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LMR23630

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SIMPLE SWITCHER®, 36V 3A Synchronous Step-Down Converter

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Data sheet

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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.
TLVM13630 ACTIVE High-density, 3-V to 36-V input, 1-V to 6-V output, 3-A step-down power module Smaller design with an integrated-inductor power module.

LMR23630

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 4.5 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable, Wettable flanks package Control mode current mode Vout (min) (V) 1 Vout (max) (V) 30 Iq (typ) (µA) 75 Duty cycle (max) (%) 97
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 4.5 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable, Wettable flanks package Control mode current mode Vout (min) (V) 1 Vout (max) (V) 30 Iq (typ) (µA) 75 Duty cycle (max) (%) 97
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
  • 3-A Continuous output current
  • Integrated synchronous rectification
  • Current-mode control
  • Minimum switch on-time: 60 ns
  • Internal compensation for ease of use
  • 400-kHz Switching frequency and adjustable frequency options
  • PFM and forced PWM mode options
  • Frequency synchronization to external clock
  • 75-µA Quiescent current at no load for PFM option
  • 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
  • 3-A Continuous output current
  • Integrated synchronous rectification
  • Current-mode control
  • Minimum switch on-time: 60 ns
  • Internal compensation for ease of use
  • 400-kHz Switching frequency and adjustable frequency options
  • PFM and forced PWM mode options
  • Frequency synchronization to external clock
  • 75-µA Quiescent current at no load for PFM option
  • 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 LMR23630 SIMPLE SWITCHER is an easy-to-use 36 V, 3 A synchronous step-down regulator. With a wide input range from 4 V to 36 V, it 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. This also minimizes the external components. The device has an option for constant frequency FPWM mode to achieve small output-voltage ripple at light load. An extended family (HSOIC) is available in 1-A (LMR23610) and 2.5-A (LMR23625) load-current options in a pin-to-pin compatible package 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.

The LMR23630 SIMPLE SWITCHER is an easy-to-use 36 V, 3 A synchronous step-down regulator. With a wide input range from 4 V to 36 V, it 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. This also minimizes the external components. The device has an option for constant frequency FPWM mode to achieve small output-voltage ripple at light load. An extended family (HSOIC) is available in 1-A (LMR23610) and 2.5-A (LMR23625) load-current options in a pin-to-pin compatible package 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 LMR23630 SIMPLE SWITCHER 36-V, 3-A Synchronous Step-Down Converter datasheet (Rev. E) PDF | HTML 11 Aug 2020
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Technical article A review of EMI standards, part 1 – conducted emissions PDF | HTML 28 Jun 2018
EVM User's guide LMR23630DRREVM User’s Guide 25 May 2017
EVM User's guide LMR23630A 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

LMR23630AEVM — LMR23630 Wide Vin Synchronous Step-Down Converter Evaluation Module

The LMR23630AEVM is a fully assembled and tested circuit for evaluating the LMR23630ADDAR Step-Down Converter. The LMR23630AEVM operates from 4V to 36V input (12V nominal) and provides a 5.0V/3.3V output at 3A. The board has jumper connectors to select output options, enable or disable the (...)
User guide: PDF
Not available on TI.com
Evaluation board

LMR23630EVM — LMR23630DDR Wide Vin Synchronous Step-down Converter Evaluation Module

The LMR23630EVM is a fully assembled and tested circuit for evaluating the LMR23630DRR step-down converter. The LMR23630EVM operates from 4V to 36V input (12V nominal) and provides a 5.0V/3.3V output at 3A. The board has jumper connectors to select output options, enable or disable the (...)
User guide: PDF
Not available on TI.com
Simulation model

LMR23630 Non-Inverting and Inverting PSpice Transient Model

SNVMBC2.ZIP (223 KB) - PSpice Model
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Simulation model

LMR23630 Unencrypted Non-Inverting and Inverting PSpice Transient Model

SNVMBC1.ZIP (7 KB) - PSpice Model
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Simulation model

LMR23630A Non-Inverting and Inverting PSpice Transient Model

SNVMAT9.ZIP (899 KB) - PSpice Model
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Simulation model

LMR23630A Unencrypted Non-Inverting and Inverting PSpice Transient Model

SNVMAT8.ZIP (7 KB) - PSpice Model
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Simulation model

LMR23630AF Non-Inverting and Inverting PSpice Transient Model

SNVMAU0.ZIP (912 KB) - PSpice Model
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Simulation model

LMR23630AF Unencrypted Non-Inverting and Inverting PSpice Transient Model

SNVMAU1.ZIP (7 KB) - PSpice Model
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Simulation model

LMR23630AP Non-Inverting and Inverting PSpice Transient Model

SNVMBC5.ZIP (224 KB) - PSpice Model
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Simulation model

LMR23630AP Unencrypted Non-Inverting and Inverting PSpice Transient Model

SNVMBC6.ZIP (7 KB) - PSpice Model
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Simulation model

LMR23630F Non-Inverting and Inverting PSpice Transient Model

SNVMBC3.ZIP (220 KB) - PSpice Model
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Simulation model

LMR23630F Unencrypted Non-Inverting and Inverting PSpice Transient Model

SNVMBC4.ZIP (7 KB) - PSpice Model
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Reference designs

PMP11668 — Single USB Car Charger with Cable Compensation and Battery Short Protection Reference Design

The PMP11668 reference design is a single channel USB charger for automotive application. It includes a buck converter followed by a USB charging port controller. Its built-in short-to-battery protection, IEC ESD protection features enhance the system's reliability significantly in automotive (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP15016 — CISPR-22 EMI-Optimized Reference Design Featuring LMR23630 Synchronous DC/DC Buck Converter

The PMP15016 reference design is a 5V/3A output power supply using the LMR23630 DC/DC buck regulator IC. This design uses a 4-layer board and is intended for industrial applications with a 24V input bus. LMR23630 is a 4.0V to 36V input, 3A output capable, and 400 kHz fixed synchronous buck (...)
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
HSOIC (DDA) 8 Ultra Librarian
WSON (DRR) 12 Ultra Librarian
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