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LM25018

現行

7.5-48V 大範圍 VIN 300mA 固定導通時間同步降壓穩壓器

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產品規格表

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引腳對引腳且具備與所比較裝置相同的功能
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.

LM25018

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) 0.3 Vin (max) (V) 48 Vin (min) (V) 7.5 Vout (max) (V) 40 Vout (min) (V) 1.25 Switch current limit (typ) (A) 0.7 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) 0.3 Vin (max) (V) 48 Vin (min) (V) 7.5 Vout (max) (V) 40 Vout (min) (V) 1.25 Switch current limit (typ) (A) 0.7 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 x 6 WSON (NGU) 8 16 mm² 4 x 4
  • Wide 7.5-V to 48-V input range
  • Integrated 325-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
  • Create a custom design using the LM25018 with the WEBENCH Power Designer
  • Wide 7.5-V to 48-V input range
  • Integrated 325-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
  • Create a custom design using the LM25018 with the WEBENCH Power Designer

The LM25018 device is a 48-V, 325-mA synchronous step-down regulator with integrated high-side and low-side MOSFETs. The constant on-time (COT) control scheme employed in the LM25018 device 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 startup 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 LM25018 device is available in WSON-8 and SO Power PAD-8 plastic packages.

The LM25018 device is a 48-V, 325-mA synchronous step-down regulator with integrated high-side and low-side MOSFETs. The constant on-time (COT) control scheme employed in the LM25018 device 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 startup 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 LM25018 device is available in WSON-8 and SO Power PAD-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 日期
* Data sheet LM25018 48-V, 325-mA Constant On-Time Synchronous Buck/Fly-Buck™ Regulator datasheet (Rev. G) PDF | HTML 2021年 5月 24日
Product overview Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications (Rev. A) PDF | HTML 2024年 8月 20日
Selection guide Buck Converter Quick Reference Guide (Rev. B) 2021年 4月 8日
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 2019年 4月 10日
Application note Stability Analysis and Design of COT Type-3 Ripple Circuit 2019年 3月 20日
Technical article Create a Fly-Buck™ converter in WEBENCH® Power Designer PDF | HTML 2015年 10月 9日
Analog Design Journal Fly-Buck(TM) converter provides EMC and isolation in PLC applications 2015年 1月 29日
Application note AN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C) 2014年 12月 17日
Product overview Fly-Buck™ Solution 2013年 11月 19日
User guide LM25018 Isolated Buck (FlyBuck) User's Guide 2013年 6月 20日
EVM User's guide AN-2237 LM5018 Buck Evaluation Board (Rev. A) 2013年 4月 30日
EVM User's guide AN-2239 LM5018 Isolated Evaluation Board (Rev. A) 2013年 4月 30日
User guide LM25018 Buck Evaluation Board 2013年 4月 3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

LM5018EVAL — LM5018 寬輸入電壓同步降壓穩壓器評估板

The LM5018 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 100V.
使用指南: PDF
TI.com 無法提供
開發板

LM5018ISOEVAL — LM5018 隔離偏壓電源評估板

An isolated bias supply is implemented in this evaluation board with the LM5018 Constant-On-Time (COT) regulator. The LM5018 regulator integrates both the high and low side power switches essential for creating an isolated buck converter.
使用指南: PDF
TI.com 無法提供
模擬型號

LM25018 PSpice Transient Model

SNVM210.ZIP (40 KB) - PSpice Model
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模擬型號

LM25018 Unencrypted PSpice Model

SNVM833.ZIP (2 KB) - PSpice Model
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計算工具

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

This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.

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參考設計

TIDA-01093 — 適用於 20 節串聯電池應用的工業電池管理模組參考設計

高序列電池芯數電池 (>15s) 系統在工業應用中變得越來越普遍。這類應用注重成本效益，需要簡單的解決方案，包括監控、保護及控制，甚至是 SOC（充電狀態）資訊，而不僅僅是基本的獨立硬體保護。此設計為完整的電池組端解決方案提供平台。bq76930 整合了所有獨立硬體保護功能，並實作了穩健的通訊介面，供主機裝置讀取電池資訊。
Design guide: PDF
電路圖: PDF
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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