Description
The MCP1256, MCP1257, MCP1258 and MCP1259 are inductorless, positive regulated charge pump DC/DC converters. The devices generate a regulated 3.3V output voltage from a 1.8V to 3.6V input. The devices are specifically designed for applications operating from 2-cell alkaline, Ni-Cd, or Ni-MH batteries or by one primary lithium MnO2 (or similar) coin cell battery.

Features
• Inductorless 1.5x, 2x Boost DC/DC Converter
• Output Voltage: 3.3V
• High Output Voltage Accuracy:
   - ±3.0% (VOUT Fixed)
• Output Current Up To 100 mA
• 20 mVPP Output Voltage Ripple
• Thermal Shutdown and Short Circuit Protection
• Uses Small Ceramic Capacitors
• Switching Frequency: 650 kHz
• Low-Power SLEEP Mode: MCP1256/7
• BYPASS Mode: MCP1258/9
• Low-Power Shutdown Mode: 0.1 μA (Typical)
• Shutdown Input Compatible with 1.8V Logic
• VIN Range: 1.8V to 3.6V
• Soft-Start Circuitry to Minimize Inrush Current
• Temperature Range: -40°C to +125°C
• Packaging:
   - 10-Pin, 3 mm x 3 mm DFN
   - 10-Pin, MSOP

Applications
• Pagers
• Portable Measurement Instruments
• Home Automation Products
• PICmicro® MCU Bias