Buck Regulator Measures 3 mm × 3 mm

Micrel has launched the MIC2207, a 2-MHz 3-A PWM buck regulator in a 3-mm × 3-mm MLF. Aimed at applications requiring up to 3 A at 3 V or 5 V, the regulator features ultrafast operation and a proprietary internal compensation that allows for extreme transient response and the use of tiny LC components.

A low-resistance integrated p-channel MOSFET allows the chip to deliver up to 3 A with more than 94% efficiency. The output voltage can be adjusted down to 1 V and can operate with a maximum duty cycle of 100% for use in low dropout conditions. The P-MOSFET also eliminates the need for a sense resistor to provide a current limit, thus further reducing the need for external components.

The IC is available in volume and pricing starts at $1.90 for 1000-piece quantities.