Automotive 3.8-V to 36-V, 3-A synchronous step-down voltage converter

Automotive 3.8-V to 36-V, 3-A synchronous step-down voltage converter



Product details


Vin (Min) (V) 3.8 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 34 Iout (Max) (A) 3 Iq (Typ) (uA) 24 Switching frequency (Min) (kHz) 400 Switching frequency (Max) (kHz) 2100 Features Enable, Light Load Efficiency, Over Current Protection, Power Good, Soft Start Fixed, Synchronous Rectification, Wettable Flanks Package Operating temperature range (C) -40 to 125 Rating Automotive Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

VQFN-HR (RNX) 12 6 mm² 3 x 2 open-in-new Find other Buck converters (integrated switch)


  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Configured for rugged automotive applications
    • Input voltage range: 3.8 V to 36 V
    • Output voltage range: 1 V to 24 V
    • Output current: 2 A, 3 A
    • 75-mΩ/50-mΩ RDS-ON power MOSFETs
    • Peak-current-mode control
    • Short minimum on time of 68 ns
    • Frequency: 400 kHz, 2.1 MHz
    • Integrated compensation network
  • Low EMI and switching noise
    • HotRod™ package
    • Parallel input current paths
  • High power conversion at all loads
    • Peak efficiency > 95%
    • Low shutdown quiescent current of 5 µA
    • Low operating quiescent current of 25 µA
  • Create a custom design using the LMR336x0AP-Q1 with the WEBENCH Power Designer
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The LMR336x0AP-Q1 automotive-qualified regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged applications. The LMR336x0AP-Q1 drives up to 2 A or 3 A of load current from an input of up to 36 V. The LMR336x0AP-Q1 provides high light load efficiency and output accuracy in a very small solution size. 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 LMR336x0AP-Q1 automatically folds back frequency at light load to improve efficiency. Integration eliminates most external components and provides a pinout designed for simple PCB layout. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. The LMR336x0AP-Q1 is available in a 12-pin 3-mm × 2-mm next generation VQFN package with wettable flanks.

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Technical documentation

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Type Title Date
* Data sheet LMR336x0AP-Q1 3.8-V to 36-V, 2-A and 3-ASynchronous Step-Down Voltage Converter datasheet Jun. 14, 2021
Functional safety information LMR336x0AP-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA Jun. 14, 2021
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

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VQFN-HR (RNX) 12 View options

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