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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