TCM829

TCM828 TCM829 Switched Capacitor Voltage Converters FEATURES s s s s s s s Charge Pump in 5-Pin SOT-23A Package >95% Voltage Conversion Efficiency Voltage Inversion and/or Doubling Low 50µA (TCM828) Quiescent Current Operates from +1.5V to +5.5V Up to 25mA Output Current Only Two External Capacitors Required 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 (3.3µF 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 50µA (TCM828) and 115µA (TCM829). The TCM828 and TCM829 are available in a 5-Pin SOT-23A surface mount package. APPLICATIONS s s s s s LCD Panel Bias Cellular Phones Pagers PDAs, Portable Dataloggers Battery-Powered Devices PIN CONFIGURATION *5-Pin SOT-23A ORDERING INFORMATION Part No. Package 5-Pin SOT-23A 5-Pin SOT-23A Temp. Range – 40°C to +85°C – 40°C to +85°C OUT 1 5 C+ TCM828ECT TCM829ECT NOTE: 5-Pin SOT-23A is equivalent to EIAJ SC-74A. VIN 2 TCM828ECT TCM829ECT C– 3 4 GND NOTE: *5-Pin SOT-23A is equivalent to EIAJ SC-74A TYPICAL OPERATING CIRCUIT Voltage I...