首頁 電源管理 DC/DC switching regulators DC/DC converters
首頁
電源管理
DC/DC switching regulators
DC/DC converters

LMR38020

現行

具 40-µA IQ 的 SIMPLE SWITCHER® 電源轉換器 4.2-V 至 80-V、2-A 同步降壓

立即訂購
產品規格表

LMR38020

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 80 Vin (min) (V) 4.2 Vout (max) (V) 75 Vout (min) (V) 1 EMI features Spread Spectrum Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO Fixed Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.00004 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable
Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 80 Vin (min) (V) 4.2 Vout (max) (V) 75 Vout (min) (V) 1 EMI features Spread Spectrum Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO Fixed Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.00004 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4.2-V to 80-V input voltage range
    • 2-A continuous output current
    • Ultra-low 40-µA operating quiescent current
    • > 1.5-mm distance between VIN and GND pin
    • 200-kHz to 2.2-MHz adjustable switching frequency
    • Frequency synchronization to external clock
    • Spread spectrum option for reduced EMI
    • 97% maximum duty cycle
    • Support start-up with pre-biased output
    • ±1.0% tolerance voltage reference at room temperature
    • Precision enable
    • Easy to use device with integrated compensation network enabling low BOM count
    • Integrated synchronous rectification
    • 8-pin HSOIC with PowerPAD™ integrated circuit package
    • PFM and forced PWM (FPWM) options
    • Available in 1-A, LMR38010
  • Create a custom design using the LMR38020 with the WEBENCH Power Designer
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4.2-V to 80-V input voltage range
    • 2-A continuous output current
    • Ultra-low 40-µA operating quiescent current
    • > 1.5-mm distance between VIN and GND pin
    • 200-kHz to 2.2-MHz adjustable switching frequency
    • Frequency synchronization to external clock
    • Spread spectrum option for reduced EMI
    • 97% maximum duty cycle
    • Support start-up with pre-biased output
    • ±1.0% tolerance voltage reference at room temperature
    • Precision enable
    • Easy to use device with integrated compensation network enabling low BOM count
    • Integrated synchronous rectification
    • 8-pin HSOIC with PowerPAD™ integrated circuit package
    • PFM and forced PWM (FPWM) options
    • Available in 1-A, LMR38010
  • Create a custom design using the LMR38020 with the WEBENCH Power Designer

The LMR38020 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020 operates during input voltage dips as low as 4.2 V, at nearly 100% duty cycle if needed, making the device an excellent choice for wide input industrial applications and MHEV/EV systems.

The LMR38020 uses precision enable to provide flexibility by enabling a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status, eliminating the need for an external supervisor. The device incorporates pseudorandom spread spectrum for minimal EMI and switching frequency can be configured between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

The device has built-in protection features such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR38020 is available in an 8-pin HSOIC PowerPAD integrated circuit package.

The LMR38020 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020 operates during input voltage dips as low as 4.2 V, at nearly 100% duty cycle if needed, making the device an excellent choice for wide input industrial applications and MHEV/EV systems.

The LMR38020 uses precision enable to provide flexibility by enabling a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status, eliminating the need for an external supervisor. The device incorporates pseudorandom spread spectrum for minimal EMI and switching frequency can be configured between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

The device has built-in protection features such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR38020 is available in an 8-pin HSOIC PowerPAD integrated circuit package.
filter 尋找其它 DC/DC converters
下載 觀看有字幕稿的影片 影片

您可能會感興趣的類似產品

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
LMR38025 現行 具展頻功能的 80V 輸入、2.5A 同步降壓 DC/DC 轉換器 Same device in smaller WSON package

技術文件

star =TI 所選的此產品重要文件
找不到結果。請清除您的搜尋條件，然後再試一次。
檢視所有 4
類型 標題 日期
* Data sheet LMR38020 4.2-V to 80-V, 2-A, Synchronous SIMPLE SWITCHER Power Converter with 40-µA IQ datasheet (Rev. E) PDF | HTML 2023年 9月 18日
Application note Designing an Isolated Buck Converter using the LMR38020 PDF | HTML 2023年 8月 30日
Application note Auxiliary Power Supply Design Based on LMR38020 Fly-Buck in Solar Micro Inverter PDF | HTML 2023年 8月 29日
Functional safety information LMR380x0 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021年 11月 2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

LMR38020EVM — 具 40-uA IQ 的 LMR38020 評估模組 SIMPLE SWITCHER 80-V、2-A、2.2-MHz 降壓轉換器

LMR38020EVM 評估模組 (EVM) 是完全組裝且經過測試的電路，用於評估 LMR38020F 降壓轉換器。基板具有跳線連接器，用於指示 POWERGOOD 旗標並與外部時脈同步。基板也具備用於環路量測的 AC 訊號注入端子。
使用指南: PDF | HTML
TI.com 無法提供
開發板

LMR38020QEVM — LMR38020-Q1 評估模組 SIMPLE SWITCHER® 電源轉換器 80-V、2-A 同步降壓 40-µA IQ

LM38020QEVM 評估模組 (EVM) 使用 LMR38020S-Q1，是一款採用同步整流的 80-V DC/DC 降壓穩壓器，可在較小體積中實現高轉換效率。EVM 可在 6 V 至 80 V 的寬輸入電壓範圍內運作，以 400-kHz 切換頻率提供穩壓 5-V 輸出。輸出電壓的設定點準確度高於 1.5%，並可使用外部電阻分壓器進行調節。LMR38020QEVM 符合 LMR38020-Q1 與 LMR38020 降壓轉換器的要求。
使用指南: PDF | HTML
TI.com 無法提供
模擬型號

LMR38020F PSpice Transient Model

SNVMC78.ZIP (288 KB) - PSpice Model
下載
模擬型號

LMR38020S PSpice Transient Model

SNVMC92.ZIP (260 KB) - PSpice Model
下載
計算工具

LMR38020-DESIGN-CALC — LMR38020 Quick Start Design Calculator

Quickstart Calculator for the LMR38020 and LMR38020-Q1 devices
支援產品和硬體

支援產品和硬體

產品
DC/DC converters
  • LMR38020 — 具 40-µA IQ 的 SIMPLE SWITCHER® 電源轉換器 4.2-V 至 80-V、2-A 同步降壓
  • LMR38020-Q1 — 車用 SIMPLE SWITCHER® 電源轉換器 4.2-V 至 80-V、2-A、同步降壓轉換器
下載
參考設計

TIDA-010950 — 具有功率調節和霍爾效應位置感測功能的阻尼器與 EEV 控制器參考設計

此參考設計展示了阻尼器致動器與電子膨脹閥的雙馬達驅動解決方案。多重馬達驅動包含一個雙極步進馬達驅動器、一個由 15VDC 來源運作的無刷 DC 馬達驅動器。此設計顯示出精確的功率限制，有助於輕鬆鑑定為由 IEC 60335-1 定義的低功率電路。此參考設計整合 0-10V 和 4-20mA 控制介面，可控制閥門或阻尼器位置，以及用於精確位置感測的 TMAG5273。
Design guide: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
HSOIC (DDA) 8 Ultra Librarian
適用 TI 的評估品項標準條款與條件。

訂購與品質

內含資訊：
  • RoHS
  • REACH
  • 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

建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。

支援與培訓

內含 TI 工程師技術支援的 TI E2E™ 論壇

以英文檢視所有論壇主題

內容係由 TI 和社群貢獻者依「現狀」提供，且不構成 TI 規範。檢視使用條款。

若有關於品質、封裝或訂購 TI 產品的問題，請參閱 TI 支援。​​​​​​​​​​​​​​

影片