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부품번호 | ZR431L 기능 |
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기능 | ADJUSTABLE PRECISION ZENER SHUNT REGULATOR | ||
제조업체 | Zetex Semiconductors | ||
로고 | |||
전체 7 페이지수
ADJUSTABLE PRECISION
ZENER SHUNT REGULATOR
Issue 1 - NOVEMBER 1998
DEVICE DESCRIPTION
The ZR431L is a three terminal adjustable
shunt regulator offering excellent
temperature stability and output current
handling capability up to 25mA. The output
voltage may be set to any chosen voltage
between 1.24 and 10 volts by selection of
two external divider resistors.
The devices can be used as a replacement
for zener diodes in many applications
requiring an improvement in zener
performance.
The ZR431L is particularly used in the
feedback control loop of switch mode power
supplies. In this application the device 1.24
volt reference enables the generation of low
voltage supplies, typically 3.3 volts or 3 volts.
SCHEMATIC DIAGRAM
Vref
ZR431L
FEATURES
• Surface mount SOT23 package
• TO92 package
• 2.5% and 1% tolerance
• Maximum temperature coefficient 50
ppm/°C
• Temperature compensated for
operation over the full temperature
range
• Programmable output voltage
• 100µA to 25mA current sink capability
• Low output noise
APPLICATIONS
• Shunt regulator
• Series regulator
• Voltage monitor
• Over voltage/ under voltage protection
• Switch mode power supplies
VZ
Gnd
ZR431L
TYPICAL CHARACTERISTICS
140
130
Vref = Vz
Iz= 10mA
120
110
100
90
80
-40
-20
0 20 40 60 80
Temperature (° C)
Reference Current v Temperature
0
Iz 10mA
-1
-2
-3
-4
-5
-6
-7
-8
-9
0
2 4 6 8 10 12
Cathode Voltage (V)
Change in Vref v Cathode Voltage
26
Vref = Vz
24
22
20
18
16
14
-40
-20
0 20 40 60
Temperature (° C)
Cathode Current v Temperature
80
100
10
1
Vref = Vz
1mA
10mA
0.1
100
1k
10k
Frequency (Hz)
Dynamic Impedance v Frequency
100k
1.244
1.242
1.240
Iz= 10mA
1.238
1.236
1.234
1.232
-40
-20
0 20 40 60
Temperature (° C)
Reference Voltage v Temperature
80
1.0
TO92
SOT23
0
25 50 75 85
Ambient Temprature (° C)
Power Dissipation Derating
100
4페이지 ZR431L
60
50
40
30
20
10
0
100
TYPICAL CHARACTERISTICS
Iz =10mA
47k
10µ.
1Z
47k
VZ
"Ω
+
-
1k 10k
Frequency (Hz)
Gain v Frequency
100k IZ = 10mA, TA = 25°C
Test Circuit for Open Loop Voltage Gain
2.0
1.0
0
5.0
2.5
0
Repetitive
Pulse
Single
Pulse
Vz
INPUT
Input Monitor
120Ω
VZ
Pulse
Generator
50Ω
TA = 25°C
0 100 200 300 400 500
Time (µs)
Pulse Response
Test Circuit for Pulse Response
30
25
20
STABLE
15
UNSTABLE
STABLE
10
5
0
10p 100p 1n 10n .1µ
1µ 10µ
Load Capacitance(F)
Stability Boundary Conditions
Vref < VZ < 10, IZ = 10mA, TA = 25°C
Input
150Ω
1Z
10k
8Z
100µF
Test Circuit for Stability
Boundary Conditions
7페이지 | |||
구 성 | 총 7 페이지수 | ||
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부품번호 | 상세설명 및 기능 | 제조사 |
ZR431 | ADJUSTABLE PRECISION ZENER SHUNT REGULATOR | Zetex Semiconductors |
ZR431 | ADJUSTABLE PRECISION ZENER SHUNT REGULATOR | Diodes |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |