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IRU3021M Datasheet 5-bit Programmable Synchronous Buck Plus Triple Ldo Controller

Manufacturer: International Rectifier (now Infineon)

Overview: Data Sheet No. PD94145 IRU3021M 5-BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPLE LDO.

General Description

The IRU3021M controller IC is specifically designed to meet Intel specification for next generation microprocessor applications requiring multiple on-board regulators.

The IRU3021M provides a single chip controller IC for the Vcore, three LDO controllers, one with an automatic select pin that connects to the Type Detect pin of the AGP slot for the AGP VDDQ supply, one for GTL+ and the other for the 1.8V chip set regulator as required for the next generation PC applications.

The IRU3021M uses N-channel MOSFET as pass transistor for Vout2(VDDQ), Vout3(1.5V) and Vout4(1.8V).

Key Features

  • lossless current sensing for both switcher by using the RDS(on) of the high-side power MOSFET as the sensing resistor, an output under-voltage shutdown that detects short circuit condition for the linear outputs and latches the system off, and a Power Good window comparator that switches its open collector output low when any one of the outputs is outside of a pre-programmed window.

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IRU3021M Distributor