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AC/DC & DC/DC controllers (external FET)

LM25118

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Controlador elevador-reductor no síncrono con modo de corriente y entrada de tensión amplia de 3-42 

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LM25118

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Detalles del producto

Vin (min) (V) 3 Vin (max) (V) 42 Iout (max) (A) 10 Operating temperature range (°C) -40 to 125 Topology Buck-Boost Rating Catalog Vout (min) (V) 1.23 Vout (max) (V) 38 Iq (typ) (A) 0.0045 Duty cycle (max) (%) 98
Vin (min) (V) 3 Vin (max) (V) 42 Iout (max) (A) 10 Operating temperature range (°C) -40 to 125 Topology Buck-Boost Rating Catalog Vout (min) (V) 1.23 Vout (max) (V) 38 Iq (typ) (A) 0.0045 Duty cycle (max) (%) 98
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4
  • Input Voltage Operating Range From 3 V to 42 V
  • Emulated Peak Current Mode Control
  • Smooth Transition Between Step-Down and Step-Up Modes
  • Switching Frequency Programmable to 500 KHz
  • Oscillator Synchronization Capability
  • Internal High Voltage Bias Regulator
  • Integrated High and Low-Side Gate Drivers
  • Programmable Soft-Start Time
  • Ultra-Low Shutdown Current
  • Enable Input
  • Wide Bandwidth Error Amplifier
  • 1.5% Feedback Reference Accuracy
  • Thermal Shutdown
  • Package: 20-Pin HTSSOP (Exposed Pad)
  • Create a Custom Design Using the LM25118 With the WEBENCH® Power Designer
  • Input Voltage Operating Range From 3 V to 42 V
  • Emulated Peak Current Mode Control
  • Smooth Transition Between Step-Down and Step-Up Modes
  • Switching Frequency Programmable to 500 KHz
  • Oscillator Synchronization Capability
  • Internal High Voltage Bias Regulator
  • Integrated High and Low-Side Gate Drivers
  • Programmable Soft-Start Time
  • Ultra-Low Shutdown Current
  • Enable Input
  • Wide Bandwidth Error Amplifier
  • 1.5% Feedback Reference Accuracy
  • Thermal Shutdown
  • Package: 20-Pin HTSSOP (Exposed Pad)
  • Create a Custom Design Using the LM25118 With the WEBENCH® Power Designer

The LM25118 wide voltage range Buck-Boost switching regulator controller features all of the functions necessary to implement a high-performance, cost-efficient Buck-Boost regulator using a minimum of external components. The Buck-Boost topology maintains output voltage regulation when the input voltage is either less than or greater than the output voltage making it especially suitable for automotive applications. The LM25118 operates as a buck regulator while the input voltage is sufficiently greater than the regulated output voltage and gradually transitions to the buck-boost mode as the input voltage approaches the output. This dual-mode approach maintains regulation over a wide range of input voltages with optimal conversion efficiency in the buck mode and a glitch-free output during mode transitions. This easy-to-use controller includes drivers for the high-side buck MOSFET and the low-side boost MOSFET. The control method of the regulator is based upon current mode control using an emulated current ramp. Emulated current mode control reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of the very small duty cycles necessary in high input voltage applications. Additional protection features include current limit, thermal shutdown, and an enable input. The device is available in a power-enhanced, 20-pin HTSSOP package featuring an exposed die attach pad to aid thermal dissipation.

The LM25118 wide voltage range Buck-Boost switching regulator controller features all of the functions necessary to implement a high-performance, cost-efficient Buck-Boost regulator using a minimum of external components. The Buck-Boost topology maintains output voltage regulation when the input voltage is either less than or greater than the output voltage making it especially suitable for automotive applications. The LM25118 operates as a buck regulator while the input voltage is sufficiently greater than the regulated output voltage and gradually transitions to the buck-boost mode as the input voltage approaches the output. This dual-mode approach maintains regulation over a wide range of input voltages with optimal conversion efficiency in the buck mode and a glitch-free output during mode transitions. This easy-to-use controller includes drivers for the high-side buck MOSFET and the low-side boost MOSFET. The control method of the regulator is based upon current mode control using an emulated current ramp. Emulated current mode control reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of the very small duty cycles necessary in high input voltage applications. Additional protection features include current limit, thermal shutdown, and an enable input. The device is available in a power-enhanced, 20-pin HTSSOP package featuring an exposed die attach pad to aid thermal dissipation.

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Documentación técnica

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Tipo Título Fecha
* Data sheet LM25118 Wide Voltage Range Buck-Boost Controller datasheet (Rev. F) PDF | HTML 12 mar 2018
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 10 abr 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 jun 2018
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 21 jul 2016
User guide LM25118 Evaluation Board (Rev. B) 17 ene 2014

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

LM25118EVAL — Placa de evaluación LM25118 de controlador elevador-reductor de Vin amplia

The LM25118 Evaluation Board is designed to provide the design engineer with a fully functional, Emulated Current Mode Control, buck boost power converter to evaluate the LM25118 controller IC. The evaluation board provides a 12V output with 3A of output current capability. The evaluation board’s (...)

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

LM25118 PSpice Transient Model (Rev. A)

SNVM212A.ZIP (74 KB) - PSpice Model
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Modelo de simulación

LM25118 TINA-TI Load Transient Reference Design

SNVM502.TSC (152 KB) - TINA-TI Reference Design
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Modelo de simulación

LM25118 TINA-TI Startup Transient Reference Design

SNVM501.TSC (174 KB) - TINA-TI Reference Design
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Modelo de simulación

LM25118 TINA-TI Transient Spice Model

SNVM500.ZIP (28 KB) - TINA-TI Spice Model
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Modelo de simulación

LM25118 Unencrypted PSpice Transient Model

SNVMAJ9.ZIP (4 KB) - PSpice Model
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Herramienta de cálculo

LM5118QUICK-CALC — LM5118/LM25118 Quick Start Component Calculator

Quick Start Component Calculator for LM5118/LM25118 devices
Productos y hardware compatibles

Productos y hardware compatibles

Productos
AC/DC & DC/DC controllers (external FET)
LM25118 — Controlador elevador-reductor no síncrono con modo de corriente y entrada de tensión amplia de 3-42  LM25118-Q1 — Controlador elevador-reductor no síncrono con modo de corriente y entrada de tensión amplia de 3-42  LM5118 — Controlador elevador-reductor no síncrono con modo de corriente de Vin amplia de 3 V-75 V LM5118-Q1 — Controlador elevador-reductor no síncrono con modo de corriente de VIN amplia de 3 V a 75 V
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Diseños de referencia

PMP8637 — Diseño de referencia de reductor síncrono de 3.3 V a 125 mA

This design is a buck-boost converter for automotive applications covering an input voltage range of 3.5 .. 35V. It provides an output voltage of 5.7V @ 1.2A.
Test report: PDF
Diseños de referencia

PMP8570 — Convertidor reductor-elevador de dos interruptores con 28.0 V a 2.5 A y rango de tensión de entrada

This design is a two-switch buck boost converter which generates an output voltage of 28.0V @ 2.5A from an input voltage range of 10..32V.
Test report: PDF
Paquete Pasadores Descargar
HTSSOP (PWP) 20 Ver opciones
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Pedidos y calidad

Información incluida:
  • RoHS
  • 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
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

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