ISSUED DATE :2004/02/23
REVISED DATE :2004/10/21C
G432
Description
Adjustable Shunt Regulator
The G432 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 (V
REF
)
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 G432 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 D
0.5% ,
B Rank: 1.24V D ,
1%
C Rank: 1.24V D
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
REF.
A
B
C
D
E
F
Millimeter
Min.
Max.
2.70
3.10
2.40
2.80
1.40
1.60
0.35
0.50
0
0.10
0.45
0.55
REF.
G
H
K
J
L
M
Millimeter
Min.
Max.
1.90 REF.
1.00
1.30
0.10
0.20
0.40
-
0.85
1.15
0C
10 C
Typical Application Circuit
Block Diagram
Symbol
G432
1/5
ISSUED DATE :2004/02/23
REVISED DATE :2004/10/21C
Absolute Maximum Ratings at Ta = 25 :
Parameter
Junction Temperature
Storage Temperature
Cathode Voltage
Continuous Cathode Current
Reference Input Current Range
Total Power Dissipation
Symbol
Tj
Tstg
V
KA
I
KA
I
REF
P
D
Ratings
+150
-65 ~ +150
20
-10~+250
-0.05~+10
225
V
mA
mA
mW
Unit
Electrical Characteristics
(Ta = 25 : ,unless otherwise specified.)
Parameter
Reference Voltage
G432C
G432B
G432A
Deviation of reference Input Voltage
Over temperature(note1)
Ratio of Change in Reference Input
Voltage to the Change in Cathode
Voltage
Reference Input Current
Deviation of reference Input Current
Over Temperature Range
Minimum Cathode Current for
Regulation
Off-State Cathode Current
Dynamic Output Impedance
(note2)
V
REF
/ T
V
REF
Symbol
Min
1.215
1.228
1.234
-
Typ.
1.24
1.24
1.24
3.0
Max.
1.265
1.252
1.246
20
mV
V
Unit
Test Conditions
V
KA
= V
REF
, I
K
=10mA
(Fig.1)
V
KA
= V
REF
, I
K
=10mA
Ta=Full range (Fig.1)
I
K
=10mA
(Fig.2)
V
KA
=20V~V
REF
(Fig.2
)
V
REF
/ V
KA
I
REF
Ø I
REF
I
KA
(min)
I
KA(off)
Z
kA
‡
-
-
-
-
-
-
-1.4
1.4
0.4
0.15
0.1
0.2
-2.0
3.5
1.2
0.3
1.0
0.5
mV/V
uA
uA
mA
uA
I
K
=10mA,R1=10K ,R2=
I
K
=10mA,R1=10K ,R2=
Ta=Full range(Fig.2)
V
KA
=V
REF
(Fig.1)
V
KA
=20V,V
REF
=0 (Fig.3)
V
KA
=V
REF
, I
K
=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.
The average temperature coefficient of the reference input voltage Ø VREF is defined as:
Where:
T2 – T1 = full temperature change.
Ø VREF can be positive or negative depending on whether the slope is positive or negative.
Note2. The dynamic output impedance, RZ, is defined as:
G432
2/5
ISSUED DATE :2004/02/23
REVISED DATE :2004/10/21C
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
G432
3/5
ISSUED DATE :2004/02/23
REVISED DATE :2004/10/21C
G432
4/5
ISSUED DATE :2004/02/23
REVISED DATE :2004/10/21C
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
G432
5/5
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