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Texas Instruments LM25137/LM25137F-Q1 Buck Controllers

Texas Instruments LM25137/LM25137F-Q1 Buck Controllers are dual-channel controllers for functional safety applications. These DC/DC controllers operate during an input voltage dip as low as 4V, at 100% duty cycle if needed. The LM25137/LM25137F-Q1 controllers use an interleaved, stackable, peak current-mode architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing. These controllers feature 150°C maximum junction temperature operation, user-selectable PFM mode for lower current consumption at light-load conditions, and configurable soft-start functions. The LM25137F-Q1 devices are AEC-Q100 qualified for automotive applications. These buck controllers come in a 6mm x 6mm thermally-enhanced, 36-pin VQFN package with additional pin clearance for increased reliability. The LM25137F-Q1 controllers are ideal for automotive electronic systems, infotainment systems, instrument clusters, ADAS, and body electronics and lighting.

Features

  • Functional safety-compliant
    • Developed for functional safety applications
      • Three orderable part numbers for Capable, ASIL B, and ASIL D options
    • Documentation available to aid ISO 26262 system design up to ASIL D
    • Systematic capability up to ASIL D
    • Hardware integrity up to ASIL D per IEC62380
  • Versatile dual synchronous buck DC/DC controller
    • 4V to 42V wide input voltage range
    • 1% accurate, fixed 3.3V, 5V, 12V, or adjustable outputs from 0.8V to 36V
    • Current monitor output for each channel
    • Charge-pump gate drivers for 100% duty cycle
    • No-load sleep current (non- switching) of 1.8µA (typical)
    • Internal hiccup-mode overcurrent protection
  • Two interleaved synchronous buck channels
    • Dual-channel or single-output multiphase
    • Stackable up to four phases
  • Designed for ultra-low EMI requirements
    • Dual Random Spread Spectrum (DRSS)
    • 100kHz to 2.64MHz switching frequency range
  • VQFN-36 package with wettable flanks

Applications

  • Personal electronics (computer peripherals)
  • Industrial (24V bus systems, power delivery)
  • Enterprise systems (high-performance computing)
  • Automotive electronic systems (LM25137F-Q1)
  • Infotainment systems, instrument clusters, and ADAS (LM25137F-Q1)
  • Body electronics and lighting (LM25137F-Q1)

Datasheets

Schematic

Schematic - Texas Instruments LM25137/LM25137F-Q1 Buck Controllers
Published: 2025-12-31 | Updated: 2026-01-23