Features and Benefits
- 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 LTC1502-3.3 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 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.
- Battery Backup Supplies
- Portable Electronic Equipment
- Handheld Medical Instruments
- Glucose Meters
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
DC239A: Demo Board for the LTC1502-3.3 Single Cell to 3.3V Regulated Charge Pump DC/DC Converter.
Documentation & Resources
R402 Reliability Data3/27/2018111 K
DC239A - Demo Manual9/24/2009100K
Tools & Simulations
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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LTC1502CMS8-3.3#PBF||Material Declaration||Reliability Data||8-Lead MSOP|
|LTC1502CMS8-3.3#TRPBF||Material Declaration||Reliability Data||8-Lead MSOP|
|LTC1502CS8-3.3#PBF||Material Declaration||Reliability Data||8-Lead SOIC (Narrow 0.15 Inch)|
|LTC1502CS8-3.3#TRPBF||Material Declaration||Reliability Data||8-Lead SOIC (Narrow 0.15 Inch)|
|LTC1502IS8-3.3#PBF||Material Declaration||Reliability Data||8-Lead SOIC (Narrow 0.15 Inch)|
|LTC1502IS8-3.3#TRPBF||Material Declaration||Reliability Data||8-Lead SOIC (Narrow 0.15 Inch)|
|Wafer Fabrication Data||R402 Reliability Data|
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.