MIC23150 Datasheet, PDF (1/15 Pages) Micrel Semiconductor – 4MHz PWM 2A Buck Regulator with HyperLight Load

MIC23150
4MHz PWM 2A Buck Regulator with
HyperLight Load™
General Description
Features
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 x 2mm Thin MLF^®
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 x 2mm Thin
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.
• Input voltage: 2.7V to 5.5V
HyperLight Load™
• 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
• Fully integrated MOSFET switches
• 0.01µA shutdown current
• Thermal shutdown and current limit protection
• Output Voltage as low as 0.95V
• 8-pin 2mm x 2mm Thin MLF^®
• –40°C to +125°C junction temperature range
Applications
• Mobile handsets
• Portable media/MP3 players
• Portable navigation devices (GPS)
• WiFi/WiMax/WiBro modules
• Solid State Drives/Memory
• Wireless LAN cards
• Portable applications
____________________________________________________________________________________________________________
Typical Application
U1 MIC23150
VIN
VIN
L1
SW
C1
2mm×2mm
EN
ThinMLF SNS
EN
GND
AGND PGND
VOUT
C2
GND
Efficiency
100
VOUT = 1.8V
VIN = 2.7V ^{VIN = 3.0V VIN = 3.6V}
90
80
70
60
50
4011
L = 1.0µH
COUT = 4.7µF
0 100 1000 10000
OUTPUT CURRENT (mA)
HyperLight Load 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
February 2009
M9999-082908-A