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AC/DC 和 DC/DC 控制器 (外部 FET)

LM5117

現行

具類比電流監控器的 5.5-65V 大範圍 Vin 電流模式同步降壓控制器

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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
LM5141 現行 低 Iq、寬輸入範圍雙同步降壓控制器 Optional spread spectrum for improved EMI.

LM5117

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) 20 Operating temperature range (°C) -40 to 125 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 62 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Synchronous Rectification, Tracking, UVLO adjustable Iq (typ) (µA) 4800 Duty cycle (max) (%) 98 Number of phases 1
Vin (min) (V) 5.5 Vin (max) (V) 65 Iout (max) (A) 20 Operating temperature range (°C) -40 to 125 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 62 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Synchronous Rectification, Tracking, UVLO adjustable Iq (typ) (µA) 4800 Duty cycle (max) (%) 98 Number of phases 1
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4 WQFN (RTW) 24 16 mm² 4 x 4
  • LM5117-Q1 is Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: -40°C to 125°C
      Ambient Operating Temperature Range
  • Emulated Peak Current Mode Control
  • Wide Operating Range from 5.5 V to 65 V
  • Robust 3.3-A Peak Gate Drives
  • Adaptive Dead-Time Output Driver Control
  • Free-Run or Synchronizable Clock up to 750 kHz
  • Optional Diode Emulation Mode
  • Programmable Output from 0.8 V
  • Precision 1.5% Voltage Reference
  • Analog Current Monitor
  • Programmable Current Limit
  • Hiccup Mode Overcurrent Protection
  • Programmable Soft-Start and Tracking
  • Programmable Line Undervoltage Lockout
  • Programmable Switchover to External Bias Supply
  • Thermal Shutdown
  • LM5117-Q1 is Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: -40°C to 125°C
      Ambient Operating Temperature Range
  • Emulated Peak Current Mode Control
  • Wide Operating Range from 5.5 V to 65 V
  • Robust 3.3-A Peak Gate Drives
  • Adaptive Dead-Time Output Driver Control
  • Free-Run or Synchronizable Clock up to 750 kHz
  • Optional Diode Emulation Mode
  • Programmable Output from 0.8 V
  • Precision 1.5% Voltage Reference
  • Analog Current Monitor
  • Programmable Current Limit
  • Hiccup Mode Overcurrent Protection
  • Programmable Soft-Start and Tracking
  • Programmable Line Undervoltage Lockout
  • Programmable Switchover to External Bias Supply
  • Thermal Shutdown

The LM5117 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 utilizing 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 750 kHz. The LM5117 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 that allows external bias supply further improves efficiency. The LM5117’s unique analog telemetry feature provides average output current information. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit, and adjustable line undervoltage lockout.

The LM5117 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 utilizing 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 750 kHz. The LM5117 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 that allows external bias supply further improves efficiency. The LM5117’s unique analog telemetry feature provides average output current information. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit, and adjustable line undervoltage lockout.
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技術文件

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類型 標題 日期
* Data sheet LM5117/Q1 Wide Input Range Synchronous Buck Controller with Analog Current Monitor datasheet (Rev. F) PDF | HTML 2015年 8月 27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
Application note How to Design a Simple Constant Current/Constant Voltage Buck Converter 2018年 6月 26日
Technical article How to design a simple constant-current/constant-power/constant-voltage-regulating PDF | HTML 2018年 5月 2日
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016年 7月 21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
Application note Precision Output Current Limiting Using Average Current Monitor Feature 2011年 6月 21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

LM5117EVAL — LM5117 廣泛 Vin 同步降壓控制器評估模組

The LM5117 evaluation board provides the design engineer with a fully functional synchronous buck converter based on Emulated Current Mode Control to evaluate the LM5117 controller IC. The evaluation board provides 12V output with a 9A current capability in addition with average output current (...)

使用指南: PDF
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模擬型號

LM5117 PSpice Transient Model (Rev. A)

SNVM040A.ZIP (82 KB) - PSpice Model
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模擬型號

LM5117 TINA-TI Transient Reference Design (Rev. A)

SNVM619A.TSC (1077 KB) - TINA-TI Reference Design
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模擬型號

LM5117 TINA-TI Transient Spice Model (Rev. A)

SNVM620A.ZIP (30 KB) - TINA-TI Spice Model
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模擬型號

LM5117 Unencrypted PSpice Transient Model

SNVM960.ZIP (357 KB) - PSpice Model
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計算工具

LM5117QUICK-CALC — LM5117 快速入門計算機

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參考設計

PMP10852 — 高功率小型同步降壓至輸出 12V@15A 參考設計

The PMP10852 reference design uses the LM5117, CSD18563 for the high side MOSFET and CSD18532 (x2) for the low side MOSFETs.  PMP10852 takes input voltages between 27V to 41V and outputs 180W(12V @15A).  The size is very small, total area is 1,200mm2 (30mm x 40mm) solution size. The (...)
Test report: PDF
電路圖: PDF
參考設計

PMP20808 — 450W 高效 25V 降壓轉換器參考設計

PMP20808 is a single-phase synchronous cuck converter reference design using the LM5117 controller IC. The design accepts an input voltage of 36Vin to 40Vin (38Vin Nominal) and provides an output of 25Vout capable of supplying 18A of continuous current to the load. The design was built on the (...)
Test report: PDF
電路圖: PDF
參考設計

PMP20904 — 適合工業應用的 100W 負輸出電源供應參考設計

The PMP20904 reference design is a negative buck utilizing the LM5117 controller for industrial applications. This design can operate at 24Vin at +/-10%. The design has an output of -24V and capable of sourcing 2A continuous current and up to 4A transient. Switching frequency is set to (...)
Test report: PDF
電路圖: PDF
參考設計

PMP10852B — 高功率小型同步降壓至輸出 12V@15A 參考設計

The PMP10852B reference design uses the LM5117, CSD18563 for the high side MOSFET and CSD18532 (x2) for the low side MOSFETs.  PMP10852B takes input voltages between 27V to 41V and outputs 180W(12V @15A).  The size is very small, total area is 1,200mm2 (30mm x 40mm) solution size. The (...)
Test report: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTSSOP (PWP) 20 Ultra Librarian
WQFN (RTW) 24 Ultra Librarian
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