MIC4722
3mm x 3mm 2.7MHz 3A PWM Buck Regulator General Description Features The Micrel MIC4722 is a high efficiency PWM buck (stepdown) regulator that provides up to 3A of output current.
The MIC4722 operates at 2.7MHz that makes it suitable
for next generation XDSL modems requiring operating
frequencies in excess of 2.4MHz and has proprietary
internal compensation that allows a closed loop bandwidth
of over 200KHz.
The low on-resistance internal p-channel MOSFET of the
MIC4722 allows efficiencies over 92%, reduces external
components count and eliminates the need for an
expensive current sense resistor.
The MIC4722 operates from 2.7V to 5.5V input and the
output can be adjusted down to 1V. The devices can
operate with a maximum duty cycle of 100% for use in lowdropout conditions.
The MIC4722 is available in the exposed pad 12-pin
3mm x 3mm MLFВ® package with a junction operating
range from –40°C to +125°C. 2.7 to 5.5V supply voltage
2.7MHz PWM mode
Output current to 3A
>92% efficiency
100% maximum duty cycle
Adjustable output voltage option down to 1V
Ultra-fast transient response …
