TL432A
Low Voltage Adjustable Precision Shunt Regulator
Features:
• Precise Reference Voltage to 1.24V
• Guaranteed 1% Reference Voltage
Tolerance
• Sink Current Capability, 80µA to100mA
• Quick Turn-on
• Adjustable Output Voltage, V
o
=V
REF
to 18V
• 0.2 Ω Typical Output Impedance






Absolute Maximum Ratings
Symbol Parameter Rating Unit
V
KA
Cathode voltage 18 V
I
K
Continuous cathode current range 100 mA
I
REF
Reference current range 3 mA
Tj Operating Junction Temperature Range - 40 to 150 °C
Electrical Characteristics T
A
= 25°C ( unless otherwise noted)
TL432A
Symbol Parameter Test Conditions
Min Typ Max
Unit
V
RFF
Reference voltage
V
KA
=V
REF
, l
K
=10mA (Fig. 1)
T
A
=25°C
1.228 1.240 1.252 V
V
DEV
V
REF
Temp Deviation
T
A
=full range(see Note1)
V
KA
=V
REF
, l
K
=10mA(Fig. 1)
10 25 mV
∆V
REF
/∆V
KA
Ratio of Change in V
REF
to
Change in Cathode Voltage
!
K
=10mA, V
KA
=18V to V
REF
(Fig. 2)
-1 -2.7 mV / V
I
REF
Reference Input Current
I
K
=10mA, R
1
=10kΩ R
2
=∞
(Fig.2)
0.25 0.5 µA
I
REF(DEV)
I
REF
Temp Deviation
T
K
=full range (see Note 1),
R
1
=10kΩ, R
2
=∞, I
K
=10mA
(Fig. 2)
0.05 0.3 µA
Ik(off) Off-state cathode current
V
REF
=0 V,(Fig.3)
V
k
=18V
0.04 0.5 µA
Zka
Dynamic Output
Impedance
V
ka
=V
ref
, I
k
=1mA to 100mA
F ≤1kHz (Fig. 1)
0.2 0.4 Ω
IK(MIN) Minimum Operating Current V
KA
=V
REF
(Fig. 1) 60 80 µA
Notes: 1. Full temperature range is -40°C to 105°C for TL432