MIC22200 Datasheet, PDF (2/22 Pages) Micrel Semiconductor – 2A Integrated Switch Synchronous Buck Regulator with Frequency Programmable from 800kHz to 4MHz

Micrel, Inc.
MIC22200
Ordering Information
Part Number
MIC22200YML
Nominal Output Voltage
Adjustable
Junction Temperature Range⁽¹⁾
−40°C to +125°C
Package
3mm × 3mm 12-Pin MLF^®
Note:
MLF^® is a green RoHS-compliant package. Lead finish is NiPdAu. Mold compound is halogen free.
Lead Finish
Lead Free⁽¹⁾
Pin Configuration
12-Pin MLF^® (ML)
Pin Description
Pin Number Pin Name
1
POR
2
RC
3
CF
4
SGND
5
COMP
6
FB
7
SVIN
8
PVIN
9
SW
10
PGND
11
DELAY
12
EN/DLY
ePad
GND
Pin Function
Power-On-Reset (output): Open drain output device indicates when the output is out of regulation
and is active after the delay set by the DELAY pin.
Ramp Control. Capacitor to GND from this pin determines the slew rate of output voltage during
start-up. This can be used for tracking capability as well as for soft start.
External capacitor to adjust switching frequency.
Signal Ground (signal): Ground (GND)
Compensation Pin (input): Placing an RC to GND will compensate the device. See Applications
section.
Feedback (input): Input to the error amplifier; connected to the external resistor divider network to
set the output voltage.
Signal Power Supply Voltage (input): Requires bypass capacitor to GND.
Power Supply Voltage (input): Requires bypass capacitor to GND.
Switch (output): From internal power MOSFET output switches.
Power Ground (power): Ground (GND)
Delay (input)
Enable (Input): When this pin is pulled higher than the enable threshold, the part will start up.
Below this voltage the device is in its low quiescent current mode. The pin has a 1µA current
source charging it to VIN. By adding a capacitor to this pin a delay may easily be generated. The
enable function will not operate with an input voltage lower than the min specified.
Exposed Pad (Power): You must make a full connection to a GND plane for full output power to be
released.
December 2010
2
M9999-120310-C