MIC2253 Datasheet, PDF (1/13 Pages) Micrel Semiconductor – 3.5A 1MHz High Efficiency Boost Regulator with OVP and Softstart

MIC2253
3.5A 1MHz High Efficiency
Boost Regulator with OVP and Softstart
General Description
Features
The MIC2253 is a high power density 1MHz PWM DC/DC
boost regulator. The 3.5A minimum switch current limit
combined with a 1MHz switching frequency allows the
MIC2253 to use smaller inductors and deliver high power
in a tiny solution size.
The 2.5V to 10V input voltage range of MIC2253 allows
direct operation from 1 and 2 cell Li-ion as well as 3 to 4
cell NiCad, NiMH, Alkaline or lithium batteries. Maximum
battery life is assured with a low 0.1µA shutdown current.
The MIC2253 is available in a low profile 12-pin 3mm x
3mm MLF^© package. To prevent a high inrush current, a
minimum 1ms soft-start period is set by default and the
MIC2253 has the ability to extend the soft-start period with
an external capacitor.
Datasheet and support documentation can be found on
Micrel’s web site at: www.micrel.com.
• 3.5A minimum switch current
• 1.245V ± 3% feedback voltage
• 2.5V to 10V input voltage
• Output over-voltage protection (OVP)
• Externally programmable soft-start
• Output voltage up to 30V (max)
• Fixed 1MHz operation
• <1% line regulation
• 0.1µA shutdown current
• Over temperature protection
• Under-voltage lockout (UVLO)
• 12-pin 3mm x 3mm leadless MLF^® package
• –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
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
February 2010
M9999-021710-B