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LM5575-Q1

ACTIVE

75V, 1.5A Step-Down Switching Regulator

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Data sheet

LM5575-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Topology Buck Iout (max) (A) 1.5 Vin (max) (V) 75 Vin (min) (V) 6 Vout (max) (V) 70 Vout (min) (V) 1.23 Features Enable, Frequency synchronization, Over Current Protection, Soft Start Adjustable, Tracking Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.001 Duty cycle (max) (%) 95
Rating Automotive Topology Buck Iout (max) (A) 1.5 Vin (max) (V) 75 Vin (min) (V) 6 Vout (max) (V) 70 Vout (min) (V) 1.23 Features Enable, Frequency synchronization, Over Current Protection, Soft Start Adjustable, Tracking Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.001 Duty cycle (max) (%) 95
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • AEC-Q100-qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C operating temperature
    • Device HBM ESD classification level 2
  • Integrated 75V, 330mΩ N-channel MOSFET
  • Ultra-wide input-voltage from 6V to 75V
  • Adjustable output voltage as low as 1.225V
  • 1.65% feedback reference accuracy
  • Operating frequency adjustable between 50kHz and 500kHz with single resistor
  • Controller or peripheral frequency synchronization
  • Adjustable soft start
  • Emulated current-mode-control architecture
  • Wide bandwidth error amplifier
  • Built-in protection
  • Create a custom design using the LM5575-Q1 with the WEBENCH Power Designer
  • AEC-Q100-qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C operating temperature
    • Device HBM ESD classification level 2
  • Integrated 75V, 330mΩ N-channel MOSFET
  • Ultra-wide input-voltage from 6V to 75V
  • Adjustable output voltage as low as 1.225V
  • 1.65% feedback reference accuracy
  • Operating frequency adjustable between 50kHz and 500kHz with single resistor
  • Controller or peripheral frequency synchronization
  • Adjustable soft start
  • Emulated current-mode-control architecture
  • Wide bandwidth error amplifier
  • Built-in protection
  • Create a custom design using the LM5575-Q1 with the WEBENCH Power Designer

The LM5575-Q1 is an easy-to-use buck regulator that allows design engineers to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6V to 75V, the LM5575-Q1 delivers 1.5A of continuous output current with an integrated 330mΩ N-channel MOSFET. The regulator uses an emulated current mode architecture which provides inherent line regulation, tight load-transient response, and ease-of-loop compensation without the usual limitation of low-duty cycles associated with current mode regulators. The operating frequency is adjustable from 50kHz to 500kHz to allow optimization of size and efficiency. The LM5575-Q1 makes sure of robustness with cycle-by-cycle current limit, short-circuit protection, thermal shutdown, and remote shutdown. The device is available in a power enhanced 16-pin HTSSOP package featuring an exposed die attach pad for thermal dissipation. The LM5575-Q1 is supported by the full suite of WEBENCH circuit design and selection simulation services online design tools.

The LM5575-Q1 is an easy-to-use buck regulator that allows design engineers to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6V to 75V, the LM5575-Q1 delivers 1.5A of continuous output current with an integrated 330mΩ N-channel MOSFET. The regulator uses an emulated current mode architecture which provides inherent line regulation, tight load-transient response, and ease-of-loop compensation without the usual limitation of low-duty cycles associated with current mode regulators. The operating frequency is adjustable from 50kHz to 500kHz to allow optimization of size and efficiency. The LM5575-Q1 makes sure of robustness with cycle-by-cycle current limit, short-circuit protection, thermal shutdown, and remote shutdown. The device is available in a power enhanced 16-pin HTSSOP package featuring an exposed die attach pad for thermal dissipation. The LM5575-Q1 is supported by the full suite of WEBENCH circuit design and selection simulation services online design tools.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet LM5575-Q1 75V, 1.5A, Automotive, Step-Down Switching Regulator datasheet (Rev. G) PDF | HTML 18 May 2026
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25 Mar 2024
White paper Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) 03 Jul 2018
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 12 Sep 2014
Application note AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) 06 May 2013
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 Apr 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23 Apr 2013
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23 Apr 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23 Apr 2013
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23 Apr 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23 Apr 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23 Apr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 Apr 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 Apr 2013
Application note Quick Start Guide for a 1.5 Amp Buck Regulator Using the LM5575 and LM25575 (Rev. B) 23 Apr 2013
More literature Die D/S LM5575Q0-MDC MWC SIMPLE SWITCHER® 75v, 1.5a step-down switching reg 13 Mar 2013
More literature Die D/S LM5575 MDC MWC Simple Switcher 75V, 1.5A Step-down Switching Regulator 10 Jan 2013
More literature Die D/S LM5575Q0 MDC MCD2870A Simple Switcher® 75V, 1.5A Step-Down Switching Reg 19 Oct 2012
Application note Understanding and Applying Current-Mode Control Theory 19 Aug 2007
Application note Input and Output Capacitor Selection 19 Sep 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 Jul 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) 03 May 2004

Design & development

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

Evaluation board

LM5575EVAL — 75V, 1.5A Step-Down Switching Regulator Evaluation Module

The LM5575 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM5575 regulator IC. The evaluation board provides a 5V output with a 1.5A current capability. The ultra-wide input voltage ranges (...)

User guide: PDF
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Simulation model

LM5575 Non-Inverting and Inverting PSpice Transient Model (Rev. A)

SNVM033A.ZIP (86 KB) - PSpice Model
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Simulation model

LM5575 Non-Inverting and Inverting Unencrypted PSpice Transient Model (Rev. A)

SNVM963A.ZIP (4 KB) - PSpice Model
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Simulation model

LM5575 TINA-TI Transient Reference Design

SNVM352.TSC (146 KB) - TINA-TI Reference Design
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Simulation model

LM5575 TINA-TI Transient Spice Model

SNVM351.ZIP (17 KB) - TINA-TI Spice Model
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Calculation tool

LM2557X-557XQUICK-CALC — LM(2)557x Quick Start SIMPLE SWITCHER Component Calculator

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Calculation tool

SIMPLESWITCHER-COMPONENT-CALC — Downloadable LM(2)557x Quick Start SIMPLE SWITCHER Component Calculator

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HTSSOP (PWP) 16 Ultra Librarian
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