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TC1221

Microchip Technology
Part Number TC1221
Manufacturer Microchip Technology
Description High Frequency Switched Capacitor Voltage Converters
Published Aug 31, 2005
Detailed Description M Features • • • • • • • • TC1221/TC1222 General Description The TC1221/TC1222 are CMOS “charge-pump” voltage converter...
Datasheet PDF File TC1221 PDF File

TC1221
TC1221

Overview
M Features • • • • • • • • TC1221/TC1222 General Description The TC1221/TC1222 are CMOS “charge-pump” voltage converters in ultra-small 6-Pin SOT-23A packages.
They invert and/or double an input voltage which can range from +1.
8V to +5.
5V.
Conversion efficiency is typically 96%.
Switching frequency is 125kHz for the TC1221, 750kHz for the TC1222.
When the shutdown pin is held at a logic low, the device goes into a very low power mode of operation, consuming less than 1µA of supply current.
For standard voltage inverter applications, the device requires only two external capacitors.
With a few additional components a positive doubler can also be built.
All other circuitry, including control,...


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