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LM25019

現行

7.5-48V 大範圍 VIN 100mA 固定導通時間同步降壓穩壓器

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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.

LM25019

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck, Flybuck Iout (max) (A) 0.1 Vin (max) (V) 48 Vin (min) (V) 7.5 Vout (max) (V) 40 Vout (min) (V) 1.25 Switch current limit (typ) (A) 0.3 Features Synchronous rectification Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 Duty cycle (max) (%) 90
Rating Catalog Topology Buck, Flybuck Iout (max) (A) 0.1 Vin (max) (V) 48 Vin (min) (V) 7.5 Vout (max) (V) 40 Vout (min) (V) 1.25 Switch current limit (typ) (A) 0.3 Features Synchronous rectification Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 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 48-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™
  • Wide 7.5-V to 48-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™

The LM25019 is a 48-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 LM25019 requires no loop compensation, provides excellent transient response, and enables very high 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 LM25019 is available in 8-pin WSON and 8-pin SO PowerPAD plastic packages.

The LM25019 is a 48-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 LM25019 requires no loop compensation, provides excellent transient response, and enables very high 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 LM25019 is available in 8-pin WSON and 8-pin SO PowerPAD plastic packages.
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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 LM25019 48-V, 100-mA Constant On-Time Synchronous Buck / Fly-Buck™ Regulator datasheet (Rev. F) PDF | HTML 2021/5/24
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
白皮書 Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 2019/4/10
技術文章 Create a Fly-Buck™ converter in WEBENCH® Power Designer PDF | HTML 2015/10/9
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
使用指南 LM5019 Buck Evaluation Board (Rev. A) 2013/4/30

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

LM25019MR-EVM — LM25019 寬輸入電壓同步降壓穩壓器評估模組

The LM25019MR-EVM evaluation board provides the design engineer with a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 10V output over an input range of 12.5V to 48V.
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

LM25019 PSpice Transient Model

SNVM211.ZIP (40 KB) - PSpice 模型
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模擬型號

LM25019 TINA-TI Reference Design

SNVMAH1.TSC (148 KB) - TINA-TI 參考設計
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模擬型號

LM25019 TINA-TI Transient Spice Model

SNVMAH2.ZIP (15 KB) - TINA-TI Spice 模型
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模擬型號

LM25019 Unencrypted PSpice Transient Model

SNVMAM3.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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參考設計

TIDA-010044 — 具有故障保護和診斷的 NAMUR PLC 數位輸入參考設計

NAMUR 近距感測器廣泛用於工業控制，以滿足感測器對最大能量的特殊要求。這又要求 PLC 數位輸入在準確度和可靠性方面有特殊要求，設計用於介接此類感測器。此參考設計為相容於 NAMUR 感測器的數位輸入完整前端。此設計展示了經由緊湊的空間內冗餘、故障保護及廣泛的診斷功能所實現的可靠性。
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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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