TC1219/TC1220 M Switched Capacitor Voltage Converters with Shutdown in SOT Packages Features General Description Charge Pumps in 6-Pin SOT-23A Package The TC1219/TC1220 are CMOS charge-pump voltage converters in ultra-small 6-Pin SOT-23A >95% Voltage Conversion Efficiency packages. They invert and/or double an input voltage Voltage Inversion and/or Doubling which can range from +2.5V to +5.5V. Conversion Operates from +2.5V to +5.5V efficiency is typically >95%. Switching frequency is Up to 25mA Output Current 12kHz for the TC1219, 35kHz for the TC1220. When Only Two External Capacitors Required the shutdown pin is held at a logic low, the device goes into a very low power mode of operation, consuming Low Power Consumption less than 1 A of supply current. Power-Saving Shutdown Mode External component requirement is only two capacitors TC1220 Compatible with 1.8V Logic Systems for standard voltage inverter applications. With a few additional components a positive doubler can also be Applications built. All other circuitry, including control, oscillator, LCD Panel Bias power MOSFETs are integrated on-chip. Typical supply Cellular Phones currents are 60 A (TC1219), 115 A (TC1220). Pagers All devices are available in 6-pin SOT-23A surface PDAs, Portable Dataloggers mount packages. Battery-Powered Devices Functional Block Diagram Device Selection Table Negative Voltage Inverter Osc. Operating Part + V Package Freq. Temp. C Input IN Number + (kHz) Range TC1219 C1 TC1220 TC1219ECH 6-Pin SOT-23A 12 -40C to +85C C ON TC1220ECH 6-Pin SOT-23A 35 -40C to +85C SHDN OFF Package Type V OUT 6-Pin SOT-23A Output GND C2 + SHDN GND C + 6 54 TC1219ECH TC1220ECH 12 3 V OUT IN C NOTE: 6-Pin SOT-23A is equivalent to the EIAJ SC-74 2002 Microchip Technology Inc. DS21366B-page 1TC1219/TC1220 Stresses above those listed underAbsolute Maximum 1.0 ELECTRICAL Rating may cause permanent damage to the device. These CHARACTERISTICS are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the Absolute Maximum Ratings* operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for Input Voltage (V to GND)....................... +6.0V, -0.3V IN extended periods may affect device reliability. Output Voltage (OUT to GND).................. -6.0V, +0.3V Current at OUT Pin..............................................50mA Short-Circuit Duration OUT to GND ............Indefinite Power Dissipation (T 70C) A 6-Pin SOT-23A .........................................240mW Operating Temperature Range.............-40C to +85C Storage Temperature (Unbiased) .......-65C to +150C TC1219/TC1220 ELECTRICAL SPECIFICATIONS Electrical Characteristics: T = -40C to +85C, V = +5V, C1 = C2 = 10 F, (TC1219), C1 = C2 = 3.3 F (TC1220), T = 25C A IN A unless otherwise noted. Symbol Parameter Min Typ Max Units Device Test Conditions I Supply Current 60 115 A TC1219 DD 115 325 TC1220 I Shutdown Supply Current 0.1 1.0 A SHDN = GND, V = 5V (Note 2) SHDN IN V Minimum Supply Voltage 2.5 VR = 1k MIN LOAD V Maximum Supply Voltage 5.5 V R = 1k MAX LOAD F Oscillator Frequency 6 12 20 kHz TC1219 OSC 19 35 56.3 TC1220 V SHDN Input Logic High V R = IH LOAD 1.5 TC1219 V = V to 3V IN MIN 1.8 V = >3V to V IN MAX 1.5 TC1220 V = V to V IN MIN MAX V SHDN Input Logic Low 0.5 V V = V to V IL IN MIN MAX P Power Efficiency 96 %R = 1k EFF LOAD 95 V Voltage Conversion Efficiency 95 99.9 %R = EFF LOAD R Output Resistance 25 65 TC1219/TC1220 I = 0.5mA to 25mA (Note 1) OUT LOAD Note 1: Capacitor contribution is approximately 20% of the output impedance ESR = 1/ pump frequency x capacitance . 2: V is guaranteed to be disconnected from OUT when the converter is in shutdown.. IN DS21366B-page 2 2002 Microchip Technology Inc.