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

LM25143

AKTIV

Stapelbarer synchroner DC/DC-Abwärts-Controller, 3,5 bis 42 V, mit extrem niedrigem IQ und zwei Ausg

Produktdetails

Vin (min) (V) 3.5 Vin (max) (V) 47 Iout (max) (A) 100 Operating temperature range (°C) -40 to 150 Control mode current mode Topology Buck Controller Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 36 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Multiple Outputs, Phase Interleaving, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 16.5 Duty cycle (max) (%) 99 Number of phases 2 TI functional safety category Functional Safety-Capable
Vin (min) (V) 3.5 Vin (max) (V) 47 Iout (max) (A) 100 Operating temperature range (°C) -40 to 150 Control mode current mode Topology Buck Controller Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 36 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Multiple Outputs, Phase Interleaving, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 16.5 Duty cycle (max) (%) 99 Number of phases 2 TI functional safety category Functional Safety-Capable
VQFN (RHA) 40 36 mm² 6 x 6
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 3.5 V to 42 V
    • 1% accurate, fixed 3.3-V, 5-V, or adjustable outputs from 0.6 V to 36 V
    • 150°C maximum junction temperature
    • 4-µA typical shutdown mode current
    • 15-µA typical no-load standby current
  • Two interleaved synchronous buck channels
    • Dual channel or single-output multiphase
    • 65-ns tON(min) for high VIN/VOUT ratio
    • 60-ns tOFF(min) for low dropout
  • Inherent protection features for robust design
    • Shunt or inductor DCR current sensing
    • Hiccup mode overcurrent protection
    • Independent ENABLE and PGOOD functions
    • Adjustable output voltage soft start
    • VCC, VDDA, and gate-drive UVLO protection
    • Thermal shutdown protection with hysteresis
  • Optimized for CISPR 11 and CISPR 32 class B conducted and radiatedEMI requirements
    • Slew-rate controlled adaptive gate drivers
    • Spread spectrum reduces peak emissions
  • 100-kHz to 2.2-MHz switching frequency
    • SYNC in and SYNC out capability
    • Selectable diode emulation or FPWM modes
  • 6-mm × 6-mm VQFN-40 package
  • Create a custom design using the LM25143 with WEBENCH Power Designer
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 3.5 V to 42 V
    • 1% accurate, fixed 3.3-V, 5-V, or adjustable outputs from 0.6 V to 36 V
    • 150°C maximum junction temperature
    • 4-µA typical shutdown mode current
    • 15-µA typical no-load standby current
  • Two interleaved synchronous buck channels
    • Dual channel or single-output multiphase
    • 65-ns tON(min) for high VIN/VOUT ratio
    • 60-ns tOFF(min) for low dropout
  • Inherent protection features for robust design
    • Shunt or inductor DCR current sensing
    • Hiccup mode overcurrent protection
    • Independent ENABLE and PGOOD functions
    • Adjustable output voltage soft start
    • VCC, VDDA, and gate-drive UVLO protection
    • Thermal shutdown protection with hysteresis
  • Optimized for CISPR 11 and CISPR 32 class B conducted and radiatedEMI requirements
    • Slew-rate controlled adaptive gate drivers
    • Spread spectrum reduces peak emissions
  • 100-kHz to 2.2-MHz switching frequency
    • SYNC in and SYNC out capability
    • Selectable diode emulation or FPWM modes
  • 6-mm × 6-mm VQFN-40 package
  • Create a custom design using the LM25143 with WEBENCH Power Designer

The LM25143 is a 42-V DC/DC synchronous buck controller for high-current single or dual outputs. Deriving from a family of wide-VIN range controllers, the device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output current. A high-side switch minimum on time of 65 ns provides large step-down ratios, enabling the direct conversion from 12-V or 24-V inputs to low-voltage rails for reduced system complexity and cost. The LM25143 continues to operate during input voltage dips as low as 3.5 V, at nearly 100% duty cycle if needed.

The 15-µA no-load quiescent current with the output voltage in regulation extends operating run-time in battery-powered systems. Power the LM25143 from the output of the switching regulator or another available source for even lower input quiescent current and power loss.

The LM25143 is a 42-V DC/DC synchronous buck controller for high-current single or dual outputs. Deriving from a family of wide-VIN range controllers, the device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output current. A high-side switch minimum on time of 65 ns provides large step-down ratios, enabling the direct conversion from 12-V or 24-V inputs to low-voltage rails for reduced system complexity and cost. The LM25143 continues to operate during input voltage dips as low as 3.5 V, at nearly 100% duty cycle if needed.

The 15-µA no-load quiescent current with the output voltage in regulation extends operating run-time in battery-powered systems. Power the LM25143 from the output of the switching regulator or another available source for even lower input quiescent current and power loss.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM25143 3.5-V to 42-V Dual Synchronous Buck DC/DC Controller With Ultra-Low IQ datasheet PDF | HTML 18 Mär 2022
Application note How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck PDF | HTML 16 Aug 2023
Functional safety information LM25143 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 17 Feb 2022
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators 21 Apr 2021
Application note LM5143-Q1 4-phase Buck Regulator Design (Rev. A) PDF | HTML 28 Apr 2020

Design und Entwicklung

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

Evaluierungsplatine

LM5143-Q1EVM-2100 — Evaluierungsmodul für synchronen Zwei-Kanal-Abwärtscontroller für die Automobilindustrie

The LM5143-Q1-EVM2100 high density evaluation module (EVM) is designed to showcase the performance of the LM5143-Q1 high performance, dual-channel, automotive synchronous buck DC/DC buck controller. It operates over a wide input voltage range of 3.5 V to 36 V to deliver fixed 5-V and 3.3-V outputs (...)
Benutzerhandbuch: PDF
Berechnungstool

LM5143DESIGN-CALC LM5143-Q1 Controller Quickstart Design Tool

This stand-alone tool facilitates and assists with the design of a DC/DC buck regulator based on the LM5143-Q1 synchronous buck DC/DC controller with low IQ. The user can expeditiously arrive at an optimized design to meet the application requirements.

Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
AC/DC- und DC/DC-Controller (externer FET)
LM25143 Stapelbarer synchroner DC/DC-Abwärts-Controller, 3,5 bis 42 V, mit extrem niedrigem IQ und zwei Ausg LM25143-Q1 Stapelbarer synchroner DC/DC-Abwärts-Controller, 3,5 bis 42 V, mit niedrigem IQ und zwei Ausgängen f LM5143 Stapelbarer synchroner DC/DC-Abwärts-Controller, 3,5 bis 65 V, mit extrem niedrigem IQ und zwei Ausg LM5143-Q1 3,5-V bis 65-V niedriger Iq, dualer, 2-phasiger, synchroner Abwärts-DC-DC-Controller LM5143A-Q1 Stapelbarer synchroner DC/DC-Abwärts-Controller, 3,5 bis 65 V, mit niedrigem IQ und zwei Ausgängen f
Hardware-Entwicklung
Evaluierungsplatine
LM5143-Q1EVM-2100 Evaluierungsmodul für synchronen Zwei-Kanal-Abwärtscontroller für die Automobilindustrie
Software
Berechnungstool
LM5143DESIGN-CALC LM5143-Q1 Controller-Schnellstart-Design-Tool
Referenzdesigns

PMP31202 — Referenzdesign für Vier-Phasen-Abwärtswandler (700 W)

Bei diesem Referenzdesign handelt es sich um einen 700-W-Abwärtswandler, der den Baustein LM5143A-Q1 verwendet. Dank geringer Totzeiten, ultrastarker Treiber und der Möglichkeit, die ansteigenden und abfallenden Flanken individuell einzustellen, ergibt sich ein Wirkungsgrad von 98 %. Wegen der (...)
Test report: PDF
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
VQFN (RHA) 40 Ultra Librarian

Bestellen & Qualität

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

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