AP432A

Features:

- Precision reference voltage
AP432 : 1.24V ± 1%
AP432A : 1.24V ± 0.5%
- Sink current capability: 200mA.
- Minimum cathode current for regulation: 150A
- Equivalent full-range temp coefficient: 30 ppm/oC
- Fast turn-on Response.
- Low dynamic output impedance: 0.2
- Programmable output voltage to 20v
- Low output noise
- Packages: SOT89, SOT23, SOT25, SOP8 and TO92




Pinout






Specifications

Cathode Voltage......................................................................20V
Continuous cathode current..................................-10mA ~ 250mA
Reference input current range...............................................10mA
Operating temperature range (AP432)................... -20^oC ~ 85^oC
(AP432I)..................... -40^oC~85^oC
Lead Temperature................................................................260^oC
Storage Temperature .............................................-65^oC ~ 150^oC
Power Dissipation (Notes 1. 2) SOT89 ................................ 0. 80W
TO92...... ............................. 0.78W
SOT23 ................................. 0.25W
SOT25...................................0.25W
SOP....................................... 0.6W
Note 1: TJ, max =150^oC. .
Note 2: Ratings apply to ambient temperature at 25^oC.

Part Number	AP432A
Reference Voltage (V)	1.24
Accuracy (%)	0.5
Max Input Voltage (V)	36
Sink Current (mA)	250
Minimum Cathode Current for Regulation (uA) typ	150
Maximum Slope Resistance (Ohm's)	0.5
Operating Ambient Temp Range (°C)	-20 to +85

Description

The AP432/432A are 3-terminal adjustable precision shunt regulators with guaranteed stable temperature over the applicable extended commercial temperature range. The output voltage may be set at any level greater than 1.24\/ (V_REF) up to 20V merely by selecting two external resistors that act as a voltage divider network. These devices have a typical output impedance of 0.2. Active output circuitry provides very sharp turn-on characteristics, making these devices excellent improved replacements for Zener diodes in many applications.

The precise +/- 1% reference voltage tolerance of the AP432/432A make it possible in many applications to avoid the use of a variable resistor, consequently saving cost and eliminating drift and reliability problems associated with it.