Datasheet Microchip MIC4742
The MIC4742 is a high efficiency dual PWM buck (step-down) regulator that provides dual 2A current output
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MIC4742 Data Sheet
2 MHz Dual 2A Integrated Switch
Buck Regulator General Description Features The Micrel MIC4742 is a high efficiency dual PWM buck
(step-down) regulator that provides dual 2A current output.
The MIC4742 operates at 2MHz. A proprietary internal
compensation technique allows a closed loop bandwidth of
over 200kHz. The low on-resistance internal P-Channel MOSFET of the
MIC4742 allows efficiencies over 92%, reduces external
components count and eliminates the need for an
expensive current sense resistor.
The MIC4742 operates from 2.9V to 5.5V input and the
output can be adjusted down to 0.6V. The device can
operate with a maximum duty cycle of 100% for use in lowdropout conditions.
The MIC4742 is available in the exposed pad 16-pin
3mm x 3mm MLFÂ® and EPAD TSSOP-16 packages with a
junction operating range from â€“40Â°C to +125Â°C.
All support documentation can be found on Micrelâ€™s web
site at: www.micrel.com. 2.9 to 5.5V supply voltage
2MHz PWM mode
2A Dual output
Greater than 92% efficiency
100% maximum duty cycle
Adjustable output voltage option down to 0.6V ...
|Lifecycle Status||Production (Appropriate for new designs but newer alternatives may exist)||Production (Appropriate for new designs but newer alternatives may exist)||Production (Appropriate for new designs but newer alternatives may exist)|
|# of Outputs||2||2||2|
|Duty Cycle Max, %||1||1||1|
|Input Voltage Range, V||2.9 - 5.5||2.9 - 5.5||2.9 - 5.5|
|Light Load Efficiency Mode||No||No||No|
|Operating Temperature Range, °C||-40 to +125||-40 to +125||-40 to +125|
|Output Current, mA) Max||3000||3000||3000|
|Output Voltage Range, V||0.6 - 5.5||0.6 - 5.5||0.6 - 5.5|
|Regulator Type||Step Down (Buck)||Step Down (Buck)||Step Down (Buck)|
|SHUTDOWN Current, µA||1.6||1.6||1.6|
|Switching Frequency, kHz||2000||2000||2000|
- Power Management > Switching Regulators > Step Down up to 6V