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TC1219 Datasheet(PDF) 1 Page - Microchip Technology |
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TC1219 Datasheet(HTML) 1 Page - Microchip Technology |
1 / 16 page 2002 Microchip Technology Inc. DS21366B-page 1 M TC1219/TC1220 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 Device Selection Table Package Type 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 1 µA of supply current. External component requirement is only two capacitors for standard voltage inverter applications. With a few additional components a positive doubler can also be built. All other circuitry, including control, oscillator, power MOSFETs are integrated on-chip. Typical supply currents are 60 µA (TC1219), 115µA (TC1220). All devices are available in 6-pin SOT-23A surface mount packages. Functional Block Diagram Part Number Package Osc. Freq. (kHz) Operating Temp. Range TC1219ECH 6-Pin SOT-23A 12 -40°C to +85°C TC1220ECH 6-Pin SOT-23A 35 -40°C to +85°C C+ C– TC1219ECH TC1220ECH 12 3 54 VIN SHDN GND 6-Pin SOT-23A NOTE: 6-Pin SOT-23A is equivalent to the EIAJ SC-74 OUT 6 TC1219 TC1220 VIN V– Output C+ C– C1 C2 Input GND OUT SHDN ON OFF + + Negative Voltage Inverter Switched Capacitor Voltage Converters with Shutdown in SOT Packages |
Número de pieza similar - TC1219 |
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Descripción similar - TC1219 |
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