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100mA Charge Pump Voltage Converter with Shutdown

The MC1121 is a charge pump converter with 100mA output current capability. It converts a 2.4V to 5.5V input to a corresponding negative output voltage. As with all charge pump converters, the MC1121 uses no inductors saving cost, size, and reducing EMI.

Features

• Converts a 2.4V to 5.5V Input Voltage to a Corresponding Negative Output Voltage (Inverter Mode)

• Uses Only 2 Capacitors; No Inductors Required!

• High Output Current: 100mA

• Selectable Oscillator Frequency: 10kHz to 200kHz

• Power–Saving Shutdown Input

• Optional High–Frequency Operation Allows Use of Small Capacitors

• Low Operating Current (FC = GND): 50µA

• Tested Operating Temperature Range: –40°C to +85°C

Typical Applications

• Laptop Computers

• Medical Instruments

• Disk Drives

• µP–Based Controllers

• Process Instrumentation