MIC23150
4MHz PWM 2A Buck Regulator with
HyperLight Load™
General Description
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
HyperLight Load™
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.
• Low ripple output voltage
− 14mVpp ripple in HyperLight Load™ mode
− 5mV output voltage ripple in full PWM mode
• Fully integrated MOSFET switches
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.
• 0.01µA shutdown current
• Thermal shutdown and current limit protection
• Output Voltage as low as 0.95V
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.
• 8-pin 2mm x 2mm Thin MLF®
• –40°C to +125°C junction temperature range
Applications
• Mobile handsets
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.
• 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
Efficiency
= 1.8V
V
L1
OUT
100
90
80
70
60
50
40
VIN
EN
VOUT
C2
V
= 3.0V
V
= 3.6V
V
= 2.7V
IN
IN
IN
VIN
SW
C1
2mm×2mm
ThinMLF
SNS
EN
AGND
PGND
L = 1.0µH
= 4.7µF
C
GND
OUT
100
GND
1
10
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 +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-102309-B
October 2009