LTC1503
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LTC1503

High Efficiency Inductorless Step-Down DC/DC Converter

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LTspice LTC1503 - Inductorless (Charge Pump) DC/DC Converters Download 1.18 KB
Part Models 11
1ku List Price Starting From $2.48
Features
  • 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
Additional Details
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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
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file View Data Sheet
Documentation View All Documentation
LTspice LTC1503 - Inductorless (Charge Pump) DC/DC Converters Download 1.18 KB
Part Models 11
1ku List Price Starting From $2.48
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LTC1503

Documentation

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Data Sheet

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UPDATED 01/30/2010
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LTC1503: High Efficiency Inductorless Step-Down DC/DC Converter Data Sheet

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UPDATED 05/29/2005
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LTC1503: 高効率インダクタ不要 降圧DC/DCコンバータ データシート

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Reliability Data

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UPDATED 03/27/2018
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User Guide

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UPDATED 09/24/2009
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Documentation

Documentation

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 external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC1503CMS8-1.8#TRPBF 8-Lead MSOP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC1503CMS8-2#PBF 8-Lead MSOP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC1503CS8-1.8#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC1503CS8-1.8#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC1503CS8-2#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LTC1503CS8-2#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC1503IS8-1.8#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC1503IS8-1.8#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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LTC1503IS8-2#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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LTC1503IS8-2#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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Product Lifecycle

PCN

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

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PCN24_0004_Form

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Material_Report

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Qualification Results Summary

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Delta Qualification Matrix

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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

pdf

PCN20_0128_Form

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xls

Material_Report

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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

pdf

PCN22_0255_Form

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xls

Material_Report

Download

pdf

Qualification Results Summary

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xlsm

Delta Qualification Matrix

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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

pdf

PCN21_0026_Form

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xls

Material_Report

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xlsm

Delta Qualification Matrix

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Product Lifecycle

PCN

Jun 5, 2024

- 24_0004

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP (3)

LTC1503CMS8-1.8#PBF

PRODUCTION

LTC1503CMS8-1.8#TRPBF

PRODUCTION

LTC1503CMS8-2#PBF

PRODUCTION

pdf

PCN24_0004_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

Download
Feb 3, 2020

- 20_0128

arrow down

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

pdf

PCN20_0128_Form

external-icon

xls

Material_Report

Download
Dec 14, 2023

- 22_0255

arrow down

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

pdf

PCN22_0255_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

Download
Jun 16, 2021

- 21_0026

arrow down

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

pdf

PCN21_0026_Form

external-icon

xls

Material_Report

Download

xlsm

Delta Qualification Matrix

Download
Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC250A-B

LTC1503CMS8-1.8 | High Efficiency Inductorless Step-Down DC/DC Converter, 2.4 to 6VIN, 1.8VOUT @ 100mA

reference details image

DC250A-A

LTC1503CMS8-2 | High Efficiency Inductorless Step-Down DC/DC Converter, 2.4 to 6VIN, 2VOUT @ 100mA

Evaluation Kits2

evaluation kit item images

DC250A-B

LTC1503CMS8-1.8 | High Efficiency Inductorless Step-Down DC/DC Converter, 2.4 to 6VIN, 1.8VOUT @ 100mA
evaluation kit item images

DC250A-A

LTC1503CMS8-2 | High Efficiency Inductorless Step-Down DC/DC Converter, 2.4 to 6VIN, 2VOUT @ 100mA
Tools & Simulations

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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LTC1503 - Inductorless (Charge Pump) DC/DC Converters Download

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