IRU431L Datasheet, PDF (1/6 Pages) International Rectifier – LOW -VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR

Data Sheet No. PD94118
IRU431L / IRU431AL
LOW -VOLTAGE ADJUSTABLE PRECISION
SHUNT REGULATOR
FEATURES
SOT-23 Packages
Voltage Reference Initial Accuracy
(1% for IRU431L and 0.5% for IRU431AL)
Low Operating Cathode Current
(80mA max)
Unconditionally Stable with only 1mF
Adjustable Output from 1.24V to 15V
0.25V Typical Output Impedance
Pin to Pin Compatible with TLV431
APPLICATIONS
Precision Voltage Reference
Linear Regulator Controller
Secondary Side Controller for the low voltage
power supply applications
DESCRIPTION
The IRU431L family are three-terminal adjustable shunt
regulators that can also be used as precision voltage
references. Its output voltage may be set to any value
between VREF(1.24V) and 15V with two external resis-
tors as shown in the typical application circuit. Other
applications of this device include being used as a
merged amplifier and reference in applications such as
a linear regulator or as the secondary side controller in
low voltage power supply applications. The IRU431L only
requires 80mA maximum quiescent current before regu-
lating, making it ideal as a voltage reference for battery
type applications. The IRU431L has 61% initial accu-
racy while IRU431AL provides 60.5% initial accuracy.
TYPICAL APPLICATION
RB
VIN
IRU431L
Vo = VREF 3o1 +
R1
R2
p
VOUT
R1
Co
R2
Figure 1 - Typical application of the IRU431L as a shunt regulator / voltage reference.
PACKAGE ORDER INFORMATION
TA (°C)
0 To 70
0 To 70
5-PIN SOT-23 (L5)
IRU431LCL5
IRU431ALCL5
3-PIN SOT-23 (L3)
IRU431LCL3
IRU431ALCL3
Rev. 1.8
02/20/02
www.irf.com
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