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

LM5145-Q1

AKTIV

Synchroner DC/DC-Abwärtscontroller für die Automobilindustrie, 75 V, mit großem Arbeitsbereich

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Datenblatt

LM5145-Q1

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Vin (min) (V) 5.5 Vin (max) (V) 75 Operating temperature range (°C) -40 to 150 Control mode Voltage mode Rating Automotive Vout (min) (V) 0.8 Vout (max) (V) 60 Iq (typ) (A) 0.0018 Duty cycle (max) (%) 99 Number of phases 1
Vin (min) (V) 5.5 Vin (max) (V) 75 Operating temperature range (°C) -40 to 150 Control mode Voltage mode Rating Automotive Vout (min) (V) 0.8 Vout (max) (V) 60 Iq (typ) (A) 0.0018 Duty cycle (max) (%) 99 Number of phases 1
VQFN (RGY) 20 15.75 mm² 4.5 x 3.5
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient temperature range
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 5.5 V to 75 V
    • 150°C maximum junction temperature
    • 0.8-V reference with ±1% feedback accuracy
    • Adjustable output voltage from 0.8 V to 60 V
    • 40-ns tON(min) for high VIN / VOUT ratio
    • 140-ns tOFF(min) for low dropout
    • Lossless RDS(on) or shunt current sensing
    • Optimized for CISPR 25 Class 5 requirements
  • Switching frequency from 100 kHz to 1 MHz
    • SYNC in and SYNC out capability
    • Selectable diode emulation or FPWM
  • 7.5-V gate drivers for standard VTH MOSFETs
    • 14-ns adaptive dead-time control
    • 2.3-A source and 3.5-A sink capability
  • Inherent protection features for robust design
    • Adjustable output voltage soft start
    • Hiccup-mode overcurrent protection
    • Input UVLO with hysteresis
    • VCC and gate-drive UVLO protection
    • Precision enable input and open-drain PGOOD indicator for sequencing and control
    • Thermal shutdown protection with hysteresis
  • 20-pin VQFN package with wettable flanks
  • Create a custom design using the LM5145-Q1 with WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient temperature range
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 5.5 V to 75 V
    • 150°C maximum junction temperature
    • 0.8-V reference with ±1% feedback accuracy
    • Adjustable output voltage from 0.8 V to 60 V
    • 40-ns tON(min) for high VIN / VOUT ratio
    • 140-ns tOFF(min) for low dropout
    • Lossless RDS(on) or shunt current sensing
    • Optimized for CISPR 25 Class 5 requirements
  • Switching frequency from 100 kHz to 1 MHz
    • SYNC in and SYNC out capability
    • Selectable diode emulation or FPWM
  • 7.5-V gate drivers for standard VTH MOSFETs
    • 14-ns adaptive dead-time control
    • 2.3-A source and 3.5-A sink capability
  • Inherent protection features for robust design
    • Adjustable output voltage soft start
    • Hiccup-mode overcurrent protection
    • Input UVLO with hysteresis
    • VCC and gate-drive UVLO protection
    • Precision enable input and open-drain PGOOD indicator for sequencing and control
    • Thermal shutdown protection with hysteresis
  • 20-pin VQFN package with wettable flanks
  • Create a custom design using the LM5145-Q1 with WEBENCH Power Designer

The LM5145-Q1 75-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high-voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5145-Q1 continues to operate during input voltage dips as low as 5.5 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-power automotive DC/DC regulators, automotive motor drives, and HEV/EV power compliant to LV-148.

Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications.

The LM5145-Q1 75-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high-voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5145-Q1 continues to operate during input voltage dips as low as 5.5 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-power automotive DC/DC regulators, automotive motor drives, and HEV/EV power compliant to LV-148.

Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications.
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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM5145-Q1 Automotive 75-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range datasheet (Rev. A) PDF | HTML 08 Jun 2021
Functional safety information LM5145-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 23 Jun 2021
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators 21 Apr 2021
EVM User's guide LM5146-Q1EVM User's Guide 10 Aug 2018
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
Application brief Improve DC/DC Regulator EMI for Free with Optimized Power Stage Layout 13 Nov 2017
EVM User's guide LM5145EVM-HD-20A High Density Evaluation Module (Rev. A) 07 Jun 2017
Application note Creating a Dual USB Universal Car Charger From the TPS40170 and Two TPS2511 22 Mai 2012

Design und Entwicklung

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

Evaluierungsplatine

LM5145EVM-HD-20A — LM5145 Kompakter Synchron-Abwärtsregler mit großem VIN – Evaluierungsmodul

The LM5145EVM-HD-20A high density evaluation module (EVM) is designed to showcase the performance of the LM5145 high performance, synchronous buck DC-DC buck controller with wide input voltage range. The design is packaged in a miniature footprint with low component count. It operates over a wide (...)
Benutzerhandbuch: PDF
Nicht verfügbar auf TI.com
Evaluierungsplatine

LM5146-Q1-EVM12V — Evaluierungsmodul für synchronen Abwärtsregler

The LM5146-Q1-EVM12V high density evaluation module (EVM) is designed to showcase the performance of the LM5146-Q1 high performance, synchronous buck DC-DC buck controller with wide input voltage range. The design is packaged in a miniature footprint with low component count. It operates over a (...)

Benutzerhandbuch: PDF
Nicht verfügbar auf TI.com
Simulationsmodell

LM5145-Q1 PSpice Unencrypted Transient Model Package

SNVMC66.ZIP (301 KB) - PSpice Model
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Berechnungstool

LM5145DESIGN-CALC — LM5145 Quickstart Design Tool

Welcome to the LM5145 Quickstart Design Tool. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the LM5145 75V synchronous buck controller. As such, the user can expeditiously arrive at an optimized design to meet the (...)

Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
AC/DC & DC/DC controllers (external FET)
LM5145 — Synchroner Abwärtsregler mit großem Eingangsspannungsbereich und Tastverhältnis, 75 V LM5145-Q1 — Synchroner DC/DC-Abwärtscontroller für die Automobilindustrie, 75 V, mit großem Arbeitsbereich
Hardware-Entwicklung
Evaluierungsplatine
LM5145EVM-HD-20A — LM5145 Kompakter Synchron-Abwärtsregler mit großem VIN – Evaluierungsmodul
Software
Berechnungstool
LM5145DESIGN-CALC — LM5145 Synchron-Abwärtsregler-Designtool
Herunterladen
Leiterplatten-Layout

LM5146-Q1-EVM12V PCB Layout Files

SNVR473.ZIP (7838 KB)
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Leiterplatten-Layout

LM5145EVM-HD-20A PCB Layout Files

SNVR500.ZIP (1493 KB)
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Gehäuse Pins Herunterladen
VQFN (RGY) 20 Optionen anzeigen
Es gelten die allgemeinen Geschäftsbedingungen von TI für Evaluierungsartikel.

Bestellen & Qualität

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

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