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DC/DC 控制器

LM5143

現行

具超低 IQ 的 3.5-V 至 65-V、雙輸出、堆疊式同步降壓 DC/DC 控制器

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產品規格表

LM5143

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 100 Vin (max) (V) 65 Vin (min) (V) 3.5 Vout (max) (V) 55 Vout (min) (V) 0.6 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Multiple Outputs, Phase Interleaving, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO adjustable EMI features Spread Spectrum Duty cycle (max) (%) 99 Iq (typ) (A) 0.0000165 Number of phases 2 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
Rating Catalog Topology Buck Iout (max) (A) 100 Vin (max) (V) 65 Vin (min) (V) 3.5 Vout (max) (V) 55 Vout (min) (V) 0.6 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Multiple Outputs, Phase Interleaving, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO adjustable EMI features Spread Spectrum Duty cycle (max) (%) 99 Iq (typ) (A) 0.0000165 Number of phases 2 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
VQFN (RHA) 40 36 mm² (6 mm × 6 mm)
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 3.5 V to 65 V
    • 1% accurate, fixed 3.3-V, 5-V, or adjustable outputs from 0.6 V to 55 V
    • 150°C maximum junction temperature
    • 4-µA typical shutdown mode current
    • 15-µA typical no-load standby current
  • Two interleaved synchronous buck channels
    • Dual channel or single-output multiphase
    • 65-ns tON(min) for high VIN/VOUT ratio
    • 60-ns tOFF(min) for low dropout
  • Inherent protection features for robust design
    • Shunt or inductor DCR current sensing
    • Hiccup mode overcurrent protection
    • Independent ENABLE and PGOOD functions
    • Adjustable output voltage soft start
    • VCC, VDDA, and gate-drive UVLO protection
    • Thermal shutdown protection with hysteresis
  • Optimized for CISPR 11 and CISPR 32 class B conducted and radiatedEMI requirements
    • Slew-rate controlled adaptive gate drivers
    • Spread spectrum reduces peak emissions
  • 100-kHz to 2.2-MHz switching frequency
    • SYNC in and SYNC out capability
    • Selectable diode emulation or FPWM modes
  • 6-mm × 6-mm VQFN-40 package
  • Create a custom design using the LM5143 with WEBENCH Power Designer
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 3.5 V to 65 V
    • 1% accurate, fixed 3.3-V, 5-V, or adjustable outputs from 0.6 V to 55 V
    • 150°C maximum junction temperature
    • 4-µA typical shutdown mode current
    • 15-µA typical no-load standby current
  • Two interleaved synchronous buck channels
    • Dual channel or single-output multiphase
    • 65-ns tON(min) for high VIN/VOUT ratio
    • 60-ns tOFF(min) for low dropout
  • Inherent protection features for robust design
    • Shunt or inductor DCR current sensing
    • Hiccup mode overcurrent protection
    • Independent ENABLE and PGOOD functions
    • Adjustable output voltage soft start
    • VCC, VDDA, and gate-drive UVLO protection
    • Thermal shutdown protection with hysteresis
  • Optimized for CISPR 11 and CISPR 32 class B conducted and radiatedEMI requirements
    • Slew-rate controlled adaptive gate drivers
    • Spread spectrum reduces peak emissions
  • 100-kHz to 2.2-MHz switching frequency
    • SYNC in and SYNC out capability
    • Selectable diode emulation or FPWM modes
  • 6-mm × 6-mm VQFN-40 package
  • Create a custom design using the LM5143 with WEBENCH Power Designer

The LM5143 is a 65-V DC/DC synchronous buck controller for high-current single or dual outputs. Deriving from a family of wide-VIN range controllers, the device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output current. A high-side switch minimum on time of 65 ns provides large step-down ratios, enabling the direct conversion from 12-V, 24-V, or 48-V inputs to low-voltage rails for reduced system complexity and cost. The LM5143 continues to operate during input voltage dips as low as 3.5 V, at nearly 100% duty cycle if needed.

The 15-µA no-load quiescent current with the output voltage in regulation extends operating run-time in battery-powered systems. Power the LM5143 from the output of the switching regulator or another available source for even lower input quiescent current and power loss.

The LM5143 is a 65-V DC/DC synchronous buck controller for high-current single or dual outputs. Deriving from a family of wide-VIN range controllers, the device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output current. A high-side switch minimum on time of 65 ns provides large step-down ratios, enabling the direct conversion from 12-V, 24-V, or 48-V inputs to low-voltage rails for reduced system complexity and cost. The LM5143 continues to operate during input voltage dips as low as 3.5 V, at nearly 100% duty cycle if needed.

The 15-µA no-load quiescent current with the output voltage in regulation extends operating run-time in battery-powered systems. Power the LM5143 from the output of the switching regulator or another available source for even lower input quiescent current and power loss.
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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 LM5143 3.5-V to 65-V Dual Synchronous Buck DC/DC Controller With Ultra-Low IQ datasheet PDF | HTML 2022/3/18
應用說明 Controller to Converter – Design Considerations for 24V and 48V Systems PDF | HTML 2024/10/2
應用說明 How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck PDF | HTML 2023/8/16
功能安全資訊 LM5143 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2022/2/16
電子書 An Engineer’s Guide to Low EMI in DC/DC Regulators 2021/4/21
應用說明 LM5143-Q1 4-phase Buck Regulator Design (Rev. A) PDF | HTML 2020/4/28

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

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 (...)
使用指南: PDF
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模擬型號

LM5143 PSpice Transient Model

SNVMCA3.ZIP (336 KB) - PSpice 模型
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計算工具

LM5143DESIGN-CALC — LM5143-Q1 Controller Quickstart Design Tool

此獨立式工具可推動並協助設計以 LM5143-Q1 同步降壓 DC/DC 控制器及低 IQ 為基礎的 DC/DC 降壓穩壓器。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

PMP23262 — 200-W 車用雙相同步降壓轉換器參考設計

此參考設計可為汽車先進駕駛輔助系統 (ADAS) 設計、車載資訊娛樂系統和儀錶板應用提供電源。汽車應用操作包含最高 32 V 電池電壓突波，以及因冷車啟動而下降至 6 V。說明在 10-Vin 至 18-Vin 範圍內的 94 % 至 96 % 峰值轉換效率。30-A 步進與突降的輸出電壓未達目標和過衝為 2%。測試報告包含完整輸入範圍內的操作資料，並提供波德圖以適當邊界、內部波形和熱影像來驗證穩定性。
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參考設計

PMP31210 — 具有擴展輸入電壓範圍的 700-W、四相降壓轉換器參考設計

此參考設計為使用 LM5143A-Q1 產品的 700-W 降壓轉換器。由於具有低失效時間、強力驅動器與可個別調整上升和下降邊緣的能力，因此效率可達 98%。由於損耗降低，因此可將基板面積縮至最小。其為 150 mm × 125 mm，高度則為小巧的 12 mm 或 15 mm (視所選電感器而定)。透過使用強制冷卻或安裝在機箱上的散熱器，因此具有足夠的空餘空間來提高輸出功率。使用額外的冷卻選項，輸出電流可增加至 60-A 連續與以上。交錯式運作可在輸入電容器上產生低均方根 (RMS) 應力，並減少輸入與輸出的漣波。提供通用兩級 EMI 輸入濾波器。
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VQFN (RHA) 40 Ultra Librarian
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