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Buck converters (integrated switch)

LMR23625

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

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Data sheet

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NEW LMQ66430 ACTIVE 36-V, 3-A low EMI synchronous step-down converter with 1.5-µA IQ Integrated input bypass capacitor and boot cap for lower EMI and smaller footprint, dual-random spread spectrum and lower IQ.

LMR23625

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 4.5 Vin (max) (V) 36 Vout (min) (V) 1 Vout (max) (V) 30 Iout (max) (A) 2.5 Iq (typ) (mA) 0.075 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 Control mode current mode Duty cycle (max) (%) 97 Type Converter
Vin (min) (V) 4.5 Vin (max) (V) 36 Vout (min) (V) 1 Vout (max) (V) 30 Iout (max) (A) 2.5 Iq (typ) (mA) 0.075 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 Control mode current mode Duty cycle (max) (%) 97 Type Converter
HSOIC (DDA) 8 29.4 mm² 4.9 x 6 WSON (DRR) 12 9 mm² 3 x 3
  • 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
  • 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

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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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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Technical documentation

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

Design & development

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

Evaluation board

LMR23625CEVM — LMR23625C Wide Vin Synchronous Step-Down Converter Evaluation Module

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 (...)
User guide: PDF
Not available on TI.com
Evaluation board

LMR23625CFPEVM — LMR23625CFPDDR Wide Vin Synchronous Step-down Converter Evaluation Module

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 (...)
User guide: PDF
Not available on TI.com
Simulation model

LMR23625C Non-Inverting and Inverting PSpice Transient Model

SNVMAU2.ZIP (888 KB) - PSpice Model
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Simulation model

LMR23625C Unencrypted Non-Inverting and Inverting PSpice Transient Model

SNVMAU3.ZIP (6 KB) - PSpice Model
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Simulation model

LMR23625CF Non-Inverting and Inverting PSpice Transient Model

SNVMAU9.ZIP (190 KB) - PSpice Model
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Simulation model

LMR23625CF Unencrypted Non-Inverting and Inverting PSpice Transient Model

SNVMAU8.ZIP (7 KB) - PSpice Model
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Simulation model

LMR23625CFP Non-Inverting and Inverting PSpice Transient Model

SNVMBE2.ZIP (217 KB) - PSpice Model
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Simulation model

LMR23625CFP Unencrypted Non-Inverting and Inverting PSpice Transient Model

SNVMBE3.ZIP (7 KB) - PSpice Model
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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 (...)
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Reference designs

PMP40040 — USB Car Charger with 2MHz Buck Converter, Cable Compensation and Battery Protection Reference Design

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 (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP11757 — Automotive Gateway Power Solution Reference Design

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).
Test report: PDF
Schematic: PDF
Package Pins Download
HSOIC (DDA) 8 View options
WSON (DRR) 12 View options

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