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APL431L 데이터시트 PDF




ANPEC에서 제조한 전자 부품 APL431L은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 APL431L 기능
기능 Low Voltage Adjustable Precision Shunt Regulator
제조업체 ANPEC
로고 ANPEC 로고


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APL431L 데이터시트, 핀배열, 회로
APL431L
Low Voltage Adjustable Precision Shunt Regulator
Features
General Description
Precise Reference Voltage to 1.24V
Guaranteed 0.5%, 1% or 1.5% Reference Voltage
Tolerance
Sink Current Capability, 80uA to 100mA
Quick Turn-on
Adjustable Output Voltage, VO = VREF to 20V
Low Operational Cathode Current, 80µA Typical
0.1Typical Output Impedance
SOT-23-3, SOT-23-5, TO-92 and SOT-89
Packages
Lead Free and Green Devices Available
(RoHS Compliant)
Applications
Linear Regulators
Adjustable Power Supply
Switching Power Supply
The APL431L is a 3-terminal low voltage adjustable
precision reference with specified thermal stability
over applicable commercial temperature ranges.
Output voltage may be set to any value between
VREF (1.24 V) and 20 V with two external resistors
(see Figure 2). When used with an photocoupler,
the APL431L is an ideal voltage reference in isolated
feedback circuits for 3V to 12V switching-mode
power supplies. This device has a typical output
impedance of 0.1W. Active output circuitry provides
a very sharp turn-on characteristic, making the
APL431L excellent replacements for zener diodes
in many applications, including on-board regulation
and adjustable power supplies.
Pin Configuration
Symbol
Anode
REF
Cathode
ANODE
3
12
REF CATHODE
NC NC
54
123
REF ANODE CATHODE
Functional Diagram
Cathode
REF
Vref
3 CATHODE
2 ANODE
1 REF
123
REF ANODE CATHODE
Anode
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. B.10 - Mar., 2008
1
www.anpec.com.tw




APL431L pdf, 반도체, 판매, 대치품
APL431L
Test Figures (Cont.)
VIN
R1
IREF
Vo
IK
R2 VREF
Figure 3. Test Circuit for V >V ,
KA REF
VO= VKA= VREF× (1+R1/R2) + IREF × R1
Application Circuits
RB
VIN
R1
VREF
R2
Vo
Precision Voltage Reference
VIN
RB
Vo
R1
C1
VREF
R2
Precision High-Current Series Regulator
Notes for Application Circuits:
1) For the series regulator applications, add a compensation capacitor C1 between CATHODE and REF is
strongly recommended to improve the stability of output voltage .
2) Set VO according to the following equation: VO = VREF(1+R1/R2)+lREF xR1
3) Choose the value for RB as follows:
A) The maximum limit for R should be such that the cathode current (l ) is greater than the minimum
BK
operating
current
(80µA)
at
V.
IN(MIN)
B) The minimum limit for R should be such that the cathode current (l ) does not exceed 100mA under all
BK
load conditions, and the instantaneous turn-on value for lK does not exceed 150mA.
Copyright © ANPEC Electronics Corp.
Rev. B.10 - Mar., 2008
4
www.anpec.com.tw

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APL431L 전자부품, 판매, 대치품
APL431L
Typical Characteristics
Gain vs. Phase Shift vs. Frequency
60
50
40
30
20
10
0
-10
10
IKA=10mA
TA =25°C
0
50
100
150
200
250
300
350
100 1000 10000 100000 1000000
Frequency (Hz)
Stability Boundary Conditions
100
90
Unstable
TA =25°C
VKA =VREF
80 VKA =2.5V
70 VKA =3.3V
60
50
40
30 Stable
20
10
0
0.0001
0.001
0.01
0.1
1
CL-Load Capacitance (µF)
VIN
5V
10uF
180
6.8k
4.3k
Vo
Gain & Phase Test Circuit
100
VIN
Vo
IK
CL
Stability Test Circuit for V =V
KA REF
100
VIN
Vo
IK
R1 CL
R2
Copyright © ANPEC Electronics Corp.
Rev. B.10 - Mar., 2008
Stability Test Circuit for VKA>VREF,
VO= VKA= VREF× (1+R1/R2) + IREF × R1
Use the MLCC for CL
7 www.anpec.com.tw

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