LTC1503
LTC1503
PRODUCTIONHigh Efficiency Inductorless Step-Down DC/DC Converter
- Part Models
- 11
- 1ku List Price
- Starting From $3.14
Viewing:
Overview
- Input Voltage Range: 2.4V to 6V
- Fixed Output Voltages: 1.8V ±4%, 2V ±4%
- Output Current: Up to 100mA
- No Inductors
- Typical Efficiency 25% Higher than LDOs
- Low Operating Current: 25µA
- Low Shutdown Current: 5µA
- 600kHz Switching Frequency
- Shutdown Disconnects Load from VIN
- Soft-Start Limits Inrush Current at Turn-On
- Short-Circuit and Overtemperature Protected
- Available in 8-Pin MSOP and SO Packages
The LTC1503-1.8/LTC1503-2 are switched capacitor step-down DC/DC converters that produce a regulated output from a 2.4V to 6V input. The parts use switched capacitor fractional conversion to achieve high efficiency over the entire input range. No inductors are required. Internal circuitry controls the step-down conversion ratio to optimize efficiency as the input voltage and load conditions vary. Typical efficiency is 25% higher than that of a low dropout (LDO) linear regulator.
Regulation is achieved by sensing the output voltage and enabling the internal switching network as needed to maintain a fixed output voltage. This method of regulation enables the parts to achieve high efficiency at extremely light loads. Low operating current (25µA with no load, 5µA in shutdown) and low external parts count (two 1µF flying capacitors and two 10µF bypass capacitors) make the LTC1503-1.8/LTC1503-2 ideally suited for space constrained battery-powered applications. The parts are fully short-circuit and over temperature protected.
The LTC1503-1.8/LTC1503-2 are available in 8-pin MSOP and SO packages.
Applications
- Cellular Phones
- Handheld Computers
- Smart Card Readers
- Low Power DSP Supplies
- Portable Electronic Equipment
- Handheld Medical Instruments
Documentation
Data Sheet 1
User Guide 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 |
|---|---|---|---|
| LTC1503CMS8-1.8#PBF | 8-Lead MSOP | ||
| LTC1503CMS8-1.8#TRPBF | 8-Lead MSOP | ||
| LTC1503CMS8-2#PBF | 8-Lead MSOP | ||
| LTC1503CS8-1.8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1503CS8-1.8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1503CS8-2#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1503CS8-2#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1503IS8-1.8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1503IS8-1.8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1503IS8-2#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1503IS8-2#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LTC1503CMS8-1.8#PBF | PRODUCTION | |
| LTC1503CMS8-1.8#TRPBF | PRODUCTION | |
| LTC1503CMS8-2#PBF | PRODUCTION | |
|
Jun 5, 2024 - 24_0004 Epoxy Change from Henkel 8290 to 8290A for MSOP (3) |
||
| LTC1503CMS8-1.8#PBF | PRODUCTION | |
| LTC1503CMS8-1.8#TRPBF | PRODUCTION | |
| LTC1503CMS8-2#PBF | PRODUCTION | |
|
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC1503CMS8-1.8#PBF | PRODUCTION | |
| LTC1503CMS8-1.8#TRPBF | PRODUCTION | |
| LTC1503CMS8-2#PBF | PRODUCTION | |
|
Dec 14, 2023 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LTC1503CS8-1.8#PBF | PRODUCTION | |
| LTC1503CS8-1.8#TRPBF | PRODUCTION | |
| LTC1503CS8-2#PBF | PRODUCTION | |
| LTC1503CS8-2#TRPBF | PRODUCTION | |
| LTC1503IS8-1.8#PBF | PRODUCTION | |
| LTC1503IS8-1.8#TRPBF | PRODUCTION | |
| LTC1503IS8-2#PBF | PRODUCTION | |
| LTC1503IS8-2#TRPBF | PRODUCTION | |
|
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LTC1503CS8-1.8#PBF | PRODUCTION | |
| LTC1503CS8-1.8#TRPBF | PRODUCTION | |
| LTC1503CS8-2#PBF | PRODUCTION | |
| LTC1503CS8-2#TRPBF | PRODUCTION | |
| LTC1503IS8-1.8#PBF | PRODUCTION | |
| LTC1503IS8-1.8#TRPBF | PRODUCTION | |
| LTC1503IS8-2#PBF | PRODUCTION | |
| LTC1503IS8-2#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareTools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC1503-1.8
- LTC1503-2
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.
Evaluation Kits
Latest Discussions
No discussions on LTC1503 yet. Have something to say?
Start a Discussion on EngineerZone®