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LV5144

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95-V synchronous DC/DC buck controller 

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Data sheet

LV5144

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 6 Vin (max) (V) 95 Iout (max) (A) 20 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 60 Features Adjustable current limit, Enable, Frequency synchronization, Load Disconnect, Output discharge, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 2000 Duty cycle (max) (%) 99 TI functional safety category Functional Safety-Capable
Vin (min) (V) 6 Vin (max) (V) 95 Iout (max) (A) 20 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 60 Features Adjustable current limit, Enable, Frequency synchronization, Load Disconnect, Output discharge, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 2000 Duty cycle (max) (%) 99 TI functional safety category Functional Safety-Capable
VQFN (RGY) 20 15.75 mm² 4.5 x 3.5
    • 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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* Data sheet LV5144 95-V, Synchronous, BuckDC/DCController With Wide Duty Cycle Range datasheet PDF | HTML 17 Aug 2023

Design & development

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Evaluation board

LM5146-Q1-EVM12V — Synchronous buck controller evaluation module

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 (...)

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VQFN (RGY) 20 Ultra Librarian
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