LTC1515
LTC1515
PRODUCTIONStep-Up/Step-Down Switched Capacitor DC/DC Converters with RESET
- Part Models
- 4
- 1ku List Price
- Starting From $6.38
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Overview
- 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.
Applications
- SIM Interface in GSM Cellular Telephones
- Smart Card Readers
- Local Power Supplies
- Portable Equipment
Documentation
Data Sheet 1
Application Note 1
Design Note 1
Technical Articles 1
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC1515CS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1515CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1515IS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1515IS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LTC1515CS8#PBF | PRODUCTION | |
| LTC1515CS8#TRPBF | PRODUCTION | |
| LTC1515IS8#PBF | PRODUCTION | |
| LTC1515IS8#TRPBF | PRODUCTION | |
|
Oct 12, 2022 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LTC1515CS8#PBF | PRODUCTION | |
| LTC1515CS8#TRPBF | PRODUCTION | |
| LTC1515IS8#PBF | PRODUCTION | |
| LTC1515IS8#TRPBF | PRODUCTION | |
|
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LTC1515CS8#PBF | PRODUCTION | |
| LTC1515CS8#TRPBF | PRODUCTION | |
| LTC1515IS8#PBF | PRODUCTION | |
| LTC1515IS8#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LTC1515
- LTC1515-3
- LTC1515-3.3
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.