MIC2251-2YD5-TR

The MIC2251 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. The MIC2251 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 MIC2251 incorporates a pseudo-random dithering function to reduce EMI levels up to 10 dB enabled by the DITH pin. The MIC2251 is designed for use with inductor values from 4.7 µH to 22 µH, and is stable with ceramic capacitors from 1 µF to 22 µF. The MIC2251 attains a high peak efficiency up to 90% at 100 mA and excellent light load efficiency of 80% at 1 mA. The MIC2251-1 is available in a 5-pin Thin SOT-23 package with dithering disabled, while the MIC2251-2 is available in a 5-pin Thin SOT-23 package with dithering enabled. The MIC2251 is available in a 8-pin 2 mm×2 mm DFN leadless package option with an operating junction temperature range of -40°C to +125°C.

Applications

• LCD/OLED Display Bias Supply
• CCD Bias Supply
• Mobile Phones, PDA, Media Players, GPS PND
• Haptic Displays
• Local 5V, 15V, 24V Rail

Key features

• Over 80% Efficient at 1 mA Load
• 2.5V to 5.5V Input Voltage Range
• Output Voltage Adjustable to 37V
• 1.6A Switch Current (typ.)
• 52 µA (typ.) Quiescent Current
• Constant Peak Current Control Reduces Output Ripple
• EMI Reduction Circuitry
• Stable with Small Ceramic Capacitors
• <1 µA Shutdown Current
• UVLO and Thermal Shutdown
• 8-Pin 2 mm×2 mm Leadless DFN Package (MIC2251)
• 5-Pin Thin SOT-23 Package (MIC2251-1 & MIC2251-2) Pin to Pin Compatible with MCP1661/3 (1.2A/1.8A Switch Current)
• -40°C to +125°C Junction Temperature Range