LTC1474
Info: : PRODUCTION
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LTC1474

Low Quiescent Current High Efficiency Step-Down Converters

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 18
1ku List Price Starting From $4.90
Features
  • High Efficiency: Over 92% Possible
  • Very Low Standby Current: 10µA Typ
  • Available in Space Saving 8-Lead MSOP Package
  • Internal 1.4Ω Power Switch (VIN = 10V)
  • Wide VIN Range: 3V to 18V Operation
  • Very Low Dropout Operation: 100% Duty Cycle
  • Low-Battery Detector Functional During Shutdown
  • Programmable Current Limit with Optional Current Sense Resistor (10mA to 400mA Typ)
  • Short-Circuit Protection
  • Few External Components Required
  • Active Low Micropower Shutdown: IQ = 6µA Typ
  • Pushbutton On/Off (LTC1475 Only)
  • 3.3V, 5V and Adjustable Output Versions
Additional Details
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The LTC1474/LTC1475 series are high efficiency step-down converters with internal P-channel MOSFET power switches that draw only 10µA typical DC supply current at no load while maintaining output voltage. The LTC1474 uses logic-controlled shutdown while the LTC1475 features pushbutton on/off.

The low supply current coupled with Burst Mode operation enables the LTC1474/LTC1475 to maintain high efficiency over a wide range of loads. These features, along with their capability of 100% duty cycle for low dropout and wide input supply range, make the LTC1474/LTC1475 ideal for moderate current (up to 300mA) battery-powered applications.

The peak switch current is user-programmable with an optional sense resistor (defaults to 325mA minimum if not used) providing a simple means for optimizing the design for lower current applications. The peak current control also provides short-circuit protection and excellent startup behavior. A low-battery detector that remains functional in shutdown is provided .

The LTC1474/LTC1475 series availability in 8-lead MSOP and SO packages and need for few additional components provide for a minimum area solution.

Applications

  • Cellular Telephones and Wireless Modems
  • 4mA to 20mA Current Loop Step-Down Converter
  • Portable Instruments
  • Battery-Operated Digital Devices
  • Battery Chargers
  • Inverting Converters
  • Intrinsic Safety Applications
Part Models 18
1ku List Price Starting From $4.90

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Feb 3, 2020

- 20_0128

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LTC1474CMS8#PBF

PRODUCTION

LTC1474CMS8#TRPBF

PRODUCTION

LTC1474CMS8-3.3#PBF

PRODUCTION

LTC1474CMS8-3.3#TRPBF

PRODUCTION

LTC1474CMS8-5#PBF

PRODUCTION

LTC1474CMS8-5#TRPBF

PRODUCTION

Dec 14, 2023

- 22_0255

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

LTC1474CS8#PBF

PRODUCTION

LTC1474CS8#TRPBF

PRODUCTION

LTC1474CS8-3.3#PBF

PRODUCTION

LTC1474CS8-3.3#TRPBF

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LTC1474CS8-5#PBF

PRODUCTION

LTC1474CS8-5#TRPBF

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LTC1474IS8-3.3#PBF

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LTC1474IS8-3.3#TRPBF

PRODUCTION

LTC1474IS8-5#PBF

PRODUCTION

LTC1474IS8-5#TRPBF

PRODUCTION

Jun 16, 2021

- 21_0026

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LTC1474CS8#PBF

PRODUCTION

LTC1474CS8#TRPBF

PRODUCTION

LTC1474CS8-3.3#PBF

PRODUCTION

LTC1474CS8-3.3#TRPBF

PRODUCTION

LTC1474CS8-5#PBF

PRODUCTION

LTC1474CS8-5#TRPBF

PRODUCTION

LTC1474IS8#PBF

PRODUCTION

LTC1474IS8#TRPBF

PRODUCTION

LTC1474IS8-3.3#PBF

PRODUCTION

LTC1474IS8-3.3#TRPBF

PRODUCTION

LTC1474IS8-5#PBF

PRODUCTION

LTC1474IS8-5#TRPBF

PRODUCTION

Oct 12, 2022

- 22_0255

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

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Part Models

Product Lifecycle

PCN

Feb 3, 2020

- 20_0128

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Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LTC1474CMS8#PBF

PRODUCTION

LTC1474CMS8#TRPBF

PRODUCTION

LTC1474CMS8-3.3#PBF

PRODUCTION

LTC1474CMS8-3.3#TRPBF

PRODUCTION

LTC1474CMS8-5#PBF

PRODUCTION

LTC1474CMS8-5#TRPBF

PRODUCTION

Dec 14, 2023

- 22_0255

arrow down

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

LTC1474CS8#PBF

PRODUCTION

LTC1474CS8#TRPBF

PRODUCTION

LTC1474CS8-3.3#PBF

PRODUCTION

LTC1474CS8-3.3#TRPBF

PRODUCTION

LTC1474CS8-5#PBF

PRODUCTION

LTC1474CS8-5#TRPBF

PRODUCTION

LTC1474IS8-3.3#PBF

PRODUCTION

LTC1474IS8-3.3#TRPBF

PRODUCTION

LTC1474IS8-5#PBF

PRODUCTION

LTC1474IS8-5#TRPBF

PRODUCTION

Jun 16, 2021

- 21_0026

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Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LTC1474CS8#PBF

PRODUCTION

LTC1474CS8#TRPBF

PRODUCTION

LTC1474CS8-3.3#PBF

PRODUCTION

LTC1474CS8-3.3#TRPBF

PRODUCTION

LTC1474CS8-5#PBF

PRODUCTION

LTC1474CS8-5#TRPBF

PRODUCTION

LTC1474IS8#PBF

PRODUCTION

LTC1474IS8#TRPBF

PRODUCTION

LTC1474IS8-3.3#PBF

PRODUCTION

LTC1474IS8-3.3#TRPBF

PRODUCTION

LTC1474IS8-5#PBF

PRODUCTION

LTC1474IS8-5#TRPBF

PRODUCTION

Oct 12, 2022

- 22_0255

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Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

DC143A-C

LTC1474CMS8-5 | Low Q-Current High Efficiency Switching Regulator, 5V Fixed @ 300mA

DC143A-A

LTC1474CMS8 | Low Q-Current High Efficiency Switching Regulator, 3.3V Adjustable @ 300mA

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.

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