General Description

The MIC2150/1 are simple 2-phase dual-output synchronous buck control ICs featuring small size and high efficiency. The ICs implement PWM control at 500kHz (MIC2150) or 300kHz (MIC2151), with the outputs switching 180° out of phase. The result of the out-of-phase operation is 1MHz input ripple frequency with ripple current cancellation, minimizing the required input filter capacitance. A 1 output voltage tolerance allows the maximum level of system performance. Internal drivers with adaptive gate drive allow the highest efficiency with the minimum external components.

Features

? Dual Synchronous Buck Control IC with outputs switching 180 degree out-of-phase

? 4.5V to 14.5V input voltage range

? Adjustable output voltages down to 0.7V

? 1 output voltage accuracy

? MIC2150: 500kHz PWM operation

? MIC2151: 300kHz PWM operation

? Adaptive gate drive allows efficiencies over 95

? Adjustable current limit with no sense resistor

- Senses low-side MOSFET current

? Internal drivers allow 20A per phase

? Power Good output allow simple sequencing

? Dual threshold enable pin

? Independent programmable soft-start pins

? Output over-voltage protection

? Input UVLO

? Works with ceramic output capacitors

? Tiny 4mm×4mm 24-Pin MLF? package

? Junction temperature range of -40°C to +125°C

Applications

? Multi-output power supplies with sequencing

? DSP, FPGA, CPU and ASIC power supplies

? Telecom and Networking equipment

? Servers