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LMR34206FSC3RNXRQ1

4.2-V to 42-V, 0.6-A ultra-small synchronous step-down converter

LMR34206FSC3RNXRQ1 Allgemeine Beschreibung

The LMR34206-Q1 regulator is an easy-to-use, synchronous, step-down DC/DC converter. With integrated high-side and low-side power MOSFETs, up to of output current is delivered over a wide input voltage range of 4.2 V to 42 V.

The LMR34206-Q1 uses peak-current-mode control to provide 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. The power-good flag, with built-in filtering and delay, offers a true indication of system status eliminating the requirement for an external supervisor.

The LMR34206-Q1 is in a HotRod™ package which enables low EMI, higher efficiency, and the smallest package to die ratio. The device requires few external components and has a pinout designed for simple PCB layout. The small solution size and feature set of the LMR34206-Q1 are designed to simplify implementation for a wide range of end equipment.

LMR34206FSC3RNXRQ1 LMR34206FSC3RNXRQ1

Hauptmerkmale

  • AEC-Q100-qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Designed for automotive applications
    • Junction temperature range –40°C to +150°C
    • Protection features: thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, hiccup short-circuit protection
    • 0.2-V dropout with 0.6-A load (typical)
    • ±1.5% reference voltage tolerance
    • 3.3-V, 5-V fixed-output voltage options
  • Suited for scalable power supplies
    • Pin compatible with:
      • LMR36015/06-Q1 (60 V, 0.6 A or 1.5 A)
      • LMR33620/30-Q1 (36 V, 2 A, or 3 A)
    • 2.1-MHz frequency option
  • Integration reduces solution size and cost
    • Small, 2-mm × 3-mm VQFN package with wettable flanks
    • Few external components
  • Low power dissipation across load spectrum
    • Increased light load efficiency in PFM
    • Low operating quiescent current of 24 µA
  • Optimized for ultra low EMI requirements
    • Meets CISPR25 class 5 standard
    • Hotrod™ package minimizes switch node ringing
    • Parallel input path minimizes parasitic inductance
    • Spread spectrum reduces peak emissions

Spezifikationen

Vin (min) (V) 3.6 Vin (max) (V) 42
Vout (min) (V) 3.3 Vout (max) (V) 40
Iout (max) (A) 0.6 Iq (typ) (mA) 0.025
Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 2100
EMI features Low parasitic Hotrod packaging, Spread Spectrum Features Enable, Fixed Output, Light Load Efficiency, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable flanks package
Operating temperature range (°C) -40 to 125 Rating Automotive
TI functional safety category Functional Safety-Capable Regulated outputs (#) 1
Control mode current mode Duty cycle (max) (%) 99
Type Converter

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