LM2591HV

ACTIVE

SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator

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Product details

Parameters

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Package | Pins | Size

TO-220 (NDH) 5 86 mm² 10.16 x 8.47 TO-263 (KTT) 5 155 mm² 10.16 x 15.24 open-in-new Find other Buck converters (integrated switch)

Features

  • 3.3-V, 5-V, and Adjustable Output Versions
  • Adjustable Version Output Voltage Range: 1.2 V
    to 57 V ±4% Maximum Over Line and Load
    Conditions
  • Specified 1-A Output Load Current
  • Available in 5-Pin Package
  • Input Voltage Range Up to 60 V
  • 150-kHz Fixed Frequency Internal Oscillator
  • ON and OFF Control
  • Low Power Standby Mode, IQ Typically 90 µA
  • High Efficiency
  • Thermal Shutdown and Current-Limit Protection
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Description

The LM2591HV series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, and an adjustable output version.

This series of switching regulators is similar to the LM2590HV, but without some of the supervisory and control features of the latter.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, improved line and load specifications, and a fixed-frequency oscillator.

The LM2591HV operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Available in a standard 5-pin package with several different lead bend options, and a 5-pin surface mount package.

Other features include a specified ±4% tolerance on output voltage under all conditions of input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 90-µA standby current. Self-protection features include a two stage current limit for the output switch and an over temperature shutdown for complete protection under fault conditions.

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Technical documentation

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Type Title Date
* Datasheet LM2591HV SIMPLE SWITCHER Power Converter 150-kHz, 1-A Step-Down Voltage Regulator datasheet (Rev. E) May 27, 2016
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Technical articles How to increase system reliability and simplify design using DC/DC converters Jun. 13, 2016
Technical articles The importance of accurate switching frequency and current limit when selecting buck regulators Apr. 19, 2016
Application notes Semiconductor and IC Package Thermal Metrics (Rev. C) Apr. 19, 2016
Technical articles Advantages of leaded packages in robust industrial designs Mar. 08, 2016
Application notes Cap Drop Offline Supply for E-Meters Jun. 16, 2015
Application notes Cost-Effective Transformerless Offline Supply for Light Load Applications (Rev. A) Jun. 16, 2015
Application notes Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) Sep. 12, 2014
Application notes AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) Apr. 24, 2013
Application notes AN-1081 Low-Cost Low-Parts-Count DC/DC Converter With Multiple Outputs (Rev. B) Apr. 23, 2013
Application notes AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) Apr. 23, 2013
Application notes AN-1197 Selecting Inductors for Buck Converters (Rev. B) Apr. 23, 2013
Application notes AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) Apr. 23, 2013
Application notes AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) Apr. 23, 2013
Application notes AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) Apr. 23, 2013
Application notes AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) Apr. 23, 2013
Application notes AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) Apr. 23, 2013
Application notes AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) Apr. 23, 2013
Application notes Simple Techniques Minimize Cross-Coupling in Distributed Power Systems Mar. 21, 2007
Application notes Input and Output Capacitor Selection Sep. 19, 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations Jul. 12, 2005
Application notes AN-643 EMI/RFI Board Design (Rev. B) May 03, 2004

Design & development

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Design tools & simulation

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CAD/CAE symbols

Package Pins Download
DDPAK/TO-263 (KTT) 5 View options
TO-220 (NDH) 5 View options

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