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LMR51440-Q1

AKTIV

Synchroner Abwärtswandler, 36 V, 4 A, mit extrem geringem Ruhestrom für die Automobilindustrie

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Datenblatt

LMR51440-Q1

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Rating Automotive Operating temperature range (°C) -40 to 125 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 4 Vin (min) (V) 4 Vin (max) (V) 38 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Light Load Efficiency, Power good, Spread Spectrum, Synchronous Rectification, UVLO adjustable Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 28 Iq (typ) (µA) 25 Duty cycle (max) (%) 97.4
Rating Automotive Operating temperature range (°C) -40 to 125 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 4 Vin (min) (V) 4 Vin (max) (V) 38 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Light Load Efficiency, Power good, Spread Spectrum, Synchronous Rectification, UVLO adjustable Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 28 Iq (typ) (µA) 25 Duty cycle (max) (%) 97.4
WSON (DRR) 12 9 mm² 3 x 3
  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional Safety-Capable
  • Supports automotive system requirements:
    • Wide input voltage range: 4V to 36V
    • 4A or 5A continuous output current
    • ±1.0% tolerance voltage reference at room temperature
    • Minimum switching-on time: 75ns (typical)
    • Low quiescent current: 25µA
    • Adjustable frequency: 200kHz to 1MHz
    • Frequency spread spectrum
    • 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
  • Small design size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • WSON-12 package
  • PFM and FPWM options in pin-to-pin compatible package
  • Create a custom design using the LMR514x0-Q1 with the WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional Safety-Capable
  • Supports automotive system requirements:
    • Wide input voltage range: 4V to 36V
    • 4A or 5A continuous output current
    • ±1.0% tolerance voltage reference at room temperature
    • Minimum switching-on time: 75ns (typical)
    • Low quiescent current: 25µA
    • Adjustable frequency: 200kHz to 1MHz
    • Frequency spread spectrum
    • 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
  • Small design size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • WSON-12 package
  • PFM and FPWM options in pin-to-pin compatible package
  • Create a custom design using the LMR514x0-Q1 with the WEBENCH Power Designer

The LMR514x0-Q1 is a wide-VIN, easy-to-use, synchronous buck converter capable of driving up to 4A or 5A load current. With a wide input range of 4V to 36V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR514x0-Q1 features adjustable switching frequency from 200kHz to 1MHz with an external resistor, which provides the flexibility to optimize either efficiency or external component size. The device has pulse frequency modulation (PFM version) to realize high efficiency at light load, and forced pulse width modulation (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-Q1 is available in a WSON-12 package.

The LMR514x0-Q1 is a wide-VIN, easy-to-use, synchronous buck converter capable of driving up to 4A or 5A load current. With a wide input range of 4V to 36V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR514x0-Q1 features adjustable switching frequency from 200kHz to 1MHz with an external resistor, which provides the flexibility to optimize either efficiency or external component size. The device has pulse frequency modulation (PFM version) to realize high efficiency at light load, and forced pulse width modulation (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-Q1 is available in a WSON-12 package.
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* Data sheet LMR514x0-Q1 36V, 4A / 5A , Automotive, Synchronous Buck Converter With Low IQ datasheet PDF | HTML 20 Aug 2024
Functional safety information LMR51440-Q1 and LMR51450-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 13 Aug 2024

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 (...)
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