Adjustable Shunt Regulator

B3431









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Package Information Ordering & Marking Information












Description

The Bay Linear B3431 is a three terminal adjustable shunt
regulator with thermal stability over
Temperature range. Using two external resistors allows the
output voltage to be adjusted from 2.5V to 36V. With a sharp
turn on characteristics the B3431 a superior replacement for
zener diode applications.

The B3431 shunt regulator has a tolerance of 0.5% which has
proven to be sufficient to overcome all of the other errors in
the system to virtually eliminate the need for trimming in the
power supply manufacturers assembly line and contribute a
significant cost savings.


Features

• Wide Operating Range …1mA to100mA
• Tight Band Gap Tolerance ….….…0.5%
• Low Temp. Coefficient…...…...30 ppm/
o
C
• Wide temp range of –40 to +105
o
C
• Available in SOT-23 package
Applications
• Switching Power Supplies
• Adjustable Power Supplies
• Linear Regulators
• Battery Powered Equipment
• Monitors, TV, VCR
• Instrumentation

REFERENCE
CATHODE (K)
Bay Linear
Inspire the Linear Power
SOT-23-3 (K3) B3431
Top View
CATHODE
ANODE
REF
3
21
SOT-23-3 (K3) LM3431
Top View
3
21
ANODE
REFCATHODE

+

Bay Linear, Inc 2478Armstrong St., Livermore CA USA 9550 T

2.5V
-
(R)
ANODE (A)
Package Tolerance
0.5% 1% 2%
SOT-23 B3431AK3 B3431BK3 B3431CK3
el: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com