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LTC1502-3.3

Linear Technology
Part Number LTC1502-3.3
Manufacturer Linear Technology
Description Single Cell to 3.3V Regulated Charge Pump DC/DC Converter
Published Mar 27, 2005
Detailed Description 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 ...
Datasheet PDF File LTC1502-3.3 PDF File

LTC1502-3.3
LTC1502-3.3

Overview
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: 10mA (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 components 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 3.
5 C2 VOUT 7 C1+ C3 + LTC1502-3.
3 6 3 C1–/SHDN C3 – 4 5 GND VIN 10µF 1µF VIN SINGLE CELL NiCd or ALKALINE 1502-3.
3 TA01 VOUT = 3.
3V IOUT = 10mA 3.
4 OUTPUT VOLTAGE (V) 3.
3 IOUT = 10mA IOUT = 15mA 10µF 3.
2 3.
1 PCB LAYOUT FITS IN < 0.
125IN2 3.
0 0.
8 U Output Voltage vs Input Voltage TA = 25...


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