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LV5144

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Controlador reductor síncrono de CC/CC de 95 V 

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LV5144

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Detalles del producto

Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 95 Vin (min) (V) 6 Vout (max) (V) 60 Vout (min) (V) 0.8 Control mode Voltage mode Features Adjustable current limit, Enable, Light Load Efficiency, Load Disconnect, Output discharge, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable Duty cycle (max) (%) 99 Iq (typ) (A) 0.002 Number of phases 1 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 95 Vin (min) (V) 6 Vout (max) (V) 60 Vout (min) (V) 0.8 Control mode Voltage mode Features Adjustable current limit, Enable, Light Load Efficiency, Load Disconnect, Output discharge, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable Duty cycle (max) (%) 99 Iq (typ) (A) 0.002 Number of phases 1 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
VQFN (RGY) 20 15.75 mm² (4.5 mm × 3.5 mm)
    • Device temperature grade 1: –40°C to +125°C ambient temperature range
  • Versatile synchronous buck DC/DC controller
    • 6-V to 95-V wide input voltage range
    • 125°C maximum junction temperature
    • 0.8-V reference with ±1% feedback accuracy
    • 0.8-V to 60-V adjustable output voltage
    • 45-ns t ON(min) for high V IN / V OUT ratio
    • 145-ns t OFF(min) for low dropout
    • Lossless R DS(on) or shunt current sensing
    • Optimized for CISPR 11 and CISPR 32 Class B EMI requirements
  • 100-kHz to 1-MHz switching frequency
    • SYNC in and SYNC out capability
    • Selectable diode emulation or FPWM
  • 7.5-V gate drivers for standard V TH 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
    • Device temperature grade 1: –40°C to +125°C ambient temperature range
  • Versatile synchronous buck DC/DC controller
    • 6-V to 95-V wide input voltage range
    • 125°C maximum junction temperature
    • 0.8-V reference with ±1% feedback accuracy
    • 0.8-V to 60-V adjustable output voltage
    • 45-ns t ON(min) for high V IN / V OUT ratio
    • 145-ns t OFF(min) for low dropout
    • Lossless R DS(on) or shunt current sensing
    • Optimized for CISPR 11 and CISPR 32 Class B EMI requirements
  • 100-kHz to 1-MHz switching frequency
    • SYNC in and SYNC out capability
    • Selectable diode emulation or FPWM
  • 7.5-V gate drivers for standard V TH 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

The LV5144 95-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 45 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 design cost. The LV5144 continues to operate during input voltage dips as low as 6 V, at nearly 100% duty cycle if needed, making an excellent choice for high-performance industrial controls, robotics, datacom, and RF applications.

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 LV5144 95-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 45 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 design cost. The LV5144 continues to operate during input voltage dips as low as 6 V, at nearly 100% duty cycle if needed, making an excellent choice for high-performance industrial controls, robotics, datacom, and RF applications.

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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* Hoja de datos LV5144 95-V, Synchronous, BuckDC/DCController With Wide Duty Cycle Range datasheet PDF | HTML 17/08/2023

Diseño y desarrollo

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Placa de evaluación

LM5146-Q1-EVM12V — Módulo de evaluación de controlador reductor síncrono

El módulo de evaluación (EVM) de alta densidad LM5146-Q1-EVM12V está diseñado para mostrar el rendimiento del controlador buck CC-CC sincrónico LM5146-Q1 de alto rendimiento con un amplio rango de tensión de entrada. El diseño está empaquetado en un espacio reducido con un bajo número de (...)

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