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TCM828 Datasheet(PDF) 1 Page - Microchip Technology |
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TCM828 Datasheet(HTML) 1 Page - Microchip Technology |
1 / 9 page TCM828/829-4 5/22/00 TCM828 TCM829 © 2001 Microchip Technology Inc. DS21488A Switched Capacitor Voltage Converters FEATURES s Charge Pump in 5-Pin SOT-23A Package s >95% Voltage Conversion Efficiency s Voltage Inversion and/or Doubling s Low 50 µA (TCM828) Quiescent Current s Operates from +1.5V to +5.5V s Up to 25mA Output Current s Only Two External Capacitors Required APPLICATIONS s LCD Panel Bias s Cellular Phones s Pagers s PDAs, Portable Dataloggers s Battery-Powered Devices GENERAL DESCRIPTION The TCM828/829 are CMOS “charge-pump” voltage converters in ultra-small 5-Pin SOT-23A packages. They invert and/or double an input voltage which can range from +1.5V to +5.5V. Conversion efficiency is typically >95%. Switching frequency is 12kHz for the TCM828 and 35kHz for the TCM829. External component requirement is only two capacitors (3.3 µF nominal) 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. Supply current is 50 µA (TCM828) and 115µA (TCM829). The TCM828 and TCM829 are available in a 5-Pin SOT-23A surface mount package. TYPICAL OPERATING CIRCUIT ORDERING INFORMATION Part No. Package Temp. Range TCM828ECT 5-Pin SOT-23A – 40 °C to +85°C TCM829ECT 5-Pin SOT-23A – 40 °C to +85°C NOTE: 5-Pin SOT-23A is equivalent to EIAJ SC-74A. PIN CONFIGURATION TCM828 TCM829 VIN V– OUTPUT C+ C– C1 C2 INPUT GND OUT C+ C– OUT TCM828ECT TCM829ECT 1 2 3 5 GND VIN 4 *5-Pin SOT-23A NOTE: *5-Pin SOT-23A is equivalent to EIAJ SC-74A Voltage Inverter |
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Similar Description - TCM828 |
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