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