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LM25149-Q1

現行

具超低 IQ 和整合式主動 EMI 濾波器的 42-V 車用同步降壓 DC/DC 控制器

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產品規格表

LM25149-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Topology Buck Controller Iout (max) (A) 30 Vin (max) (V) 42 Vin (min) (V) 3.5 Vout (max) (V) 36 Vout (min) (V) 0.8 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Load Disconnect, Phase Interleaving, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO adjustable EMI features Active EMI filter, Spread Spectrum Duty cycle (max) (%) 99 Iq (typ) (A) 0.0000095 Number of phases 2 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
Rating Automotive Topology Buck Controller Iout (max) (A) 30 Vin (max) (V) 42 Vin (min) (V) 3.5 Vout (max) (V) 36 Vout (min) (V) 0.8 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Load Disconnect, Phase Interleaving, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO adjustable EMI features Active EMI filter, Spread Spectrum Duty cycle (max) (%) 99 Iq (typ) (A) 0.0000095 Number of phases 2 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
VQFN (RGY) 24 19.25 mm² (5.5 mm × 3.5 mm)
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional Safety-Capable
  • Two integrated EMI mitigation mechanisms
    • Active EMI Filter for enhanced EMI performance at lower frequencies
    • Selectable dual random spread spectrum (DRSS) for enhanced EMI performance across low and high-frequency bands
    • EMI reduced by an average of 25 dBµV
    • Reduces the external differential-mode input filter size by 50% and lowers systems cost
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 3.5 V to 42 V
    • 1% accurate, fixed 3.3 V, 5 V, 12 V, or adjustable output from 0.8 V to 36 V
    • 150°C maximum junction temperature
    • Shutdown mode current: 2.3 µA
    • No-load sleep current: 9.5 µA
    • Stackable up to two phases
  • Switching frequency from 100 kHz to 2.2 MHz
    • SYNC in and SYNC out capability
  • Inherent protection features for robust design
    • Internal hiccup-mode overcurrent protection
    • ENABLE and PGOOD functions
    • VCC, VDDA, and gate-drive UVLO protection
    • Thermal shutdown protection with hysteresis
  • Create a custom design using the LM25149-Q1 with WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional Safety-Capable
  • Two integrated EMI mitigation mechanisms
    • Active EMI Filter for enhanced EMI performance at lower frequencies
    • Selectable dual random spread spectrum (DRSS) for enhanced EMI performance across low and high-frequency bands
    • EMI reduced by an average of 25 dBµV
    • Reduces the external differential-mode input filter size by 50% and lowers systems cost
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 3.5 V to 42 V
    • 1% accurate, fixed 3.3 V, 5 V, 12 V, or adjustable output from 0.8 V to 36 V
    • 150°C maximum junction temperature
    • Shutdown mode current: 2.3 µA
    • No-load sleep current: 9.5 µA
    • Stackable up to two phases
  • Switching frequency from 100 kHz to 2.2 MHz
    • SYNC in and SYNC out capability
  • Inherent protection features for robust design
    • Internal hiccup-mode overcurrent protection
    • ENABLE and PGOOD functions
    • VCC, VDDA, and gate-drive UVLO protection
    • Thermal shutdown protection with hysteresis
  • Create a custom design using the LM25149-Q1 with WEBENCH Power Designer

The LM25149-Q1 is a 42-V, ultra-low IQ synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM25149-Q1 can be set up in dual-phase mode with accurate current sharing for high-current applications. The device can operate with VIN as low as 3.5 V, at nearly 100% duty cycle if needed.

The LM25149-Q1 has two unique EMI reduction features: active EMI filter and dual random spread spectrum (DRSS). The active EMI filter senses any noise or ripple voltage on the DC input bus and injects an out-of-phase cancellation signal to reduce the disturbance. DRSS combines low-frequency triangular and high-frequency randomized modulations to mitigate EMI across lower and higher frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.

Additional features of the LM25149-Q1 include 150°C maximum junction temperature operation, user-selectable diode emulation for lower current consumption at light-load conditions, open-drain power-good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator and bootstrap diode, internal 3-ms soft-start time, and thermal shutdown protection with automatic recovery.

The LM25149-Q1 controller comes in a 3.5-mm × 5.5-mm thermally enhanced, 24-pin VQFN package with wettable flank pins to facilitate optical inspection during manufacturing.

The LM25149-Q1 is a 42-V, ultra-low IQ synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM25149-Q1 can be set up in dual-phase mode with accurate current sharing for high-current applications. The device can operate with VIN as low as 3.5 V, at nearly 100% duty cycle if needed.

The LM25149-Q1 has two unique EMI reduction features: active EMI filter and dual random spread spectrum (DRSS). The active EMI filter senses any noise or ripple voltage on the DC input bus and injects an out-of-phase cancellation signal to reduce the disturbance. DRSS combines low-frequency triangular and high-frequency randomized modulations to mitigate EMI across lower and higher frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.

Additional features of the LM25149-Q1 include 150°C maximum junction temperature operation, user-selectable diode emulation for lower current consumption at light-load conditions, open-drain power-good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator and bootstrap diode, internal 3-ms soft-start time, and thermal shutdown protection with automatic recovery.

The LM25149-Q1 controller comes in a 3.5-mm × 5.5-mm thermally enhanced, 24-pin VQFN package with wettable flank pins to facilitate optical inspection during manufacturing.
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LM25149 現行 具超低 IQ 和整合式主動 EMI 濾波器的 42-V 同步降壓 DC/DC 控制器 42-VIN commercial grade P2P option

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 LM25149-Q1 42-V Automotive, Synchronous, Buck, DC/DC Controller with Ultra-Low IQ and Integrated Active EMI Filter datasheet (Rev. B) PDF | HTML 2023/1/24
白皮書 Time-Saving and Cost-Effective Innovations for EMI Reduction (Rev. A) PDF | HTML 2023/11/28
應用說明 How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck PDF | HTML 2023/8/16
類比設計期刊 How to ensure the stability and performance of an active EMI filter PDF | HTML 2022/4/1
更多文件說明 Using an active EMI filter in power converters to reduce EMI filter size & cost 2021/12/15
更多文件說明 Advanced Power-Converter Features for Reducing EMI PDF | HTML 2021/12/7
更多文件說明 Advanced power-converter features to reduce EMI PPT 2021/12/2
功能安全資訊 LM25149-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021/9/14
證書 Automotive PPAP Documentation 2021/6/18
電子書 An Engineer’s Guide to Low EMI in DC/DC Regulators 2021/4/21
技術文章 Introduction to EMI: Standards, causes and mitigation techniques PDF | HTML 2021/4/21
技術文章 How to reduce EMI and shrink power-supply size with an integrated active EMI filte PDF | HTML 2021/4/5
類比設計期刊 The pros and cons of spread‐spectrum implementation methods in buck regulators 2021/3/18
技術文章 Lowering audible noise in automotive applications with TI’s DRSS technology PDF | HTML 2021/3/18
證書 LM25149-Q1EVM-2100 EU Declaration of Conformity (DoC) 2021/3/17

設計與開發

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開發板

LM25149-Q1EVM-2100 — LM25149-Q1 5.5-V 至 36-V 低 IQ、同步降壓 DC/DC 控制器評估模組

LM25149-Q1EVM-2100 高密度評估模組 (EVM) 的設計目的在於展示 LM25149-Q1 高性能、車用同步降壓 DC/DC 降壓控制器。此評估模組可以在 5.5 V 至 36 V 的廣泛輸入電壓範圍內運作，可提供高於 1% 設定點準確度，及高達 8-A 輸出電流的固定 5-V 輸出。LM25149-Q1 提供先進 EMI 性能和超低 IQ。發生故障期間的穩壓器功能包括：電壓過低鎖定、內部緩啟動、Hiccup 模式過電流防護以及過熱自動關機。另外還提供開漏 PGOOD 指示器和 SYNC IN / SYNC OUT 模式功能。
使用指南: PDF | HTML
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開發板

LM5143-Q1EVM-2100 — 雙通道汽車同步降壓控制器評估模組

LM5143-Q1-EVM2100 高密度評估模組 (EVM) 的設計目的在於展示 LM5143-Q1 高性能、雙通道、車用同步降壓 DC/DC 降壓控制器的性能。可在 3.5V 至 36V 的寬輸入電壓範圍內運行，提供固定 5V 和 3.3V 輸出，設定精度優於 1%，且每通道可提供高達 7A 的電流。由於 LM5143-Q1的最小開啟時間為 65ns ，使其能在極低工作週期運作。LM5143-Q1 提供全套防護功能，可確保穩壓器在發生故障時提供防護。其中包括欠電壓鎖定以在電壓暫降情況下確保正常運作、可編程緩啟動以減少突波電流、Hiccup 模式過電流保護及過熱自動關機。另外還提供開漏 (...)
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開發板

LM5149-Q1EVM-400 — 搭載主動式 EMI 濾波器的 72-V、低 IQ、同步降壓 DC/DC 控制器的 LM5149-Q1 評估模組

LM5149-Q1EVM-400 高密度評估模組 (EVM) 的設計目的在於展示 LM5149-Q1 高性能、車用同步降壓 DC/DC 降壓控制器。EVM 可在 15 V 至 72 V 的廣泛輸入電壓範圍內運作，可提供高於 1% 設定點準確度，及高達 8-A 輸出電流的固定 12-V 輸出。LM5149-Q1 提供先進的 EMI 性能、超低 IQ 保護功能，可在穩壓器故障狀況下提供防護，包括電壓過低鎖定、內部緩啟動、打嗝模式過電流保護，以及過熱自動關機。該設備還包括開漏 PGOOD 指示器和 SYNC IN 功能。

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模擬型號

LM25149-Q1 PSpice Transient Model

SNVMC96.ZIP (308 KB) - PSpice 模型
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計算工具

LM5149-LM25149DESIGN-CALC — 具有 AEF 快速入門設計工具的 LM5149/-Q1 和 LM25149/-Q1 降壓控制器

歡迎使用 LM5149、LM5149-Q1、LM25149 和 LM25149-Q1 的快速入門設計工具。此獨立工具會加速協助提供電源供應器工程師採用上述控制器系列的 DC/DC 降壓穩壓器進行設計。因此，使用者可以迅速達到最佳化的設計，以符合應用需求。
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參考設計

TIPA-020001 — 使用 AutoChips™ AC8025 SoC 的電源供應設計

此概念驗證詳細說明採用電源管理 IC (PMIC) 設計的 AC8025 (來自 AutoChips™) 系統單晶片(SoC) 電源軌的離散式電源設計之設計考量。此設計使用 TPS6593-Q1 PMIC、 ， TPS62875-Q1 同步降壓轉換器及 TPS745-Q1 低壓降 (LDO) 穩壓器。原始電源是電池。電池電壓經轉換後可調節 5V 或 3.8V 匯流排。LM25149-Q1 將電池電壓轉換為調節匯流排電壓。此設計中的所有元件皆符合車用資格。
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參考設計

TIPA-020002 — 使用 LP8752-Q1 和 LP8756-Q1 且適用於 Semidrive X9SP (X9HP 相容) 的電源供應設計

此電源設計適用於使用 LP87521-Q1、LP87562-Q1 和 LP87563-Q1 電源管理 IC (PMIC) 的 Semidrive X9SP 汽車系統單晶片 (SoC) 電源軌。額外的降壓 TPS62811-Q1 和 TPS628501-Q1，以及 LDO TPS74501-Q1 和 TLV76733-Q1 用於為 PMIC 未涵蓋的其他離散式軌供電。此電源設計假設輸入電壓為 5V (±5%)。若系統輸入電壓較高，例如汽車電池，需使用降壓轉換器作為前置穩壓器，以產生 5V 的供應電壓。直接從車用電池供電時， LM25149-Q1 可用作前置穩壓器。LM74700-Q1 (...)
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