GENERAL DESCRIPTION

The ADM1052 is a dual, precision, voltage regulator controller intended for power rail generation and active bus termination on personal computer motherboards. It contains a precision 1.2 V bandgap reference and two channels consisting of control amplifiers driving external power devices. Each channel has a shutdown input to turn off amplifier output and “Hiccup Mode” protection circuitry for the external power device.

FEATURES

Two Independent Controllers on One Chip

Two 2.525 V Outputs

Shutdown Inputs to Control Each Channel

±2.5 Accuracy Over Line, Load, and Temperature

Low Quiescent Current

Low Shutdown Current

Works with External N-Channel MOSFETs for Low Cost

“Hiccup Mode” Fault Protection

No External Voltage or Current Setting Resistors

Small, 8-Lead SO Package

APPLICATIONS

Desktop Computers

Servers

Workstations