ETC2 GM432 Adjustable shunt regulator Datasheet

ISSUED DATE :2004/10/22
REVISED DATE :
GM432
Ad ju stabl e Shunt Regul ato r
Description
The GM432 series are three-terminal adjustable precision shunt regulators with guaranteed stable temperature over the
applicable extended commercial temperature range. The output voltage may be set at any level greater than 1.24V (VREF)
up to 20V merely by selecting two external resistors that act as a voltage divider network. These devices have a typical
output impedance of 0.2 . Active output circuitry provides very sharp turn-on characteristics, making these devices
excellent improved replacements for Zener diodes in many applications.
The precise +/- 2% reference voltage tolerance of GM432 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.
Features
*Precision reference voltage
A Rank: 1.24V 0.5% ,
B Rank: 1.24V 1% ,
C Rank: 1.24V 2.0%
*Sink current capability: 200 mA.
*Minimum cathode current for regulation: 150 A.
*Equivalent full-range temp coefficient: 30 ppm/ .
*Fast turn-on Response.
*Low dynamic output impedance: 0.2 .
*Programmable output voltage to 20V.
*Low output noise.
Package Dimensions
SOT-89
REF.
A
B
C
D
E
F
Millimeter
Min.
Max.
4.4
4.6
4.05
4.25
1.50
1.70
1.30
1.50
2.40
2.60
0.89
1.20
REF.
G
H
I
J
K
L
M
Millimeter
Min.
Max.
3.00 REF.
1.50 REF.
0.40
0.52
1.40
1.60
0.35
0.41
5
TYP.
0.70 REF.
Typical Application Circuit
GM432
1/5
ISSUED DATE :2004/10/22
REVISED DATE :
Block Diagram
Symbol
Absolute Maximum Ratings at Ta = 25
Parameter
Symbol
Ratings
Unit
Junction Temperature
Tj
+150
Storage Temperature
Tstg
-65 ~ +150
Cathode Voltage
VKA
20
V
Continuous Cathode Current
IKA
-10~+250
mA
Reference Input Current Range
IREF
-0.05~+10
mA
Total Power Dissipation
PD
225
mW
Electrical Characteristics(Ta = 25
Parameter
Reference Voltage
,unless otherwise specified.)
Symbol
GM432C
GM432B
VREF
GM432A
Min
Typ.
Max.
1.215
1.24
1.265
1.228
1.24
1.252
1.234
1.24
1.246
Unit
Test Conditions
V
VKA= VREF , IK=10mA
(Fig.1)
VKA= VREF , IK=10mA
Ta=Full range (Fig.1)
Deviation of reference Input Voltage
Over temperature(note1)
VREF/ T
-
3.0
20
mV
Ratio of Change in Reference Input
Voltage to the Change in Cathode
Voltage
VREF/ VKA
-
-1.4
-2.0
mV/V
IREF
-
1.4
3.5
uA
IK=10mA,R1=10K ,R2=
-
0.4
1.2
uA
IK=10mA,R1=10K ,R2=
Ta=Full range(Fig.2)
IKA(min)
-
0.15
0.3
mA
VKA=VREF(Fig.1)
IKA(off)
-
0.1
1.0
uA
VKA=20V,VREF=0 (Fig.3)
ZkA
-
0.2
0.5
Reference Input Current
Deviation of reference Input Current
Over Temperature Range
Minimum Cathode Current for
Regulation
Off-State Cathode Current
Dynamic Output Impedance
(note2)
IREF
IK=10mA
(Fig.2)
VKA=20V~VREF
(Fig.2)
VKA=VREF, IK=1 ~100mA
F 1.0KHz(Fig.1)
Note1. Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference over the full
temperature range.
GM432
2/5
ISSUED DATE :2004/10/22
REVISED DATE :
The average temperature coefficient of the reference input voltage
VREF is defined as:
Where:
T2 – T1 = full temperature change.
VREF can be positive or negative depending on whether the slope is positive or negative.
Note2. The dynamic output impedance, RZ, is defined as:
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:
Test Circuits
Typical Performance Characteristics
GM432
3/5
ISSUED DATE :2004/10/22
REVISED DATE :
GM432
4/5
ISSUED DATE :2004/10/22
REVISED DATE :
Application Examples
Important Notice:
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of GTM.
GTM reserves the right to make changes to its products without notice.
GTM semiconductor products are not warranted to be suitable for use in life-support Applications, or systems.
GTM assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
Head Office And Factory:
Taiwan: No. 17-1 Tatung Rd. Fu Kou Hsin-Chu Industrial Park, Hsin-Chu, Taiwan, R. O. C.
TEL : 886-3-597-7061 FAX : 886-3-597-9220, 597-0785
China: (201203) No.255, Jang-Jiang Tsai-Lueng RD. , Pu-Dung-Hsin District, Shang-Hai City, China
TEL : 86-21-5895-7671 ~ 4 FAX : 86-21-38950165
GM432
5/5
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