Datasheet Microchip MIC2151 — Ficha de datos

MIC2150/MIC2151
2-Phase Dual Output PWM Synchronous
Buck Control IC General Description Features 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 180В° 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 are available in the small size 4mmГ—4mm
24-pin MLFВ® package. The MIC2150/1 has a junction
operating range from –40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com. 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 4mmГ—4mm 24-Pin MLFВ® package Junction temperature range of -40В°C to +125В°C Applications Multi-output power supplies with sequencing …