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AC/DC 和 DC/DC 控制器 (外部 FET)

LM5119

現行

5.5-65V 大範圍 VIN 電流模式雙同步降壓控制器

立即訂購
產品規格表

LM5119

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) 65 Iout (max) (A) 15 Operating temperature range (°C) -40 to 125 Control mode current mode Topology Multiphase Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 64 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 6000 Duty cycle (max) (%) 98 Number of phases 2
Vin (min) (V) 5.5 Vin (max) (V) 65 Iout (max) (A) 15 Operating temperature range (°C) -40 to 125 Control mode current mode Topology Multiphase Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 64 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 6000 Duty cycle (max) (%) 98 Number of phases 2
WQFN (RTV) 32 25 mm² 5 x 5
  • Emulated Peak Current Mode Control
  • Wide Operating Range (5.5 V to 65 V)
  • Easily Configurable for Dual Outputs or Interleaved Single Output
  • Robust 3.3-A Peak Gate Drive
  • Switching Frequency Programmable to 750 kHz
  • Optional Diode Emulation Mode
  • Programmable Output from 0.8 V
  • Precision 1.5% Voltage Reference
  • Programmable Current Limit
  • Hiccup Mode Overload Protection
  • Programmable Soft-Start
  • Programmable Line Undervoltage Lockout
  • Automatic Switch-Over to External Bias Supply
  • Channel2 Enable Logic Input
  • Thermal Shutdown
  • Leadless 32-Pin WQFN Package
  • Emulated Peak Current Mode Control
  • Wide Operating Range (5.5 V to 65 V)
  • Easily Configurable for Dual Outputs or Interleaved Single Output
  • Robust 3.3-A Peak Gate Drive
  • Switching Frequency Programmable to 750 kHz
  • Optional Diode Emulation Mode
  • Programmable Output from 0.8 V
  • Precision 1.5% Voltage Reference
  • Programmable Current Limit
  • Hiccup Mode Overload Protection
  • Programmable Soft-Start
  • Programmable Line Undervoltage Lockout
  • Automatic Switch-Over to External Bias Supply
  • Channel2 Enable Logic Input
  • Thermal Shutdown
  • Leadless 32-Pin WQFN Package

The LM5119 device is a dual synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control using an emulated current ramp. Current mode control provides inherent line feedforward, cycle-by-cycle current limiting and ease-of-loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The switching frequency is programmable from 50 kHz to 750 kHz. The LM5119 device drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator with automatic switch-over to external bias further improves efficiency. Additional features include thermal shutdown, frequency synchronization, cycle-by-cycle and hiccup mode current limit and adjustable line undervoltage lockout. The device is available in a power enhanced leadless 32-pin WQFN package featuring an exposed die attach pad to aid thermal dissipation.

The LM5119 device is a dual synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control using an emulated current ramp. Current mode control provides inherent line feedforward, cycle-by-cycle current limiting and ease-of-loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The switching frequency is programmable from 50 kHz to 750 kHz. The LM5119 device drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator with automatic switch-over to external bias further improves efficiency. Additional features include thermal shutdown, frequency synchronization, cycle-by-cycle and hiccup mode current limit and adjustable line undervoltage lockout. The device is available in a power enhanced leadless 32-pin WQFN package featuring an exposed die attach pad to aid thermal dissipation.
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LM25119 現行 4.5-42V 大範圍 VIN 電流模式雙同步降壓控制器 Lower Vin max at 42 V

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類型 標題 日期
* Data sheet LM5119 Wide Input Range Dual Synchronous Buck Controller datasheet (Rev. I) PDF | HTML 2018年 1月 29日
Analog Design Journal Control-Mode Quick Reference Guide (Rev. B) PDF | HTML 2023年 8月 29日
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 2019年 4月 10日
White paper Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) 2018年 7月 3日
More literature LM5119, LM25119 Quick Start Calculator (Rev. B) 2017年 2月 3日
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016年 7月 21日
Technical article Power Tips: The ground plane – a critical element in noise management of switching PDF | HTML 2015年 8月 19日
Technical article Power Tips: Design considerations for a four-phase 1,200W synchronous buck – part PDF | HTML 2015年 7月 15日
Technical article Power Tips: Four-phase, 1.2-kW design achieves high efficiency at higher currents PDF | HTML 2015年 6月 10日
White paper Power Management IC (PMIC) Guide for Automotive (Rev. A) 2014年 10月 29日
More literature LM5119 and LM25119 Design tool 2014年 2月 26日
White paper Wide VIN power management ICs simplify white paper (Rev. A) 2013年 9月 19日
User guide AN-2065 LM5119 Evaluation Board (Rev. B) 2013年 4月 24日
User guide AN-2103 LM5117 Evaluation Board (Rev. B) 2013年 4月 24日
Analog Design Journal 1Q 2012 Issue Analog Applications Journal 2012年 1月 31日
Analog Design Journal Benefits of a multiphase buck converter 2012年 1月 31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

LM5119EVAL — 適用於 LM5119 廣泛 Vin 雙同步降壓控制器的評估板

The LM5119EVAL evaluation board provides the design engineer with a fully functional dual output buck converter, employing the LM5119 Dual Emulated Current Mode Synchronous Buck Controller. The evaluation board is designed to provide both 10V and 5V outputs over an input range of 14V to 55V. Also (...)

使用指南: PDF
TI.com 無法提供
模擬型號

LM5119 PSpice Transient Model

SNVM383.ZIP (227 KB) - PSpice Model
下載
模擬型號

LM5119 Unencrypted PSpice Transient Model

SNVM961.ZIP (4 KB) - PSpice Model
下載
計算工具

LM25119-5119QUICK-CALC — LM(2)5119 快速入門計算機

下載
參考設計

PMP30464 — 適合受限空間的應用的 96-W/180-W 峰值雙交錯式降壓轉換器參考設計

This is a dual, interleaved buck converter reference design, which covers an input voltage range of 17.0 V to 60.0 V. The output voltage is 12.0 V with a maximum load current of 15.0 A. The design has been space optimized and supports an average load current of 8.0 A.
Test report: PDF
電路圖: PDF
參考設計

PMP20804 — 適用於企業系統伺服器的四分之一磚型雙相同步降壓轉換器參考設計

PMP20804 is a dual-phase synchronous buck converter reference design utilizing the LM5119 dual synchronous buck controller I.C. The design accepts an input voltage of 20V to 40V and provides a 12V output capable of supplying 33A of current to the load. This represents a power density design (...)
Test report: PDF
電路圖: PDF
參考設計

PMP30168 — 具有 24V DC 輸入和 12V DC 輸出的 280W 車用雙相同步降壓參考設計

This 280W two phase synchronous buck converter for automotive applications is designed for a nominal input voltage of 24V to 28V with support for cranking (down to 18V) and load dump < 58V. It provides up to 20A output current at an output voltage of 12 to 14V, which can be set externally (...)
Test report: PDF
電路圖: PDF
參考設計

PMP10260 — 24Vdc 輸入 (雙汽車電池) 汽車多相同步降壓參考設計

This high-efficiency, high-power reference design uses the LM5119 two-phase synchronous-buck controller to regulate 14.4V at 60A. This design can be used to supply single car battery power from a double battery system, often found in trucks. Features include input EMI filtering, output hot swap (...)
Test report: PDF
電路圖: PDF
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WQFN (RTV) 32 Ultra Librarian
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