FAN5092 Datasheet

IC型號(hào)：
FAN5092
PDF描述：
High Current System Voltage Buck Converter
文件大小：
110.50KB
PDF頁(yè)數(shù)：
20頁(yè)
芯片廠(chǎng)家：
FAIRCHILD

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www.fairchildsemi.com

FAN5092

High Current System Voltage Buck Converter

Features

鈥?Output from 1.1V to 5V

鈥?Integrated high-current gate drivers

鈥?Two interleaved synchronous phases per IC for maximum

performance

鈥?Up to 4 phase power system

鈥?Built-in current sharing between phases and between ICs

鈥?Frequency and phase synchronization between ICs

鈥?Remote sense and Programmable Active Droop鈩?/div>

鈥?High precision voltage reference

鈥?High speed transient response

鈥?Programmable frequency from 200KHz to 2MHz

鈥?Adaptive delay gate switching

鈥?Integrated Power Good, OV, UV, Enable/Soft Start

functions

鈥?Drives N-channel MOSFETs

鈥?Operation optimized for 12V

鈥?High ef鏗乧iency mode at light load

鈥?Overcurrent protection using MOSFET sensing

鈥?28 pin TSSOP package

Description

The FAN5092 is a synchronous multi-slice DC-DC

controller IC which provides a highly accurate,

programmable output voltage for all high-current

applications. Two interleaved synchronous buck regulator

phases with built-in current sharing operate 180

擄

out of

phase to provide the fast transient response needed to satisfy

high current applications while minimizing external

components. FAN5092s can be paralleled while maintaining

both frequency and phase synchronization and ensuring

current sharing in a high-power system. The FAN5092

features remote voltage sensing, Programmable Active

Droop

餂?/div>

and advanced response for optimal converter

transient response with minimum output capacitance. It has

integrated high-current gate drivers with adaptive delay gate

switching, eliminating the need for external drive devices.

These make it possible to create power supplies running at a

switching frequency as high as 4MHz, for ultra-high density.

The output voltage can be set from 1.1V to 5V with an

accuracy of 0.5%. The FAN5092 uses a high level of

integration to deliver load currents in excess of 150A from a

12V source with minimal external circuitry. The FAN5092

also offers integrated functions including Power Good,

Output Enable/Soft Start, under-voltage lockout, over-

voltage protection, and current limiting with independent

current sense on each slice. It is available in a 28-pin TSSOP

package.

Applications

鈥?Power supply for Logic

鈥?Modular Power supply

Block Diagram

+12V

VFB

FAN5092

PHASE

+12V

VFB

CLK

PHASE

ISHR

+12V

3.3V @ 120A

FAN5092

+12V

VFB

Programmable Active Droop is a trademark of Fairchild Semiconductor.

REV. 1.0.7 6/20/02

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