NCP5381 Datasheet (ON Semiconductor) - 2/3/4 Phase Buck Controller

NCP5381, 2/3/4 Phase Buck Controller

Pin No.

Symbol 1 EN 2 *9 10 VID0 *VID7 VR10/VR11 11 SS 12 ROSC 13 ILIM 14 AGND 15 VS+ 16 VS-17 DIFFOUT 18 COMP 19 VFB 20 VDRP 21, 23, 25, 27 22, 24, 26, 28 29 30 * 33 34 35 36 37 CSxN CSx DRVON G1 * G4 VREF DGND VCC VR_RDY 38 NTC 39 VR_FAN 40 VR_HOT 41 THPA

NCP5381 2/3/4 Phase Buck Controller for VR10 and VR11 Pentium IV Processor Applications The NCP5381 is a two- , three- , or four- phase buck controller which combines differential voltage and current sensing, and adaptive voltage positioning to power Intel’s most demanding Pentium IV Processors and low voltage, high current power supplies.

Dual- edge pulse- width modulation (PWM) combined with inductor current sensing reduces system cost by providing the fastest initial response to transient l

NCP5381 Features

* Meets Intel’s VR 10.0, 10.1, 10.2, and 11.0 Specifications

* Dual- Edge PWM for Fastest Initial Response to Transient Loading

* High Performance Operational Error Amplifier

* Supports both VR11 and Legacy VR10 Soft- Start Modes

* Dynamic Reference Injection

* 8- Bit DAC per