Estek ET431 Three-terminal adjustable regulator Datasheet

Description
The ET431 is a three-terminal adjustable regulator series with a guaranteed thermal stability over applicable
temperature ranges. The output voltage may be set to any value between Vref (approximately 2.5 volts) and
36 volts with two external resistors. The devices have a typical dynamic output impedance of 0.2
. Active
output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacement for
zener diodes in many applications. The ET431 is characterized for operation from -0 ℃to +70℃
Features
A
 Programmable Output Voltage to 36V
 Low Dynamic Output Impedance 0.2
 Sink Current Capability of 0.1 mA to 100 mA
 Equivalent Full-Range Temperature Coefficient of
ET431
ET431
50 ppm/oC
 Temperature Compensated for Operation over Full Rated
Operating Temperature Range
 Low Output Noise
 Fast Turn on
R
R
A K
TO –92
K
SOT –23
Package
FUNCTIONAL
BLOCK DIAGRAM
SYM BOL
Cathode
Reference
Cathode
Reference
Anode
Anode
BEIJING ESTEK ELECTRONICS CO.,LTD
1
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified)
Characteristic
Symbol
Value
Unit
Cathode Voltage
Cathode Current Range (Continuous)
VKA
IK
36
-100 ~ 150
V
mA
Reference Input Current Range
IREF
0.05 ~ 10
mA
o
Power Dissipation at 25 C:
TO –92 Package
SOT –23 –3
Package
o
C/W)
Junction Temperature Range
Operating Temperature Range
TJ
Tg
Storage Temperature Range
Tstg
PD
0.7
0.2
W
W
o
0 ~ 150
o
C
C
o
C
0 ~ 70
-65 ~ +150
Electrical Characteristics
(Ta = 25oC,
VKA = VREF,
IK = 10mA)
Characteristic
Reference Input Voltage
Symbol
Test Condition
Min
Typ
Max
Unit
VREF
0.5%
1.0%
2.483
2.470
2.495
2.507
2.520
V
3
17
mV
mV/V
Deviation of Reference Input
Voltage Over Full Temperature Range
VREF(de v)
Ratio of Change in Reference Input
Voltage to the Change in Cathode
Voltage
V R EF
VKA
Tmin≤ Ta≤Tmax ᆪ
VKA = 10V-VREF
-1.4
-2.7
VKA = 36V- 10V
-1.0
-2.0
IREF
R1 = 10K, R2 =∞ ᆪ
1.8
4
A
Deviation of Reference Input
Current Over Full Temperature
Range
IREF(dev)
R1 = 10K, R2 = ∞ᆪ
0.4
1.2
A
Minimum Cathode Current for
Regulation
IK(min)
0.25
0.5
mA
0.26
0.22
1.0
0.5
A
ohm
Reference Input Current
Off-State Cathode Current
Dynamic Impedance

IK(off)
ZKA
IK = 1
VKA = 36V,
VREF = 0
mA to 100 mA , f ,ᆪ
1.0KHz
BEIJING ESTEK ELECTRONICS CO.,LTD
2
TEST CIRCUITS
Ordering Information
OR DERI NG NU MB ER
431
Address :
P ACK AGE
TO-92
/
SOT-23
M ARKI NG
ET431 / 431
6A06--6A07
Rm 6A07,Changyin Office Building ,No.88,Yong Ding Road,Hai Dian District ,Beijing
Postalcode:100039
Tel: 86-010-58895780 / 81 / 82 / 83 / 84
Fax : 010-58895793
Http://www.estek.com.cn
Email:[email protected]
REV No:01-060807
BEIJING ESTEK ELECTRONICS CO.,LTD
3
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