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Texas Instruments LMR34215-Q1 Synchronous Step-Down Converter

Texas Instruments LMR34215-Q1 Synchronous Step-Down Converter is an easy-to-use, synchronous, step-down DC/DC converter. With integrated high-side and low-side power MOSFETs, up to 1.5A output current is delivered over a wide input voltage range of 4.2V to 42V. The Texas Instruments LMR34215-Q1 uses peak-current-mode control for optimal efficiency and output voltage accuracy. Precision enable gives flexibility by enabling 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 accurately indicates system status, eliminating the requirement for an external supervisor.

Features

  • AEC-Q100-qualified for automotive applications
    • Temperature grade 1 of –40°C to +125°C, TA
  • Designed for automotive applications
    • Junction temperature range –40°C to +150°C
    • Protection features: thermal shutdown, input under-voltage lockout, cycle-by-cycle current limit, hiccup short-circuit protection
    • Spread-spectrum frequency modulation
    • HotRod™ package enables low EMI and minimized switch node ringing
    • 0.4V dropout with 1.5A load (typical)
    • ±1.5% reference voltage tolerance
    • 5V fixed-output, adjustable output voltage options
  • Suited for scalable power supplies
    • Pin compatible with
      • LMR36015/06-Q1 (60V, 0.6A or 1.5A)
      • LMR33620/30-Q1 (36V, 2A or 3A)
    • 400kHz, 2.1MHz frequency options
    • Integration reduces solution size and cost
      • Small, 2mm×3mm VQFN package with wettable flanks
      • Few external components
    • Low power dissipation across the load spectrum
      • 93% efficiency at 400kHz (12VIN, 5VOUT, 1A)
      • Increased light load efficiency in PFM
      • Low operating quiescent current of 24µA

Applications

  • ADAS camera module
  • Head-up display
  • Body control module
  • General-purpose wide VIN power supplies

Functional Block Diagram

Block Diagram - Texas Instruments LMR34215-Q1 Synchronous Step-Down Converter

Related Development Tool

Texas Instruments LMR34215FSC5EVM Evaluation Module

Evaluates the operation and performance of the LMR34215-Q1 wide-input buck regulator.

Learn Moreabout Texas Instruments LMR34215FSC5EVM Evaluation Module View Productsrelated to Texas Instruments LMR34215FSC5EVM Evaluation Module
Paskelbta: 2019-06-25 | Atnaujinta: 2023-09-26