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AC/DC- und DC/DC-Wandler (integrierter FET)

LMR51450

AKTIV

Synchroner 5-A-Abwärtswandler, 36 V

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Datenblatt

LMR51450

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 5 Vin (min) (V) 4 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1100 Features Enable, Fixed Output, Forced PWM, Light Load Efficiency, Power good, Soft Start Fixed, Synchronous Rectification, UVLO Fixed Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 34 Iq (typ) (A) 0.000025
Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 5 Vin (min) (V) 4 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1100 Features Enable, Fixed Output, Forced PWM, Light Load Efficiency, Power good, Soft Start Fixed, Synchronous Rectification, UVLO Fixed Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 34 Iq (typ) (A) 0.000025
WSON (DRR) 12 9 mm² 3 x 3
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • Wide Input voltage range: 4 V to 36 V
    • 4-A or 5-A continuous output current
    • ±1.0% tolerance voltage reference at room temperature
    • Minimum switching-on time: 75 ns (typical)
    • Low Quiescent current: 25 µA
    • Adjustable Frequency: 200 kHz to 1.1 MHz
    • Frequency spread spectrum (PFM variant)
    • Protection features
      • Precision enable input
      • Open-drain PGOOD
      • VIN undervoltage lockout (UVLO)
      • Cycle-by-cycle current limiting
      • Short-circuit protection with hiccup mode
      • Thermal shutdown
    • Low dropout mode operation
    • Junction temperature range: –40°C to 150°C
  • Small solution size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • WSON-12 package
  • Various options in pin-to-pin compatible package
    • PFM and forced PWM (FPWM) options
  • Create a custom design using the LMR5144x0 with the WEBENCH® Power Designer
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • Wide Input voltage range: 4 V to 36 V
    • 4-A or 5-A continuous output current
    • ±1.0% tolerance voltage reference at room temperature
    • Minimum switching-on time: 75 ns (typical)
    • Low Quiescent current: 25 µA
    • Adjustable Frequency: 200 kHz to 1.1 MHz
    • Frequency spread spectrum (PFM variant)
    • Protection features
      • Precision enable input
      • Open-drain PGOOD
      • VIN undervoltage lockout (UVLO)
      • Cycle-by-cycle current limiting
      • Short-circuit protection with hiccup mode
      • Thermal shutdown
    • Low dropout mode operation
    • Junction temperature range: –40°C to 150°C
  • Small solution size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • WSON-12 package
  • Various options in pin-to-pin compatible package
    • PFM and forced PWM (FPWM) options
  • Create a custom design using the LMR5144x0 with the WEBENCH® Power Designer

The LMR514x0 is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 4-A or 5-A load current. With a wide input range of 4 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR514x0 features adjustable switching frequency from 200 kHz to 1.1 MHz with an external resistor, which provides the flexibility to optimize either efficiency or external component size. The device has PFM version to realize high efficiency at light load and FPWM version to achieve constant frequency, and small output voltage ripple over the full load range. Soft-start and compensation circuits are implemented internally which allows the device to be used with minimum external components.

The device has built-in protection features, such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR514x0 is available in WSON-12 package.

The LMR514x0 is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 4-A or 5-A load current. With a wide input range of 4 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR514x0 features adjustable switching frequency from 200 kHz to 1.1 MHz with an external resistor, which provides the flexibility to optimize either efficiency or external component size. The device has PFM version to realize high efficiency at light load and FPWM version to achieve constant frequency, and small output voltage ripple over the full load range. Soft-start and compensation circuits are implemented internally which allows the device to be used with minimum external components.

The device has built-in protection features, such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR514x0 is available in WSON-12 package.
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Technische Dokumentation

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Typ Titel Datum
* Data sheet LMR514x0, 36-V, 4-A/5-A Synchronous Step-Down DC/DC Converter With Low IQ datasheet PDF | HTML 05 Dez 2022
EVM User's guide LMR51450 EVM User's Guide (Rev. A) PDF | HTML 22 Nov 2022
Functional safety information LMR51440 and LMR51450 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 21 Nov 2022
Certificate LMR51450EVM EU RoHS Declaration of Conformity (DoC) 06 Sep 2022

Design und Entwicklung

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Evaluierungsplatine

LMR51450EVM — Evaluierungsmodul für synchronen LMR51450 Abwärtswandler

Das Evaluierungsmodul LMR51450 (EVM) unterstützt Kunden bei der Evaluierung der Leistung des synchronen Abwärtsspannungswandlers LMR51450. Dieses EVM implementiert den LMR51450 in einem 12-poligen WSON-Gehäuse. Das EVM kann eine Ausgangsspannung von 5 V oder 3,3 V und einen Laststrom von bis zu 5 (...)
Benutzerhandbuch: PDF | HTML
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Simulationsmodell

LMR51450 PSpice Transient Model

SNVMCB2.ZIP (2175 KB) - PSpice Model
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Berechnungstool

LMR51450-CALC — LMR51450 calculation tool

Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
AC/DC- und DC/DC-Wandler (integrierter FET)
LMR51450 — Synchroner 5-A-Abwärtswandler, 36 V
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Design guide: PDF
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WSON (DRR) 12 Optionen anzeigen
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Bestellen & Qualität

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