B3431

Manufacturer Part NumberB3431
DescriptionAdjustable Shunt Regulator
ManufacturerETC
B3431 datasheet
 
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Bay Linear
Bay Linear
Bay Linear
Bay Linear
Inspire the Linear Power
Inspire the Linear Power
Inspire the Linear Power
Inspire the Linear Power
Adjustable Shunt Regulator
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.
Package Information
SOT-23-3 (K3) B3431
SOT-23-3 (K3) B3431
SOT-23-3 (K3) B3431
SOT-23-3 (K3) LM3431
SOT-23-3 (K3) LM3431
SOT-23-3 (K3) LM3431
ANODE
ANODE
ANODE
3
3
3
1
1
1
2
2
2
CATHODE
CATHODE
CATHODE
REF
REF
REF
Top View
Top View
Top View
REFERENCE
+
(R)
-
2.5V
Bay Linear, Inc
2478Armstrong St., Livermore CA USA 9550
Features
Wide Operating Range …1mA to100mA
Tight Band Gap Tolerance ….….…0.5%
Low Temp. Coefficient…...…...30 ppm/
Wide temp range of –40 to +105
Available in SOT-23 package
Applications
Switching Power Supplies
Adjustable Power Supplies
Linear Regulators
Battery Powered Equipment
Monitors, TV, VCR
Instrumentation
Ordering & Marking Information
Package
ANODE
ANODE
ANODE
3
3
3
SOT-23
1
1
1
2
2
2
REF
REF
REF
CATHODE
CATHODE
CATHODE
Top View
Top View
Top View
CATHODE (K)
ANODE (A)
Tel: (925) 606-5950, Fax: (925) 940-9556
B3431
o
C
Tolerance
0.5%
1%
2%
B3431AK3
B3431BK3
B3431CK3
www.baylinear.com
o
C

B3431 Summary of contents

  • Page 1

    ... 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 ...

  • Page 2

    ... I = 1mA to 100mA Z ( REF Tel: (925) 606-5950, Fax: (925) 940-9556 B3431 Maximum Units 150 z 10 750 D 775 200 575 JA 175 160 -40 to +150 J -65 to +150 300 2 V B3431 0.5% Min Typ Max 2.490 2.50 2.515 4 17 -2.7 -1.0 -2.0 -0.4 0.3 0.7 4 0.4 1.2 0.1 1 0.20 0.50 0.4 1 www.baylinear.com C ...

  • Page 3

    ... F <1kHz REF ( 1mA to 100mA Z ( REF Tel: (925) 606-5950, Fax: (925) 940-9556 B3431 B3431 1% Min Typ Max 2.474 2.50 2.526 4 17 -2.7 -1.0 -2.0 -0.4 0.3 0.7 4 0.4 1.2 0.1 1 0.20 0.50 0.4 1 B3431 2% Min Typ Max 2.445 2.495 2.545 4 17 -2.7 -1.0 -2.0 -0.4 0.3 0.7 4 0.4 1.2 0.1 1 0.20 0.50 0.4 1 www.baylinear.com Units Units ...

  • Page 4

    ... St., Livermore CA USA 9550 Bay Linear, Inc V REF 100 125 = V V REF REF R 2 Figure 1b. Test Circuit 2 Tel: (925) 606-5950, Fax: (925) 940-9556 B3431 V (mV) REF TC in mV/° REF V at 25°C REF TC in %/° REF V at 25°C REF TC in ppm/° ...

  • Page 5

    ... Tel: (925) 606-5950, Fax: (925) 940-9556 B3431 High Current Operating Characteristics REF Temperature Range 105 ° Cathode Voltage (V) KA Figure 3 Reference Voltage vs. Ambient Temperature REF 2.500 °C ...

  • Page 6

    ... Low Frequency Dynamic Output Impedance 0.150 0.125 0.100 0.075 0.050 0.025 0.0 -60 - 100 k Tel: (925) 606-5950, Fax: (925) 940-9556 B3431 Reference Voltage Line Regulation 0 °C 25 °C 75 °C 105 ° Cathode Voltage (V) KA Figure ...

  • Page 7

    ... Dynamic Output Impedance 100 ° 100 1.0 0.1 0. 100 Frequency (Hz) Figure 10 Temperature Range 105 ° 100 Figure 11 Tel: (925) 606-5950, Fax: (925) 940-9556 B3431 OUT 230 8.25 k GND www.baylinear.com ...

  • Page 8

    ... C - Load Capacitance (pF) L 2478Armstrong St., Livermore CA USA 9550 Bay Linear, Inc f = 100 kHz Figure Figure 13 Tel: (925) 606-5950, Fax: (925) 940-9556 B3431 INPUT MONITOR 220 OUT 50 GND 150 www.baylinear.com C L ...

  • Page 9

    ... St., Livermore CA USA 9550 Bay Linear, Inc 0.047 - 0.055 0.083 - 0.098 (1.194 - 1.397) (2.108 - 2.489) 0.035 - 0.040 (0.889 - 1.016) 0.070 - 0.080 (1.778 - 2.032) 0.003 - 0.005 (0.076 - 0.127) 0.030 - 0.041 (0.762 - 1.041) Tel: (925) 606-5950, Fax: (925) 940-9556 B3431 0.018 - 0.024 (0.457 - 0.610) www.baylinear.com ...