Features and Benefits
- High Voltage: Operation Up to 60V
- High Current: Dual N-Channel Synchronous Drive Handles Up to 10,000pF Gate Capacitance
- Programmable Average Load Current Limiting
- 5V Reference Output with 10mA External Loading Capability
- Programmable Fixed Frequency Synchronizable Current Mode Operation Up to 150kHz
- Undervoltage Lockout with Hysteresis
- Programmable Start Inhibit for Power Supply Sequencing and Protection
- Adaptive Nonoverlapping Gate Drive Prevents Shoot-Through
The LT1339 is a high power synchronous current mode switching regulator controller. The IC drives dual N-channel MOSFETs to create a single IC solution for high power DC/DC converters in applications up to 60V.
The LT1339 incorporates programmable average current limiting, allowing accurate limiting of DC load current independent of inductor ripple current. The IC also incorporates user-adjustable slope compensation for minimization of magnetics at duty cycles up to 90%.
The LT1339 timing oscillator operating frequency is programmable and can be synchronized up to 150kHz. Minimum off-time operation provides main switch protection. The IC also incorporates a soft start feature that is gated by both shutdown and undervoltage lockout conditions.
An output phase reversal pin allows flexibility in configuration of converter types, including inverting and negative topologies.
- 48V Telecom Power Supplies
- Personal Computers and Peripherals
- Distributed Power Converters
- Industrial Control Systems
- Lead-Acid Battery Backup Systems
- Automotive and Heavy 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.
Evaluation Kits (7)
Demo Board DC259A provides an isolated 3.3V or 5VOUT at 10A from a 36 to 72VDC source. The DC259A includes the following products:
LT1431 - Programmable Reference
LT1339 - High Power Synchronous DC/DC Controller
LTC1693 - High Speed Single/Dual N-Channel MOSFET Drivers
Demonstration circuit DC224A is a multipurpose, 3 amp synchronous step-down switching regulator using the LT1339. The input voltage range is 4.5V to 60V. The output voltage is jumper selectable for 3.3V, 5V, 7V or 12V. The board includes a small SEPIC converter based on the LT1082 that provides 12V for the LT1339 with any input voltage of 4V to 60V.
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.
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.