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AC/DC 和 DC/DC 轉換器 (整合式 FET)

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 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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類型 標題 日期
* 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 2022年 11月 8日
Certificate LMR36503MSCEEVM EU Declaration of Conformity (DoC) 2024年 4月 17日
Application note Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A) PDF | HTML 2021年 7月 26日
Technical article Choosing buck converters and LDOs for miniature industrial automation equipment PDF | HTML 2020年 1月 29日
EVM User's guide LMR36503RFEVM User's Guide 2019年 4月 3日
Application brief Powering Drones With a Wide VIN DC-DC Converter (Rev. A) 2019年 2月 5日
Analog Design Journal Accurately measuring efficiency of ultralow-IQ devices 2014年 1月 22日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

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。

使用指南: PDF
TI.com 無法提供
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

The LMR36503 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR36503 synchronous step-down converter.
使用指南: PDF
TI.com 無法提供
模擬型號

LMR36503R5 PSpice Unencrypted Transient Model

SNVMC52.ZIP (233 KB) - PSpice Model
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模擬型號

LMR36503RF Unencrypted PSpice Transient Model

SNVMC45.ZIP (226 KB) - PSpice Model
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模擬型號

LMR36506R PSpice Unencrypted Transient Model

SNVMBW4.ZIP (166 KB) - PSpice Model
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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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產品
AC/DC 和 DC/DC 轉換器 (整合式 FET)
LMR36503E-Q1 — 車用 3V 至 65V 0.3A 降壓轉換器 LMR36503 — 具有 6μA IQ 的 3V 至 65V、0.3A 超小型同步降壓轉換器 LMR36503-Q1 — 針對尺寸和輕負載效率最佳化的汽車 3-V 至 65-V、0.3-A 降壓轉換器
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VQFN-HR (RPE) 9 Ultra Librarian
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