Features and Benefits
- Adjustable/Selectable 3V, 3.3V or 5V Output Voltages
- 2V to 10V Input Voltage Range
- Up to 50mA Output Current
- Only Three External Capacitors Required
- Soft Start Limits Inrush Current at Turn-On
- Low Operating Current: 60µA
- Very Low Shutdown Current: < 1µA
- Shutdown Disconnects Load from VIN
- VOUT Programmable to 3V/5V or 3.3V/5V
- Short-Circuit and Overtemperature Protected
- 650kHz Switching Frequency
- Open-Drain Power-On Reset Output
- Available in SO-8 Package
The LTC1515, LTC1515-3/5 and LTC1515-3.3/5 are micropower switched capacitor DC/DC converters that produce a regulated output voltage by either stepping up or stepping down the input voltage. Output voltage is adjustable using an external resistor divider (LTC1515) or programmable to either 3V/5V (LTC1515-3/5) or 3.3V/5V (LTC1515-3.3/5) using a logic pin.
A unique architecture allows the parts to accommodate a wide input voltage range (2V to 10V) while maintaining ±4% regulation. Additional circuitry prevents excessive inrush current and output voltage ripple when large VIN to VOUT differentials are present.
An internal power-on reset circuit forces the POR pin low on initial power-up. The POR output remains low until 200ms (typ) after VOUT is in regulation.
The parts are short-circuit and over-temperature protected. Battery life is maximized by very low operating currents (ICC = 60µA typ, ICC<1µA in shutdown). All three parts are available in an SO-8 package.
- SIM Interface in GSM Cellular Telephones
- Smart Card Readers
- Local Power Supplies
- Portable Equipment
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.
Documentation & Resources
R368 Reliability Data3/22/2018
Battery-Powered Buck-Boost Converter Requires No Magnetics5/1/1998 LT Journal
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|
|LTC1515CS8#PBF||Material Declaration||Reliability Data||8-Lead SOIC (Narrow 0.15 Inch)|
|LTC1515CS8#TRPBF||Material Declaration||Reliability Data||8-Lead SOIC (Narrow 0.15 Inch)|
|LTC1515IS8#PBF||Material Declaration||Reliability Data||8-Lead SOIC (Narrow 0.15 Inch)|
|LTC1515IS8#TRPBF||Material Declaration||Reliability Data||8-Lead SOIC (Narrow 0.15 Inch)|
|Wafer Fabrication Data||R368 Reliability Data|
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