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DC/DC 轉換器

LMR36503

現行

具有 6μA IQ 的 3V 至 65V、0.3A 超小型同步降壓轉換器

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產品規格表

LMR36503

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 65 Vin (min) (V) 3 Vout (max) (V) 60 Vout (min) (V) 1 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 Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000007 Duty cycle (max) (%) 98
Rating Catalog Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 65 Vin (min) (V) 3 Vout (max) (V) 60 Vout (min) (V) 1 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 Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000007 Duty cycle (max) (%) 98
VQFN-HR (RPE) 9 4 mm² (2 mm × 2 mm)
  • 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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技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LMR36503 3-V to 65-V, 0.3-A Ultra-Small Synchronous Buck Converter with Ultra-Low IQ datasheet (Rev. B) PDF | HTML 2022/11/8
功能安全資訊 LM706A0-Q1 Functional Safety FIT Rate, FMD, and Pin FMA PDF | HTML 2024/9/19
證書 LMR36503MSCEEVM EU Declaration of Conformity (DoC) PDF | HTML 2024/4/17
應用說明 Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A) PDF | HTML 2021/7/26
技術文章 Choosing buck converters and LDOs for miniature industrial automation equipment PDF | HTML 2020/1/29
Application brief Powering Drones With a Wide VIN DC-DC Converter (Rev. A) 2019/2/5
類比設計期刊 Accurately measuring efficiency of ultralow-IQ devices 2014/1/22

設計與開發

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開發板

BOOSTXL-IOLINKM-8 — 八埠 IO-Link 主要裝置 BoosterPack™

此 BoosterPack™ 專為搭配 LP-AM243 TI LaunchPad™ 套件及 Sitara™ AM243x MCU 運作。此設計採用具快速且決定性時脈、獨立週期與位元率配置的八埠 IO-Link 主要裝置。此設計可用於建立遠端 IO 閘道，以連接 OPC UA、Profinet、EtherCAT 或乙太網路 IP。適用 Sitara™ 處理器基礎訊框處理程式的可編程即時單元 (PRU) 可提供靈活的時脈與同步控制方式。

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開發板

LMR36503EVM — 3-V 至 65-V、0.3-A 超小型同步降壓轉換器評估模組

LMR36503 評估模組 (EVM) 是完全組裝且經過測試的電路，用於評估 LMR36503 同步降壓轉換器。
使用指南: PDF
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模擬型號

LMR36503R5 PSpice Unencrypted Transient Model

SNVMC52.ZIP (233 KB) - PSpice 模型
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模擬型號

LMR36503RF Unencrypted PSpice Transient Model

SNVMC45.ZIP (226 KB) - PSpice 模型
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模擬型號

LMR36506R PSpice Unencrypted Transient Model

SNVMBW4.ZIP (166 KB) - PSpice 模型
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計算工具

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.
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VQFN-HR (RPE) 9 Ultra Librarian
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