1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. External Power Switch Buck Controllers
  6. LTC1874


Features and Benefits

  • High Efficiency: Up to 94%
  • High Output Currents Easily Achieved
  • Wide VIN Range: 2.5V to 9.8V
  • Constant Frequency 550kHz Operation
  • Burst Mode Operation at Light Load
  • Low Dropout: 100% Duty Cycle
  • 0.8V Reference Allows Low Output Voltages
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Low Quiescent Current: 270µA (Each Controller)
  • Separate Shutdown Pin for Each Controller
  • Shutdown Mode Draws Only 8µA Supply Current (Each Controller)
  • ±2.5% Reference Accuracy
  • Available in 16-Lead Narrow SSOP
  • Each Controller Functions Independent of the Other

Product Details

The LTC1874 is a dual constant frequency current mode step-down DC/DC controller with excellent AC and DC load and line regulation. Each controller has an accurate undervoltage lockout that shuts down the individual controller when the input voltage falls below 2.0V.

The LTC1874 boasts ±2.5% output voltage accuracy and consumes only 270µA of quiescent current per controller. The LTC1874 is configured with Burst Mode operation, which enhances efficiency at low output current for applications where efficiency is a prime consideration.

To further maximize the life of a battery source, each external P-channel MOSFET is turned on continuously in dropout (100% duty cycle). In shutdown, each controller draws a mere 8µA. High constant operating frequency of 550kHz allows the use of small external inductors.

The LTC1874 is available in a small footprint 16-lead narrow SSOP.


  • 1- or 2-Cell Lithium-Ion-Powered Applications
  • Distributed 3.3V, 2.5V or 1.8V Power Systems
  • Personal Information Appliances
  • Portable Computers

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.

Tools & Simulations


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Product Recommendations

LTC1874 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.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC1874EGN#PBF Material Declaration Reliability Data 16-Lead SSOP (Narrow 0.15 Inch)
LTC1874EGN#TRPBF Material Declaration Reliability Data 16-Lead SSOP (Narrow 0.15 Inch)
Wafer Fabrication Data R402 Reliability Data

PCN-PDN Information

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Sample & Buy

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Buy Now Pricing

(**) Displayed Buy Now Price and Price Range is based on small quantity orders.


List Pricing

(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Lead Times

Please see the latest communication from our CCO regarding lead times.



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