Dual PWM controller checks overcurrent

The IRU3073 is a controller IC for dual-output high-performance DC/DC convertors.

The IRU3073 is a controller IC for dual-output high-performance DC/DC convertors.

This versatile device is designed for a wide range of compact, high performance synchronous buck regulator applications used in DDR memory circuits, computer graphics cards, desktop and server motherboards.

The integrated low dropout (LDO) controller enables a second output voltage using a single external mosfet rather than a second circuit, such as another LDO controller.

The IRU3073 operates with single supply 5 or 12V input voltage applications.

Both low- and high-side drivers can be biased separately, eliminating external components for charge pump circuitry for 5V applications when a 12V bias voltage is available.

The IRU3073 is a synchronous PWM controller with programmable switching frequency from 200 to 400kHz, capacitor-programmable soft-start, an uncommitted error amplifier for DDR voltage tracking applications and a 0.8V precision voltage reference for convertors with low output voltages.

In addition, the IRU3073 monitors the synchronous mosfet on-resistance for overcurrent protection, enhancing convertor efficiency and reducing cost by eliminating the current sense resistor.

Packaged in the 16-pin QSOP package, the IRU3073 is ideal for dual output voltage applications where size is a major factor.

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