Startseite Energiemanagement AC/DC & DC/DC controllers (external FET)
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Energiemanagement
AC/DC & DC/DC controllers (external FET)

LM25141

AKTIV

Synchroner Abwärts-Controller (Buck), niedriger Ruhestrom, großer Eingangsbereich

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Gleiche Funktionalität, andere Pinbelegung als verglichener Baustein
LM25149 AKTIV Synchroner DC/DC-Abwärtscontroller mit 42 V, extrem niedrigem IQ und integriertem aktivem EMI-Filter Active EMI filtering and DRSS reduces EMI by an average of 25 dBµV.

LM25141

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Vin (min) (V) 3.8 Vin (max) (V) 42 Iout (max) (A) 30 Operating temperature range (°C) -40 to 125 Control mode current mode Rating Catalog Vout (min) (V) 1.5 Vout (max) (V) 15 Iq (typ) (A) 0.000035 Duty cycle (max) (%) 96 Number of phases 1
Vin (min) (V) 3.8 Vin (max) (V) 42 Iout (max) (A) 30 Operating temperature range (°C) -40 to 125 Control mode current mode Rating Catalog Vout (min) (V) 1.5 Vout (max) (V) 15 Iq (typ) (A) 0.000035 Duty cycle (max) (%) 96 Number of phases 1
VQFN (RGE) 24 16 mm² 4 x 4
  • –40°C to +125°C Ambient Operating Temperature Range
  • An AEC-Q100 Qualified Device is Available
  • VIN 3.8 V to 45 V (47 V Absolute Maximum)
  • Output: Fixed 3.3 V, 5 V, or Adjustable From
    1.5 V - 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
  • QFN-24 Package with Wettable Flanks
  • Create a Custom Design Using the LM25141 With the WEBENCH® Power Designer
  • –40°C to +125°C Ambient Operating Temperature Range
  • An AEC-Q100 Qualified Device is Available
  • VIN 3.8 V to 45 V (47 V Absolute Maximum)
  • Output: Fixed 3.3 V, 5 V, or Adjustable From
    1.5 V - 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
  • QFN-24 Package with Wettable Flanks
  • Create a Custom Design Using the LM25141 With the WEBENCH® Power Designer

The LM25141 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 LM25141 features slew rate control to simplify the compliance with EMI requirements.

The LM25141 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 LM25141 operates in skip cycle mode for improved low power efficiency. The LM25141 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 LM25141 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 LM25141 features slew rate control to simplify the compliance with EMI requirements.

The LM25141 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 LM25141 operates in skip cycle mode for improved low power efficiency. The LM25141 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 LM25141 Wide Input Range Synchronous Buck Controller datasheet PDF | HTML 02 Feb 2017
Functional safety information LM25141 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
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
Nicht verfügbar auf TI.com
Simulationsmodell

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

SNVMAU4A.ZIP (123 KB) - PSpice Model
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Berechnungstool

LM25141DESIGN-CALC — LM25141-Q1 controller quickstart design tool

Welcome to the LM25141-Q1 quickstart calculator design tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck regulator based on the LM25141-Q1 42-V synchronous buck DC/DC controller with low IQ. As such, the user can expeditiously arrive at an (...)
Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
AC/DC & DC/DC controllers (external FET)
LM25141 — Synchroner Abwärts-Controller (Buck), niedriger Ruhestrom, großer Eingangsbereich LM25141-Q1 — Synchroner 2,2-MHz-Abwärts-Controller mit niedrigem Ruhestrom und Frequenz-Spread-Spektrum für die A
Hardware-Entwicklung
Evaluierungsplatine
LM5141QRGEVM — LM5141QRG Synchron-Abwärtswandler – Evaluierungsmodul
Software
Berechnungstool
LM25141DESIGN-CALC — LM25141-Q1 Controller-Schnellstart-Design-Tool
Herunterladen
Gehäuse Pins Herunterladen
VQFN (RGE) 24 Optionen anzeigen
Es gelten die allgemeinen Geschäftsbedingungen von TI für Evaluierungsartikel.

Bestellen & Qualität

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