标题: MCP1256/7/8/9 Data Sheet [打印本页] 作者: admin 时间: 2010-4-17 14:59 标题: MCP1256/7/8/9 Data Sheet MCP1256/7/8/9 Data Sheet
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 MCP1259 provide high efficiency by automatically switching between 1.5x and 2x boost operation. In addition, at light output loads, the MCP1256 and MCP1257 can be placed in a SLEEP mode lowering the quiescent current while maintaining the regulated output voltage. Alternatively, the MCP1258 and MCP1259 provide a bypass feature connecting the input voltage to the output. This allows for real-time clocks, microcontrollers or other system devices to remain biased with virtually no current being consumed by the MCP1258 or MCP1259.
Parameter Name Value
Typical Active Output Current (mA) 100
Output Voltage (V) 3.3
Typical Quiescent Current (µA) 10
Input Voltage Range (V) 1.8 to 3.6
Operating Temp. Range (°C) -40 to 125
Device Description Regulated
Features
Inductorless 1.5x, 2x Boost DC/DC Converter (Charge Pump)
High Output Voltage Accuracy: +/-3.0% (VOUT Fixed)
Output Current Up To 100 mA
20 mVpp Output Voltage Ripple
Wide Operating Temperature Range-40°C to +125°C)
Thermal Shutdown and Short Circuit Protection
Uses small Ceramic Capacitors
Switching Frequency: 650 kHz
Power Good Output
Low Power SLEEP Mode
Low Power Shutdown Mode: 0.1 µA (Typical)
Shutdown Input Compatible with 1.8V Logic
VIN Range: 1.8V to 3.6V
Output Voltage: 3.3V
Soft-Start Circuitry to Minimize In-Rush Current
Packages: 10-Pin MSOP and 10-Lead 3 mm x 3 mm DFN
-40°C to +125°C)