LMR33640

• Functional Safety-Capable
  • Documentation available to aid functional safety system design
• Configured for rugged industrial applications
  • Input voltage range: 3.8 V to 36 V
  • Output voltage range: 1 V to 24 V
  • Peak-current mode control
  • Junction temperature range: –40°C to +125°C
  • Ease-of-use SOIC package
• Well-suited for scalable industrial power supplies
  • Pin compatible with:
    • LMR33610, LMR33620, and LMR33630 (36 V, 1 A, 2 A, or 3 A)
    • LMR36510 and LMR36520 (65 V, 1 A, or 2 A)
  • 400-kHz and 1-MHz frequency
  • Integrated compensation helps reduce solution size, cost, and design complexity
• High-efficiency solution
  • Peak efficiency > 95%
  • Low shutdown quiescent current of 5 µA
  • Low operating quiescent current of 24 µA
• Flexible system interface
  • Power-good flag and precision enable
• Create a custom design using the LMR33640 with the WEBENCH Power Designer
• Use TPSM53604 module for faster time to market

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The LMR33640 SIMPLE SWITCHER regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged industrial applications. The LMR33640 drives up to 4 A of load current from an input of up to 36 V. The LMR33640 provides high light-load efficiency and output accuracy. Features such as a power-good flag and precision enable provide both flexible and easy-to-use solutions for a wide range of applications. The LMR33640 automatically folds back frequency at light load to improve efficiency. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. Integration and internal compensation eliminates many external components and provides a pinout designed for a simple PCB layout. The feature set of the device is designed to simplify implementation for a wide range of end equipment. The LMR33640 is pin-to-pin compatible with the LMR33610, LMR33620, LMR33630 (36 V, 1 A/2, A/3 A), LMR36510 (65 V, 1 A), and LMR36520 (65 V, 2 A), completing the family of scalable SIMPLE SWITCHER power supplies. This minimizes the cost and effort associated with board layout modifications. The LMR33640 is available in an 8-pin HSOIC package.