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PDF AP431 Data sheet ( Hoja de datos )
| Número de pieza | AP431 | |
| Descripción | Adjustable Precision Shunt Regulator | |
| Fabricantes | Anachip | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AP431 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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Adjustable Precision Shunt Regulator
AP431/AP431A
Features
Description
• Precision reference voltage
AP431 : 2.495V ± 1%
AP431A : 2.495V ± 0.5%
• Sink current capability: 200mA
• Minimum cathode current for regulation: 300μA
• Equivalent full-range temp coefficient: 30 ppm/oC
• Fast turn-on response
• Low dynamic output impedance: 0.2Ω
• Programmable output voltage to 36v
• Low output noise.
• Packages: TO92, SOT89, SOT23, SOT25 and
SOP
The AP431/AP431A are 3-terminal adjustable
precision shunt regulators with guaranteed
temperature stability over the applicable extended
commercial temperature range. The output voltage
may be set at any level greater than 2.495V(VREF)
up to 36V merely by selecting two external resistors
that act as a voltage divider network. These devices
have a typical output impedance of 0.2Ω. Active
output circuitry provides very sharp turn-on
characteristics, making these devices excellent
improved replacements for Zener diodes in many
applications.
The precise (+/-) 1% Reference voltage tolerance of
the AP431/431A make it possible in many
applications to avoid the use of a variable resistor,
consequently saving cost and eliminating drift and
reliability problems associated with it.
Ordering Information
A P 4 3 1XXXXX
Operating Temp. Range
Blank : -20oC~85oC
I : -40oC~85oC
Reference Voltage
Tolerance:
Blank : +/- 1%
A : +/- 0.5%
Package
Lead Free
Blank : SOP-8L Blank : Normal
Y : SOT89-3L L : Lead Free Package
V : TO92-3L
W : SOT23-3L
R : SOT23-3L
Q : SOT25
Packing
Blank : Tube or bulk
A : Taping
Typical Application Circuit
VIN
+
Cin
AP431
VOUT
R1 +
Cout
R2
VOUT = (1+R1/R2)VREF
Precision Regulator
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev.1.0 May.7, 2004
1/17
1 page  
Adjustable Precision Shunt Regulator
AP431/AP431A
Note 3. Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference over
the full temperature range.
The average temperature coefficient of the reference input voltage αVREF is defined as:
α VREF
=
(
VDEV
VREF (25°C)
)
⋅10
6
T2 − T1
……………………..………………..
(
ppm
°C
)
Where:
T2 – T1 = full temperature change.
αVREF can be positive or negative depending on whether the slope is positive or negative.
Note 4. The dynamic output impedance, RZ, is defined as:
Z KA
=
∆ V KA
∆ IKA
When the device is programmed with two external resistors R1 and R2 (see Figure 2.), the dynamic output
impedance of the overall circuit, is defined as:
ZKA '
=
∆v
∆i
≈ZKA
(1+ RR21)
Test Circuits
Input
IN
IN
VKA
IKA
VREF
R1 IREF
R2 VREF
IKA
VKA
VKA
IZ(OFF)
Fig1. Test Circuit for VKA= VREF
Note:VKA=VREF(1+R1/R2)+IREF× R1
Fig2. Test circuit for VKA＞VREF
Fig3. Test Circuit for off-state Current
Anachip Corp.
www.anachip.com.tw
Rev.1.0 May.7, 2004
5/17
5 Page 
Adjustable Precision Shunt Regulator
(2) TO92-3L Package Outline Dimension
A1
A
b1
Db
E
AP431/AP431A
b
e
L
Symbol
A
A1
b
b1
D
E
L
e
Dimensions In Millimeters
Min.
Nom.
Max.
3.302
3.556
3.810
1.016
-
-
0.330
0.381
0.432
0.406
0.457
0.506
4.445
4.572
4.699
4.445
4.572
4.699
13.00
- 15.500
1.150
1.270
1.390
Dimensions In Inches
Min.
Nom.
Max.
0.130
0.140
0.150
0.040
-
-
0.013
0.015
0.017
0.016
0.018
0.020
0.175
0.180
0.185
0.175
0.180
0.185
0.512 - 0.610
0.045
0.050
0.055
Anachip Corp.
www.anachip.com.tw
11/17
Rev.1.0 May.7, 2004
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet AP431.PDF ] | |
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