MCP1257

MCP1256/7/8/9 Regulated 3.3V, Low-Ripple Charge Pump with LowOperating Current SLEEP Mode or BYPASS Mode 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 PIC® MCU Bias Typical Application INPUT 1.8V to 3.6V CIN 10 µF C1 1 µF ON / OFF MCP1256 7 VIN VOUT 5 10 SHDN PGOOD 1 4 C1+ 8 C1- C2+ 6 C2- 3 2 SLEEP GND 9 OUTPUT 3.3V R1 COUT 10 µF C2 1 µF Power-Good Indication Typical Application with Power-Good Indication 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. The MCP1256, MCP1257, MCP1258 and MCP...