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AC/DC 和 DC/DC 控制器 (外部 FET)

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

Vin (min) (V) 3.5 Vin (max) (V) 65 Iout (max) (A) 100 Operating temperature range (°C) -40 to 150 Control mode current mode Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 55 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 Iq (typ) (µA) 16.5 Duty cycle (max) (%) 99 Number of phases 2 TI functional safety category Functional Safety-Capable
Vin (min) (V) 3.5 Vin (max) (V) 65 Iout (max) (A) 100 Operating temperature range (°C) -40 to 150 Control mode current mode Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 55 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 Iq (typ) (µA) 16.5 Duty cycle (max) (%) 99 Number of phases 2 TI functional safety category Functional Safety-Capable
VQFN (RHA) 40 36 mm² 6 x 6
  • 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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類型 標題 日期
* Data sheet LM5143 3.5-V to 65-V Dual Synchronous Buck DC/DC Controller With Ultra-Low IQ datasheet PDF | HTML 2022年 3月 18日
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 2024年 4月 30日
Application note How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck PDF | HTML 2023年 8月 16日
Functional safety information LM5143 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2022年 2月 16日
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators 2021年 4月 21日
Application note LM5143-Q1 4-phase Buck Regulator Design (Rev. A) PDF | HTML 2020年 4月 28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

LM5143-Q1EVM-2100 — 雙通道汽車同步降壓控制器評估模組

The LM5143-Q1-EVM2100 high density evaluation module (EVM) is designed to showcase the performance of the LM5143-Q1 high performance, dual-channel, automotive synchronous buck DC/DC buck controller. It operates over a wide input voltage range of 3.5 V to 36 V to deliver fixed 5-V and 3.3-V outputs (...)
使用指南: PDF
TI.com 無法提供
模擬型號

LM5143 PSpice Transient Model

SNVMCA3.ZIP (336 KB) - PSpice Model
下載
計算工具

LM5143DESIGN-CALC — LM5143-Q1 Controller Quickstart Design Tool

This stand-alone tool facilitates and assists with the design of a DC/DC buck regulator based on the LM5143-Q1 synchronous buck DC/DC controller with low IQ. The user can expeditiously arrive at an optimized design to meet the application requirements.

支援產品和硬體

支援產品和硬體

產品
AC/DC 和 DC/DC 控制器 (外部 FET)
LM25143 — 具超低 IQ 的 3.5-V 至 42-V、雙輸出、堆疊式同步降壓 DC/DC 控制器 LM25143-Q1 — 車用 3.5-V 至 42-V、低 IQ、雙輸出、堆疊式同步降壓 DC-DC 控制器 LM5143 — 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 LM5143-Q1 — 3.5V 至 65V 低 IQ、雙路雙相同步降壓 DC-DC 控制器 LM5143A-Q1 — 車用 3.5-V 至 65-V、低 IQ、雙輸出、堆疊式同步降壓 DC-DC 控制器
硬體開發
開發板
LM5143-Q1EVM-2100 — 雙通道汽車同步降壓控制器評估模組
軟體
計算工具
LM5143DESIGN-CALC — LM5143-Q1、LM5143A-Q1、LM5143、LM25143-Q1 及 LM25143 控制器快速入門設計工具
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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。
Test report: PDF
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。
Test report: PDF
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