Voltage References - Advanced Analogic Technologies - #1

The AHK432 is a low voltage adjustable shunt refer­ence 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 out­standing flexibility in the development of power sup­plies and instrumentation. With a low operating cur­rent of 60uA, the AHK432 is well suited for battery-powered portable electronic applications. It also has a sharp turn-on characteristic and a dynamic resist­ance of only 50mQ, making it an excellent replace­ment 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%.

• Wide Output Voltage Range (1.24V to 20V)

• Operating Current From 60uAto 100mA

• Low Dynamic Output Resistance of 50mQ

• ±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

• 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

IN Rl

°—vV\A

ri

Adjustable regulator: 'RI + R2 '

AHK432

OUT = Vr_ef

R2

R2