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LM5019

現行

7.5-100V 大範圍 VIN 100mA 固定導通時間同步降壓穩壓器

現在提供此產品的更新版本

open-in-new 比較替代產品
針腳對針腳的功能與所比較的裝置相同。
LM5168 現行 具有 Fly-Buck™ 功能的 6-V 至 120-V 大範圍 VIN、300-mA DC-DC 轉換器 FPWM and PFM mode option and low IQ.

產品詳細資料

Rating Catalog Topology Buck, Flybuck Iout (max) (A) 0.1 Vin (max) (V) 100 Vin (min) (V) 7.5 Vout (max) (V) 90 Vout (min) (V) 1.25 Switch current limit (typ) (A) 0.3 Features Enable, Synchronous rectification, UVLO adjustable Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00005 Duty cycle (max) (%) 90
Rating Catalog Topology Buck, Flybuck Iout (max) (A) 0.1 Vin (max) (V) 100 Vin (min) (V) 7.5 Vout (max) (V) 90 Vout (min) (V) 1.25 Switch current limit (typ) (A) 0.3 Features Enable, Synchronous rectification, UVLO adjustable Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00005 Duty cycle (max) (%) 90
HSOIC (DDA) 8 29.4 mm² (4.9 mm × 6 mm) WSON (NGU) 8 16 mm² (4 mm × 4 mm)
  • Wide 7.5-V to 100-V input range
  • Integrated 100-mA high-side and low-side switches
  • No schottky required
  • Constant on-time control
  • No loop compensation required
  • Ultra-fast transient response
  • Nearly constant operating frequency
  • Intelligent peak current limit
  • Adjustable output voltage from 1.225 V
  • Precision 2% feedback reference
  • Frequency adjustable to 1 MHz
  • Adjustable undervoltage lockout
  • Remote shutdown
  • Thermal shutdown
  • Packages:
    • 8-Pin WSON
    • 8-Pin SO PowerPAD
  • Create a custom design using the LM5019 with the WEBENCH Power Designer
  • Wide 7.5-V to 100-V input range
  • Integrated 100-mA high-side and low-side switches
  • No schottky required
  • Constant on-time control
  • No loop compensation required
  • Ultra-fast transient response
  • Nearly constant operating frequency
  • Intelligent peak current limit
  • Adjustable output voltage from 1.225 V
  • Precision 2% feedback reference
  • Frequency adjustable to 1 MHz
  • Adjustable undervoltage lockout
  • Remote shutdown
  • Thermal shutdown
  • Packages:
    • 8-Pin WSON
    • 8-Pin SO PowerPAD
  • Create a custom design using the LM5019 with the WEBENCH Power Designer

The LM5019 is a 100-V, 100-mA synchronous step-down regulator with integrated high-side and low-side MOSFETs. The constant-on-time (COT) control scheme employed in the LM5019 requires no loop compensation, provides excellent transient response, and enables very low step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high-voltage start-up regulator provides bias power for internal operation of the IC and for integrated gate drivers.

A peak current limit circuit protects against overload conditions. The undervoltage lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independently programmed. Other protection features include thermal shutdown and bias supply undervoltage lockout.

The LM5019 device is available in WSON-8 and SO PowerPAD-8 plastic packages.

The LM5019 is a 100-V, 100-mA synchronous step-down regulator with integrated high-side and low-side MOSFETs. The constant-on-time (COT) control scheme employed in the LM5019 requires no loop compensation, provides excellent transient response, and enables very low step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high-voltage start-up regulator provides bias power for internal operation of the IC and for integrated gate drivers.

A peak current limit circuit protects against overload conditions. The undervoltage lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independently programmed. Other protection features include thermal shutdown and bias supply undervoltage lockout.

The LM5019 device is available in WSON-8 and SO PowerPAD-8 plastic packages.

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技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LM5019 100-V, 100-mA Constant On-Time Synchronous Buck / Fly-Buck™ Regulator datasheet (Rev. H) PDF | HTML 2021/8/12
Product overview Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications (Rev. A) PDF | HTML 2024/8/20
選擇指南 Buck Converter Quick Reference Guide (Rev. B) 2021/4/8
功能安全資訊 LM26420-Q1 Functional Safety FIT Rate and Failure Mode Distribution 2020/2/17
白皮書 Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 2019/4/10
Application brief Powering Drones With a Wide VIN DC-DC Converter (Rev. A) 2019/2/5
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25
技術文章 Simplifying 100V wide VIN power conversion PDF | HTML 2016/11/11
技術文章 Create a Fly-Buck™ converter in WEBENCH® Power Designer PDF | HTML 2015/10/9
白皮書 Designing isolated rails on the fly with Fly-Buck™ converters 2015/9/29
類比設計期刊 Fly-Buck(TM) converter provides EMC and isolation in PLC applications 2015/1/29
應用說明 AN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C) 2014/12/17
Product overview Fly-Buck™ Solution 2013/11/19
白皮書 Wide VIN power management ICs simplify white paper (Rev. A) 2013/9/19
使用指南 LM5019 Buck Evaluation Board (Rev. A) 2013/4/30
更多文件說明 High-Voltage PoL Power Solutions 2012/1/30

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

BOOST-PSEMTHR8-097 — TPS23882 Type-3、30W、2 對、PSE 主機板 (用於 8 埠 PSE 系統)

此主機板是 PSE 控制器生態系統的基板。可使用主機板 (BOOST-PSEMTHR8-097) 和 TPS23882EVM 子卡 (TPS23882EVM-008) (另售) 評估八通道 TPS23882 和 IEEE 802.3bt 就緒 PoE PSE 控制器。完整的 PoE 評估生態系統包含以下項目:

  • TPS23882 評估系統
使用指南: PDF
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開發板

LM5019EVAL — LM5019 廣泛 Vin 同步降壓穩壓器評估板

The LM5019 evaluation board provides the designer with a fully functional buck regulator employing the constant on-time (COT) operating principle. The evaluation board provides a 10V output over an input range of 12.5V to 100V.
使用指南: PDF
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開發板

LM5019ISOEVAL — LM5019 隔離偏壓電源評估板

The LM5019ISOEVAL evaluation board facilitates evaluation of the LM5019 100V, 100mA Constant On-Time Synchronous Buck Regulator. An isolated bias supply is implemented in this evaluation board with the LM5019 the Constant On-Time regulator. The LM5019 regulator integrates both the high and low (...)
使用指南: PDF
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模擬型號

LM5019 PSpice Transient Model

SNVM045.ZIP (39 KB) - PSpice 模型
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模擬型號

LM5019 Unencrypted PSpice Transient Model

SNVMAM4.ZIP (2 KB) - PSpice 模型
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計算工具

FLYBUCK-FLYBACK-DESIGN-CALC — Flybuck / Flyback Calculator

此工具協助電源供應工程師根據規格選擇正確的隔離式 DC-DC 拓撲結構。根據選擇的拓撲結構,計算機還會推薦適合設計的 IC。

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計算工具

LM5019QUICK-CALC — LM5019 Buck Regulator Quick Start Component Calculator

LM5019 Quick Start Calculator is an easy to use excel based design tool for LM5019 based buck converter design. The design tool has all the design equations embedded and an example default design. The user can modify the design input parameters such as the input voltage range, output voltage, load (...)

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參考設計

TIDA-00120 — 太陽能 MPPT 充電控制器參考設計

此設計為 20A 最大功率點追蹤 (MPPT) 太陽能充電控制器,專為對應 12V 與 24V 面板的太陽能面板輸入所打造。此設計是針對中小型功耗太陽能充電器量身打造,可搭配 12V/24V 面板和 12V/24V 電池運作,且可提供高達 20A 的輸出電流。此設計以可擴展性為考量,只要將 MOSFET 變更為 100V 額定零件,即可輕鬆適應 48V 系統。使用者也可運用目前採用相同 MOSFET 的 TO-220 封裝版本,將電流增加至 40A。太陽能 MPPT 充電控制器是專為現實環境考量所設計,其中包括反向電池保護,以及軟體程式設計警報與指示 (若硬體保持未設定狀態)。此設計在 (...)

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參考設計

TIDA-01411 — 2 型 PoE PSE、6kV 雷擊突波參考設計

此參考設計以 TI TPS23861 PSE 控制器為基礎,為乙太網路供電 (PoE) 供電設備 (PSE) 系統提供雷擊突波防護解決方案。實作此類保護的需要通常取決於 PSE 的工作環境和 PSE 固有的隔離特性。對工業(NVR、DVR 等)與電信(乙太網路交換器、閘道等)應用而言,雷電突波防護是系統的重要設計考量。
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
HSOIC (DDA) 8 Ultra Librarian
WSON (NGU) 8 Ultra Librarian

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