MIC2225 Datasheet, PDF (2/14 Pages) Micrel Semiconductor – 2MHz 600mA Synchronous Buck Regulator with 300mA LDO

Micrel, Inc.
Ordering Information
Part Number
Voltage
Temperature Range
MIC2225-4MYMT
1.2V/2.8V
–40° to +125°C
MIC2225-4SYMT
1.2V/3.3V
–40° to +125°C
MIC2225-G4YMT
1.8V/1.2V
–40° to +125°C
MIC2225-GFYMT
1.8V/1.5V
–40° to +125°C
Note:
1. For other voltages available. Contact Micrel Marketing for details.
Package
10-Pin 2x2 Thin MLF^®
10-Pin 2x2 Thin MLF^®
10-Pin 2x2 Thin MLF^®
10-Pin 2x2 Thin MLF^®
MIC2225
Lead Finish
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pin Configuration
AGND 1
LDO 2
BIAS 3
AVIN 4
FB 5
10 PGND
9 SW
8 VIN
7 ENLDO
6 EN
10-Pin 2mm x 2mm Thin MLF^® (MT)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9
10
Pin Name
AGND
LDO
BIAS
AVIN
FB
EN
ENLDO
VIN
SW
PGND
Pin Function
Analog (signal) Ground.
LDO Output (Output): Connect to a 2.2µF output capacitor.
Internal circuit bias supply. Must be de-coupled to signal ground with a 0.1µF
capacitor and should not be loaded.
Analog Supply Voltage (Input): Supply voltage for the analog control circuitry
and LDO input power. Requires bypass capacitor to GND.
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 V_OUT and an internal resistor network sets the output
voltage.
Enable (Input). Logic low will shut down the switching regulator reducing the
quiescent current to less than 5µA.
Enable LDO (Input): Logic low will shut down the LDO, reducing the quiescent
current to less than 5µA.
Supply Voltage (Input): Supply voltage for the internal switches and drivers.
Switch (Output): Internal power MOSFET output switches.
Power Ground.
October 2007
2
M9999-101107-B