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MIC2150 Datasheet, PDF (1/27 Pages) Micrel Semiconductor – 2-Phase Dual Output PWM Synchronous Buck Control IC | |||
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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 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.
⢠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
The MIC2150/1 are available in the small size 4mmÃ4mm
24-pin MLF® package. The MIC2150/1 has a junction
operating range from â40°C to +125°C.
Data sheets and support documentation can be found on
Micrelâs web site at www.micrel.com.
Applications
⢠Dual threshold enable pin
⢠Independent programmable soft-start pins
⢠Output over-voltage protection
⢠Input UVLO
⢠Works with ceramic output capacitors
⢠Tiny 4mmÃ4mm 24-Pin MLF® package
⢠Multi-output power supplies with sequencing
⢠Junction temperature range of -40°C to +125°C
⢠DSP, FPGA, CPU and ASIC power supplies
⢠Telecom and Networking equipment
⢠Servers
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Typical Application
MicroLead Frame and MLF are registered trademarks of Amkor Technology, Inc.
Micrel Inc. ⢠2180 Fortune Drive ⢠San Jose, CA 95131 ⢠USA ⢠tel +1 (408) 944-0800 ⢠fax + 1 (408) 474-1000 ⢠http://www.micrel.com
August 2009
M9999-082809-A
(408) 944-0800
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