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Microchip MCP1642B-ADJI/MS, Boost Converter, Step Up 800mA Adjustable, 1.15 MHz 8-Pin, MSOP

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RS Stock No.:
Mfr. Part No.:
UnitsPer unitPer Pack*
5 - 20£0.778£3.89
25 - 95£0.758£3.79
100 +£0.74£3.70
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MCP1642 Synchronous Boost Converter

The MCP1642 family of devices from Microchip are compact, high-efficiency, fixed-frequency, synchronous step-up DC-DC converters. These regulators are designed for applications powered by alkaline, NiCd, NiMH, Li-Ion or Li-Polymer batteries.


Up to 96% Typical Efficiency
1.8A Typical Peak Input Current Limit
IOUT > 175 mA @ 1.2V VIN, 3.3V VOUT
IOUT > 600 mA @ 2.4V VIN, 3.3V VOUT
IOUT > 800 mA @ 3.3V VIN, 5.0V VOUT
IOUT > 1A @ VIN > 3.6V, 5.0V VOUT
Low Start-up Voltage: 0.65V
Minimum Operating Input Voltage: 0.35V
Maximum Input Voltage < VOUT < 5.5V
Adjustable Output Voltage Range: 1.8V to 5.5V
PWM Operation at 1 MHz
Shutdown Current (All States): < 1 μA
Internal Synchronous Rectifier
Internal Compensation
Inrush Current Limiting and Internal Soft-Start
True Load Disconnect Shutdown (MCP1642B)
Input-to-Output Bypass Option (MCP1642D)
Low Noise, Anti-Ringing Control
Over-temperature Protection

Regulator FunctionStep Up
Maximum Output Current800mA
Number of Outputs1
Line Regulation±0.5 %/V
Load Regulation±1.5 %
Mounting TypeSurface Mount
Package TypeMSOP
Pin Count8
Output TypeAdjustable
Maximum Switching Frequency1.15 MHz
Switching RegulatorYes
Dimensions3 x 3 x 0.95mm
Maximum Input Voltage5.5 V
Maximum Output Voltage5.5 V
Maximum Operating Temperature+85 °C
Minimum Input Voltage0.65 V
Minimum Output Voltage1.8 V
Minimum Operating Temperature-40 °C