Description

The FAN5182 is a highly efficient, multiphase, synchronous buck switching regulator controller optimized for converting a 12V main supply into a high- current, 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 over-current 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).

Features

■ Selectable 1-, 2-, or 3-Phase Operation at up to 1MHz per Phase

■ Accuracy: 1

■ 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