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PDF GM431 Data sheet ( Hoja de datos )
| Número de pieza | GM431 | |
| Descripción | 2.5V ADJUSTABLE SHUNT REGULATOR | |
| Fabricantes | Gamma Microelectronics | |
| Logotipo |  |
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AA
MICROELECTRONICS
Power Management
GM431
2.5V ADJUSTABLE SHUNT REGULATOR
Description
The GM431 is a three terminal adjustable shunt regulator
with thermal stability guaranteed over temperature. Output
voltage can be adjusted to any value between 2.5V (Vref)
and 36V by using two external resistors. The GM431 has a
typical dynamic output impedance of 0.2W. Active output
circuitry provides a very unique turn on characteristic, mak-
ing the GM431 an excellent replacement for zener diodes
in many applications such as onboard regulation and ad-
justable power supplies. The GM431 is an ideal voltage ref-
erence for 3.0 to 3.3V switching power supplies.
The GM431 shunt regulator is available with 3 voltage tol-
erances 0.5%, 1.0% and 2.0% over TA= 0°C to + 70°C,
and four package options (SOT-23, TO-92, SOT-89 and
SOP-8). Whatever your application is, the GM431 offers
the optimum combination of performance, reliability, and
economy.
Features
Sink Current Capability 1 mA to 100mA
Low dynamic output impedance, 0.2W typ.
Low output noise
0.5%, 1% or 2% reference voltage tolerance
Alternate for TL431, TL431, LM431 & AS431
Temperature range 0°C to+ 70 °C
Available in SOT-23, TO-92, SOT-89 and
SOP- 8 packages
Application
Switching power supplies
Linear regulators
Adjustable supplies
LOGIC SYMBOL
REFERENCE
ANODE
CATHODE
Battery-operated computers
Computer disk drives
Instrumentation
BLOCK DIAGRAM (POSITIVE LOGIC)
CATHODE
REFERENCE
Vref
+
_
ANODE
www.gammamicro.com 1
1 page  
AA
MICROELECTRONICS
Power Management
GM431
2.5V ADJUSTABLE SHUNT REGULATOR
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted)
GM431A (0.5%)
PARAMETER
CONDITION
MIN
Reference Voltage
Vref
VKA = Vref, IK = 10 mA, TA = 25°C (1)
VKA=Vref,IK=10 mA,TA= 0 to 70°C(1)
Vref temp deviation
Vdev VKA = Vref, IK = 10 mA ,(1) TA = full range
Ratio of change in Vref
to change in VKA
DVref
DVKA
IK = 10mA
DVKA = 10V to Vref
DVKA = 36V to 10V
Reference input current Iref IK = 10mA, R1 = 10KW, R2 = (2)
Deviation of reference
input current over full
temperature range
Iref(dev)
IK = 10mA, R1 = 10KW, R2 =
TA = full range
(2)
2.487
-2.7
-2.0
Minimum operating
current
IK(min) VKA = Vref (1)
Off-state cathode
current
Dynamic impedance
IK(off)
VKA = 36V, Vref = 0V (3)
VKA = 16V, Vref = 0V (3)
| ZKA | f 1kHz,VKA=Vref, IK=1mA to 100mA (1)
TYP
2.500
4
-1.0
-0.4
0.7
0.4
0.4
0.1
0.2
MAX UNIT
2.512 V
17 mV
mV/V
4.0 mA
1.2 mA
1.0 mA
1
0.50
mA
W
GM431B (1.0%)
PARAMETER
CONDITION
MIN
Reference Voltage
Vref
VKA = Vref, IK = 10 mA, TA = 25°C (1)
VKA=Vref,IK=10 mA,TA= 0 to 70°C(1)
Vref temp deviation
Vdev VKA = Vref, IK = 10 mA ,(1) TA = full range
Ratio of change in Vref
to change in VKA
DVref IK = 10mA
DVKA
DVKA = 10V to Vref
DVKA = 36V to 10V
Reference input current Iref IK = 10mA, R1 = 10KW, R2 = (2)
Deviation of reference
input current over full
temperature range
Iref(dev)
IK = 10mA, R1 = 10KW, R2 =
TA = full range
(2)
2.475
-2.7
-2.0
Minimum operating
current
IK(min) VKA = Vref (1)
Off-state cathode
current
Dynamic impedance
NOTES:
(1) See test circuit 1 on page 5.
(2) See test circuit 2 on page 5.
(3) See test circuit 3 on page 5.
IK(off)
VKA = 36V, Vref = 0V (3)
VKA = 16V, Vref = 0V (3)
| ZKA | f 1kHz,VKA=Vref, IK=1mA to 100mA (1)
TYP
2.500
4
-1.0
-0.4
0.7
0.4
0.4
0.1
0.2
MAX UNIT
2.525 V
17 mV
mV/V
4.0 mA
1.2 mA
1.0 mA
1
0.50
mA
W
5
5 Page 
AA
MICROELECTRONICS
Power Management
GM431
2.5V ADJUSTABLE SHUNT REGULATOR
SOT-89 PACKAGE OUTLINE DIMENSIONS
R 0.13~4X
4.50 ± 0.05
1.650 REF
1.400 REF
1.50 ± 0.05
R 0.13~3X
NO DRAFT~2
Pad Layout
2
4.20 ± 0.05
2.5 ± 0.05
1.00 ± 0.07
1.50 1.50
6°~2X
3.00 ± 0.025
6°
0.46 ± 0.025
R 0.1 MAX
45°
0.38 ± 0.01
R 0.13~2X
1.5
Units: mm
0.7
1
6°~2X
R 0.13~2X
Unit: mm
SOT-23 PACKAGE OUTLINE DIMENSIONS
2.8 ± 0.1
5°
2.90 ± 0.1
0.4 ± 0.1
1.5 ± 0.05
0.95 ± 0.038
1.9 ± 0.05
0.65 ± 0.05
1.10 ± 0.1
0.13
0~0.1
Pad Layout
0.031
0.8
0.035
0.9
0.8 ± 0.05
0.079
2.0
0.037
0.95
0.037
0.95
Inches
( mm )
Unit: mm
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet GM431.PDF ] | |
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