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AC/DC 和 DC/DC 控制器 (外部 FET)

LM5145-Q1

現行

具有寬占空比範圍的車用 75V 同步降壓 DC/DC 控制器

立即訂購
產品規格表

LM5145-Q1

現行
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 5.5 Vin (max) (V) 75 Operating temperature range (°C) -40 to 150 Control mode Voltage mode Topology Buck Rating Automotive Vout (min) (V) 0.8 Vout (max) (V) 60 Features Adjustable current limit, Enable, Light Load Efficiency, Load Disconnect, Output discharge, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 1800 Duty cycle (max) (%) 99 Number of phases 1 TI functional safety category Functional Safety-Capable
Vin (min) (V) 5.5 Vin (max) (V) 75 Operating temperature range (°C) -40 to 150 Control mode Voltage mode Topology Buck Rating Automotive Vout (min) (V) 0.8 Vout (max) (V) 60 Features Adjustable current limit, Enable, Light Load Efficiency, Load Disconnect, Output discharge, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 1800 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
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient temperature range
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 5.5 V to 75 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 25 Class 5 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
  • 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 LM5145-Q1 with WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient temperature range
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 5.5 V to 75 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 25 Class 5 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
  • 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 LM5145-Q1 with WEBENCH Power Designer

The LM5145-Q1 75-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 LM5145-Q1 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-power automotive DC/DC regulators, automotive motor drives, and HEV/EV power compliant to LV-148.

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 LM5145-Q1 75-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 LM5145-Q1 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-power automotive DC/DC regulators, automotive motor drives, and HEV/EV power compliant to LV-148.

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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LM5145 現行 具有寬輸入電壓和工作週期範圍的 75V 同步降壓控制器 Pin-to-pin, non-automotive equivalent
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LM5146-Q1 現行 具有寬占空比範圍的車用 100V 同步降壓 DC/DC 控制器 Pin-to-pin, automotive qualified, higher input voltage protection

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類型 標題 日期
* Data sheet LM5145-Q1 Automotive 75-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range datasheet (Rev. A) PDF | HTML 2021年 6月 8日
Application note Controller to Converter – Design Considerations for 24V and 48V Systems PDF | HTML 2024年 10月 2日
Functional safety information LM5145-Q1 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
Application note Creating a Dual USB Universal Car Charger From the TPS40170 and Two TPS2511 2012年 5月 22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

The LM5145EVM-HD-20A high density evaluation module (EVM) is designed to showcase the performance of the LM5145 high performance, synchronous buck DC-DC buck controller with wide input voltage range. The design is packaged in a miniature footprint with low component count. It operates over a wide (...)
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

The LM5146-Q1-EVM12V high density evaluation module (EVM) is designed to showcase the performance of the LM5146-Q1 high performance, synchronous buck DC-DC buck controller with wide input voltage range. The design is packaged in a miniature footprint with low component count. It operates over a (...)

使用指南: PDF
TI.com 無法提供
模擬型號

LM5145-Q1 PSpice Unencrypted Transient Model Package

SNVMC66.ZIP (301 KB) - PSpice Model
下載
計算工具

LM5145DESIGN-CALC — LM5145 Quickstart Design Tool

Welcome to the LM5145 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 LM5145 75V synchronous buck controller. As such, the user can expeditiously arrive at an optimized design to meet the (...)

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支援產品和硬體

產品
AC/DC 和 DC/DC 控制器 (外部 FET)
LM5145 — 具有寬輸入電壓和工作週期範圍的 75V 同步降壓控制器 LM5145-Q1 — 具有寬占空比範圍的車用 75V 同步降壓 DC/DC 控制器
硬體開發
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
軟體
計算工具
LM5145DESIGN-CALC — LM5145 同步降壓控制器設計工具
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PCB 佈局

LM5146-Q1-EVM12V PCB Layout Files

SNVR473.ZIP (7838 KB)
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PCB 佈局

LM5145EVM-HD-20A PCB Layout Files

SNVR500.ZIP (1493 KB)
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VQFN (RGY) 20 Ultra Librarian
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