Texas Instruments LMR36520 SIMPLE SWITCHER® Step-Down Converters
Texas Instruments LMR36520 SIMPLE SWITCHER® Step-Down Converters offer integrated high-side and low-side power MOSFETs, with output current up to 2A delivered over a wide input voltage range of 4.2V to 65V. The transient tolerance up to 70V reduces the solution size and cost to protect against overvoltages and meets the surge immunity requirements of IEC 61000-4-5.
The LMR36520 uses peak-current mode control for optimal efficiency and output voltage accuracy. Precision enable gives flexibility by allowing a direct connection to the wide input voltage or precise control over device start-up and shutdown. With built-in filtering and delay, the power-good flag offers a true indication of system status, eliminating the requirement for an external supervisor.
Integration and internal compensation exclude the need for many external components and provide a pinout designed for a simple PCB layout. The device's feature set is designed to simplify implementation for a wide range of end equipment.
The LMR36520 is pin-to-pin compatible with the LMR36510 (65V, 1A) and LMR33610, LMR33620, LMR33630, and LMR33640 (36V, 1A/2A/3A/4A), completing the current family of SIMPLE SWITCHER converters. This feature increases the ease of use and scalability of wide VIN converters across various commonly used voltage and current ratings without redesigning the board layout. As a result, the overall cost, design effort, and time to market are optimized.
The Texas Instruments LMR36520 is available in an 8-pin HSOIC package.
Features
- Designed for reliable and rugged applications
- Input transient protection up to 70V
- Protection features: thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, hiccup short-circuit protection
- Well-suited for scalable industrial power supplies
- Pin compatible with
- LMR36510 (65V, 1A)
- LMR33610/LMR33620/LMR33630/LMR33640 (36V, 1A, 2A, 3A, or 4A)
- Internal compensation helps reduce solution size, cost, and design complexity
- 400kHz frequency
- Pin compatible with
- Wide conversion range
- Input voltage range: 4.2V to 65V
- Output voltage range: 1V to 95% of VIN
- Low-power dissipation across the load spectrum
- 90% efficiency: 24VIN, 5VOUT, 1 A at 400kHz
- Increased light-load efficiency in PFM mode
- Low operating quiescent current of 26µA
- Power-good output with filter and delayed release
Applications
- IP network cameras
- Analog security cameras
- HVAC valve and actuator control
- AC drive and servo drive control modules
- Analog input modules and mixed IO modules
- General-purpose wide VIN power supply
Functional Diagram
Related Development Tool
Texas Instruments LMR36520AEVM Converter Evaluation Module (EVM)
Evaluates the LMR36520, a family of easy-to-use synchronous step-down DC/DC converters.