MIC23201 Datasheet, PDF (2/20 Pages) Micrel Semiconductor – 2MHz PWM 2A Buck Regulator

Micrel Inc.
MIC23201
Ordering Information
Part Number
Marking
Code
Nominal Output
Voltage
Package
MIC23201YML
201A
ADJ
10-pin 3mm x 3mm MLF
Notes:
1. Other options available. Contact Micrel for details.
2. MLF is GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
Pin Configuration
Junction
Temp. Range
-40C to +125C
Lead
Finish
Pb-Free
10 Pin 3mm x 3mm MLF (ML)
(Top View)
Pin Description
Pin Number
1
Pin Name
SW
2
EN
3
SNS
4
FB
5
PG
6
SS
7
AGND
8
SVIN
9
VIN
10
PGND
EP
ePad
Pin Function
Switch output: Internal power MOSFET output switches.
Enable input: Logic high enables operation of the regulator. Logic low will shut down the device. Do
not leave floating.
Sense input: Connect to V_OUT as close to output capacitor as possible to sense output voltage.
Feedback input: The FB pin is regulated to 0.62V. Connect a resistor divider from the output to
ground to set the output voltage.
Power Good output: Open Drain output for the power good indicator. Place a resistor between this
pin and a voltage source to detect a power good condition.
Soft Start: Place a capacitor from SS pin to ground to program the soft start time. Do not leave this
pin floating. Minimum of 100pF C_SS is required.
Analog Ground: Connect to central ground point where all high current paths meet (C_IN, C_OUT,
PGND) for best operation.
Signal input voltage: This pin is connected externally to the VIN pin. A 2.2µF ceramic capacitor from
the SVIN pin to AGND must be placed next to the IC.
Power supply input voltage: The VIN pin is the input supply to the internal P-Channel Power
MOSFET. A 22µF ceramic is recommended for bypassing at VIN pin.
Power Ground.
Thermal pad. It must be connected to PGND on the PCB to improve the thermal performance.
August 2012
2
M9999-082912-A