LMR34215-Q1 4.2-V to 42-V, 1.5-A ultra-small synchronous step-down converter | TI.com

LMR34215-Q1 (ACTIVE) 4.2-V to 42-V, 1.5-A ultra-small synchronous step-down converter

 

Description

The LMR34215-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 LMR34215-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 LMR34215-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 LMR34215-Q1 are designed to simplify implementation for a wide range of end equipment.

Features

  • 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
    • Spread-spectrum frequency modulation
    • HotRod™ package enables low EMI and minimized switch node ringing
    • 0.4-V dropout with 1.5-A load (typical)
    • ±1.5% reference voltage tolerance
    • 5-V fixed-output, adjustable output voltage options
  • Suited for scalable power supplies
    • Pin compatible With:
    • 400-kHz, 2.1-MHz frequency options
      • 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
          • 93% efficiency at 400 kHz (12VIN, 5VOUT, 1A)
          • Increased light load efficiency in PFM
          • Low operating quiescent current of 24 µA

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    Part Number
      Min   Max Range
    Vin  V
    Vout  V
    Iout  A
    Ambient Temp  °C -40 to 150°C

    Parametrics

    Compare all products in Buck converters (integrated switch) Email Download to Excel
    Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Package size: mm2:W x L (PKG)
    LMR34215-Q1 Order now 3.6     42     3.3     40     1.5     1     400     2100     0.025     Fixed Output
    Forced PWM
    Light Load Efficiency
    Over Current Protection
    Power Good
    Soft Start Fixed
    Spread Spectrum
    Synchronous Rectification
    Wettable Flanks Package    
    Current Mode     99     -40 to 125     Automotive     VQFN-HR | 12     Converter     12VQFN-HR: 6 mm2: 3 x 2 (VQFN-HR | 12)    
    LMR34206-Q1 Order now 3.6     42     3.3     40     0.6     1     400     2100     0.025     Enable
    Fixed Output
    Light Load Efficiency
    Power Good
    Soft Start Fixed
    Spread Spectrum
    Synchronous Rectification
    Wettable Flanks Package    
    Current Mode     99     -40 to 125     Automotive     VQFN-HR | 12     Converter     12VQFN-HR: 6 mm2: 3 x 2 (VQFN-HR | 12)