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AC/DC 和 DC/DC 控制器 (外部 FET)

LM5116

現行

6-100V 大範圍 Vin 電流模式同步降壓控制器

立即訂購
產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同，但引腳輸出與所比較的裝置不同
LM5146 現行 具寬占空比範圍的 100-V 同步降壓 DC/DC 控制器 Smaller device footprint optimized for EMI requirements.

LM5116

現行
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 6 Vin (max) (V) 100 Iout (max) (A) 20 Operating temperature range (°C) -40 to 150 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 1.215 Vout (max) (V) 80 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 4600 Duty cycle (max) (%) 98 Number of phases 1
Vin (min) (V) 6 Vin (max) (V) 100 Iout (max) (A) 20 Operating temperature range (°C) -40 to 150 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 1.215 Vout (max) (V) 80 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 4600 Duty cycle (max) (%) 98 Number of phases 1
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4
  • New, similar products available:
    • LM5148 80-V synchronous buck controller with ultra-low IQ and DRSS
    • LM5149 80-V synchronous buck controller with ultra-low IQ and AEF
  • Emulated peak current mode
  • Wide operating range up to 100 V
  • Low I Q shutdown (< 10 µA)
  • Drives standard or logic level MOSFETs
  • Robust 3.5-A peak gate drive
  • Free-run or synchronous operation to 1 MHz
  • Optional diode emulation mode
  • Programmable output from 1.215 V to 80 V
  • Precision 1.5% voltage reference
  • Programmable current limit
  • Programmable soft start
  • Programmable line undervoltage lockout
  • Automatic switch to external bias supply
  • HTSSOP-20 exposed pad
  • Thermal shutdown
  • Create a custom design using the LM5116 with the WEBENCH Power Designer
  • New, similar products available:
    • LM5148 80-V synchronous buck controller with ultra-low IQ and DRSS
    • LM5149 80-V synchronous buck controller with ultra-low IQ and AEF
  • Emulated peak current mode
  • Wide operating range up to 100 V
  • Low I Q shutdown (< 10 µA)
  • Drives standard or logic level MOSFETs
  • Robust 3.5-A peak gate drive
  • Free-run or synchronous operation to 1 MHz
  • Optional diode emulation mode
  • Programmable output from 1.215 V to 80 V
  • Precision 1.5% voltage reference
  • Programmable current limit
  • Programmable soft start
  • Programmable line undervoltage lockout
  • Automatic switch to external bias supply
  • HTSSOP-20 exposed pad
  • Thermal shutdown
  • Create a custom design using the LM5116 with the WEBENCH Power Designer

The LM5116 is a 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 feed-forward, 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 operating frequency is programmable from 50 kHz to 1 MHz. The LM5116 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 low quiescent current shutdown disables the controller and consumes less than 10 µA of total input current.

Additional features include a high-voltage bias regulator, automatic switch-over to external bias for improved efficiency, thermal shutdown, frequency synchronization, cycle-by-cycle current limit, and adjustable line undervoltage lockout. The device is available in a power enhanced HTSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation.

New products (LM5148 and LM5149) offer reduced BOM cost, higher efficiency, and reduced design size among many other features.

The LM5116 is a 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 feed-forward, 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 operating frequency is programmable from 50 kHz to 1 MHz. The LM5116 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 low quiescent current shutdown disables the controller and consumes less than 10 µA of total input current.

Additional features include a high-voltage bias regulator, automatic switch-over to external bias for improved efficiency, thermal shutdown, frequency synchronization, cycle-by-cycle current limit, and adjustable line undervoltage lockout. The device is available in a power enhanced HTSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation.

New products (LM5148 and LM5149) offer reduced BOM cost, higher efficiency, and reduced design size among many other features.

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技術文件

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類型 標題 日期
* Data sheet LM5116 Wide Range Synchronous Buck Controller datasheet (Rev. I) PDF | HTML 2023年 11月 3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
Selection guide DC/DC Buck Controller Solutions Selection Guide 2018年 2月 6日
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016年 7月 21日
White paper Choosing the Right Fixed Frequency Buck Regulator Control Strategy 2015年 10月 2日
White paper Choosing the Right Fixed Frequency Buck Regulator Control Strategy (PPT) 2015年 10月 2日
White paper Wide VIN power management ICs simplify white paper (Rev. A) 2013年 9月 19日
EVM User's guide AN-1596 LM5116 Evaluation Board (Rev. C) 2013年 4月 24日
EVM User's guide AN-1713 LM5116-12 Evaluation Board (Rev. A) 2013年 4月 24日
Application note Minimizing FET Losses For a High Input Rail Buck Converter (Rev. A) 2013年 4月 23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

LM5116-12EVAL — LM5116-12 評估板

The LM5116-12 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM5116 controller IC. The evaluation board provides a 12V output with a 5A current capability. The operating input voltage ranges (...)

使用指南: PDF
TI.com 無法提供
開發板

LM5116EVAL — LM5116 寬輸入電壓同步降壓控制器評估模組

LM5116 Wide Range Synchronous Buck Controller

使用指南: PDF
TI.com 無法提供
模擬型號

LM5116 PSpice Average Model

SNVM346.ZIP (53 KB) - PSpice Model
下載
模擬型號

LM5116 PSpice Transient Model (Rev. C)

SNVM345C.ZIP (101 KB) - PSpice Model
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模擬型號

LM5116 TINA-TI Transient Reference Design (Rev. B)

SNVM051B.TSC (159 KB) - TINA-TI Reference Design
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模擬型號

LM5116 TINA-TI Transient Spice Model (Rev. B)

SNVM052B.ZIP (15 KB) - TINA-TI Spice Model
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模擬型號

LM5116 Unencrypted PSpice Average Model

SNVM959.ZIP (2 KB) - PSpice Model
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模擬型號

LM5116 Unencrypted PSpice Transient Model (Rev. A)

SNVM958A.ZIP (6 KB) - PSpice Model
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計算工具

LM5116-5116WG-25116DESIGN-CALC — LM(2)5116/WG 快速入門元件計算機

Welcome to the LM5116, LM5116WG and LM25116 Quickstart Design Tool. This standalone tool assists the power supply engineer with the design of a DC/DC buck regulator based on a synchronous buck controller from this product family. As such, the user can expeditiously arrive at an optimized design to (...)
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參考設計

PMP11257 — 4 級 PoE 同步降壓轉換器 (12V/2A) 參考設計

The LM5116 synchronous buck controller provides a high efficiency solution for non-isolated PoE PD applications.  The TPS2378 PoE PD controller performs all necessary functions for an IEEE802.3at compliant Class 4 PoE PD.  This converter is ideal for any PoE application that demands best (...)
Test report: PDF
電路圖: PDF
參考設計

PMP9581_REVB — 具有耦合電感器的 40W 同步 ZETA 轉換器參考設計

This coupled-inductor, 13.2V at 4A, synchronous ZETA converter achieves greater than 95% efficiency at full load. It is capable of 5A out for Vin greater than 10V. It utilizes all surface mount components, maintains a low temperature rise and is capable of high peak load transients. See PMP9581 (...)
Test report: PDF
電路圖: PDF
參考設計

PMP9581_REVC — 具有兩個電感器的 40W 同步 ZETA 轉換器參考設計

This dual-inductor, 13.2V at 4A, synchronous ZETA converter achieves greater than 93% efficiency at full load. It is capable of 5A out for Vin greater than 10V. It utilizes all surface mount components, maintains a low temperature rise and is capable of high peak load transients.  See PMP9581 (...)
Test report: PDF
電路圖: PDF
參考設計

PMP7282 — 具有 97% 效率的 35V 至 60V 輸入和 600W 輸出雙相降壓轉換器參考設計

此 600W 寬電壓輸入雙相電源轉換器使用兩個 180 度異相的模擬電流模式控制器，將輸入和輸出漣波電流降到最低。相較於傳統的隔離式電源轉換器，此同步降壓架構可在更高的效率層級提供更小的尺寸與更低的 BOM 成本，在多種操作條件下皆可達 97% 以上。
Test report: PDF
電路圖: PDF
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HTSSOP (PWP) 20 Ultra Librarian
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