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Overview
| Topology | Other Topology |
| Switching frequency | 200-1000 kHz |
| IC revision | 5 |
Description
The NCP81174 is a general−purpose up to four−phase synchronousbuck controller. It combines differential voltage sensing, differentialphase current sensing, and PWM VID interface to provide accurateregulated power for the computer or graphic controllers. It canreceive power saving command (PSI) from processors and operates insingle−phase diode emulation mode to obtain high efficiency in lightload. Dual−edge multiphase PWM modulation ensures a fast transientresponse with minimum possible capacitors.
Features
- Output Voltage up to 2.0 V with PWM VID Interface
- Support 1.8 V and 3.3 V VID interface
- Remote Differential Output Voltage Sense
- Differential Current Sense For Each Phase
- 200 kHz − 1000 kHz Switching Frequency
- Power Saving Interface (PSI)
- Power Good Output
- Thermally Compensated Current Monitoring
- Over Current Protection
- Fast Transient Response
- 5 V VCC Shunt Regulator
- Latched OVP and UVP Protections
- QFN−32, 5 x 5 mm, 0.5 mm Pitch Package
- This is a Pb−Free Device
Typical applications
- Graphics Card Applications
- GPU and CPU Power
- Desktop and Notebook Applications
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT(A) | RDC(mΩ) | fres(MHz) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | Material | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCI SMT Flat Wire High Current Inductor, 0.47 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | Inductance0.47 µH | – | – | DC Resistance1.35 mΩ | Self Resonant Frequency235 MHz | Performance Rated Current31.9 A | Saturation Current @ 10%9 A | Saturation Current @ 30%20 A | MaterialSuperflux | ||||
 | WE-LQS SMT Power Inductor, 1 µH, 5.9 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | Inductance1 µH | Rated Current5.9 A | Saturation Current11.5 A | DC Resistance11 mΩ | Self Resonant Frequency159 MHz | – | – | – | – |