AHK432 Datasheet, PDF (1/10 Pages) Advanced Analogic Technologies – Adjustable Low Voltage Shunt Regulator

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
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
• 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
AHK432
OUT
R1
Adjustable regulator:
R1 + R2
R2
OUT = V_REF
R2
432.2005.11.1.3
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