Features and Benefits
- Wide Input Range: 4V to 60V
- Current Mode Constant Frequency PWM
- Very Low Dropout Operation: 100% Duty Cycle
- Programmable Switching Frequency: 200kHz to 600kHz
- Selectable High Efficient Burst Mode® Operation: 40µA Quiescent Current
- Easy Synchronization
- 8V, 2A Gate Drive (VCC > 10V) for Industrial High Voltage P-Channel MOSFET
- Programmable Soft-Start
- Programmable Current Limit
- Available in a Small 10-Pin Thermally Enhanced MSE Package
The LTC3824 is a step-down DC/DC controller designed to drive an external P-channel MOSFET. With a wide input range of 4V to 60V and a high voltage gate driver, the LTC3824 is suitable for many industrial and automotive high power applications. Constant frequency current mode operation provides excellent performance.
The LTC3824 can be configured for Burst Mode operation. Burst Mode operation enhances low current efficiency (only 40µA quiescent current) and extends battery run time. The switching frequency can be programmed up to 600kHz and is easily synchronizable.
Other features include current limit, soft-start, micropower shutdown, and Burst Mode disable.
The LTC3824 is available in a 10-lead MSE power package.
- Industrial and Automotive Power Supplies
- Telecom Power Supplies
- Distributed Power Systems
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.
Evaluation Kits (1)
Demonstration circuit 960 is a high voltage, current-mode DC/DC step-down controller featuring the LTC3824 in a small 10-pin MSOP package.
The board operates from an input voltage of 5.5V to 60V and outputs 5V @ 2A. The converter uses a P-channel MOSFET for the main switch resulting in a low parts count design. Operating frequency is set to 200kHz with the option to accept a synchronized external clock.
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:
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.
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.