FAN5182

FAN5182 -- Adjustable Output 1-, 2-, or 3-Phase Synchronous Buck Controller

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FAN5182 -- Adjustable Output 1-, 2-, or 3-Phase Synchronous Buck Controller

March 2007

FAN5182 -- Adjustable Output, 1-, 2-, or 3-Phase Synchronous Buck Controller
Features
Selectable 1-, 2-, or 3-Phase Operation at up to 1MHz per Phase Accuracy:

Description
The FAN5182 is a highly efficient, multiphase, synchronous buck switching regulator controller optimized for converting a 12V main supply into a highcurrent, low-voltage supply for use in point-of-load (POL) applications. It uses a multi-loop PWM architecture to drive the logic-level outputs at a programmable switching frequency that can be optimized for regulator size and efficiency. The phase relationship of the output signals can be programmed to provide 1-, 2-, or 3-phase operation, allowing for construction of up to three complementary, interleaved buck switching stages. The FAN5182 provides accurate and reliable overcurrent protection and adjustable current limiting. The FAN5182 is specified over the commercial temperature range of 0 C to 85 C and is available in a 20-lead Quarter-Size Outline Package (QSOP).

FAN5182 FAN5182 NA3E229 FAN5182 NA3E231

2% 1% 3%

Externally Adjustable 0.8V to 5V Output from a 12V Supply Logic-Level PWM Outputs for Interface to External High-Power Drivers Active Current Balancing Between all Phases Built-in Power-Good / Crowbar Functions Programmable Over-Current Protection with Adjustable Latch-Off Delay

Applications
Auxiliary Supplies DDR Memory Supplies Point-of-Load Supplies

Ordering Information
Part Number
FAN5182QSCX NL FAN5182QSCX NA3E229 NL FAN5182QSCX NA3E231 NL

Temperature Range
0 C to 85 C 0 C to 85 C 0 C to 85 C

PbFree
Yes Yes Yes

Package
QSOP-20L QSOP-20L QSOP-20L

Packing Method
Tape and Reel Tape and Reel Tape and Reel

Quantity per Reel
2500 2500 2500

2005 Fairchild Semiconductor Corporation FAN5182 Rev. 1.1.1

www.fairchildsemi.com