MIC23150_15 Datasheet, PDF (1/18 Pages) Micrel Semiconductor – 4MHz, PWM, 2A Buck Regulator with HyperLight Load

MIC23150
4MHz, PWM, 2A Buck Regulator with
HyperLight Load^®
General Description
The MIC23150 is a high-efficiency 4MHz 2A synchronous
buck regulator with HyperLight Load^® mode. HyperLight
Load provides very high efficiency at light loads and 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 2mm × 2mm Thin DFN
(TDFN) package saves precious board space and requires
only three external components.
The MIC23150 is designed for use with a very small
inductor, down to 0.47µH, and an output capacitor as small
as 2.2 µF that enables a total solution size, less than 1mm
height.
The MIC23150 has a very low quiescent current of 23µA
and achieves a peak efficiency of 93% in continuous
conduction mode. In discontinuous conduction mode, the
MIC23150 can achieve 87% efficiency at 1mA.
The MIC23150 is available in 8-pin 2mm × 2mm Thin DFN
package with an operating junction temperature range
from –40°C to +125°C.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
HyperLight Load^®
Features
• Input voltage: 2.7V to 5.5V
• 2A output current
• Up to 93% peak efficiency
• 87% typical efficiency at 1mA
• 23µA typical quiescent current
• 4MHz PWM operation in continuous mode
• Ultra-fast transient response
• Low ripple output voltage
− 14mVpp ripple in HyperLight Load mode
− 5mV output voltage ripple in full PWM mode
• 0.01µA shutdown current
• Thermal-shutdown and current-limit protection
• Output voltage as low as 0.95V
• 8-pin 2mm × 2mm Thin DFN (TDFN) package
Applications
• Mobile handsets
• Portable media/MP3 players
• Portable navigation devices (GPS)
• WiFi/WiMax/WiBro modules
• Solid State Drives/Memory
• Wireless LAN cards
Typical Application
HyperLight Load is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
February 5, 2015
Revision 2.1