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MIC2225 Datasheet(PDF) 3 Page - Micrel Semiconductor

Part No. MIC2225
Description  2MHz 600mA Synchronous Buck Regulator with 300mA LDO
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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MIC2225 Datasheet(HTML) 3 Page - Micrel Semiconductor

 
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Micrel, Inc.
MIC2225
February 2008
3
M9999-022008-D
Pin Description
Pin Number
Pin Name
Pin Function
1
AGND
Analog (signal) Ground.
2
LDO
LDO Output (Output): Connect to a 2.2µF output capacitor.
3
BIAS
Internal circuit bias supply. Must be de-coupled to signal ground with a 0.1µF
capacitor and should not be loaded.
4
AVIN
Analog Supply Voltage (Input): Supply voltage for the analog control circuitry
and LDO input power. Requires bypass capacitor to GND. It must be tied to
VIN.
5
FB
Feedback. Input to the error amplifier. For the Adjustable option, connect to the
external resistor divider network to set the output voltage. For fixed output
voltage options, connect to VOUT and an internal resistor network sets the output
voltage.
6
EN
Enable (Input). Logic low will shut down the switching regulator reducing the
quiescent current to less than 5µA.
7
ENLDO
Enable LDO (Input): Logic low will shut down the LDO, reducing the quiescent
current to less than 5µA.
8
VIN
Supply Voltage (Input): Supply voltage for the internal switches and drivers.
9
SW
Switch (Output): Internal power MOSFET output switches.
10
PGND
Power Ground.


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