FAN5033MPX

FAN5033MPX Datasheet

FAN5033 8-Bit Programmable 2- to 3-Phase Synchronous Buck Controller

Part	Datasheet
FAN5033MPX	FAN5033MPX (pdf)

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FAN5033 8-Bit Programmable 2- to 3-Phase Synchronous Buck Controller January 2007 FAN5033 8-Bit Programmable, 2- to 3-Phase, Synchronous Buck Controller Selectable 2- or 3-phase operation at up to 1MHz per phase ±7.7mV worst-case differential sensing error over temperature Active current balancing between the output phases Power Good and Crowbar blanking supports on-the-fly VID code changes 0.5V to 1.6V output Fully compliant with the VR10 and VR11 specifications Selectable VR10 extended 7-bit and VR11 8-bit VID tables Programmable soft-start ramp Programmable short-circuit protection and latch-off delay Desktop PC/Server processor power supplies for existing and next-generation Intel processors VRM modules The FAN5033 device is a multi-phase buck switching regulator controller optimized to convert a 12V input supply to the processor core voltage required by high performance processors. It has an internal 8-bit DAC that converts a digital voltage identification VID code, sent from the processor, to set the output voltage between 0.5V and 1.6V in 6.25mV steps. It outputs PWM signals to external MOSFET drivers that drive the switching power MOSFETs. The switching frequency of the design is programmable by a single resistor value. The number of phases can be programmed to support two- or three-phase applications. The FAN5033 also includes programmable no-load offset and droop functions to adjust the output voltage as a function of the load current, as required by the Intel specifications. The FAN5033 provides an accurate and reliable short-circuit protection function with an adjustable over-current set point. The FAN5033 is specified over the commercial temperature range of 0°C to +85°C and is available in a 32-lead MLP package. Ordering Information Part Number Temperature Range Pb-Free Package Type Packing Method Quantity FAN5033MPX 0°C to 85°C MLP-32 Tape and Reel 3,000 per Reel is a registered trademark of Intel Corporation. FAN5033 8-Bit Programmable 2- to 3-Phase Synchronous Buck Controller Block Diagram FAN5033 UVLO SHUTDOWN & BIAS Threshold DAC+OV P CSREF DAC - UV P PWRGD DEL AY RT RAM PADJ OSCILL ATOR CURREN T BALANCING CIRCUI T + CM P + CM P + CM P SET EN RESE T RESE T RESE T 2 / 3 - PHASE DRIVER LOGIC OD PWM1 PWM2 PWM3 CROWBAR CURREN T LIMI T SW1 SW2 SW3 NC ILIMI T DEL AY CURREN T LIMI T CIRCUI T CSCOM P CSREF CSSUM COM P FB RTN VIDSE L PRECISION REFERENCE Boot Control START-UP CONTRO L

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FAN5033 8-Bit Programmable 2- to 3-Phase Synchronous Buck Controller

January 2007

FAN5033
8-Bit Programmable, 2- to 3-Phase, Synchronous Buck Controller

Selectable 2- or 3-phase operation at up to 1MHz
per phase
±7.7mV worst-case differential sensing error over
temperature

Active current balancing between the output phases Power Good and Crowbar blanking supports
on-the-fly VID code changes
0.5V to 1.6V output Fully compliant with the VR10 and VR11
specifications

Selectable VR10 extended 7-bit and VR11 8-bit

VID tables

Programmable soft-start ramp Programmable short-circuit protection and
latch-off delay

Desktop PC/Server processor power supplies for
existing and next-generation Intel processors

VRM modules

The FAN5033 device is a multi-phase buck switching regulator controller optimized to convert a 12V input supply to the processor core voltage required by high performance processors. It has an internal 8-bit DAC that converts a digital voltage identification VID code, sent from the processor, to set the output voltage between 0.5V and 1.6V in 6.25mV steps. It outputs PWM signals to external MOSFET drivers that drive the switching power MOSFETs. The switching frequency of the design is programmable by a single resistor value. The number of phases can be programmed to support two- or three-phase applications.

The FAN5033 also includes programmable no-load offset and droop functions to adjust the output voltage as a function of the load current, as required by the Intel specifications. The FAN5033 provides an accurate and reliable short-circuit protection function with an adjustable over-current set point.

The FAN5033 is specified over the commercial temperature range of 0°C to +85°C and is available in a 32-lead MLP package.
Ordering Information

Part Number Temperature Range Pb-Free Package Type Packing Method Quantity

FAN5033MPX
0°C to 85°C

MLP-32

Tape and Reel 3,000 per Reel
is a registered trademark of Intel Corporation.

FAN5033 8-Bit Programmable 2- to 3-Phase Synchronous Buck Controller

Block Diagram

FAN5033

UVLO SHUTDOWN
& BIAS

Threshold

DAC+OV P

CSREF

DAC - UV P

PWRGD

DEL AY

RT RAM PADJ

OSCILL ATOR

CURREN T BALANCING

CIRCUI T
+ CM P
+ CM P
+ CM P

SET EN RESE T

RESE T

RESE T
2 / 3 - PHASE DRIVER LOGIC

OD PWM1 PWM2 PWM3

CROWBAR

CURREN T LIMI T

SW1 SW2 SW3

NC ILIMI T DEL AY

CURREN T LIMI T

CIRCUI T

CSCOM P CSREF CSSUM

COM P FB RTN VIDSE L

PRECISION REFERENCE

Boot Control

START-UP CONTRO L

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Datasheet ID: FAN5033MPX 513904