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LMR24220

ACTIVE

42Vin, 2.0A Step-Down Voltage Regulator in micro SMD

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Data sheet

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LMR51420 ACTIVE SIMPLE SWITCHER® power converter 4.5V-to-36V, 2A, synchronous buck with 40µA IQ Smaller footprint in SOT-23 package, integrated compensation and synchronous rectification.

LMR24220

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 24 Vout (min) (V) 0.8 Features Enable, Overcurrent protection, Synchronous rectification Control mode COT with emulated ripple Operating temperature range (°C) -20 to 125 Iq (typ) (A) 0.0007 Duty cycle (max) (%) 94
Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 24 Vout (min) (V) 0.8 Features Enable, Overcurrent protection, Synchronous rectification Control mode COT with emulated ripple Operating temperature range (°C) -20 to 125 Iq (typ) (A) 0.0007 Duty cycle (max) (%) 94
DSBGA (YPA) 28 0.5625 mm² (— mm × — mm)
  • Input Voltage Range of 4.5 V to 42 V
  • Output Voltage Range of 0.8 V to 24 V
  • Output Current up to 2 A
  • Integrated Low RDS(ON) Synchronous MOSFETs for High Efficiency
  • Up to 1-MHz Switching Frequency
  • Low Shutdown IQ, 25 µA Typical
  • Programmable Soft Start
  • No Loop Compensation Required
  • COT Architecture with ERM
  • Tiny Overall Solution Reduces System Cost
  • Integrated Synchronous MOSFETs Provides High Efficiency at Low Output Voltages
  • COT with ERM Architecture
  • Stable with Low ESR Capacitors
  • 28-Bump DSBGA (3.676 × 2.48 × 0.60 mm maximum) Packaging
  • Create a custom design using the LMR24220 with the WEBENCH® Power Designer
  • Input Voltage Range of 4.5 V to 42 V
  • Output Voltage Range of 0.8 V to 24 V
  • Output Current up to 2 A
  • Integrated Low RDS(ON) Synchronous MOSFETs for High Efficiency
  • Up to 1-MHz Switching Frequency
  • Low Shutdown IQ, 25 µA Typical
  • Programmable Soft Start
  • No Loop Compensation Required
  • COT Architecture with ERM
  • Tiny Overall Solution Reduces System Cost
  • Integrated Synchronous MOSFETs Provides High Efficiency at Low Output Voltages
  • COT with ERM Architecture
  • Stable with Low ESR Capacitors
  • 28-Bump DSBGA (3.676 × 2.48 × 0.60 mm maximum) Packaging
  • Create a custom design using the LMR24220 with the WEBENCH® Power Designer

The LMR24220 synchronously rectified buck converter features all required functions to implement a highly efficient and cost effective buck regulator. It is capable of supplying 2-A to loads with an output voltage as low as 0.8 V. Dual N-channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LMR24220 does not rely on output capacitor ESR for stability. The device is designed to work exceptionally well with ceramic and other very low ESR output capacitors. It requires no loop compensation, results in a fast load-transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the on-time. The operating frequency can be externally programmed up to 1 MHz. Protection features include VCC undervoltage lockout, output overvoltage protection, thermal shutdown, and gate drive undervoltage lockout. The LMR24220 is available in the small DSBGA low profile chip-scale package.

The LMR24220 synchronously rectified buck converter features all required functions to implement a highly efficient and cost effective buck regulator. It is capable of supplying 2-A to loads with an output voltage as low as 0.8 V. Dual N-channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LMR24220 does not rely on output capacitor ESR for stability. The device is designed to work exceptionally well with ceramic and other very low ESR output capacitors. It requires no loop compensation, results in a fast load-transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the on-time. The operating frequency can be externally programmed up to 1 MHz. Protection features include VCC undervoltage lockout, output overvoltage protection, thermal shutdown, and gate drive undervoltage lockout. The LMR24220 is available in the small DSBGA low profile chip-scale package.

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Technical documentation

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* Data sheet LMR24220 42-VIN, 2-A Step-Down Voltage Regulator in DSBGA Package datasheet (Rev. F) PDF | HTML Jun 17, 2019
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML Mar 25, 2024
Selection guide Power Management Guide 2018 (Rev. R) Jun 25, 2018
Application note Absolute Maximum Ratings for Soldering (Rev. D) Jun 9, 2016
Application note Cap Drop Offline Supply for E-Meters Jun 16, 2015
Application note Inverting Applications Made SIMPLE With LM4600x and LM4360x (Rev. B) Feb 20, 2015
Application note Thermal Design Made Simple With LM43603 and LM46002 Sep 15, 2014
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) Sep 12, 2014
Application note Compensation Made SIMPLE With LM4360x, LM4600x Jul 29, 2014
Application note Automotive Line Transient Protection Circuit Jul 1, 2014
User guide AN-2193 LMR24220 Multi-Rail Reference Board (Rev. A) Apr 24, 2013
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) Apr 24, 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) Apr 23, 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) Apr 23, 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) Apr 23, 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) Apr 23, 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) Apr 23, 2013
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) Apr 23, 2013
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) Apr 23, 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) Apr 23, 2013
Application note Input and Output Capacitor Selection Sep 19, 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations Jul 12, 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) May 3, 2004

Design & development

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Evaluation board

LMR24220EVAL — LMR24220 Small Footprint 42V Buck Regulator 2A Evaluation Board

The LMR24210/20 Step Down Switching Regulator features all required functions to implement a cost effective, efficient buck power converter capable of supplying up to 1.0A or 2.0A. The Constant On-Time (COT) regulation scheme requires no loop compensation, results in a fast load transient response (...)

User guide: PDF
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Evaluation board

LMR24220RB — LMR24220 5-Watt Multi-Rail Power Supply Reference Board

The LMR24220 Multi-Rail reference board implements an extremely compact solution. It is designed to convert from 12V or 24V rails down to typical point-of-load voltages of 3.3V, 1.8V and 1.2V. This design utilizes an LMR24220 Nano Regulator and two LMZ10501 Nano Modules to demonstrate a complete (...)

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Simulation model

LMR24220 PSpice Transient Model

SNVM217.ZIP (204 KB) - PSpice model
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Simulation model

LMR24220 Unencrypted PSpice Transient Model

SNVM946.ZIP (3 KB) - PSpice model
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DSBGA (YPA) 28 Ultra Librarian
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