Product details

Vin (Min) (V) 4.2 Vin (Max) (V) 65 Vout (Min) (V) 1 Vout (Max) (V) 62 Iout (Max) (A) 2 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
Vin (Min) (V) 4.2 Vin (Max) (V) 65 Vout (Min) (V) 1 Vout (Max) (V) 62 Iout (Max) (A) 2 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
HSOIC (DDA) 8 19 mm² 4.9 x 3.9
  • 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
  • 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

The LMR36520 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 2 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 LMR36520 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 LMR36520 is pin-to-pin compatible with the LMR36510 (65 V, 1 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 LMR36520 is in an 8-pin HSOIC package.

The LMR36520 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 2 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 LMR36520 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 LMR36520 is pin-to-pin compatible with the LMR36510 (65 V, 1 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 LMR36520 is in an 8-pin HSOIC package.

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Technical documentation

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Type Title Date
* Data sheet LMR36520 4.2-V to 60-V, 2-A Ultra-small Synchronous Step-down Converter datasheet (Rev. B) 09 Apr 2020
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Application note Designing an Isolated Buck (Flybuck) Converter using the LMR36520 08 Jan 2021
Certificate LMR36520AEVM EU Declaration of Conformity (DoC) 06 May 2020
Technical article 3 tips when designing a power stage for servo and AC drives 20 Nov 2019
User guide LMR36520AEVM User’s Guide 24 Jun 2019
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Technical article How to increase system reliability and simplify design using DC/DC converters 13 Jun 2016

Design & development

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Evaluation board

LMR36520AEVM — SIMPLE SWITCHER® 4.2-V to 65-V, 2-A synchronous step-down converter with 26-uA IQ evaluation mod

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

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Simulation model

LMR36520A PSpice Unencrypted Transient Model (Rev. A)

SNVMBX7A.ZIP (185 KB) - PSpice Model
Simulation model

LMR36520FA PSpice Unencrypted Transient Model (Rev. A)

SNVMBX8A.ZIP (188 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Reference designs

TIDA-010052 — Safety power supply for motor drives reference design

This reference design implements a safe-power supply for powering up microcontrollers in an architecture featuring two MCUs. The design has several protection features including overvoltage protection and short circuit protection to prevent the MCUs from getting damaged. The DC/DCs, LMR36515 and (...)
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