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LMR38020-Q1

現行

車用 SIMPLE SWITCHER® 電源轉換器 4.2-V 至 80-V、2-A、同步降壓轉換器

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產品規格表

LMR38020-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Topology Buck Iout (max) (A) 2 Vin (max) (V) 80 Vin (min) (V) 4.2 Vout (max) (V) 75 Vout (min) (V) 1 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 EMI features Spread Spectrum 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 Sector Robotics
Rating Automotive Topology Buck Iout (max) (A) 2 Vin (max) (V) 80 Vin (min) (V) 4.2 Vout (max) (V) 75 Vout (min) (V) 1 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 EMI features Spread Spectrum 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 Sector Robotics
HSOIC (DDA) 8 29.4 mm² (4.9 mm × 6 mm)
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Configured for rugged automotive applications
    • 4.2V to 80V input voltage range
    • 2A continuous output current
    • Ultra-low 40µA operating quiescent current
    • > 1.5mm distance between VIN and GND pin
    • 200kHz to 2.2MHz adjustable switching frequency
    • Frequency synchronization to external clock
    • Spread spectrum for reduced EMI
    • 97% maximum duty cycle
    • Support start-up with prebiased 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 1A, LMR38010-Q1
  • Create a custom design using the LMR38020-Q1 with the WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Configured for rugged automotive applications
    • 4.2V to 80V input voltage range
    • 2A continuous output current
    • Ultra-low 40µA operating quiescent current
    • > 1.5mm distance between VIN and GND pin
    • 200kHz to 2.2MHz adjustable switching frequency
    • Frequency synchronization to external clock
    • Spread spectrum for reduced EMI
    • 97% maximum duty cycle
    • Support start-up with prebiased 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 1A, LMR38010-Q1
  • Create a custom design using the LMR38020-Q1 with the WEBENCH Power Designer

The LMR38020-Q1 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020-Q1 operates during input voltage dips as low as 4.2V, at nearly 100% duty cycle if needed, making the device an excellent choice for 48-V battery automotive applications and MHEV/EV systems.

The LMR38020-Q1 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 200kHz and 2.2MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller design 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-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in an 8-pin HSOIC PowerPAD integrated circuit package.

The LMR38020-Q1 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020-Q1 operates during input voltage dips as low as 4.2V, at nearly 100% duty cycle if needed, making the device an excellent choice for 48-V battery automotive applications and MHEV/EV systems.

The LMR38020-Q1 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 200kHz and 2.2MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller design 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-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in an 8-pin HSOIC PowerPAD integrated circuit package.
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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 LMR38020-Q1 4.2V to 80V, 2A , Automotive, Synchronous SIMPLE SWITCHER Power Converter With 40µA IQ datasheet (Rev. B) PDF | HTML 2024/1/23
應用說明 Reducing Conducted EMI in a Buck Converter for 48 V Automotive Applications PDF | HTML 2023/12/13
證書 LMR38025QEVM EU Declaration of Conformity (DoC) PDF | HTML 2023/11/8
功能安全資訊 LMR380x0-Q1 Functional Safety, FIT Rate, Failure Mode Distribution, and Pin FMA PDF | HTML 2021/11/5
證書 LMR38020QEVM EU RoHS Declaration of Conformity (DoC) 2021/10/26

設計與開發

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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
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模擬型號

LMR38020S-Q1 PSpice Transient Model

SNVMC93.ZIP (261 KB) - PSpice 模型
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計算工具

LMR38020-DESIGN-CALC — LMR38020 快速入門設計計算機

Quickstart Calculator for the LMR38020 and LMR38020-Q1 devices
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參考設計

TIDA-020061 — 適用於 100/1000Base-T1 乙太網路應用的汽車數據線供電 PD 參考設計

此參考設計實作供電裝置 (PD)，以展示汽車應用中的數據線供電 (PoDL)。此設計使用 DP83TG720S-Q1 1000MBit/s 單對乙太網路 (SPE) PHY，並可選擇切換至 DP83TC812S-Q1 SPE PHY 以進行 100MBit/s 運作。耦合與去耦合網路用於分割單對乙太網路 (SPE) 纜線上的資料和電源。

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