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LMR33620 ACTIVE SIMPLE SWITCHER® 3.8V to 36V, 2A Synchronous Buck Converter With Ultra-Low EMI Smaller QFN package, 2-A rated output current

Product details

Vin (Min) (V) 4 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 28 Iout (Max) (A) 1.5 Iq (Typ) (uA) 75 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2200 Features Enable, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Pre-Bias Start-Up, Synchronous Rectification, UVLO Adjustable, Wettable Flanks Package Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 4 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 28 Iout (Max) (A) 1.5 Iq (Typ) (uA) 75 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2200 Features Enable, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Pre-Bias Start-Up, Synchronous Rectification, UVLO Adjustable, Wettable Flanks Package Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
WSON (DRR) 12 9 mm² 3 x 3
  • 4-V to 36-V input range
  • 1.5-A Continuous output current
  • Integrated synchronous rectification
  • Current-mode control with internal compensation
  • Minimum switch ON-time: 60 ns
  • Adjustable switching frequency
  • PFM mode at light load
  • Frequency synchronization to external clock
  • 75-µA Quiescent current
  • Soft start into a prebiased load
  • High-duty-cycle operation supported
  • Output short-circuit protection with hiccup mode
  • Thermal protection
  • 12-Pin WSON wettable flanks package with PowerPAD™
  • Use the LMZM22602 module for faster time to market
  • Create a custom design using the LMR23615 with the WEBENCH Power Designer
  • 4-V to 36-V input range
  • 1.5-A Continuous output current
  • Integrated synchronous rectification
  • Current-mode control with internal compensation
  • Minimum switch ON-time: 60 ns
  • Adjustable switching frequency
  • PFM mode at light load
  • Frequency synchronization to external clock
  • 75-µA Quiescent current
  • Soft start into a prebiased load
  • High-duty-cycle operation supported
  • Output short-circuit protection with hiccup mode
  • Thermal protection
  • 12-Pin WSON wettable flanks package with PowerPAD™
  • Use the LMZM22602 module for faster time to market
  • Create a custom design using the LMR23615 with the WEBENCH Power Designer

The LMR23615 SIMPLE SWITCHER is an easy-to-use 36-V, 1.5-A synchronous step-down regulator. With a wide input range from 4 V to 36 V, the device is suitable for various industrial applications for power conditioning from unregulated sources. Peak current mode control is employed to achieve simple control-loop compensation and cycle-by-cycle current limiting. A quiescent current of 75 µA makes the device suitable for battery-powered systems. An ultra-low 2-µA shutdown current can further prolong battery life. Internal loop compensation means that the user is free from the tedious task of loop-compensation design and also minimizes the external components needed. An extended family is available in 2.5-A (LMR23625) and 3-A (LMR23630) load-current options in pin-to-pin compatible packages, allowing simple, optimum PCB layout. A precision enable input allows simplification of regulator control and system power sequencing. Protection features include cycle-by-cycle current limit, hiccup-mode short-circuit protection, and thermal shutdown due to excessive power dissipation.

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The LMR23615 SIMPLE SWITCHER is an easy-to-use 36-V, 1.5-A synchronous step-down regulator. With a wide input range from 4 V to 36 V, the device is suitable for various industrial applications for power conditioning from unregulated sources. Peak current mode control is employed to achieve simple control-loop compensation and cycle-by-cycle current limiting. A quiescent current of 75 µA makes the device suitable for battery-powered systems. An ultra-low 2-µA shutdown current can further prolong battery life. Internal loop compensation means that the user is free from the tedious task of loop-compensation design and also minimizes the external components needed. An extended family is available in 2.5-A (LMR23625) and 3-A (LMR23630) load-current options in pin-to-pin compatible packages, allowing simple, optimum PCB layout. A precision enable input allows simplification of regulator control and system power sequencing. Protection features include cycle-by-cycle current limit, hiccup-mode short-circuit protection, and thermal shutdown due to excessive power dissipation.

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Technical documentation

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Type Title Date
* Data sheet LMR23615 SIMPLE SWITCHER® 36-V, 1.5-A Synchronous Step-Down Converter datasheet (Rev. B) 11 Aug 2020
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
EVM User's guide LMR23615 EVM User's Guide 03 May 2017

Design & development

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Evaluation board

LMR23615EVM — Wide Vin Synchronous Step-down Converter Evaluation Module

The LMR23615EVM is a fully assembled and tested circuit for evaluating the LMR23615DRR step-down converter. The LMR23615EVM operates from 4V to 36V input (12V nominal) and provides a 5.0V/3.3V output at 1.5A. The board has jumper connectors to select output options, enable or disable the (...)
Simulation model

LMR23615 Non-Inverting and Inverting PSpice Transient Model

SNVMBD4.ZIP (222 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 (...)
Package Pins Download
WSON (DRR) 12 View options

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