The NCP81119 Multi−Phase buck solution is optimized for

Intel® VR12.5 compatible CPUs with user configurations of 4/3/2/1

phases. The controller combines true differential voltage sensing,

differential inductor DCR current sensing, input voltage

feed−forward, and adaptive voltage positioning to provide accurately

regulated power for both Desktop and Notebook applications. The

control system is based on Dual−Edge pulse−width modulation

(PWM) combined with DCR current sensing providing the fastest

initial response to dynamic load events at reduced system cost. It has

the capability to shed to single phase during light load operation and

can auto frequency scale in light load conditions while maintaining

excellent transient performance.

High performance operational error amplifiers are provided to

simplify compensation of the system. Patented Dynamic Reference

Injection further simplifies loop compensation by eliminating the need

to compromise between closed−loop transient response and Dynamic

VID performance. Patented Total Current Summing provides highly

accurate digital current monitoring.

Features

• Meets Intel VR12.5 Specifications

• Current Mode Dual Edge Modulation for Fastest Initial Response to

Transient Loading

• High Performance Operational Error Amplifier

• Digital Soft Start Ramp

• Dynamic Reference Injection

• Accurate Total Summing Current Amplifier

• Dual High Impedance Differential Voltage and Total

Current Sense Amplifiers

• Phase−to−Phase Dynamic Current Balancing

• “Lossless” DCR Current Sensing for Current Balancing

• True Differential Current Balancing Sense Amplifiers

for Each Phase

• Adaptive Voltage Positioning (AVP)

• Switching Frequency Range of 280 kHz – 600 kHz

• Startup into Pre−Charged Loads While Avoiding False OVP

• Power Saving Phase Shedding

• Vin Feed Forward Ramp Slope

• Pin Programming for Internal SVID parameters

• Over Voltage Protection (OVP) & Under Voltage

Protection (UVP)

• Over Current Protection (OCP)

• VR−RDY Output with Internal Delays

• These are Pb−Free Devices

Applications

• Desktop and Notebook Processors

NCP81119属于集成电路（IC） > PMIC - 稳压器 - DC DC 开关式控制器。安森美半导体公司制造生产的NCP81119DC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。