MC1121 Datasheet - ON Semiconductor

MC1121 100mA Charge Pump Voltage Converter with Shutdown

Frequency control for internal oscillator, FC = open, FOSC = 10kHz typ; FC = VDD, FOSC = 200kHz typ, FC has no effect when OSC pin is driven externally Charge *pump capacitor, positive terminal Power *supply ground input CAP+ GND CAP * Charge *pump capacitor, negative ter.

MC1121 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. An on board oscillator operates at a typical frequency of 10kHz (at VDD = 5V) when the frequency control input (FC) is connected to ground. The oscillator frequency increases to 20.

MC1121 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

MC1121_ONSemiconductor.pdf