LM5146

現行

具寬占空比範圍的 100-V 同步降壓 DC/DC 控制器

產品詳細資料

Rating Catalog Topology Buck Vin (max) (V) 100 Vin (min) (V) 5.5 Iout (max) (A) 20 Control mode Voltage mode Vout (max) (V) 60 Vout (min) (V) 0.8 Features Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Enable, Enable/Shutdown, Frequency synchronization, Load Disconnect, Output discharge, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable, Voltage control mode, adjustable UVLO Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 1750 Duty cycle (max) (%) 99 Number of phases 1 TI functional safety category Functional Safety-Capable
Rating Catalog Topology Buck Vin (max) (V) 100 Vin (min) (V) 5.5 Iout (max) (A) 20 Control mode Voltage mode Vout (max) (V) 60 Vout (min) (V) 0.8 Features Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Enable, Enable/Shutdown, Frequency synchronization, Load Disconnect, Output discharge, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable, Voltage control mode, adjustable UVLO Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 1750 Duty cycle (max) (%) 99 Number of phases 1 TI functional safety category Functional Safety-Capable
VQFN (RGY) 20 15.75 mm² 4.5 x 3.5
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 5.5 V to 100 V
    • 150°C maximum junction temperature
    • 0.8-V reference with ±1% feedback accuracy
    • Adjustable output voltage from 0.8 V to 60 V
    • 40-ns tON(min) for high VIN / VOUT ratio
    • 140-ns tOFF(min) for low dropout
    • Lossless RDS(on) or shunt current sensing
    • Optimized for CISPR 11 and CISPR 32 Class B EMI requirements
  • Switching frequency from 100 kHz to 1 MHz
    • SYNC in and SYNC out capability
    • Selectable diode emulation or FPWM
  • 7.5-V gate drivers for standard VTH MOSFETs
    • 14-ns adaptive dead-time control
    • 2.3-A source and 3.5-A sink capability
  • Fast line and load transient response
    • Voltage-mode control with line feedforward
    • High gain-bandwidth error amplifier
  • Inherent protection features for robust design
    • Adjustable output voltage soft start
    • Hiccup-mode overcurrent protection
    • Input UVLO with hysteresis
    • VCC and gate-drive UVLO protection
    • Precision enable input and open-drain PGOOD indicator for sequencing and control
    • Thermal shutdown protection with hysteresis
  • 20-pin VQFN package with wettable flanks
  • Create a custom design using the LM5146 with WEBENCH Power Designer
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 5.5 V to 100 V
    • 150°C maximum junction temperature
    • 0.8-V reference with ±1% feedback accuracy
    • Adjustable output voltage from 0.8 V to 60 V
    • 40-ns tON(min) for high VIN / VOUT ratio
    • 140-ns tOFF(min) for low dropout
    • Lossless RDS(on) or shunt current sensing
    • Optimized for CISPR 11 and CISPR 32 Class B EMI requirements
  • Switching frequency from 100 kHz to 1 MHz
    • SYNC in and SYNC out capability
    • Selectable diode emulation or FPWM
  • 7.5-V gate drivers for standard VTH MOSFETs
    • 14-ns adaptive dead-time control
    • 2.3-A source and 3.5-A sink capability
  • Fast line and load transient response
    • Voltage-mode control with line feedforward
    • High gain-bandwidth error amplifier
  • Inherent protection features for robust design
    • Adjustable output voltage soft start
    • Hiccup-mode overcurrent protection
    • Input UVLO with hysteresis
    • VCC and gate-drive UVLO protection
    • Precision enable input and open-drain PGOOD indicator for sequencing and control
    • Thermal shutdown protection with hysteresis
  • 20-pin VQFN package with wettable flanks
  • Create a custom design using the LM5146 with WEBENCH Power Designer

The LM5146 100-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high-voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5146 continues to operate during input voltage dips as low as 5.5 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-performance industrial controls, robotics, datacom, and RF applications.

Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications.

The LM5146 100-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high-voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5146 continues to operate during input voltage dips as low as 5.5 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-performance industrial controls, robotics, datacom, and RF applications.

Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications.

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類型 標題 日期
* Data sheet LM5146 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range datasheet (Rev. A) PDF | HTML 2021年 6月 23日
Application note Controller to Converter – Design Considerations for 24V and 48V Systems PDF | HTML 2024年 10月 2日
Functional safety information LM5146 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021年 6月 23日
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators 2021年 4月 21日
EVM User's guide LM5146-Q1EVM User's Guide 2018年 8月 10日
White paper An overview of radiated EMI specifications for power supplies 2018年 6月 5日
White paper An overview of conducted EMI specifications for power supplies 2018年 2月 1日
Application brief Improve DC/DC Regulator EMI for Free with Optimized Power Stage Layout 2017年 11月 13日
EVM User's guide LM5145EVM-HD-20A High Density Evaluation Module (Rev. A) 2017年 6月 7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

LM5145EVM-HD-20A — LM5145 寬輸入電壓同步降壓控制器高密度評估模組

LM5145EVM-HD-20A 高密度評估模組 (EVM) 可展示具有寬輸入電壓範圍的 LM5145 高性能同步降壓 DC-DC 降壓控制器的效能。該設計採用微型元件封裝,元件數量少。此評估模組可在 24V 至 72V 的廣泛輸入電壓範圍內運作,提供固定 5V 輸出,設定點準確度優於 1%,且最大輸出電流可達 20A。憑藉 LM5145 的 40ns 最小開啟時間,就能以極低工作週期進行運作。LM5145 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 (...)
使用指南: PDF
TI.com 無法提供
開發板

LM5146-Q1-EVM12V — 同步降壓控制器評估模組

LM5146-Q1-EVM12V 高密度評估模組 (EVM) 可展示具有寬輸入電壓範圍的 LM5146-Q1 高性能同步降壓 DC-DC 降壓控制器的效能。該設計採用微型元件封裝,元件數量少。此評估模組可以在 15V 至 85V 的廣泛輸入電壓範圍內運作,提供高於 1% 設定點準確度及高達 8A 輸出電流的固定 12-V 輸出。憑藉 LM5146-Q1 的 40ns 最小開啟時間,就能以極低工作週期進行運作。LM5146-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 (...)

使用指南: PDF
TI.com 無法提供
模擬型號

LM5146 PSpice Unencrypted Transient Model Package

SNVMC65.ZIP (301 KB) - PSpice Model
計算工具

LM5146DESIGN-CALC LM5146/-Q1 100V synchronous buck controller quickstart calculator

Welcome to the LM5146/-Q1 quickstart design tool. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the LM5146/-Q1 100V synchronous buck controller. As such, the user can expeditiously arrive at an optimized design to meet the (...)

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)
LM5146 具寬占空比範圍的 100-V 同步降壓 DC/DC 控制器 LM5146-Q1 具有寬占空比範圍的車用 100V 同步降壓 DC/DC 控制器
硬體開發
開發板
LM5146-Q1-EVM12V 同步降壓控制器評估模組
PCB 佈局

LM5146-Q1-EVM12V PCB Layout Files

SNVR473.ZIP (7838 KB)
PCB 佈局

LM5145EVM-HD-20A PCB Layout Files

SNVR500.ZIP (1493 KB)
參考設計

TIDA-010089 — 雙象限、15V、8A、可編程線性直流電源供應器參考設計

此參考設計展現低雜訊有效率的雙向電源供應器,可實現低於 ±0.02% 全刻度 (FS) 電流與電壓控制準確度。此設計利用類比回饋迴路進行精確電流控制,並實作電壓追蹤電路,將來源模式線性級的功率消耗降到最低。此實作方式可實現 120W 輸出功率,並可在外部冷卻下汲取高達 25W。
Design guide: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
VQFN (RGY) 20 Ultra Librarian

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

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