MIC33030 Datasheet, PDF (1/18 Pages) Micrel Semiconductor – 8MHz 400mA Internal Inductor Buck Regulator with HyperLight Load

MIC33030
8MHz 400mA Internal Inductor Buck
Regulator with HyperLight Load™
General Description
Features
The MIC33030 is a high-efficiency, 8MHz, 400mA ^{• Internal Inductor}
synchronous buck regulator with an internal inductor and
HyperLight Load™ mode. HyperLight Load™ provides
very-high efficiency at light loads and ultra-fast transient
− Simplifies design to two external capacitors
• Input voltage: 2.7V to 5.5V
• Output voltage accuracy of ±2.5% over temperature
response that is perfectly suited for supplying processor
core voltages. An additional benefit of this proprietary
architecture is the very-low output ripple voltage
throughout the entire load range with the use of small
output capacitors. The tiny 2.5mm x 2.0mm MLF^® package
saves precious board space and requires only two external
capacitors.
The MIC33030 is designed for use with tiny output
capacitors as small as 2.2µF. This gives the MIC33030 the
ease of use of an LDO with the efficiency of a HyperLight
Load™ DC converter.
The MIC33030 achieves efficiency in HyperLight Load™
mode as high as 78% at 1mA, with a very-low quiescent
current of 21µA. At higher loads, the MIC33030 provides a
constant switching frequency up to 8MHz.
The MIC33030 is available in a 10-pin 2.5mm x 2.0mm
MLF^® package with an operating junction temperature
range of –40°C to +125°C.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
• 400mA output current
• Efficiency up to 78% at 1mA
• 21µA typical quiescent current
• Up to 8MHz PWM operation in continuous mode
• Ultra-fast transient response
• Low-voltage output ripple
− 30mVpp ripple in HyperLight Load^™ mode
− 7mV output voltage ripple in full PWM mode
• Fully-integrated MOSFET switches
• 0.01µA shutdown current
• Thermal shutdown and current-limit protection
• Fixed and adjustable output voltage options available
(0.7V to 3.6V)
• 2.5mm x 2.0mm 10-Lead MLF^®
• –40°C to +125°C junction temperature range
Applications
• Mobile handsets
• Portable media/MP3 players
• Portable navigation devices (GPS)
• WiFi/WiMax/WiBro modules
• Digital Cameras
• Wireless LAN cards
• USB-powered devices
• Portable applications
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Typical Application
Fixed-Output MIC33030
Adjustable-Output MIC33030
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 2011
M9999-020311-C