MIC2145

The MIC2145 is a small size boost switching regulator that can provide over 2.5W of output power. The input voltage range is between 2.4V to 16V, making the device suitable for one-cell Li-Ion and 3- to 4-cell alkaline/NiCad/NiMH applications. The output voltage of the MIC2145 can be adjusted up to 16V.

The MIC2145 is well suited for portable, space-sensitive applications. Its typical 450kHz operation allows small surface mount external components to be used. The MIC2145 has a low quiescent current of 200µA, and a typical shutdown current of 0.5µA. The MIC2145 is capable of high efficiencies in a small board area.

The MIC2145 features a low-on resistance internal switch that allows it to provide over 2.5W of output power. The peak switch current can be programmed through an external resistor. This allows the user to set the peak switch current at the level where maximum efficiency occurs. It also allows the user to further optimize for efficiency and inductor size by setting the peak current below the level of inductor saturation.

The MIC2145 is available in an MSOP-8 and 3mm x 3mm MLF®-10L package with an ambient operating temperature range from -40°C to +85°C.

Features
  • 2.4V to 16V input voltage
  • Output adjustable to 16V
  • Programmable peak current limit
  • Soft start
  • Up to 450kHz switching frequency
  • 0.5µA shutdown current
  • 200µA quiescent current
  • Capable of 5V/500mA output with 3.3V input
  • Achieves over 85% efficiency
  • Implements low power boost, SEPIC, and flyback topologies
  • MSOP-8 and 3mm x 3mm MLF®-10L
Parameter
Parameter Name Value Value
Regulator Type Step Up (Boost) Step Up (Boost)
Input Voltage Range Min (V) 2.4 2.4
Input Voltage Range Max (V) 16 16
Output Voltage Range Min (V) 2.4 2.4
Output Voltage Range Max (V) 16 16
Quiescent Current (mA) typ 0.2 0.2
Switching Frequency (kHz) 450 450
Synchronous Rectifier Yes Yes
Operating Temp Range -40 to 85 -40 to 85
Vfb (V) 1.08 1.08
SHUTDOWN Current (µA) (Typ) 0.5 0.5
Switch current (A) typ 0.9 0.9
Alternative Topology SEPIC, Flyback SEPIC, Flyback
Documents
MIC2145 - High Efficiency 2.5W Boost ConverterData Sheets11/05/2015477KB
Micrel AN 55 - LEDs vs. CCFLAppNote10/02/201537KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC2145YML-TR10VDFN-40C to +85CT/R**********
MIC2145YMM8MSOP-40C to +85CTUBE**********
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC2145YMM-TR0.0251000.3347008MSOP3x3x1.0mmNiPdAue4
MIC2145YMM0.0251000.1246008MSOP3x3x1.0mmNiPdAue4
MIC2145YML-TR0.64370210VDFN3x3x0.9mmNiPdAue4
MIC2145YML0.04800010VDFN3x3x0.9mmNiPdAue4
MIC2145 - High Efficiency 2.5W Boost Converter MIC2145
Micrel AN 55 MIC2145
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