

3