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LMR23625

ACTIVE
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SIMPLE SWITCHER®, 36V 2.5A Synchronous Step-Down Converter

Data sheet
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SIMPLE SWITCHER®, 36V 2.5A Synchronous Step-Down Converter

LMR23625

ACTIVE
Data sheet Order now

Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 30 Iout (Max) (A) 2.5 Iq (Typ) (uA) 75 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2200 Features Enable, Forced PWM, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Synchronous Rectification, UVLO Adjustable, Wettable Flanks Package 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 WSON (DRR) 12 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)

Features

  • 4-V to 36-V input range
  • 2.5-A continuous output current
  • Integrated synchronous rectification
  • Current mode control
  • Minimum switch ON time: 60 ns
  • 2.1-MHz switching frequency with PFM and forced-PWM-mode options (HSOIC)
  • 2.1-MHz switching frequency with forced-PWM mode only (WSON)
  • Frequency synchronization to external clock
  • Internal compensation for ease of use
  • 75-µA quiescent current at no load
  • Soft start into a prebiased load
  • High duty-cycle operation supported
  • Precision enable input
  • Output short-circuit protection with hiccup mode
  • Thermal protection
  • 8-Pin HSOIC with PowerPAD™ package
  • 12-Pin WSON wettable flanks package with PowerPAD™
  • Use the LMZM33603 module for faster time to market
  • Create a custom design using the LMR23625 with the WEBENCH Power Designer

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Description

The LMR23625 SIMPLE SWITCHER is an easy-to-use 36-V, 2.5-A synchronous step-down regulator. With a wide input range from 4 V to 36 V, the device is suitable for various industrial application 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 it 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. This also minimizes the external components. The device has an option for fixed-frequency FPWM mode to achieve small output-voltage ripple at light load. An extended family for HSOIC is available in 1-A (LMR23610) and 3-A (LMR23630) load current options in pin-to-pin compatible packages which allows 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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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
LMR33630 ACTIVE SIMPLE SWITCHER® 3.8V to 36V, 3A Synchronous Buck Converter With Ultra-Low EMI Next-generation 3.8-V to 36-V, 3-A synchronous buck converter with ultra-Low EMI.

Technical documentation

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Type Title Date
* Datasheet LMR23625 SIMPLE SWITCHER® 36-V, 2.5-A Synchronous Step-Down Converter datasheet (Rev. E) Jul. 01, 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
User guide LMR23625CFPDRREVM User’s Guide May 25, 2017
User guide LMR23625C EVM User's Guide (Rev. A) Jul. 06, 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
29
Description
The LMR23625CEVM is a fully assembled and tested circuit for evaluating the LMR23625CDDAR Step-Down Converter. The LMR23625CEVM operates from 4.5V to 36V input (12V nominal) and provides a 5.0V/3.3V output at 2.5A. The board has jumper connectors to select output options, enable or disable the (...)
Features
  • 4.5V to 20V Input Voltage Range
  • Jumper Selectable Output Options (5V or 3.3V)
  • Up to 2.5A Output Current
  • Switching Frequency 2.1MHz
  • Frequency Synchronization to External Clock
  • Hiccup Mode Short Circuit Protection
View details
EVALUATION BOARD Download
document-generic User guide
29
Description
The LMR23625CFPEVM is a fully assembled and tested circuit for evaluating the LMR23625CFPDRR step-down converter. The LMR23625CFPEVM operates from 4V to 36V input (12V nominal) and provides a 5.0V/3.3V output at 2.5A. The board has jumper connectors to select output options, enable or disable (...)
Features
  • 4V to 36V Input Voltage Range
  • Jumper Selectable Output Options (5V or 3.3V)
  • Up to 2.5A Output Current
  • 2.1MHz Switching Frequency
  • Frequency Synchronization to External Clock
View details

Design tools & simulation

SIMULATION MODEL Download
SNVMAU2.ZIP (888 KB) - PSpice Model
SIMULATION MODEL Download
SNVMAU3.ZIP (6 KB) - PSpice Model
SIMULATION MODEL Download
SNVMAU8.ZIP (7 KB) - PSpice Model
SIMULATION MODEL Download
SNVMAU9.ZIP (190 KB) - PSpice Model
SIMULATION MODEL Download
SNVMBE2.ZIP (217 KB) - PSpice Model
SIMULATION MODEL Download
SNVMBE3.ZIP (7 KB) - PSpice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
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 (...)
Features
  • 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
  • (...)
View details

Reference designs

REFERENCE DESIGNS Download
USB Car Charger with 2MHz Buck Converter, Cable Compensation and Battery Protection Reference Design
PMP40040 — The PMP40040 reference design is a single channel USB charger for automotive applications. It includes a high switching frequency buck converter which can minimize the size of power components and reduce the system's cost. It includes built-in short-to-battery protection, IEC ESD protection features (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive Gateway Power Solution Reference Design
PMP11757 — The PMP11757 reference design is a complete power solution for an automotive gateway and provides four different output voltages (3.3V @ 1.6A, 5.0V @ 250mA, 2.5V @ 140mA, 1.0V @ 110mA).
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options
WSON (DRR) 12 View options

Ordering & quality

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  • Ongoing reliability monitoring

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