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B3431BK3 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 B3431BK3
기능 Adjustable Shunt Regulator
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B3431BK3 데이터시트, 핀배열, 회로
Bay Linear
Inspire the Linear Power
Adjustable Shunt Regulator
B3431
Description
Features
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.
Wide Operating Range …1mA to100mA
Tight Band Gap Tolerance ….….…0.5%
Low Temp. Coefficient…...…...30 ppm/oC
Wide temp range of –40 to +105oC
Available in SOT-23 package
Applications
Switching Power Supplies
Adjustable Power Supplies
Linear Regulators
Battery Powered Equipment
Monitors, TV, VCR
Instrumentation
Package Information
Ordering & Marking Information
SOT-23-3 (K3) LM3431
ANODE
3
12
CATHODE REF
Top View
SOT-23-3 (K3) B3431
ANODE
3
12
REF CATHODE
Top View
CATHODE (K)
Package
Tolerance
0.5%
1%
2%
SOT-23 B3431AK3 B3431BK3 B3431CK3
REFERENCE
(R)
+
-
2.5V
ANODE (A)
Bay Linear, Inc 2478Armstrong St., Livermore CA USA 9550
Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com




B3431BK3 pdf, 반도체, 판매, 대치품
Calculating Average Temperature Coefficient (TC)
B3431
00 0
-10
5000 0.5
VREF ∆Τ
-20
-55
-25 0 25 50 75
Temperature (°C)
0.06 mV/°C
0.002 %/°C
24 ppm/°C
100 125
TC in mV/°C = VREF (mV)
TA
TC in %/°C =
)VREF
VREF at 25°C
TA
x 100
TC in ppm/°C =
)VREF
VREF at 25°C
TA
x 106
Test Circuit
VIN
IREF
VKA = VREF
IK
VIN
R1
(VREF)
R2
VKA
IK
Figure 1a. Test Circuit 1
Figure 1b. Test Circuit 2
VIN VKA
IK (OFF)
Figure 1c. Test Circuit 3
Bay Linear, Inc 2478Armstrong St., Livermore CA USA 9550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

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B3431BK3 전자부품, 판매, 대치품
TYPICAL PERFORMANCE CURVES
B3431
Dynamic Output Impedance
100
TA = 25 °C
IK = 1 to 100 mA
10
1.0
0.1
0.01
1k
10 k 100 k 1 M
f - Frequency (Hz)
Figure 10
10 M
Small Signal Voltage Gain vs. Frequency
70
Temperature Range: -0 to 105 °C
60
IK = 10 mA
50
40
15 k IK
9 µF
30
20 8.25 k
10
0
1k
10 k 100 k 1 M 10 M
f - Frequency (Hz)
Figure 11
OUT
230
GND
Bay Linear, Inc 2478Armstrong St., Livermore CA USA 9550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

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휴대전화 : 010-3582-2743


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부품번호상세설명 및 기능제조사
B3431BK3

Adjustable Shunt Regulator

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