TS431A ST Microelectronics, Inc., TS431A Datasheet

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TS431A

Manufacturer Part Number
TS431A
Description
Low Voltage Adjustable Shunt Reference
Manufacturer
ST Microelectronics, Inc.
Datasheet

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September 2003
DESCRIPTION
The TS431 is a low voltage three terminals pro-
grammable shunt Voltage Reference. The output
voltage can be set to any value between Vref
(1.24V) and 6V with two external resistors. The
TS431 is able to operate at a lower voltage
(1.24V) and lower cathode current than the wide-
spread TL431 and TL1431 shunt voltage refer-
ence.
When driving an optocoupler, the TS431 is partic-
ularly interesting to regulate 3.3V switching power
supplies.
PIN CONNECTIONS (top view)
LOW VOLTAGE OPERATION : 1.24 TO 6V
2%, 1% AND 0.5% VOLTAGE PRECISION
WIDE OPERATING RANGE CATHODE
CURRENT : 60 A TO 30mA
LOW OUTPUT IMPEDANCE : 0.2
TYPICALLY STABLE FOR ANY CAPACI-
TIVE LOADS
ESD PROTECTION :
2kV (Human Body Model)
200V (Machine Model)
100ppm/°C TEMPERATURE COEFFICIENT
LOW VOLTAGE ADJUSTABLE SHUNT REFERENCE
(Top view)
TO92
ORDER CODE
Z = TO92 Plastic package - also available in Bulk (Z), Tape & Reel (ZT)
LT = Tiny Package (SOT23-5) - only available in Tape & Reel (LT)
TS431AI
TS431BI
Number
TS431I
and Ammo Pack (AP)
Part
-40°C, +125°C
Temperature
(Plastic Micropackage)
Range
(Plastic Package)
(Top view)
SOT23-5
SOT23-5
TO92
Z
L
Package
Z
L
TS431
Marking
SOT-23
L272
L271
L270
1/9

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TS431A Summary of contents

Page 1

... SOT23-5 (Plastic Micropackage) ORDER CODE Package Part Temperature Number Range TS431I TS431AI -40°C, +125°C TS431BI Z = TO92 Plastic package - also available in Bulk (Z), Tape & Reel (ZT) and Ammo Pack (AP Tiny Package (SOT23-5) - only available in Tape & Reel (LT) SOT23-5 (Top view) TS431 ...

Page 2

... V ref ref max. ref min. 2/9 Parameter TO92 package SOT23-5 package =200°C/W for TO92 package and R THj-a Parameter Test Condition TS431 TS431A TS431B < T < +70°C amb -40 < T < +85°C amb -40 < T < +105°C amb -40 < T < +125°C ...

Page 3

Reference voltage vs temperature 1.252 1.248 1.244 1.24 1.236 1.232 1.228 -40 - Temperature (°C) Cathode voltage vs cathode current 15 Vka = Vref 25° -10 -15 -1 -0.5 0 Vka ...

Page 4

TS431 Off-State current vs temperature 200 150 100 50 0 -40 - Temperature (°C) Ratio of change in reference input voltage to change in Vka voltage vs temperature Vka = 6V to Vref -3 ...

Page 5

Pulse response at Ik=100µA Input voltage 3 2 Output voltage Time (µs) Pulse response 1mA Input voltage 3 2 Output voltage Time ...

Page 6

TS431 PACKAGE MECHANICAL DATA 3 PINS - PLASTIC PACKAGE TO92 (TAPE & REEL) Dim. Min 2.5 P 11.7 PO 12.4 P2 5.95 F1/F2 2 17.5 W0 5.7 W1 8.5 W2 ...

Page 7

PACKAGE MECHANICAL DATA 3 PINS - PLASTIC PACKAGE TO92 (TAPE AMMO PACK) Dim. Min 2.5 P 11.7 PO 12.4 P2 5.95 F1/F2 2 17.5 W0 5 ...

Page 8

TS431 PACKAGE MECHANICAL DATA 3 PINS - PLASTIC PACKAGE TO92 (BULK) DIM. MIN. A 4.32 b 0.36 D 4.45 E 3.30 e 2.41 e1 1.14 L 12.7 R 2.16 S1 0.92 W 0.41 8/9 TO-92 MECHANICA DATA mm. TYP MAX. ...

Page 9

PACKAGE MECHANICAL DATA DIM. MIN. A 0.90 A1 0.00 A2 0.90 b 0.35 C 0.09 D 2.80 E 2. 0.35 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for ...

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