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
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 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.
Documentation & Resources
R402 Reliability Data3/27/2018
Tools & Simulations
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.
Models for the following parts are available in LTspice:
LTC1874 Companion Parts
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|
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Buy Now Pricing
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