GENERAL DESCRIPTION

The ADP3159 and ADP3179 are highly efficient output synchronous buck switching regulator controllers optimized for converting a 5 V main supply into the core supply voltage required by high-performance processors. These devices use an internal 4-bit DAC to read a voltage identification (VID) code directly from the processor, which is used to set the output voltage between 1.3 V and 2.05 V.

FEATURES

Optimally Compensated Active Voltage Positioning with Gain and Offset Adjustment (ADOPT?) for Superior Load Transient Response

Complies with VRM 8.4 Specifications with Lowest System Cost

4-Bit Digitally Programmable 1.3 V to 2.05 V Output

N-Channel Synchronous Buck Driver

Two On-Board Linear Regulator Controllers

Total Accuracy
0.8 Over Temperature

High Efficiency Current-Mode Operation

Short Circuit Protection

Power Good Output

Overvoltage Protection Crowbar Protects Micro

processors with No Additional External Components

APPLICATIONS

Core Supply Voltage Generation for:

Intel Pentium?III

Intel Celeron?