mcp1256电荷泵.pdfVIP

MCP1256/7/8/9 Regulated 3.3V, Low-Ripple Charge Pump with Low- Operating Current SLEEP Mode or BYPASS Mode Features Description ï Inductorless 1.5x, 2x Boost DC/DC Converter The MCP1256, MCP1257, MCP1258 and MCP1259 ï Output Voltage: 3.3V are inductorless, positive regulated charge pump DC/DC converters. The devices generate a regulated ï High Output Voltage Accuracy: 3.3V output voltage from a 1.8V to 3.6V input. The - ±3.0% (VOUT Fixed) devices are specifically designed for applications ï Output Current Up To 100 mA operating from 2-cell alkaline, Ni-Cd, or Ni-MH ï 20 mVPP Output Voltage Ripple batteries or by one primary lithium MnO2 (or similar) ï Thermal Shutdown and Short Circuit Protection coin cell battery. ï Uses Small Ceramic Capacitors The MCP1256, MCP1257, MCP1258 and MCP1259 ï Switching Frequency: 650 kHz provide high efficiency by automatically switching ï Low-Power SLEEP Mode: MCP1256/7 between 1.5x and 2x boost operation. In addition, at light output loads, the MCP1256 and MCP1257 can be ï BYPASS Mode: MCP1258/9 placed in a