MIC23201 Datasheet, PDF (1/20 Pages) Micrel Semiconductor – 2MHz PWM 2A Buck Regulator

MIC23201
2MHz PWM 2A Buck Regulator with
Hyper Speed Control™
General Description
The MIC23201 is a high efficiency 2MHz 2A synchronous
buck regulator with Hyper Speed Control. Micrel’s Hyper
Speed Control provides ultra-fast transient response which
is perfectly suited for supplying processor core voltages.
An additional benefit of this proprietary architecture is very
low output ripple voltage throughout the entire load range
with the use of small output capacitors. The tiny 3mm x
3mm MLF^® package saves precious board space and
requires only three external components.
The MIC23201 is designed for use with a very small
inductor, down to 1µH, and an output capacitor as small as
22µF that enables a total solution size, less than 1.5mm
height.
The MIC23201 provides a constant switching frequency
around 2MHz while achieving peak efficiencies up to 90%.
The MIC23201 is available in 10-pin 3mm x 3mm MLF
package with an operating junction temperature range
from –40C to +125C.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
 Input voltage: 2.7V to 5.5V
 2A output current
 Up to 90% peak efficiency
 Programmable Soft-Start
 Power Good Indicator
 2MHz switching frequency
 Safe for pre-biased output
 Ultra fast transient response
 Low voltage output ripple, 16mV at full load
 Fully integrated MOSFET switches
 0.01µA shutdown current
 Thermal shutdown and current limit protection
 Output Voltage as low as 0.95V
 10-pin 3mm x 3mm MLF
 –40C to +125C operating junction temperature range
Applications
 Low Voltage Point of Load
 Blu Ray DVD Players
 Networking Equipment
 Set Top Boxes
____________________________________________________________________________________________________________
Typical Application
100
90
80
70
60
50
40
30
20
10
0
0
Efficiency (VIN = 3.3V)
vs. Output Current
2.5V
1.8V
1.5V
1.2V
0.95V
VIN = 3.3V
0.6
1.2
1.8
2.4
3
OUTPUT CURRENT (A)
Hyper Speed Control is a trademark of Micrel, Inc.
MLF and MicroLeadFrame are registered trademark Amkor Technology Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
August 2012
M9999-082912-A