MIC23153_11 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
September 2011
M9999-092211-B