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Manufacturer Part #


MCP1640 Series 575 kHz 350 mA Output Bypass Option Boost Regulator - SOT-23-6

Mfr. Name: Microchip
Standard Pkg:
Product Variant Information section
Date Code: 2043
Product Specification Section
Technical Attributes
Attributes Table
Topology: Boost
Input Voltage: 0.8V to 5.5V
Output Current-Max: 350mA
Output Type: Adjustable
Switching Frequency-Max: 575kHz
Operating Temp Range: -40°C to +85°C
Duty Cycle-Max: 90%
Efficiency: 96%
No. of Outputs: 1
Quiescent Current: 30µA
Storage Temperature Range: -65°C to +150°C
Load Regulation (%): 1%
Package Style:  SOT-23-6 (SOT-26)
Mounting Method: Surface Mount
Features & Applications

The MCP1640T-I/CHY is a compact, high-efficieny and fixed frequency Synchronous Boost Regulator with true output disconnect or input/output bypass option. Available in SOT-23-6 surface mount package.

Low-voltage technology allows the regulator to start up without high inrush current or output  voltage overshoot from a low 0.65V input


  • 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, typical 3.3V VOUT @ 1 mA
  • Low Operating Input Voltage: 0.35V, typical 3.3VOUT @ 1 mA
  • Adjustable Output Voltage Range: 2.0V to 5.5V
  • Maximum Input Voltage VOUT < 5.5V
  • PWM-only Operation
  • 500 kHz PWM Frequency
  • Low Device Quiescent Current: 19 μA, typical PFM mode
  • Internal Synchronous Rectifier
  • Internal Compensation
  • Inrush Current Limiting and Internal Soft-Start
  • Shutdown Current (All States): < 1 μA
  • Low Noise, Anti-Ringing Control
  • Overtemperature Protection


  • One, Two and Three Cell Alkaline and NiMH/NiCd Low-Power PIC® Portable Products
  • Single Cell Li-Ion to 5V Converters
  • Li Coin Cell Powered Devices
  • Personal Medical Products
  • Wireless Sensors
  • Handheld Instruments
  • GPS Receivers
  • Bluetooth Headsets
  • +3.3V to +5.0V Distributed Power Supply
Pricing Section
Minimum Order:
Multiple Of:
Factory Stock:Factory Stock:
Factory Lead Time:
20 Weeks
Web Price
Product Variant Information section