LMS3655

現行

5.5A、36V 同步、400kHz、降壓轉換器

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同,但引腳輸出與所比較的裝置不同
LM61460 現行 3-V 至 36-V、6-A、低 EMI 同步降壓轉換器 Smaller solution size, higher efficiency and lower EMI.
TPSM63608 現行 採用 7.5-mm x 6.5-mm HotRod™ QFN 封裝的高密度、36-V 輸入、1-V 至 20-V 輸出、6-A 電源模組 Smaller design with an integrated-inductor power module.

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 5.5 Vin (max) (V) 42 Vin (min) (V) 3.5 Vout (max) (V) 15 Vout (min) (V) 1 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Switching frequency (min) (kHz) 250 Switching frequency (max) (kHz) 500 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 15 Duty cycle (max) (%) 98 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 5.5 Vin (max) (V) 42 Vin (min) (V) 3.5 Vout (max) (V) 15 Vout (min) (V) 1 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Switching frequency (min) (kHz) 250 Switching frequency (max) (kHz) 500 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 15 Duty cycle (max) (%) 98 Type Converter
VQFN-HR (RNL) 22 20 mm² 5 x 4
  • 96% Peak Efficiency While Converting 12 V to 5 V
  • Low EMI and Switch Noise
    • Minimized Switch Node Ringing
    • Pseudo-Random Spread Spectrum
  • 400-kHz (±10%) Fixed Switching Frequency
  • –40°C to +150°C Junction Temperature Range
  • External Frequency Synchronization
  • RESET Output With Internal Filter and 3-ms Release Timer
  • Automatic Light Load Mode for Improved Efficiency
  • Pin-Selectable Forced PWM Mode
  • Built-In Compensation, Soft Start, Current Limit, Thermal Shutdown, and UVLO
  • 0.35-V Dropout With 3.5-A Load at 25°C (Typical)
  • 32-µA IQ_VIN: Quiescent Current at 3.3 VOUT and No Load (Typical)
  • 5.5-A Continuous Load Current
  • Adjustable Output Voltage (1 V to 20 V)
  • ±1.5% Reference Voltage Tolerance
  • 4-mm × 5-mm, 0.5-mm Pitch SON Package
  • 96% Peak Efficiency While Converting 12 V to 5 V
  • Low EMI and Switch Noise
    • Minimized Switch Node Ringing
    • Pseudo-Random Spread Spectrum
  • 400-kHz (±10%) Fixed Switching Frequency
  • –40°C to +150°C Junction Temperature Range
  • External Frequency Synchronization
  • RESET Output With Internal Filter and 3-ms Release Timer
  • Automatic Light Load Mode for Improved Efficiency
  • Pin-Selectable Forced PWM Mode
  • Built-In Compensation, Soft Start, Current Limit, Thermal Shutdown, and UVLO
  • 0.35-V Dropout With 3.5-A Load at 25°C (Typical)
  • 32-µA IQ_VIN: Quiescent Current at 3.3 VOUT and No Load (Typical)
  • 5.5-A Continuous Load Current
  • Adjustable Output Voltage (1 V to 20 V)
  • ±1.5% Reference Voltage Tolerance
  • 4-mm × 5-mm, 0.5-mm Pitch SON Package

The LMS3655 synchronous buck regulators are optimized for high performance applications, providing an adjustable output of 1 V to 20 V. Seamless transition between PWM and PFM modes, along with a low quiescent current, ensures high efficiency and superior transient responses at all loads.

Advanced high-speed circuitry allows the LMS3655 to regulate an input of 24 V to an output of 3.3 V at a fixed frequency of 400 kHz while also enabling a continuous load current of 5.5 A. An innovative frequency foldback architecture allows this device to regulate a 3.3-V output from an input voltage of only 3.5 V. The input voltage can range up to 36 V, with transient tolerance up to 42 V, easing input surge protection design.

An open-drain reset output, with built-in filtering and delay, provides a true indication of system status. This feature negates the requirement for an additional supervisory component, saving cost and board space.

The LMS3655 synchronous buck regulators are optimized for high performance applications, providing an adjustable output of 1 V to 20 V. Seamless transition between PWM and PFM modes, along with a low quiescent current, ensures high efficiency and superior transient responses at all loads.

Advanced high-speed circuitry allows the LMS3655 to regulate an input of 24 V to an output of 3.3 V at a fixed frequency of 400 kHz while also enabling a continuous load current of 5.5 A. An innovative frequency foldback architecture allows this device to regulate a 3.3-V output from an input voltage of only 3.5 V. The input voltage can range up to 36 V, with transient tolerance up to 42 V, easing input surge protection design.

An open-drain reset output, with built-in filtering and delay, provides a true indication of system status. This feature negates the requirement for an additional supervisory component, saving cost and board space.

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類型 標題 日期
* Data sheet LMS3655 5.5-A, 36-V Synchronous, 400-kHz DC-DC Step-Down Converter datasheet (Rev. B) PDF | HTML 2018年 3月 1日
Selection guide Buck Converter Quick Reference Guide (Rev. B) 2021年 4月 8日
EVM User's guide LMS36x5-Q1 EVM User's Guide (Rev. A) 2018年 4月 13日
Technical article Powering up the performance of sensitive test and measurement systems PDF | HTML 2017年 10月 17日
Application note Designing High Performance, Low-EMI, Automotive Power Supplies 2017年 9月 30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

LMS3655AQEVM — LMS3655-Q1 5.5A、5V 同步 400 kHz 降壓轉換器評估模組

LMS3655AQEVM 評估模組 (EVM) 展示了 LMS3655 車用整合式降壓轉換器的功能。為了達到最佳 EMI 性能,EVM 背面另設有 EMI 濾波器,有助於降低雜訊。使用者可選擇透過 VIN1/GND1 接點繞過該 EMI 濾波器。EVM 可運作的輸入電壓範圍為 3.8V 至 36V,並可承受最高 42V 的暫態電壓;它提供可調整的 5V 輸出,且支援 5.5A 連續負載。
使用指南: PDF
TI.com 無法提供
開發板

LMS3655MQEVM — LMS3655-Q1 5.5A、5V 同步 400 kHz 降壓轉換器評估模組

LMS3655MQEVM 評估模組 (EVM) 展示了 LMS3655-Q1 車用整合式降壓轉換器的功能。為了達到最佳 EMI 性能,LMS3655-Q1 內建展頻功能,EVM 背面另設有 EMI 濾波器,有助於降低雜訊。使用者可選擇透過 VIN1/GND1 接點繞過該 EMI 濾波器。EVM 可運作的輸入電壓範圍為 3.8V 至 36V,並可承受最高 42V 的暫態電壓;它提供可調整的 5V 輸出,且支援 5.5A 連續負載。
使用指南: PDF
TI.com 無法提供
參考設計

PMP40269 — USB Type-C™ DFP 5V 1.5A + USB Type-A 5V 2.4A 汽車充電器參考設計

PMP40269 為雙埠車用充電器參考設計。它具有一個 USB Type-C™ 埠和一個 USB Type-A 埠。USB Type-C 埠可為 USB Type-C 裝置提供 5V 1.5A 電源。Type-A 埠可提供 5V 2.4A,也可補償智慧型手機或平板電腦使用長纜線連接至埠時電壓下降的影響。本產品配備整合式 IEC ESD 和 VBUS 短路保護,可提供優異的系統可靠性。使用 12V 輸入的 USB 開關時,解決方案效率超過 91%。
Test report: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
VQFN-HR (RNL) 22 Ultra Librarian

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  • 產品標記
  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 認證摘要
  • 進行中持續性的可靠性監測
內含資訊:
  • 晶圓廠位置
  • 組裝地點

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