General Description
●The MCP16251/2 is a compact, high-efficiency, fixed frequency, synchronous step-up DC-DC converter. This family of devices provides an easy-to-use power supply solution for applications powered by either one-cell, two-cell or three-cell alkaline, NiCd, NiMH, one-cell Li-Ion or Li-Polymer batteries.
●Features:
●• Up to 96% Typical Efficiency
●•650 mA Typical Peak Input Current Limit:
●-IOUT > 100 mA @ 3.3V VOUT, 1.2V VIN
●-IOUT > 250 mA @ 3.3V VOUT, 2.4V VIN
●-IOUT > 225 mA @ 5.0V VOUT, 3.3V VIN
●• Low Device Quiescent Current:
●\- Output Quiescent Current: < 4 µA typical, device is not switching (VOUT > VIN, excluding feedback divider current)
●\- Input Sleep Current: 1 µA
●\- No Load Input Current: 14 µA typical
●• Shutdown Current: 0.6 µA typical
●• Low Start-up Voltage: 0.82V, 1 mA load
●• Low Operating Input Voltage: down to 0.35V
●• Adjustable Output Voltage Range: 1.8V to 5.5V
●• Maximum Input Voltage VOUT< 5.5V
●• Automatic PFM/PWM Operation:
●\- PWM Operation: 500 kHz
●\- PFM Output Ripple: 150 mV typical
●• Feedback voltage: 1.23V
●• Internal Synchronous Rectifier
●• Internal Compensation
●• Inrush Current Limiting and Internal Soft Start (1.5 ms typical)
●• Selectable, Logic Controlled, Shutdown States:
●\- True Load Disconnect Option (MCP16251)
●\- Input to Output Bypass Option (MCP16252)
●• Anti-Ringing Control
●• Overtemperature Protection
●• Available Packages:
●-SOT-23-6
●-2 x 3 8-Lead TDFN
●Applications:
●• One, Two and Three Cell Alkaline and NiMH/NiCd Portable Products
●• Solar Cell Applications
●• Personal Care and Medical Products
●• Bias for Status LEDs
●• Smartphones, MP3 Players, Digital Cameras
●• Remote controllers, Portable Instruments
●• Wireless Sensors
●• Bluetooth Headsets
●• +3.3V to +5.0V Distributed Power Supply
