Description

The FAN5182 is a highly efficient multi-phase 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 also provides accurate and reliable over-current protection and adjustable current limiting.
FAN5182 is specified over the commercial temperature range of 0°C to +85°C and is available in a 20-lead QSOP package.

Features

■ Selectable 1-, 2-, or 3-phase operation at up to 1MHz per phase
■ ±2% Worst-case differential sensing error over temperature
■ 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