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Compact Technology |
TL432 Series
TL432 Series
Adjustable Precision Shunt Regulator
TL432 Series Pin Assignment
Description
The TL432 series are three-terminal adjustable regulators with
guaranteed thermal stability over applicable temperature ranges. The
output voltage may be set to any value between VREF (1.24 or 1.25
volts) and 18 volts with two external resistors. These 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.
3
12
3-Lead Plastic SOT-23
Package Code: N
Pin 1: Reference
Pin 2: Cathode
Pin 3: Anode
Features
x Programmable Precise Output Voltage from 1.24 or 1.25V to 16V
x High Stability under Capacitive Load
x Fast turn on response
x Low Dynamic Output Resistance: 0.2ȍ Typical
x SOT-23 Packages
x Low Output Noise
x Wide Operating Range of -40 to 125 oC
x Low Equivalent Full-range Temperature Coefficient with 50PPM/ oC Typical
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified)
Characteristics
Cathode Voltage
Cathode Current Range (Continuous)
Reference Input Current Range
Power Dissipation
Operating Temperature Range (Max.)
Storage Temperature Range
Symbol
VKA
IK
IREF
PD
Topr
Tstg
Value
18
20
10
SOT-23
370
-- --
-- --
-- --
-40~+125
-65~+150
Unit
V
mA
mA
mW
oC
oC
Operating Conditions
Characteristics
Cathode Voltage
Cathode Current Range (Continuous)
Operating Ambient Temperature Range
Symbol
VKA
IK
TOPB
Min.
VREF
0.1
-40
Max.
16
20
125
Unit
V
mA
oC
CTC-IC-0003-VER1.0
1/6
TL432
Functional Block Diagram & Symbol
Functional Block Diagram
Symbol
TL432 Series
Cathode
Test Circuits
Fig 1. VK=VREF
II
IN
IREF
VREF
Reference
Anode
VK
IK
Fig 2. VK>VREF
II
IN
R1 IREF
R2 VREF
VK
IK
Fig 3. Off-State Current
IN VK
IOFF
Note: VK=VREF (1+R1/R2)+IREFxR1
Electrical Characteristics (TA=25oC unless otherwise specified)
Characteristics
1.24V±2.0%
1.24V±1.0%
ReferenceInputVoltage(Fig1)
1.24V±0.5%
1.25V±2.0%
1.25V±1.0%
1.25V±0.5%
RatioofChangeinReferenceInputVoltagetothe
ChangeinCathodeVoltage(Fig2)
ReferenceInputCurrent(Fig2)
MinimumCathodeCurrentforRegulation(Fig1)
OffͲStateCathodeCurrent(Fig3)
DynamicOutputImpedance(Fig1)
Symbol
TestConditions
VREF VK=VREF,IK=10mA
'VREF/'VK IK=10mA,,'VK=18VtoVREF
IREF
IK(min)
IK(off)
ZK
IK=10mA,R1=10Kɏ,R2=ь
VK=VREF
VK=6V,VREF=0
VK=16V,VREF=0
VK=VREF,fd1kHz,IK=100uAto
20mA
Min
1.215
1.228
1.234
1.225
1.238
1.244
Ͳ
Ͳ
Ͳ
Ͳ
Ͳ
Typ
1.24
1.24
1.24
1.25
1.25
1.25
1.0
0.15
20
0.01
0.04
0.2
Max
1.265
1.252
1.246
1.275
1.262
1.256
Unit
V
2.7 mV/V
0.5
80
0.05
0.15
uA
uA
uA
0.4 ɏ
CTC-IC-0003-VER1.0
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TL432
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