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Product details

Parameters

Vin (Min) (V) 3 Vin (Max) (V) 42 Vout (Min) (V) 1 Vout (Max) (V) 32 Iout (Max) (A) 1 Iq (Typ) (uA) 2 Switching frequency (Min) (kHz) 250 Switching frequency (Max) (kHz) 2200 Features Enable, Fixed Output, Forced PWM, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO Fixed, Wettable Flanks Package Operating temperature range (C) -40 to 150 Rating Automotive Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Features

  • Miniature solution size and low component cost
    • 2-mm × 2-mm HotRod™ package with wettable flanks
    • Internal compensation
  • Optimized for ultra-low EMI requirements
    • Spread spectrum reduces peak emissions
    • Pin selectable FPWM mode for constant frequency at light loads with MODE/SYNC pin
    • FSW synchronization with MODE/SYNC pin
  • Designed for industrial automotive applications
    • Junction temperature range: –40°C to +150°C
    • Supports 42-V transients
    • Supports 3-VIN minimum
    • Adjustable up to 95% of VIN, 3.3-V and 5-V fixed VOUT options available
  • > 85% efficiency at 1 mA
    • 1.5-µA IQ (switching) at 24 VIN, 3.3 fixed VOUT
  • Suitable for scalable power supplies
    • Adjustable FSW: 200 kHz - 2.2 MHz with RT pin
    • Pin compatible with:
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Description

The LMR436x0 is the industry’s smallest 36 V, 2 A and 1 A synchronous step-down DC/DC converters in 2-mm x 2-mm HotRod™ package. This easy-to-use converter supports a wide input voltage range of 3.0V to 36 V with transients up to 42 V. The transient tolerance reduces the necessary design effort to protect against input overvoltage and meets the surge immunity requirements of IEC 61000-4-5.

The control architecture and feature-set are optimized for an ultra-small solution size. The device uses peak current mode control to minimize output capacitance. The LMR436x0 minimizes input filter size by utilizing pseudo-random spread spectrum, a low-EMI HotRod™ package, and an optimized pin-out. The MODE/SYNC and RT pin variants can be used to set or synchronize the frequency between 200 kHz and 2.2 MHz to avoid noise sensistive frequency bands.

The rich feature set of the is designed to simplify implementation for a wide range of automotive end equipments.

The compact solution size and rich feature set of LMR436x0 simplifies implementation for a wide range of industrial applications.

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Technical documentation

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Type Title Date
* Data sheet LMR436x0, 36-V, 1-A/2-A Buck Converter with 1.5 µA IQ in 4-mm2 HotRod QFN datasheet Dec. 21, 2020
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

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