The UP1543S is a compact synchronous rectifier buck controller designed to operate from a 5V or 12V supply voltage. It features ease of use, low external component count, and fast transient response. The controller features include internal soft-start, over/under voltage protection, overcurrent protection, and shutdown functions. It is usually located on the miner hash board.

Product features:

Operates from 5V or 12V Supply Voltage;

Stand-alone mode operation;

Simple single-loop control design;

Voltage-mode PWM control;

Fast transient response;

Fixed 300kHz switching frequency;

Internal soft start.

Applications:

Power supplies for microprocessors or subsystem power supplies;

Cable modems, set-top boxes, and DSL modems;

Industrial Power Supplies;

5V or 12V input DC-DC regulators;

Low-voltage distributed power supplies.