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MIC2290

Micrel Semiconductor
Part Number MIC2290
Manufacturer Micrel Semiconductor
Description 2mm 2mm PWM Boost Regulator with Internal Schotty Diode
Published Mar 26, 2005
Detailed Description MIC2290 Micrel MIC2290 2mm × 2mm PWM Boost Regulator with Internal Schotty Diode General Description The MIC2290 is a...
Datasheet PDF File MIC2290 PDF File

MIC2290
MIC2290

Overview
MIC2290 Micrel MIC2290 2mm × 2mm PWM Boost Regulator with Internal Schotty Diode General Description The MIC2290 is a 1.
2MHz , PWM, boost-switching regulator housed in the small size 2mm × 2mm MLF™-8 package.
The MIC2290 features an internal Schottky diode that reduces circuit board area and total solution cost.
High power density is achieved with the MIC2290’s internal 34V/0.
5A switch, allowing it to power large loads in a tiny footprint.
The MIC2290 implements a constant frequency 1.
2MHz PWM control scheme.
The high frequency operation saves board space by reducing external component sizes.
The fixed frequency PWM topology also reduces switching noise and ripple to the input power source.
The MIC2290’s wide 2.
5V to 10V input voltage allows direct operation from 3- to 4-cell NiCad/NiMH/Alkaline batteries, 1and 2-cell Li Ion batteries, as well as fixed 3.
3V and 5V systems.
The MIC2290 is available in a low-profile 2mm × 2mm 8-pin MLF™ leadless package and operates from a junction temperature range of –40°C to +125°C.
All support documentation can be found on Micrel’s web site at www.
micrel.
com.
Features • • • • • • • • • • • • • • Internal Schottky diode 2.
5V to 10V input voltage Output voltage adjustable to 34V Over 500mA switch current 1.
2MHz PWM operation Stable with ceramic capacitors <1% line and load regulation Low input and output ripple <1µA shutdown current UVLO Output overvoltage protection Over temperature protection 2mm × 2mm 8-pin MLF™ package –40°C to +125°C junction temperature range Applications • • • • • Organic EL power supply TFT LCD bias supply 12V DSL power supply CCD bias supply SEPIC converters Typical Application VIN L1 10µH VOUT 12V 85 12VOUT Efficiency VIN = 4.
2V 2 VIN EN SW OUT FB 7 EFFICIENCY (%) MIC2290BML R1 1 6 80 75 70 65 60 0 VIN = 3.
2V VIN = 3.
6V Li Ion Battery 3 C1 1 µF GND 4, 8 C2 10µF R2 0.
02 0.
04 0.
06 0.
08 LOAD CURRENT (A) 0.
1 Simple 12V Boost Regulator MicroLeadFrame and MLF are trademarks of Amkor Techno...


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