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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 Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 1.5 Vin (min) (V) 6 Vin (max) (V) 75 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 500 Features Enable, Frequency synchronization, Over Current Protection, Soft Start Adjustable, Tracking Control mode current mode Vout (min) (V) 1.23 Vout (max) (V) 70 Iq (typ) (µA) 1000 Duty cycle (max) (%) 95
Rating Automotive Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 1.5 Vin (min) (V) 6 Vin (max) (V) 75 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 500 Features Enable, Frequency synchronization, Over Current Protection, Soft Start Adjustable, Tracking Control mode current mode Vout (min) (V) 1.23 Vout (max) (V) 70 Iq (typ) (µA) 1000 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 temperature grade 0: –40°C to +150°C operating temperature
    • Device HBM ESD classification level 2
  • Integrated 75-V, 330-mΩ N-channel MOSFET
  • Ultra-wide input-voltage from 6 V to 75 V
  • Adjustable output voltage as low as 1.225 V
  • 1.65% Feedback reference accuracy
  • Operating frequency adjustable between 50 kHz and 500 kHz with single resistor
  • Master or slave 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 temperature grade 0: –40°C to +150°C operating temperature
    • Device HBM ESD classification level 2
  • Integrated 75-V, 330-mΩ N-channel MOSFET
  • Ultra-wide input-voltage from 6 V to 75 V
  • Adjustable output voltage as low as 1.225 V
  • 1.65% Feedback reference accuracy
  • Operating frequency adjustable between 50 kHz and 500 kHz with single resistor
  • Master or slave 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 6 V to 75 V, the LM5575-Q1 delivers 1.5 A of continuous output current with an integrated 330-mΩ N-channel MOSFET. The regulator utilizes 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 50 kHz to 500 kHz to allow optimization of size and efficiency. The LM5575-Q1 ensures 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® on-Line design tools. For AEC-Q100 grade 1 and grade 0 orderable numbers, see the orderable addendum at the end of this data sheet.

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 6 V to 75 V, the LM5575-Q1 delivers 1.5 A of continuous output current with an integrated 330-mΩ N-channel MOSFET. The regulator utilizes 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 50 kHz to 500 kHz to allow optimization of size and efficiency. The LM5575-Q1 ensures 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® on-Line design tools. For AEC-Q100 grade 1 and grade 0 orderable numbers, see the orderable addendum at the end of this data sheet.
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Technical documentation

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Type Title Date
* Data sheet LM5575-Q1 75-V, 1.5-A Step-down Switching Regulator datasheet (Rev. F) PDF | HTML 15 Dec 2018
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
EVM User's guide AN-1569 LM5575 Evaluation Board (Rev. C) 26 Apr 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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