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MC1121DMR2 Scheda tecnica(PDF) 1 Page - ON Semiconductor |
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MC1121DMR2 Scheda tecnica(HTML) 1 Page - ON Semiconductor |
1 / 8 page © Semiconductor Components Industries, LLC, 1999 February, 2000 – Rev. 0 1 Publication Order Number: MC1121/D 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 200kHz when FC is connected to VDD, allowing the use of smaller capacitors. Operation at sub–10kHz frequencies results in lower quiescent current and is accomplished with the addition of an external capacitor from OSC (pin 7) to ground. The MC1121 can be driven from an external clock connected OSC. Typical supply current at 10kHz is 50 µA, and falls to less than 1 µA when the shutdown input is brought low, whether the internal or an external clock is used. The MC1121 is available in a Micro–8 package. 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 FUNCTIONAL BLOCK DIAGRAM MC1121 + + C2 C1 OSC CONTROL RC OSCILLATOR LOGIC CIRCUITS SWITCH MATRIX – CAP– CAP+ Vout SHDN FC OSC VDD GND Micro8 DM SUFFIX CASE TBD PRELIMINARY INFORMATION http://onsemi.com PIN CONFIGURATION (Top View) MC1121 1 2 3 4 8 7 6 5 FC CAP+ GND CAP– VDD OSC SHDN VOUT Device Package Shipping ORDERING INFORMATION MC1121DMR2 Micro–8 2500 Tape/Reel |
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