Startseite Energiemanagement AC/DC- und DC/DC-Controller (externer FET)

LM5141-Q1

AKTIV

Synchroner Abwärtscontroller mit breitem Eingangsspannungsbereich für die Automobilindustrie, 2,2 MH

Produktdetails

Vin (min) (V) 3.8 Vin (max) (V) 65 Iout (max) (A) 30 Operating temperature range (°C) -40 to 150 Control mode current mode Rating Automotive Vout (min) (V) 1.5 Vout (max) (V) 15 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, Tracking, UVLO Fixed Iq (typ) (µA) 35 Duty cycle (max) (%) 78 Number of phases 1 TI functional safety category Functional Safety-Capable
Vin (min) (V) 3.8 Vin (max) (V) 65 Iout (max) (A) 30 Operating temperature range (°C) -40 to 150 Control mode current mode Rating Automotive Vout (min) (V) 1.5 Vout (max) (V) 15 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, Tracking, UVLO Fixed Iq (typ) (µA) 35 Duty cycle (max) (%) 78 Number of phases 1 TI functional safety category Functional Safety-Capable
VQFN (RGE) 24 16 mm² 4 x 4
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • VIN: 3.8 V to 65 V (70 V Absolute Maximum)
  • Output: Fixed 3.3 V, 5 V, or Adjustable From
    1.5 V to 15 V with ±0.8% Accuracy
  • Fixed 2.2-MHz or 440-kHz Switching Frequency with ±5% Accuracy
  • High-Side and Low-Side Gate Drive With Slew-Rate Control
  • Optional Frequency Shift by Varying an Analog Voltage or RT Resistor
  • Optional Synchronization to an External Clock
  • Optional Spread Spectrum
  • Shutdown Mode IQ: 10 µA Typical
  • Low Standby Mode IQ: 35 µA Typical
  • 75-mV Current Limit Threshold with ±0.9% Accuracy
  • External Resistor or DCR Current Sensing
  • Output Enable Logic Input
  • Hiccup Mode for Sustained Overload
  • Power-Good Indication Output
  • Selectable Diode Emulation or Forced Pulse-Width Modulation
  • 24-pin VQFN Package With Wettable Flanks
  • Create a Custom Design Using the LM5141-Q1 With the WEBENCH® Power Designer
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • VIN: 3.8 V to 65 V (70 V Absolute Maximum)
  • Output: Fixed 3.3 V, 5 V, or Adjustable From
    1.5 V to 15 V with ±0.8% Accuracy
  • Fixed 2.2-MHz or 440-kHz Switching Frequency with ±5% Accuracy
  • High-Side and Low-Side Gate Drive With Slew-Rate Control
  • Optional Frequency Shift by Varying an Analog Voltage or RT Resistor
  • Optional Synchronization to an External Clock
  • Optional Spread Spectrum
  • Shutdown Mode IQ: 10 µA Typical
  • Low Standby Mode IQ: 35 µA Typical
  • 75-mV Current Limit Threshold with ±0.9% Accuracy
  • External Resistor or DCR Current Sensing
  • Output Enable Logic Input
  • Hiccup Mode for Sustained Overload
  • Power-Good Indication Output
  • Selectable Diode Emulation or Forced Pulse-Width Modulation
  • 24-pin VQFN Package With Wettable Flanks
  • Create a Custom Design Using the LM5141-Q1 With the WEBENCH® Power Designer

The LM5141-Q1 is a synchronous buck controller, intended for high voltage wide VIN step-down converter applications. The control method is peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease-of-loop compensation. The LM5141-Q1 features slew rate control to simplify the compliance with CISPR and automotive EMI requirements.

The LM5141-Q1 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate drivers with slew rate Control that can be adjusted to reduce EMI.

In light or no-load conditions, the LM5141-Q1 operates in skip cycle mode for improved low power efficiency. The LM5141-Q1 has a high voltage bias regulator with automatic switch-over to an external bias to reduce the IQ current from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode fault protection for sustained overload, and power good output.

The LM5141-Q1 is a synchronous buck controller, intended for high voltage wide VIN step-down converter applications. The control method is peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease-of-loop compensation. The LM5141-Q1 features slew rate control to simplify the compliance with CISPR and automotive EMI requirements.

The LM5141-Q1 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate drivers with slew rate Control that can be adjusted to reduce EMI.

In light or no-load conditions, the LM5141-Q1 operates in skip cycle mode for improved low power efficiency. The LM5141-Q1 has a high voltage bias regulator with automatic switch-over to an external bias to reduce the IQ current from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode fault protection for sustained overload, and power good output.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM5141-Q1 Wide Input Range Synchronous Buck Controller datasheet (Rev. D) PDF | HTML 18 Dez 2017
Functional safety information LM25141-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) PDF | HTML 10 Mai 2022
Functional safety information LM5141-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 05 Apr 2022
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators 21 Apr 2021
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 10 Apr 2019
White paper An overview of radiated EMI specifications for power supplies 05 Jun 2018
White paper An overview of conducted EMI specifications for power supplies 01 Feb 2018
EVM User's guide LM5141-Q1 EVM User’s Guide (Rev. A) 10 Jan 2018
Application brief Improve DC/DC Regulator EMI for Free with Optimized Power Stage Layout 13 Nov 2017
Test report PMP15019 Test Results 28 Feb 2017
Analog Design Journal Designing the front-end DC/DC conversion stage to withstand automotive transient 18 Jan 2017
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 21 Jul 2016

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

LM5141QRGEVM — LM5141QRG Synchron-Abwärtswandler – Evaluierungsmodul

The LM5141QRGEVM evaluation board provides a fully functional buck power supply, employing peak current mode control. The evaluation board provides a 5.0V @ 5A. The nonomal input voltage range is 8V-18V.
Benutzerhandbuch: PDF
Simulationsmodell

LM5141-Q1 and LM25141-Q1 PSpice Transient Model (Rev. A)

SNVMAU4A.ZIP (123 KB) - PSpice Model
Berechnungstool

LM5141DESIGN-CALC LM5141-Q1 controller quickstart design tool

Welcome to the LM5141-Q1 quickstart design tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck regulator based on the LM5141-Q1 65-V synchronous buck DC/DC controller with low IQ. As such, the user can expeditiously arrive at an optimized design (...)
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LM5141 Synchroner Abwärts-Controller (Buck), niedriger Ruhestrom, großer Eingangsbereich LM5141-Q1 Synchroner Abwärtscontroller mit breitem Eingangsspannungsbereich für die Automobilindustrie, 2,2 MH
Hardware-Entwicklung
Evaluierungsplatine
LM5141QRGEVM LM5141QRG Synchron-Abwärtswandler – Evaluierungsmodul
Software
Berechnungstool
LM5141DESIGN-CALC LM5141-Q1 Controller-Schnellstart-Design-Tool
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Design guide: PDF
Schaltplan: PDF
Referenzdesigns

PMP15019 — Synchron-Abwärtsregler mit hohem Strom und großem VIN – Referenzdesign mit dem LM5141-Q1

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Referenzdesigns

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Schaltplan: PDF
Referenzdesigns

PMP20682 — Referenzdesign für synchronen Abwärtswandler für Automobil-Cluster-Anwendungen

PMP20682 is a synchronous buck converter reference design utilizing the LM5141-Q1 synchronous buck controller I.C. The design accepts an input voltage of 5V to 40V and provides a 3.3V output capable of supplying 10A of current to the load. An EMI filter is incorporated on the input. Optional (...)
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Referenzdesigns

PMP20818 — Referenzdesign für 137-W-Holdup-Wandler für Speicherserver

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Referenzdesigns

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Test report: PDF
Schaltplan: PDF
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
VQFN (RGE) 24 Ultra Librarian

Bestellen & Qualität

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  • RoHS
  • REACH
  • Bausteinkennzeichnung
  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
  • MTBF-/FIT-Schätzungen
  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
Beinhaltete Information:
  • Werksstandort
  • Montagestandort

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