LTC1514
Step-Up/Step-Down Switched Capacitor DC/DC Converters with Low-Battery Comparator
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Overview
Features and Benefits
- 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
- Low Shutdown Current: 10µA
- Shutdown Disconnects Load from VIN
- Short-Circuit and Overtemperature Protected
- 650kHz Switching Frequency
- Low-Battery Comparator Active in Shutdown
- Available in SO-8 Package
Product Details
The LTC1514-3.3/LTC1514-5 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 fixed at either 3.3V (LTC1514-3.3) or 5V (LTC1514-5) by an internal resistor divider.
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 uncommitted comparator is kept active in shutdown. The comparator has an open-drain output for flexible interfacing.
The parts are short-circuit and overtemperature protected. Battery life is maximized by very low operating currents (ICC= 60µA typ, 10µA in shutdown). Both parts are available in an SO-8 package.
Applications
- Battery Operated Equipment
- Smart Card Readers
- Local Power Supplies
- Handheld Instruments
- Battery Backup Supplies
Product Categories
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
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
LTC1514-3.3
LTC1514-5
Design Resources
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 |
|---|---|---|---|---|
| LTC1514CS8-3.3#PBF | Material Declaration | Reliability Data | 8-Lead SOIC (Narrow 0.15 Inch) | |
| LTC1514CS8-3.3#TRPBF | Material Declaration | Reliability Data | 8-Lead SOIC (Narrow 0.15 Inch) | |
| LTC1514CS8-5#PBF | Material Declaration | Reliability Data | 8-Lead SOIC (Narrow 0.15 Inch) | |
| LTC1514CS8-5#TRPBF | Material Declaration | Reliability Data | 8-Lead SOIC (Narrow 0.15 Inch) | |
| LTC1514IS8-3.3#PBF | Material Declaration | Reliability Data | 8-Lead SOIC (Narrow 0.15 Inch) | |
| LTC1514IS8-3.3#TRPBF | Material Declaration | Reliability Data | 8-Lead SOIC (Narrow 0.15 Inch) | |
| LTC1514IS8-5#PBF | Material Declaration | Reliability Data | 8-Lead SOIC (Narrow 0.15 Inch) | |
| LTC1514IS8-5#TRPBF | Material Declaration | Reliability Data | 8-Lead SOIC (Narrow 0.15 Inch) | |
| Wafer Fabrication Data | R368 Reliability Data |
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Buy Now Pricing
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List Pricing
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Lead Times
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