MIC4930 Datasheet, PDF (1/17 Pages) Micrel Semiconductor – Hyper Speed Control 3A Buck Regulator

MIC4930
Hyper Speed Control™ 3A Buck Regulator
General Description
The MIC4930 is a high-efficiency, 3A synchronous buck
regulator with ultra-fast transient response perfectly suited
for supplying processor core and I/O voltages from a 5V or
3.3V bus. The MIC4930 provides a switching frequency up
to 3.3MHz while achieving peak efficiencies up to 95%. An
additional benefit of high-frequency operation is very low
output ripple voltage throughout the entire load range with
the use of a small output capacitor. The MIC4930 is
designed for use with a very small inductor, down to 1µH,
and an output ceramic capacitor as small as 10µF without
the need for external ripple injection. A wide range of
output capacitor types and values can also be
accommodated.
The MIC4930 supports safe start-up into a pre-biased
output.
The MIC4930 is available in a 10-pin 3mm × 4mm DFN
package with an operating junction temperature range
from –40°C to +125°C. The MIC4930 is pin-to-pin
compatible with the 5A-rated MIC4950YFL.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
 Input voltage: 2.7V to 5.5V
 3A output current
 Up to 95% efficiency
 Up to 3.3MHz operation
 Safe start-up into a pre-biased output
 Power Good output
 Ultra-fast transient response
 Low output voltage ripple
 Low R_DS(ON) integrated MOSFET switches
 0.01µA shutdown current
 Thermal shutdown and current limit protection
 Output voltage as low as 0.7V
 3mm × 4mm DFN-10L
 –40C to +125C junction temperature range
Applications
 DTVs
 Set-top boxes
 Printers
 DVD players
 Distributed power supplies
Typical Application
Hyper Speed Control is a trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
March 20, 2014
Revision 1.1