Overview

Features and Benefits

  • High Efficiency: Up to 94%
  • Peak Inductor Current Independent of Inductor Value
  • Short-Circuit Protection
  • Optimized for 5V to –5V Applications
  • Wide VIN Range: 4V to 18.5V
  • Low Dropout Operation
  • Low-Battery Detector
  • Pin Selectable Current Limit
  • Internal 0.9Ω Power Switch: VIN = 9V
  • Only Four External Components Required
  • 130µA Standby Current
  • Active Low Micropower Shutdown

Product Details

The LTC1174 is a simple current mode DC/DC converter ideally suited for 9V to 5V, 5V to 3.3V or 5V to –5V operation. With an internal 0.9Ω switch (at a supply voltage of 9V), the LTC1174 requires only four external components to construct a complete high efficiency DC/DC converter.

Under a no load condition the LTC1174 draws only 130μA. In shutdown, it draws a mere 1μA making this converter ideal for current sensitive applications. In dropout, the internal P-channel MOSFET switch is turned on continuously allowing the user to maximize the life of the battery source.

The maximum inductor current of the LTC1174 family is pin selectable to either 340mA or 600mA, optimizing efficiency for a wide range of applications. Operation up to 200kHz permits the use of small surface mount inductors and capacitors.

For applications requiring higher output current or ultrahigh efficiency, see the LTC1148 data sheet.

Applications

  • Distributed Power Systems
  • Step-Down Converters
  • Inverting Converters
  • Memory Backup Supply
  • Portable Instruments
  • Battery-Powered Equipment

Product Lifecycle icon-recommended 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.

Evaluation Kits (3)

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.

LTspice

Models for the following parts are available in LTspice:

LTC1174
LTC1174-3
LTC1174-3.3
LTC1174-5
LTC1174HV
LTC1174HV-3
LTC1174HV-3.3
LTC1174HV-5

Product Recommendations

LTC1174 Companion Parts

Recommended Related Parts

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.

Discussions

LTC1174 Discussions

RE: +-5 from single +5
5 day(s) ago in Power By Linear
LTC1174 Didn't find what you were looking for? Ask the Analog community »

Sample & Buy

Sample & Buy functionality exists in desktop site
Back
Check Inventory


The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Price Table Help

 

Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.