Features and Benefits
- Tight Load Regulation with Highly Resistive Cables without Requiring Remote Sense Wiring
- Compatible with Isolated and Nonisolated Power Supplies
- ±1% Internal Voltage Reference
- 5mA Sink Current Capability
- Soft-Correct Reduces Turn-On Transients
- Undervoltage and Overvoltage Protection
- Pin-Programmable Dither Frequency
- Optional Spread Spectrum Dither
- Wide VIN Range: 3.1V to 50V
- 24-Pin SSOP Package
The LT4180 solves the problem of providing tight load regulation over long, highly resistive cables without requiring an additional pair of remote sense wires. This Virtual Remote Sense™ device continuously interrogates the line impedance and corrects the power supply output voltage via its feedback loop to maintain a steady voltage at the load regardless of current changes.
The LT4180 is a full-featured controller with 5mA optoisolator sink capability, under/overvoltage lockout, soft-start and a ±1% internal voltage reference. The Virtual Remote Sense feature set includes user-programmable dither frequency and optional spread spectrum dither.
The LT4180 works with any topology and type of isolated or nonisolated power supply, including DC/DC converters and adjustable linear regulators.
The LT4180 is available in a 24-pin, SSOP package.
- 12V High Intensity Lamps
- 28V Industrial Systems
- High Power (>40 Watts) CAT5 Cable Systems
- Wiring Drop Cancellation for Notebook Computer Battery Charging
- AC and DC Adaptors
- Well-Logging and Other Remote Instrumentation
- Surveillance Equipment
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.
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.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
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Sample & Buy
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.