AHK432
Adjustable Low Voltage Shunt Regulator
General Description
The AHK432 is a low voltage adjustable shunt refer-
ence with thermal stability guaranteed over the full
industrial temperature range. This three-terminal
regulator has an output voltage range that extends
from V
REF
(1.24V) to 20V, giving designers out-
standing flexibility in the development of power sup-
plies and instrumentation. With a low operating cur-
rent of 60µA, the AHK432 is well suited for battery-
powered portable electronic applications. It also has
a sharp turn-on characteristic and a dynamic resist-
ance of only 50mΩ, making it an excellent replace-
ment for zener diodes in low tempco designs.
The AHK432 is available in the Pb-free, surface-
mount 3- or 5-pin SOT23, as well as the through
hole TO-92. Three voltage tolerance options are
offered in each package: ±0.5%, ±1%, and ±2%.
Features
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PowerManager
™
Wide Output Voltage Range (1.24V to 20V)
Operating Current From 60µA to 100mA
Low Dynamic Output Resistance of 50mΩ
±0.5% Trimmed Voltage Reference
10mV (Typical) V
REF
Deviation, From -40°C to
+105°C
Surface Mount 3- or 5-Pin SOT23 or Through-
Hole 3-Pin TO-92 Package
Applications
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Adjustable and Programmable Supplies
Global Voltage Reference for Multiple Power
Supplies
Instrumentation
Isolated Feedback in Switching Power
Supplies
Linear Regulators (External Reference)
Medical Electronics (see Endnote, page 10)
Notebook Computers
Typical Application
IN
R
L
OUT
R1
Adjustable regulator:
AHK432
R2
OUT = V
REF
R1 + R2
R2
432.2005.11.1.3
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