The MCP1640/40B/40C/40D is a compact, high-efficiency, fixed frequency, synchronous step-up DC-DC converter. It 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. The The MCP1640/40B/40C/40D provides very high efficiency through integration of the low resistance N-Channel Boost switch and synchronous P-Channel switch.

Parameter Name	Value
Device Description	Step-up DC/DC Regulator
SW Reg Output	Variable
Typical Active Supply (µA)	19
Switching Frequency (kHz)	500
Output Current (mA)	350
Output Voltage (V)	2.0 to 5.5
Input Voltage Range (V)	0.65 to 5.5

Features

Up to 96% Typical Efficiency

800 mA Typical Peak Input Current Limit: - IOUT > 100 mA @ 1.2V VIN, 3.3V VOUT - IOUT > 350 mA @ 2.4V VIN, 3.3V VOUT - IOUT > 350 mA @ 3.3V VIN, 5.0V VOUT

Low Start-up Voltage: 0.65V

Low Operating Input Voltage: 0.35V

Adjustable Output Voltage Range: 2.0V to 5.5V

Maximum Input Voltage < VOUT < 5.5V

Automatic PFM/PWM Operation: PWM Operation at 500 kHz

Low Device Quiescent Current: 19 μA, typical PFM Mode

Internal Synchronous Rectifier

Internal Compensation

Inrush Current Limiting and Internal Soft-Start

True Load Disconnect Shutdown

Shutdown Current (All States): < 1 μA

Low Noise, Anti-Ringing Control

Overtemperature Protection

SOT23-6 or 2x3 8-Lead DFN packages

MCP1640/B/C/D Data Sheet