LTC1502-3.3 Datasheet | Linear Technology

LTC1502-3.3 Single Cell to 3.3V Regulated Charge Pump DC/DC Converter Features s s s s s s s s s s s DESCRIPTIO Input Voltage Range: 0.9V to 1.8V 0.9V Guaranteed Start-Up Voltage Regulated Output Voltage: 3.3V ± 4% Output Current: 10m A (VIN ≥ 1V) No Inductors Shutdown Disconnects Load from VIN Low Operating Current: 40µA Low Shutdown Current: 5µA Short-Circuit and Overtemperature Protected Application Circuit Fits in < 0.125in2 PCB Area Available in 8-Pin MSOP and SO Packages The LTC®1502-3.3 is a quadrupler charge pump DC/DC converter that produces a regulated 3.3V output from a single alkaline cell input. It requires only five small external capacitors- no inductors are required. Low supply current (40µA typical, 5µA in shutdown) and minimal external ponents make the LTC1502-3.3 ideal for space and power conscious single-cell applications. The total printed circuit board area of the circuit shown below is less than 0.125in2. Forcing the C1 - /SHDN pin low through an external resistive pull-down puts the part into shutdown mode. During shutdown, the internal oscillator is stopped and the load is disconnected from VIN. An internal pull-up current on the C1 - /SHDN pin forces the part back into normal operation once the pull-down resistance is removed. The LTC1502-3.3 is short-circuit protected and survives an indefinite VOUT short to ground. The LTC1502-3.3 is available in 8-pin MSOP and SO packages. , LTC and LT are registered trademarks of Linear Technology Corporation. U APPLICATIO S s s s s s Pagers Battery Backup Supplies Portable Electronic Equipment Handheld Medical Instruments Glucose Meters TYPICAL APPLICATIO 1 10µF 1µF 2 8 Single Cell to 3.3V DC/DC Converter C2 VOUT 7 C1+ C3 + LTC1502-3.3 6 3 C1- /SHDN C3 - 4 5 GND VIN 10µF 1µF VIN SINGLE CELL Ni Cd or ALKALINE 1502-3.3 TA01 VOUT = 3.3V IOUT = 10m A OUTPUT VOLTAGE (V) 3.3 IOUT = 10m A IOUT = 15m A 10µF PCB LAYOUT FITS IN < 0.125IN2 3.0 0.8 Output Voltage vs Input Voltage TA =...