12KHz开关频率,带低功耗关断模式DC-DC
General Description
The TC1219/TC1220 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 +2.5V to +5.5V. Conversion efficiency is typically >95%. Switching frequency is 12kHz for the TC1219, 35kHz for the TC1220. 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.
Features
• Charge Pumps in 6-Pin SOT-23A Package
• >95% Voltage Conversion Efficiency
• Voltage Inversion and/or Doubling
• Operates from +2.5V to +5.5V
• Up to 25mA Output Current
• Only Two External Capacitors Required
• Low Power Consumption
• Power-Saving Shutdown Mode
• TC1220 Compatible with 1.8V Logic Systems
Applications
• LCD Panel Bias
• Cellular Phones
• Pagers
• PDAs, Portable Dataloggers
• Battery-Powered Devices
