MIC23153 Datasheet, PDF (1/18 Pages) Micrel Semiconductor – 4MHz PWM 2A Buck Regulator with HyperLight Load™ and Power Good

MIC23153
4MHz PWM 2A Buck Regulator with
HyperLight Load™ and Power Good
General Description
Features
The MIC23153 is a high efficiency 4MHz 2A synchronous
buck regulator with HyperLight Load™ mode, Power Good
output indicator, and programmable soft-start. HyperLight
Load™ provides very high efficiency at light loads and
ultra-fast transient response which makes the MIC23153
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 2.5mm x
2.5mm Thin MLF^® package saves precious board space
and requires only four external components.
The MIC23153 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
in height.
The MIC23153 has a very low quiescent current of 22µA
and achieves a peak efficiency of 93% in continuous
conduction mode. In discontinuous conduction mode, the
MIC23153 can achieve 85% efficiency at 1mA.
The MIC23153 is available in 10-pin 2.5mm x 2.5mm 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
• Output voltage: fixed or adjustable (0.62V to 3.6V)
• Up to 2A output current
• Up to 93% peak efficiency
• 85% typical efficiency at 1mA
• Power Good output
• Programmable soft-start
• 22µA typical quiescent current
• 4MHz PWM operation in continuous mode
• Ultra fast transient response
• Low ripple output voltage
− 35mVpp 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
• 10-pin 2.5mm x 2.5mm Thin MLF^®
• –40°C to +125°C junction temperature range
Applications
• Solid State Drives (SSD)
• Mobile handsets
• Portable media/MP3 players
• Portable navigation devices (GPS)
• WiFi/WiMax/WiBro modules
• Wireless LAN cards
• Portable applications
____________________________________________________________________________________________________________
Typical Application
Fixed Output Voltage
Adjustable Output Voltage
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
December 2009
M9999-121409-A