SIMPLE SWITCHER® 4.2-V to 65-V, 1-A synchronous step-down converter with 26-uA IQ


Product details


Vin (Min) (V) 4.2 Vin (Max) (V) 65 Vout (Min) (V) 1 Vout (Max) (V) 62 Iout (Max) (A) 1 Iq (Typ) (uA) 26 Switching frequency (Min) (kHz) 340 Switching frequency (Max) (kHz) 460 Features Enable, Light Load Efficiency, Over Current Protection, Power Good, Soft Start Fixed, UVLO Fixed Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 open-in-new Find other Buck converters (integrated switch)


  • Designed for reliable and rugged applications
    • Input transient protection up to 70 V
    • Protection features: thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, hiccup short-circuit protection
  • Well-suited for scalable industrial power supplies
    • Pin compatible with:
    • Internal compensation helps reduce solution size, cost and design complexity
    • 400-kHz frequency
  • Wide conversion range
    • Input voltage range: 4.2 V to 65 V
    • Output voltage range: 1 V to 95% of VIN
  • Low-power dissipation across load spectrum
    • 90% efficiency: 24 VIN, 5 VOUT, 1 A at 400 kHz
    • Increased light-load efficiency in PFM mode
    • Low operating quiescent current of 26 µA
  • Power-good output with filter and delayed release
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The LMR36510 regulator is an easy-to-use, synchronous, step-down DC/DC SIMPLE SWITCHER converter. With integrated high-side and low-side power MOSFETs, output current up to 1 A is delivered over a wide input voltage range of 4.2 V to 65 V. The transient tolerance that goes up to 70 V reduces the solution size and cost to protect against overvoltages and meets the surge immunity requirements of IEC 61000-4-5.

The LMR36510 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.

Integration and internal compensation eliminates many external components and provides a pinout designed for a simple PCB layout. The feature set of the device is designed to simplify implementation for a wide range of end equipment. The LMR36510 is pin-to-pin compatible with the LMR36520 (65 V, 2 A) and LMR33610, LMR33620, LMR33630 and LMR33640 (36 V, 1 A/2 A/3 A/4 A), completing the latest family of SIMPLE SWITCHER converters. This increases the ease of use and scalability of wide Vin converters across various commonly used voltage and current ratings without having the need to redesign the board layout. As a result, the overall cost, design effort and time to market are optimized.

The LMR36510 is in an 8-pin HSOIC package.

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Technical documentation

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Type Title Date
* Data sheet LMR36510 SIMPLE SWITCHER 4.2-V to 65-V, 1-A Synchronous Step-down Converter datasheet (Rev. A) Jan. 30, 2020
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr. 08, 2021
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Technical article How to increase system reliability and simplify design using DC/DC converters Jun. 13, 2016
Technical article Advantages of leaded packages in robust industrial designs Mar. 08, 2016

Design & development

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Hardware development

document-generic User guide

The LMR36520AEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR36520 synchronous step-down converter.

  • Integrated synchronous rectification
  • Low operating quiescent current
  • High efficiency at light loads
  • Low minimum on-time

Design tools & simulation

SNVMBX9A.ZIP (174 KB) - PSpice Model
SNVMBY0.ZIP (174 KB) - PSpice Model
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PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
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CAD/CAE symbols

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