UPC1943 Datasheet, PDF (1/12 Pages) NEC – ADJUSTABLE PRECISION SHUNT REGULATORS

DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUIT
µ PC1943,1944
ADJUSTABLE PRECISION SHUNT REGULATORS
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.
VREF = 1.26 V ± 2.4 %
VREF ≤ VOUT ≤ 24 V
ORDERING INFORMATION
BLOCK DIAGRAM
Part Number
Package
K
µ PC1943T
Power mini mold (SOT-89)
µ PC1944T
Power mini mold (SOT-89)
REF
µ PC1944J
3-pin plastic SIP (TO-92)
µ PC1944GR
8-pin plastic SOP (5.72 mm (225))
A
PIN CONFIGURATION (Marking Side)
Power mini mold (SOT-89)
µ PC1943T
µ PC1944T
A
A
123
REF A K
123
K A REF
3-pin plastic SIP (TO-92)
µ PC1944J
3-pin plastic SOP (5.72 mm (225))
µ PC1944GR
1 23
K1
NC 2
NC 3
NC 4
8 REF
7 NC
6A
5 NC
REF A K
A: Anode
K: Cathode
REF: Reference
NC: No Connection
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for
availability and additional information.
Document No. G10239EJ3V0DS00 (3rd edition)
(Previous No. IC-3454)
The mark shows major revised points.
Date Published March 2000 NS CP (K)
©
Printed in Japan
1994, 2000