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AC/DC & DC/DC controllers (external FET)

LM5117-Q1

現行

具類比電流監控器的汽車級 5.5-65V 大範圍 Vin 電流模式同步降壓控制器

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LM5141-Q1 現行 車用寬輸入 2.2-MHz 低 IQ 同步降壓控制器 Optional spread spectrum for improved EMI.
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 Improved performance

LM5117-Q1

現行
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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 Rating Automotive Vout (min) (V) 0.8 Vout (max) (V) 62 Iq (typ) (A) 0.0048 Duty cycle (max) (%) 98
Vin (min) (V) 5.5 Vin (max) (V) 65 Iout (max) (A) 20 Operating temperature range (°C) -40 to 125 Control mode current mode Rating Automotive Vout (min) (V) 0.8 Vout (max) (V) 62 Iq (typ) (A) 0.0048 Duty cycle (max) (%) 98
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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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
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016年 7月 21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 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

PMP30301 — 12V、80W 同步降壓參考設計

The PMP30301 reference design is based on the LM5117 sync buck converter; it supplies 12V @ 6.5A and it is protected against overcurrent at 7.4A. The internal bias can be supplied internally by means of internal linear regulator, or externally by BJT and Zener diode, thus reducing power (...)
Test report: PDF
電路圖: PDF
參考設計

PMP30189 — 24V、300W 同步降壓參考設計

The PMP30189 reference design is based on the LM5117 sync buck converter; it supplies 24V @ 11A and it is protected against overcurrent at 13.9A. The internal bias can be supplied internally by means of internal linear regulator, or externally by BJT and Zener diode, thus reducing power (...)
Test report: PDF
電路圖: PDF
參考設計

PMP20089 — 適用於小型裝置的寬輸入電壓同步降壓轉換器參考設計

The PMP20089 reference design has an input voltage range from 10V to 55Vin. The output is 4V @ 12 A and is optimized for efficiency and small solution size.
Test report: PDF
電路圖: PDF
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HTSSOP (PWP) 20 檢視選項
WQFN (RTW) 24 檢視選項
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