AT2005B PDF Datasheet – Controller for System Power Supply

Part Number: AT2005B

Function: Controller chip for the system power supply

Package: DIP 16 Pin Type

Manufacturer: Advanced Technology Eletroncis ( ATE )


AT2005B pinout datasheet


The AT2005B microcircuit was developed by ATE for use in push-pull pulse converters of ATX class system power supplies as a PWM control microcircuit.

It simultaneously performs the functions of a voltage supervisor, a voltage regulator, as well as a PG (PW-OK) signal conditioning function and a remote control function.
Adjustment and stabilization of output voltages is carried out by the method of pulse-width modulation (PWM).


1. Formation of control signals for powerful transistors of a push-pull converter

2. Change in the width of these control pulses when the magnitude of the output voltages changes

3. Control of positive voltage generated by the power supply (+3.3V, +5V +12V)

4. Protection against excess of positive output voltages

5. Protection against reduction of positive output voltages

6. Protection against voltage drop in negative voltage channels (-5V and -12V)

7. Power Good (PG) signal generation

8. Start-up and shutdown control of the power supply in accordance with the PSJ3N signal.


AT2005B pdf

AT2005B Datasheet PDF