Characteristic Active Voltage Positioning with Gain and Offset Adjustment Optimal Compensated Transient Response for Advanced Loads
VRM 8.2, VRM 8.3 and VRM 8.4 standard
5-Bit Digital Programmable 1.3 V to 3.5 V Output Dual N-Channel Synchronous Drivers Onboard Linear Regulator Controller Overall Output Accuracy Over 61% Over Temperature High Efficiency, Current Mode Operation Short Circuit Protection Over Voltage Protection No Additional External Microprocessing device power good output in TSSOP-20 package

The application desktop PC power supply is:
Pentium II and Pentium III Processor Family
AMD's K6 processor
VRM module

Overview The ADP3154 is a high-efficiency synchronous buck switching regulator controller that converts a 5 V main power supply optimized for the core supply voltage of the Pentium III and other high-performance processors that require it. The ADP3154 uses an internal 5-bit DAC to read the Voltage Identification (VID) code directly from the processor, which is used to set the output voltage to current between 1.3 V and 3.5 V. The ADP3154 uses a constant off-time architecture to drive two The switching frequency of an external N-channel MOSFET can be programmed to optimize size and efficiency. It also uses a unique complementary regulation technique called Active Voltage Positioning to improve load transient performance. Active in DC/DC converters to meet voltage positioning results in tight output voltage specifications for Pentium II and Pentium III processors, the lowest number of output capacitors and the smallest. Different from the voltage mode and standard current mode architectures, the active voltage positioning adjusts as the load current so that the output voltage function is always the best position for the system transients. The ADP3154 provides accurate and reliable short-circuit protection and adjustable current limit. It also includes an integrated overvoltage protection circuit feature to protect the microprocessor from damage to the core in case the supply exceeds the rated voltage setting by more than 15%.