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. A dual threshold enable pin, matched soft-start pins, and a power good output are provided, allowing a high level of control. The MIC2150/1 has a junction operating range from -40°C to +125°C.
Feature
- Dual Synchronous Buck Control IC with outputs switching 180° 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
