MIC2250
High-Efficiency Low EMI
Boost Regulator
General Description
Features
The MIC2250 is a general purpose DC/DC boost switching
regulator that features low noise, EMI reduction circuitry,
and high efficiency across a wide output current range.
• Over 80% efficient for a 300:1 load range
• 2.5V to 5.5V input voltage range
• Output voltage adjustable to 32V
The MIC2250 is optimized for noise-sensitive hand held
battery powered applications. A proprietary control method
allows low ripple across the output voltage and current
ranges. The MIC2250 incorporates a pseudo-random
dithering function to reduce EMI levels up to 10dB enabled
by the DITH pin.
• 52µA (typ) quiescent current
• Constant peak current control reduces output ripple
• EMI reduction circuitry
• Stable with small ceramic capacitors
• <1µA shutdown current
The MIC2250 is designed for use with inductor values from
4.7µH to 22µH, and is stable with ceramic capacitors from
1µF to 22µF.
• UVLO and thermal shutdown
• 8-pin 2mm x 2mm leadless MLF® package (MIC2250)
• 5-pin Thin SOT-23 package (MIC2250-1 & -2)
• –40°C to +125°C junction temperature range
The MIC2250 attains a high peak efficiency up to 90% at
100mA and excellent light load efficiency of 80% at 1mA.
High power density is achieved with the MIC2250’s
internal 34V/2A rated switch, allowing it to power large
loads in a tiny footprint.
Applications
The MIC2250-1 is available in a 5-pin Thin SOT-23
package with dithering disabled. While the MIC2250-2 is
available in a 5-pin Thin SOT-23 package with dithering
enabled. The MIC2250 is available in 8-pin 2mm x 2mm
MLF® leadless package option with an operating junction
temperature range of –40°C to +125°C.
• LCD/OLED display bias supply
• CCD bias supply
• Mobile Phones, PDA, Media Players, GPS PND
• Haptic displays
• Local 5V, 15V, 24V rail
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
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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 +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-041811-B
April 2011