Inicio Gestión de la energía Convertidores de CA/CC y CC/CC (FET integrado)
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Gestión de la energía
Convertidores de CA/CC y CC/CC (FET integrado)

LMR36503

ACTIVO

Convertidor buck síncrono ultrapequeño de 3 V a 65 V, 0,3 A con IQ de 6 μA

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LMR36503

ACTIVO
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Detalles del producto

Rating Catalog Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 0.3 Vin (min) (V) 3 Vin (max) (V) 65 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Fixed Output, Forced PWM, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging Control mode current mode Vout (min) (V) 1 Vout (max) (V) 60 Iq (typ) (µA) 7 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 0.3 Vin (min) (V) 3 Vin (max) (V) 65 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Fixed Output, Forced PWM, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging Control mode current mode Vout (min) (V) 1 Vout (max) (V) 60 Iq (typ) (µA) 7 Duty cycle (max) (%) 98
VQFN-HR (RPE) 9 4 mm² 2 x 2
  • Designed for rugged industrial applications:
    • Junction temperature range –40°C to +150°C
    • Input transient protection up to 70 V
    • Wide input voltage range: 3.0 V (falling threshold) to 65 V
    • Low EMI and minimized switch node ringing
    • Adjustable, 5-V fixed output voltage options available
  • Suited for scalable industrial power supplies:
    • Pin compatible with LMR36506 (65 V, 600 mA)
    • Adjustable switching frequency: 200 kHz to 2.2 MHz with RT pin variant
  • Minimized solution size and cost:
    • Highest power density with internal compensation and reduced external component count
    • Ultra-small, 2-mm × 2-mm HotRod™ package with wettable flanks available
  • High efficiency across load range with low power dissipation:
    • > 90% peak efficiency at 1 MHz (5 VOUT adjustable)
  • Ultra-low operating quiescent current at no load
    • 4 µA at 24 VIN to 3.3 VOUT (fixed output option)
  • Designed for rugged industrial applications:
    • Junction temperature range –40°C to +150°C
    • Input transient protection up to 70 V
    • Wide input voltage range: 3.0 V (falling threshold) to 65 V
    • Low EMI and minimized switch node ringing
    • Adjustable, 5-V fixed output voltage options available
  • Suited for scalable industrial power supplies:
    • Pin compatible with LMR36506 (65 V, 600 mA)
    • Adjustable switching frequency: 200 kHz to 2.2 MHz with RT pin variant
  • Minimized solution size and cost:
    • Highest power density with internal compensation and reduced external component count
    • Ultra-small, 2-mm × 2-mm HotRod™ package with wettable flanks available
  • High efficiency across load range with low power dissipation:
    • > 90% peak efficiency at 1 MHz (5 VOUT adjustable)
  • Ultra-low operating quiescent current at no load
    • 4 µA at 24 VIN to 3.3 VOUT (fixed output option)

The LMR36503 is the industry smallest 65 V, 0.3 A synchronous step-down DC/DC converter in 2-mm × 2-mm HotRod package. This easy-to-use converter can handle input voltage transients up to 70 V, provide excellent EMI performance and support fixed 5 V and other adjustable output voltages. The transient tolerance reduces the necessary design effort to protect against input overvoltage and meets the surge immunity requirements of IEC 61000-4-5.

The LMR36503 uses the peak current mode control architecture with internal compensation to maintain stable operation with minimal output capacitance. The LMR36503 with the right resistor selection from the RT pin to ground can be externally programmed to any desired switching frequency of operation over a wide range from 200 kHz to 2.2 MHz. The precision EN/UVLO feature allows precise control of the device during the start-up and shutdown. The power-good flag, with built-in glitch filter and delayed release, offers a true indication of the system status, eliminating the requirement for an external supervisor. The compact solution size and rich feature set of LMR36503 simplifies implementation for a wide range of industrial applications.

The LMR36503 is the industry smallest 65 V, 0.3 A synchronous step-down DC/DC converter in 2-mm × 2-mm HotRod package. This easy-to-use converter can handle input voltage transients up to 70 V, provide excellent EMI performance and support fixed 5 V and other adjustable output voltages. The transient tolerance reduces the necessary design effort to protect against input overvoltage and meets the surge immunity requirements of IEC 61000-4-5.

The LMR36503 uses the peak current mode control architecture with internal compensation to maintain stable operation with minimal output capacitance. The LMR36503 with the right resistor selection from the RT pin to ground can be externally programmed to any desired switching frequency of operation over a wide range from 200 kHz to 2.2 MHz. The precision EN/UVLO feature allows precise control of the device during the start-up and shutdown. The power-good flag, with built-in glitch filter and delayed release, offers a true indication of the system status, eliminating the requirement for an external supervisor. The compact solution size and rich feature set of LMR36503 simplifies implementation for a wide range of industrial applications.
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Documentación técnica

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* Data sheet LMR36503 3-V to 65-V, 0.3-A Ultra-Small Synchronous Buck Converter with Ultra-Low IQ datasheet (Rev. B) PDF | HTML 08 nov 2022
Certificate LMR36503MSCEEVM EU Declaration of Conformity (DoC) 17 abr 2024
Application note Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A) PDF | HTML 26 jul 2021
Technical article Choosing buck converters and LDOs for miniature industrial automation equipment PDF | HTML 29 ene 2020
EVM User's guide LMR36503RFEVM User's Guide 03 abr 2019
Application brief Powering Drones With a Wide VIN DC-DC Converter (Rev. A) 05 feb 2019
Analog Design Journal Accurately measuring efficiency of ultralow-IQ devices 22 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

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Este BoosterPack™se diseñó para funcionar con el kit LP-AM243 TI LaunchPad™ con Sitara™ AM243x MCU. En conjunto, este diseño implementa un dispositivo maestro IO-Link de 8 puertos con temporización rápida y determinista y configuración independiente de ciclos y velocidad de bits. Este diseño se (...)

Guía del usuario: PDF
No disponible en TI.com
Placa de evaluación

LMR36503EVM — Módulo de evaluación del convertidor buck síncrono ultrapequeño de 3 V a 65 V y 0,3 A

The LMR36503 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR36503 synchronous step-down converter.
Guía del usuario: PDF
No disponible en TI.com
Modelo de simulación

LMR36503R5 PSpice Unencrypted Transient Model

SNVMC52.ZIP (233 KB) - PSpice Model
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Modelo de simulación

LMR36503RF Unencrypted PSpice Transient Model

SNVMC45.ZIP (226 KB) - PSpice Model
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Modelo de simulación

LMR36506R PSpice Unencrypted Transient Model

SNVMBW4.ZIP (166 KB) - PSpice Model
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Herramienta de cálculo

LMR36503E-Q1-CALC — LMR36503, LMR36503-Q1, LMR36503E-Q1 converter quickstart tool

Welcome to the quickstart design tool for the LMR36503, LMR36503-Q1, and LMR36503E-Q1. This tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the above converter family to meet application requirements.
Productos y hardware compatibles

Productos y hardware compatibles

Productos
Convertidores de CA/CC y CC/CC (FET integrado)
LMR36503E-Q1 — Convertidor automotor buck de 3 V a -65 V y 0.3 A LMR36503 — Convertidor buck síncrono ultrapequeño de 3 V a 65 V, 0,3 A con IQ de 6 μA LMR36503-Q1 — Convertidor buck de 3 V a 65 V, 0,3 A de grado automotriz, optimizado para el tamaño y la eficien
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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFN-HR (RPE) 9 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

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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