NCP81251: Single−Phase Synchronous Buck Regulator with Integrated Power MOSFETs for VR12 Embedded CPUs

The NCP81251 is a single−phase synchronous buck regulator with integrated power MOSFETs to provide a high−efficiency and compact−footprint power management solution for VR12 embedded CPUs. The device is able to deliver up to 14 A TDC output current on an adjustable output with SVID interface. Operating in high switching frequency up to 1.2 MHz allows employing small size inductors and capacitors while maintaining high efficiency due to integrated solution with high performance power MOSFETs. Current−mode RPM control with feedforward from both input power supply and output voltage ensures stable operation over a wide operation condition.

Features

5V to 20V Input Voltage Range
Adjustable Output Voltage with SVID Interface
Integrated Gate Driver and Power MOSFETs
500kHz ~ 1.2MHz Switching Frequency
Feedforward Operation for Input Supply Voltage and Output Voltage
Overcurrent, Over/Undervoltage, and Thermal protection
5 V to 20 V Input Voltage Range
1.0 V/1.1 V Fixed Boot Voltage
Adjustable Output Voltage with SVID Interface
Up to 14 A TDC Output Current
500 kHz ~ 1.2 MHz Switching Frequency
Current−Mode RPM Control
Programmable SVID Address and ICCMax
Programmable DVID Feed−Forward to Support Fast DVID
Feedforward Operation for Input Supply Voltage and Output Voltage
Output Over−Voltage and Under−Voltage Protections
External Current Limitation Programming with Inductor Current Sense

Benefits

Optimized for Ultrabook and notebook applications
Programmable DVID Feed-Forward to Support Fast DVID
Small form-factor design
Reduced output filter size and cost
Fast line transient response and DVID transition
Protected against faults

Applications

Integrated POL

End Products

Ultrabook
Notebook
Server
Microservers , Storage devices , Embedded CPU's

Data Sheets (1)

Document Title	Document ID/Size	Revision	Revision Date
Single-Phase Voltage Regulator w SVID Interface for Computing Apps	NCP81251/D (295kB)	1	Sep, 2015

Package Drawings (1)

Document Title	Document ID/Size	Revision
QFN48 6x6, 0.4P	485CJ (62.3kB)	A

Order Information

Product	Status	Compliance	Package		MSL*	Container		Budgetary Price/Unit
NCP81251MNTXG	Active	Pb-free Halide free	QFN-48	485CJ	3	Tape and Reel	2500	$0.95

Specifications

Product	Topology	Phases	Control Mode	VCC Min (V)	VCC Max (V)	fSW Typ (kHz)	tres Typ (ns)
NCP81251MNTXG	Step-Down	1	Voltage Mode	4.75	5.75	500 - 1200

Single-Phase Voltage Regulator w SVID Interface for Computing Apps (295kB) NCP81251

QFN48 6x6, 0.4P NCP81252