Inicio Gestión de la energía Controladores CA/CC y CC/CC (FET externo)
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Gestión de la energía
Controladores CA/CC y CC/CC (FET externo)

LM5119

ACTIVO

Controlador reductor síncrono doble con modo de corriente de Vin amplia de 5.5 V-65 V

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LM5119

ACTIVO
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Detalles del producto

Vin (min) (V) 5.5 Vin (max) (V) 65 Iout (max) (A) 15 Operating temperature range (°C) -40 to 125 Control mode current mode Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 64 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 6000 Duty cycle (max) (%) 98 Number of phases 2
Vin (min) (V) 5.5 Vin (max) (V) 65 Iout (max) (A) 15 Operating temperature range (°C) -40 to 125 Control mode current mode Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 64 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 6000 Duty cycle (max) (%) 98 Number of phases 2
WQFN (RTV) 32 25 mm² 5 x 5
  • Emulated Peak Current Mode Control
  • Wide Operating Range (5.5 V to 65 V)
  • Easily Configurable for Dual Outputs or Interleaved Single Output
  • Robust 3.3-A Peak Gate Drive
  • Switching Frequency Programmable to 750 kHz
  • Optional Diode Emulation Mode
  • Programmable Output from 0.8 V
  • Precision 1.5% Voltage Reference
  • Programmable Current Limit
  • Hiccup Mode Overload Protection
  • Programmable Soft-Start
  • Programmable Line Undervoltage Lockout
  • Automatic Switch-Over to External Bias Supply
  • Channel2 Enable Logic Input
  • Thermal Shutdown
  • Leadless 32-Pin WQFN Package
  • Emulated Peak Current Mode Control
  • Wide Operating Range (5.5 V to 65 V)
  • Easily Configurable for Dual Outputs or Interleaved Single Output
  • Robust 3.3-A Peak Gate Drive
  • Switching Frequency Programmable to 750 kHz
  • Optional Diode Emulation Mode
  • Programmable Output from 0.8 V
  • Precision 1.5% Voltage Reference
  • Programmable Current Limit
  • Hiccup Mode Overload Protection
  • Programmable Soft-Start
  • Programmable Line Undervoltage Lockout
  • Automatic Switch-Over to External Bias Supply
  • Channel2 Enable Logic Input
  • Thermal Shutdown
  • Leadless 32-Pin WQFN Package

The LM5119 device is a dual synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control using an emulated current ramp. Current mode control provides inherent line feedforward, cycle-by-cycle current limiting and ease-of-loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The switching frequency is programmable from 50 kHz to 750 kHz. The LM5119 device drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator with automatic switch-over to external bias further improves efficiency. Additional features include thermal shutdown, frequency synchronization, cycle-by-cycle and hiccup mode current limit and adjustable line undervoltage lockout. The device is available in a power enhanced leadless 32-pin WQFN package featuring an exposed die attach pad to aid thermal dissipation.

The LM5119 device is a dual synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control using an emulated current ramp. Current mode control provides inherent line feedforward, cycle-by-cycle current limiting and ease-of-loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The switching frequency is programmable from 50 kHz to 750 kHz. The LM5119 device drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator with automatic switch-over to external bias further improves efficiency. Additional features include thermal shutdown, frequency synchronization, cycle-by-cycle and hiccup mode current limit and adjustable line undervoltage lockout. The device is available in a power enhanced leadless 32-pin WQFN package featuring an exposed die attach pad to aid thermal dissipation.
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Documentación técnica

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* Data sheet LM5119 Wide Input Range Dual Synchronous Buck Controller datasheet (Rev. I) PDF | HTML 29 ene 2018
Analog Design Journal Control-Mode Quick Reference Guide (Rev. B) PDF | HTML 29 ago 2023
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 10 abr 2019
White paper Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) 03 jul 2018
More literature LM5119, LM25119 Quick Start Calculator (Rev. B) 03 feb 2017
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 21 jul 2016
Technical article Power Tips: The ground plane – a critical element in noise management of switching PDF | HTML 19 ago 2015
Technical article Power Tips: Design considerations for a four-phase 1,200W synchronous buck – part PDF | HTML 15 jul 2015
Technical article Power Tips: Four-phase, 1.2-kW design achieves high efficiency at higher currents PDF | HTML 10 jun 2015
White paper Power Management IC (PMIC) Guide for Automotive (Rev. A) 29 oct 2014
More literature LM5119 and LM25119 Design tool 26 feb 2014
White paper Wide VIN power management ICs simplify white paper (Rev. A) 19 sep 2013
User guide AN-2065 LM5119 Evaluation Board (Rev. B) 24 abr 2013
User guide AN-2103 LM5117 Evaluation Board (Rev. B) 24 abr 2013
Analog Design Journal 1Q 2012 Issue Analog Applications Journal 31 ene 2012
Analog Design Journal Benefits of a multiphase buck converter 31 ene 2012

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

LM5119EVAL — Placa de evaluación LM5119 para controlador reductor síncrono doble de Vin amplia

The LM5119EVAL evaluation board provides the design engineer with a fully functional dual output buck converter, employing the LM5119 Dual Emulated Current Mode Synchronous Buck Controller. The evaluation board is designed to provide both 10V and 5V outputs over an input range of 14V to 55V. Also (...)

Guía del usuario: PDF
No disponible en TI.com
Modelo de simulación

LM5119 PSpice Transient Model

SNVM383.ZIP (227 KB) - PSpice Model
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Modelo de simulación

LM5119 Unencrypted PSpice Transient Model

SNVM961.ZIP (4 KB) - PSpice Model
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Herramienta de cálculo

LM25119-5119QUICK-CALC — Calculadora de inicio rápido LM(2)5119

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Diseños de referencia

PMP9227 — El reductor síncrono de alta tensión de entrada proporciona dos salidas independientes de 28 V a 2 A

The LM5119 controller allows the user to have two separate regulated outputs or the capability to combine the outputs (of the same voltage) into a two-phase regulator. This design operates from a 36V - 51V input and regulates 28V@2A (with transients up to 7A) and 16V@4A (with transients up to 6A).
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP30464 — Diseño de referencia de convertidor buck doble intercalado de 96 W/180 W de pico para aplicaciones c

This is a dual, interleaved buck converter reference design, which covers an input voltage range of 17.0 V to 60.0 V. The output voltage is 12.0 V with a maximum load current of 15.0 A. The design has been space optimized and supports an average load current of 8.0 A.
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP20804 — Diseño de referencia de convertidor buck sincrónico de cuarto de ladrillo para servidor de sistemas

PMP20804 is a dual-phase synchronous buck converter reference design utilizing the LM5119 dual synchronous buck controller I.C. The design accepts an input voltage of 20V to 40V and provides a 12V output capable of supplying 33A of current to the load. This represents a power density design (...)
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP30168 — Diseño de referencia de buck sincrónico de 280 W para sector automotriz con entrada de 24 VCC y sali

This 280W two phase synchronous buck converter for automotive applications is designed for a nominal input voltage of 24V to 28V with support for cranking (down to 18V) and load dump < 58V. It provides up to 20A output current at an output voltage of 12 to 14V, which can be set externally (...)
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP10260 — Diseño de referencia de entrada de 24 Vcc (doble batería de auto) de sincronización multifásica de a

This high-efficiency, high-power reference design uses the LM5119 two-phase synchronous-buck controller to regulate 14.4V at 60A. This design can be used to supply single car battery power from a double battery system, often found in trucks. Features include input EMI filtering, output hot swap (...)
Test report: PDF
Esquema: PDF
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WQFN (RTV) 32 Ultra Librarian
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Pedidos y calidad

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  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
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