TCM828 TCM829 Switched Capacitor Voltage Converters FEATURES GENERAL DESCRIPTION Charge Pump in 5-Pin SOT-23A Package The TCM828/829 are CMOS charge-pump voltage >95% Voltage Conversion Efficiency converters in ultra-small 5-Pin SOT-23A packages. They Voltage Inversion and/or Doubling invert and/or double an input voltage which can range from Low 50 A (TCM828) Quiescent Current +1.5V to +5.5V. Conversion efficiency is typically >95%. Operates from +1.5V to +5.5V Switching frequency is 12kHz for the TCM828 and 35kHz for Up to 25mA Output Current the TCM829. Only Two External Capacitors Required External component requirement is only two capacitors (3.3 F nominal) for standard voltage inverter applications. APPLICATIONS With a few additional components a positive doubler can also be built. All other circuitry, including control, oscillator, LCD Panel Bias power MOSFETs are integrated on-chip. Supply current Cellular Phones is 50 A (TCM828) and 115 A (TCM829). Pagers The TCM828 and TCM829 are available in a 5-Pin PDAs, Portable Dataloggers SOT-23A surface mount package. Battery-Powered Devices PIN CONFIGURATION ORDERING INFORMATION *5-Pin SOT-23A Part No. Package Temp. Range TCM828ECT 5-Pin SOT-23A 40C to +85C + 1 5 C OUT TCM829ECT 5-Pin SOT-23A 40C to +85C NOTE: 5-Pin SOT-23A is equivalent to EIAJ SC-74A. V TCM828ECT IN 2 TCM829ECT C 4 GND 3 NOTE: *5-Pin SOT-23A is equivalent to EIAJ SC-74A TYPICAL OPERATING CIRCUIT Voltage Inverter + V C INPUT IN C1 C TCM828 TCM829 V OUT OUTPUT GND C2 2001 Microchip Technology Inc. DS21488A TCM828/829-4 5/22/00Switched Capacitor Voltage Converters TCM828 TCM829 Power Dissipation (T 70C) A ABSOLUTE MAXIMUM RATINGS* 5-Pin SOT-23A ...............................................240mW Input Voltage (V to GND) ......................... +6.0V, 0.3V IN Storage Temperature (Unbiased) ......... 65C to +150C Output Voltage (OUT to GND) .................... 6.0V, + 0.3V Lead Temperature (Soldering, 10 sec) ................. +300C Current at OUT Pin ..................................................50mA *This is a stress rating only and functional operation of the device at these Short-Circuit Duration OUT to GND ................ Indefinite or any other conditions above those indicated in the operational sections Operating Temperature Range ............... 40C to +85C of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS: T = 0C to +85C, V = +5V, C1 = C2 = 10 F (TCM828), C1 = C2 = 3.3 F A IN (TCM829), unless otherwise noted. Typical values are at T = +25C. A Symbol Parameter Device Test Conditions Min Typ Max Unit I Supply Current TCM828 T = +25C 50 90 A DD A TCM829 115 260 + V Minimum Supply R = 10k : T = 0C to +85C 1.5 V LOAD A Voltage + V Maximum Supply R = 10k 5.5 V LOAD Voltage F Oscillator Frequency TCM828 T = +25C 8.4 12 15.6 kHz OSC A TCM829 24.5 35 45.5 P Power Efficiency I = 3mA, T = +25C96% EFF LOAD A V Voltage Conversion R = 95 99.9 % EFF LOAD Efficiency R Output Resistance I = 5mA, T = 25C 25 50 OUT OUT A T = 0C to +85C 65 A NOTE: 1. Capacitor contribution is approximately 20% of the output impedance ESR = 1 / pump frequency x capacitance) . ELECTRICAL CHARACTERISTICS: T = 40C to +85C, V = +5V, C1 = C2 = 10 F (TCM828), C1 = C2 = 3.3 F A IN (TCM829) unless otherwise noted. Typical values are at T = +25C. (Note 2) A Symbol Parameter Device Test Conditions Min Typ Max Unit I Supply Current TCM828 115 A DD TCM829 325 + V Supply Voltage Range R = 10k 1.5 5.5 V LOAD F Oscillator Frequency TCM828 6 20 kHz OSC TCM829 19 54.3 R Output Resistance I = 5mA 65 OUT OUT NOTE: 2. All 40C to +85C specifications above are guaranteed by design. PIN DESCRIPTION Pin No. (5-Pin SOT-23A) Symbol Description 1 OUT Inverting charge pump output. 2V Positive power supply input. IN 3C Commutation capacitor negative terminal. 1 4 GND Ground. + 5C Commutation capacitor positive terminal. 1 2001 Microchip Technology Inc. DS21488A TCM828/829-4 5/22/00 2