Features and Benefits
- VIN and VOUT Limited Only by External Components
- Internal or Programmable External Soft-Start
- Constant Frequency 200kHz Operation
- Adjustable Current Limit
- Current Sense Resistor Optional
- ±1.5% Voltage Reference Accuracy
- Current Mode Operation for Excellent Line and Load Transient Response
- 4.1V Undervoltage Threshold for Logic Level
- Low Quiescent Current: 300µA
- Low Profile (1mm) ThinSOT™ and (0.75mm) 2mm × 3mm DFN Package
The LTC3873-5 is a constant frequency current mode controller for boost, flyback or SEPIC DC/DC converters designed to drive an N-channel MOSFET for high input and output voltage converter applications.
The LTC3873-5 provides ±1.5% output voltage accuracy and consumes only 300μA quiescent current during normal operation and only 50μA during micropower start-up. Using a 9.3V internal shunt regulator, the LTC3873-5 can be powered from a high input voltage through a resistor or it can be powered directly from a low impedance DC voltage of 9V or less. Soft-start can be programmed using an external capacitor.
The LTC3873-5 is available in 8-lead ThinSOT and 2mm × 3mm DFN packages.
- Telecom Power Supplies
- Automotive Power Supplies
- PoE Applications
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
R421 Reliability Data3/23/2018
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:
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|
|LTC3873EDDB-5#TRMPBF||Material Declaration||Reliability Data||8-Lead DFN (3mm x 2mm w/ EP)|
|LTC3873EDDB-5#TRPBF||Material Declaration||Reliability Data||8-Lead DFN (3mm x 2mm w/ EP)|
|LTC3873ETS8-5#TRMPBF||Material Declaration||Reliability Data||8-Lead SOT-23|
|LTC3873ETS8-5#TRPBF||Material Declaration||Reliability Data||8-Lead SOT-23|
|LTC3873IDDB-5#TRMPBF||Material Declaration||Reliability Data||8-Lead DFN (3mm x 2mm w/ EP)|
|LTC3873IDDB-5#TRPBF||Material Declaration||Reliability Data||8-Lead DFN (3mm x 2mm w/ EP)|
|LTC3873ITS8-5#TRMPBF||Material Declaration||Reliability Data||8-Lead SOT-23|
|LTC3873ITS8-5#TRPBF||Material Declaration||Reliability Data||8-Lead SOT-23|
|Wafer Fabrication Data||R421 Reliability Data|
Sample & Buy
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Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
(*)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.
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