LTC1754-3.3/LTC1754-5 Micropower, Regulated 3.3V/5V Charge Pump with Shutdown in SOT-23 FEATURES DESCRIPTIO n Ultralow Power: I = 13m A The LTC 1754 is a micropower charge pump DC/DC IN n Regulated Output Voltage: 3.3V 4%, 5V 4% converter that produces a regulated output. The input n 5V Output Current: 50mA (V 3.0V) voltage range is 2V to 4.4V for 3.3V output and 2.7V to IN n 3.3V Output Current: 40mA (V 2.5V) 5.5V for 5V output. Extremely low operating current and a IN n No Inductors Needed low external parts count (one flying capacitor and two n Very Low Shutdown Current: <1m A small bypass capacitors at V and V ) make the LTC1754 IN OUT n Shutdown Disconnects Load from V ideally suited for small, battery-powered applications. The IN n Internal Oscillator: 600kHz total component area of the application circuit shown 2 n Short-Circuit and Overtemperature Protected below is only 0.052 inch . 2 n Ultrasmall Application Circuit: (0.052 Inch ) TM The LTC1754 operates as a Burst Mode switched capaci- n 6-Pin SOT-23 Package tor voltage doubler to produce a regulated output. It has thermal shutdown capability and can survive a continuous U short circuit from V to GND. APPLICATIO S OUT The LTC1754 is available in a 6-pin SOT-23 package. n SIM Interface Supplies for GSM Cellular Telephones , LTC and LT are registered trademarks of Linear Technology Corporation. n White LED Power Supplies Burst Mode is a trademark of Linear Technology Corporation. n Li-Ion Battery Backup Supplies n Handheld Computers n Smart Card Readers n PCMCIA Local 5V Supplies TYPICAL APPLICATIO LTC1754-3.3 LTC1754-5 Output Voltage vs Supply Voltage Output Voltage vs Supply Voltage 1 6 + V V C OUT OUT 3.40 5.15 10m F 1m F LTC1754-X I = 20mA 2 5 OUT I = 25mA OUT GND V V IN C = 10f IN OUT C = 10F OUT C = 1F 5.10 FLY C = 1F 10m F FLY 3 4 3.35 ON/OFF SHDN C 1754 TA01 5.05 T = 85C A T = 25C T = 85C A A Regulated 3.3V Output from 2V to 4.4V Input 3.30 T = 25C 5.00 A V = 3.3V 4% OUT T = 40C T = 40C A A I = 0mA TO 20mA, V > 2.0V OUT IN 4.95 I = 0mA TO 40mA, V > 2.5V OUT IN 3.25 4.90 Regulated 5V Output from 2.7V to 5.5V Input V = 5V 4% OUT I = 0mA TO 25mA, V > 2.7V OUT IN 3.20 4.85 I = 0mA TO 50mA, V > 3.0V 2.0 2.5 3.0 3.5 4.0 4.5 2.5 3.5 4.0 4.5 5.0 5.5 3.0 OUT IN SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) 1754 TA02 1574 TA03 1 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) U ULTC1754-3.3/LTC1754-5 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) ORDER PART V to GND .................................................. 0.3V to 6V IN TOP VIEW NUMBER V to GND ............................................... 0.3V to 6V OUT + V 1 6 C OUT SHDN to GND .............................................. 0.3V to 6V LTC1754ES6-3.3 GND 2 5 V IN I (Note 4) ......................................................... 75mA OUT LTC1754ES6-5 SHDN 3 4 C V Short-Circuit Duration ............................ Indefinite OUT S6 PART MARKING S6 PACKAGE Operating Temperature Range (Note 3) ... 40 C to 85 C 6-LEAD PLASTIC SOT-23 Storage Temperature Range .................. 65 C to 150 C LTGK T = 150 C, q = 230 C/ W JMAX JA Lead Temperature (Soldering, 10 sec)................... 300 C LTLW Consult factory for Industrial and Military grade parts. ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the full operating temperature range, otherwise specifications are at T = 25 C. C = 1m F (Note 2), C = 10m F, C = 10m F. A FLY IN OUT SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS LTC1754-3.3 V Input Supply Voltage l 2.0 4.4 V IN V Output Voltage 2.0V V 4.4V, I 20mA l 3.17 3.30 3.43 V OUT IN OUT 2.5V V 4.4V, I 40mA l 3.17 3.30 3.43 V IN OUT I Operating Supply Current 2.0V V 4.4V, I = 0mA, SHDN = V l 11 30 m A CC IN OUT IN V Output Ripple V = 2.5V, I = 40mA 23 mV R IN OUT P-P h Efficiency V = 2.0V, I = 20mA 82 % IN OUT f Switching Frequency Oscillator Free Running 600 kHz OSC t V Turn-On Time V = 2.0V, I = 0mA 0.8 ms ON OUT IN OUT I Output Short-Circuit Current V = 2.5V, V = 0V, SHDN = 2.5V 118 mA SC IN OUT LTC1754-5 V Input Supply Voltage l 2.7 5.5 V IN V Output Voltage 2.7V V 5.5V, I 25mA l 4.8 5.0 5.2 V OUT IN OUT 3.0V V 5.5V, I 50mA l 4.8 5.0 5.2 V IN OUT I Operating Supply Current 2.7V V 5.5V, I = 0mA, SHDN = V l 13 30 m A CC IN OUT IN V Output Ripple V = 3V, I = 50mA 65 mV R IN OUT P-P h Efficiency V = 3V, I = 50mA 82.7 % IN OUT f Switching Frequency Oscillator Free Running 700 kHz OSC t V Turn-On Time V = 3V, I = 0mA 0.4 ms ON OUT IN OUT I Output Short-Circuit Current V = 3V, V = 0V, SHDN = 3V 150 mA SC IN OUT LTC1754-3.3/LTC1754-5 I Shutdown Supply Current V 3.6V, I = 0mA, V = 0V l 0.01 1 m A SHDN IN OUT SHDN 3.6V < V , I = 0mA, V = 0V l 2.5 m A IN OUT SHDN V SHDN Input Threshold (High) l 1.4 V IH V SHDN Input Threshold (Low) l 0.3 V IL I SHDN Input Current (High) SHDN = V l 1 1 m A IH IN I SHDN Input Current (Low) SHDN = 0V l 1 1 m A IL Note 1: Absolute Maximum Ratings are those values beyond which the life of Note 3: The LTC1754ES6-X is guaranteed to meet performance a device may be impaired. specifications from 0 C to 70 C. Specifications over the 40 C to 85 C operating temperature range are assured by design, characterization and Note 2: 0.6m F is the minimum required C capacitance for rated output FLY correlation with statistical process controls. current capability. Depending on the choice of capacitor material, a somewhat higher value of capacitor may be required to attain 0.6m F over Note 4: Based on long term current density limitations. temperature. 2 U WWW