Startseite Energiemanagement AC/DC- und DC/DC-Wandler (integrierter FET)
NEU

LMQ644A2-Q1

AKTIV

Synchron-Abwärtswandler mit zwei Ausgängen für die Automobilindustrie, 36 V, 12 A, geringer Ruhestro

Produktdetails

Rating Automotive Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 12 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 2.2, 2200 Features Enable, Frequency synchronization, Over Current Protection, Power good, Spread Spectrum, Synchronous Rectification, Wettable flanks package Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 20 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
Rating Automotive Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 12 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 2.2, 2200 Features Enable, Frequency synchronization, Over Current Protection, Power good, Spread Spectrum, Synchronous Rectification, Wettable flanks package Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 20 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
VQFN-FCRLF (RXA) 24 20 mm² 5 x 4
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Operation up to 150°C junction temperature
  • Functional Safety-Capable
  • Designed for Low EMI
    • Symmetrical input voltage pins with > 1mm clearance to ground
    • Four 22nF integrated VIN to GND bypass capacitors
      • Two bypass capacitors placed in series between each VIN and GND for high reliability
    • Pin selectable spread spectrum option
    • Pin selectable FPWM or auto mode operation
    • Enhanced HotRod™ QFN (25) package with wettable flanks
    • Switching frequency from 100kHz to 2.2MHz
    • Meets CISPR 25 class 5 EMI requirements
  • Single and dual-output features
    • Wide input voltage range of 3V to 36V
    • 1% accurate fixed 3.3V, 5V or adjustable outputs from 0.8V to 20V
    • Hiccup-mode overcurrent protection and thermal shutdown protection with hysteresis
    • Precision ENABLE and PGOOD functions
    • 50ns tON(min) for high VIN / VOUT ratio
    • 80ns tOFF(min) for low dropout
  • Versatile dual-output operation
    • Shutdown mode current: 0.5µA typical
    • No-load standby current: 9µA typical
    • Built-in compensation and 3ms soft start
    • Independent precision ENABLE and PGOOD
  • Adaptable single-output operation
    • > 95% efficient for an 8A load, single output, VIN =12V, VOUT = 5V
    • External compensation and adjustable soft start
    • PGOOD, SYNCIN, and SYNCOUT functions
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Operation up to 150°C junction temperature
  • Functional Safety-Capable
  • Designed for Low EMI
    • Symmetrical input voltage pins with > 1mm clearance to ground
    • Four 22nF integrated VIN to GND bypass capacitors
      • Two bypass capacitors placed in series between each VIN and GND for high reliability
    • Pin selectable spread spectrum option
    • Pin selectable FPWM or auto mode operation
    • Enhanced HotRod™ QFN (25) package with wettable flanks
    • Switching frequency from 100kHz to 2.2MHz
    • Meets CISPR 25 class 5 EMI requirements
  • Single and dual-output features
    • Wide input voltage range of 3V to 36V
    • 1% accurate fixed 3.3V, 5V or adjustable outputs from 0.8V to 20V
    • Hiccup-mode overcurrent protection and thermal shutdown protection with hysteresis
    • Precision ENABLE and PGOOD functions
    • 50ns tON(min) for high VIN / VOUT ratio
    • 80ns tOFF(min) for low dropout
  • Versatile dual-output operation
    • Shutdown mode current: 0.5µA typical
    • No-load standby current: 9µA typical
    • Built-in compensation and 3ms soft start
    • Independent precision ENABLE and PGOOD
  • Adaptable single-output operation
    • > 95% efficient for an 8A load, single output, VIN =12V, VOUT = 5V
    • External compensation and adjustable soft start
    • PGOOD, SYNCIN, and SYNCOUT functions

The LMQ644xx-Q1 is a 36V, synchronous, buck, DC/DC converter for high-current single or dual outputs. The device uses an interleaved, stackable, current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with an output clock supporting up to 6 phases for currents up to 36A. A high-side switch minimum on-time of 50ns gives large step-down ratios, enabling the direct conversion from 12V, 24V, or automotive inputs to low-voltage rails for reduced system complexity and design cost.

The LMQ644xx-Q1 incorporates spread spectrum in an optimized enhanced HotRod QFN package, with wettable flanks, and four 22nF high frequency integrated capacitors to minimize EMI. Dual Random Spread Spectrum (DRSS) frequency hopping is set to ±10% (typical), drastically reducing emissions through a combination of triangular and pseudo-random modulation. A bias pin allows the LMQ644xx-Q1 to save losses by powering the device from the output of the converter, achieving a 9µA no-load quiescent current to extend the operating run-time in battery-powered systems. The LMQ644xx-Q1 can maintain high efficiency light-load operation even when stacking multiple devices for high efficiency over the full load range.

The LMQ644xx-Q1 is a 36V, synchronous, buck, DC/DC converter for high-current single or dual outputs. The device uses an interleaved, stackable, current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with an output clock supporting up to 6 phases for currents up to 36A. A high-side switch minimum on-time of 50ns gives large step-down ratios, enabling the direct conversion from 12V, 24V, or automotive inputs to low-voltage rails for reduced system complexity and design cost.

The LMQ644xx-Q1 incorporates spread spectrum in an optimized enhanced HotRod QFN package, with wettable flanks, and four 22nF high frequency integrated capacitors to minimize EMI. Dual Random Spread Spectrum (DRSS) frequency hopping is set to ±10% (typical), drastically reducing emissions through a combination of triangular and pseudo-random modulation. A bias pin allows the LMQ644xx-Q1 to save losses by powering the device from the output of the converter, achieving a 9µA no-load quiescent current to extend the operating run-time in battery-powered systems. The LMQ644xx-Q1 can maintain high efficiency light-load operation even when stacking multiple devices for high efficiency over the full load range.

Herunterladen Video mit Transkript ansehen Video

Technische Dokumentation

star =Von TI ausgewählte Top-Empfehlungen für dieses Produkt
Keine Ergebnisse gefunden. Bitte geben Sie einen anderen Begriff ein und versuchen Sie es erneut.
Alle anzeigen 8
Typ Titel Datum
* Data sheet LMQ644xx-Q1 3V to 36V, Low IQ , Dual 6/5/4A, Automotive Buck Converter Optimized for Power Density and Low EMI datasheet (Rev. A) PDF | HTML 08 Jul 2024
Technical article Four power supply challenges in ADAS front camera designs PDF | HTML 05 Jan 2024
EVM User's guide LMQ644A2QEVM-D2100 36-V, Dual, 6-A Outputs, Synchronous, Buck Converter PDF | HTML 10 Jul 2023
EVM User's guide LMQ644A2QEVM-S2100 36-V, 12-A, Single-Output, Dual- Phase, Synchronous Buck PDF | HTML 10 Jul 2023
User guide LMQ644A2-Q1 6-Phase Buck Regulator Design for Automotive ADAS Applications PDF | HTML 05 Jul 2023
Functional safety information LMQ644xx-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 27 Jun 2023
Certificate LMQ644A2QEVM-S2100 EU Declaration of Conformity (DoC) 12 Mai 2023
Certificate LMQ644A2QEVM-D2100 EU Declaration of Conformity (DoC) 11 Mai 2023

Design und Entwicklung

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

Evaluierungsplatine

LMQ644A2QEVM-D2100 — LMQ644A2-Q1-Evaluierungsmodul für synchrone Abwärtswandler mit zwei Ausgängen

Das LMQ644A2QEVM-D2100-Evaluierungsmodul (EVM) evaluiert die Funktionen und die Leistung des zweifachen DC/DC-Abwärtswandlers LMQ644A2-Q1 mit integrierten Leistungs-MOSFETs. Das EVM bietet zwei 6-A-Ausgänge. Die Ausgangsspannung kann einzeln auf eine feste Spannung von 3,3 V und 5 V programmiert (...)

Benutzerhandbuch: PDF | HTML
Evaluierungsplatine

LMQ644A2QEVM-S2100 — LMQ644A2-Q1-Evaluierungsmodul für synchrone Abwärtswandler mit einem Ausgang

Das LMQ644A2QEVM-S2100-Evaluierungsmodul (EVM) evaluiert die Funktionen und die Leistung des zweifachen DC/DC-Abwärtswandlers LMQ644A2-Q1 mit integrierten Leistungs-MOSFETs. Das EVM stellt einen Ausgang von 12 A bereit. Die Ausgangsspannung kann einzeln auf eine feste Spannung von 3,3 V und 5 V (...)

Benutzerhandbuch: PDF | HTML
Simulationsmodell

LMQ644A2 PSPICE transient model

SNVMCC1.ZIP (249 KB) - PSpice Model
Berechnungstool

LMQ644XX-DESIGN-CALC LMQ644XX quick-start design tool

This stand-alone tool facilitates and assists with the design of a DC/DC buck regulator based on the LM(Q)64480/A0/A2-Q1 dual channel buck converter. 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-Wandler (integrierter FET)
LMQ64480-Q1 Synchron-Abwärtswandler mit zwei Ausgängen für die Automobilindustrie, 36 V, 8 A, geringer Ruhestrom LMQ644A0-Q1 Synchron-Abwärtswandler mit zwei Ausgängen für die Automobilindustrie, 36 V, 10 A, geringer Ruhestro LMQ644A2-Q1 Synchron-Abwärtswandler mit zwei Ausgängen für die Automobilindustrie, 36 V, 12 A, geringer Ruhestro
Referenzdesigns

PMP41085 — Automotive 100W infotainment display module reference design with functional safety capabilities<

This reference design showcases the 100W automotive infotainment display module power reference design with cold crank, load dump and FuSa Capabilities.

The LM74900-Q1 is the first stage of the design playing a role of protection for negative input voltage, undervoltage, locked output, and (...)

Test report: PDF
Referenzdesigns

PMP23117 — Referenzdesign für vier Phasen, 3,3 V, 24 A, für Anwendungen im Automobilbereich

Dieses vierphasige Referenzdesign liefert 3,3 VOUT bei 24 A von einer 3,8-V- bis 16-V-Kfz-Stromquelle. Das Design verwendet zwei LMQ644A2-Q1 Zweikanal-Synchron-Abwärtsregler, die mit einer nominalen Schaltfrequenz von 500 kHz arbeiten. Die erzwungene Pulsweitenmodulation (FPWM) oder die (...)
Test report: PDF
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
VQFN-FCRLF (RXA) 24 Ultra Librarian

Bestellen & Qualität

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

Support und Schulungen

TI E2E™-Foren mit technischem Support von TI-Ingenieuren

Inhalte werden ohne Gewähr von TI und der Community bereitgestellt. Sie stellen keine Spezifikationen von TI dar. Siehe Nutzungsbedingungen.

Bei Fragen zu den Themen Qualität, Gehäuse oder Bestellung von TI-Produkten siehe TI-Support. ​​​​​​​​​​​​​​

Videos