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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM25007

現行

9-42V 大範圍 Vin、0.5A 恒定導通時間非同步降壓穩壓器

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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
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LMR54410 現行 具 80-µA IQ 的 SIMPLE SWITCHER® 電源轉換器 4.5-V 至 36-V、1-A 同步降壓 Smaller footprint, lower quiescent current, FPWM and PFM options.

LM25007

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.5 Vin (min) (V) 9 Vin (max) (V) 42 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 800 Features Light Load Efficiency, Over Current Protection Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 37 Iq (typ) (µA) 500 Duty cycle (max) (%) 99
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.5 Vin (min) (V) 9 Vin (max) (V) 42 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 800 Features Light Load Efficiency, Over Current Protection Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 37 Iq (typ) (µA) 500 Duty cycle (max) (%) 99
VSSOP (DGK) 8 14.7 mm² 3 x 4.9 WSON (NGT) 8 16 mm² 4 x 4
  • Integrated 0.74Ω N-Channel MOSFET Switch
  • Guaranteed 0.5A Output Current
  • Ultra-Fast Transient Response
  • Up to 800kHz Operation
  • No Control Loop Compensation Required
  • Vin Feed Forward Provides Constant Operating Frequency
  • 2% Accurate 2.5V Feedback from -40°C to 125°C
  • Highly Efficient Operation
  • Intelligent Current Limit Protection
  • External Shutdown Control
  • Thermal Shutdown
  • VSSOP and Thermally Enhanced WSON Packages
  • Integrated 0.74Ω N-Channel MOSFET Switch
  • Guaranteed 0.5A Output Current
  • Ultra-Fast Transient Response
  • Up to 800kHz Operation
  • No Control Loop Compensation Required
  • Vin Feed Forward Provides Constant Operating Frequency
  • 2% Accurate 2.5V Feedback from -40°C to 125°C
  • Highly Efficient Operation
  • Intelligent Current Limit Protection
  • External Shutdown Control
  • Thermal Shutdown
  • VSSOP and Thermally Enhanced WSON Packages

The LM25007 is a monolithic step-down switching regulator featuring all of the functions needed to implement a low cost, efficient, power supply. Capable of driving a 0.5A load over a 9V-42V input voltage range, this device is easy to apply and is provided in the small VSSOP-8 and the thermally enhanced WSON-8 packages. Ultra-fast transient response is achieved through the use of a constant on-time architecture with Vin feed forward. This feature provides an almost constant operating frequency over load and input voltage variations. The operating frequency can be adjusted with a single resistor. This architecture is easy to use and tolerant of component selection. An intelligent current limit is implemented in the LM25007 with forced off time that is inversely proportional to Vout thus ensuring recovery from fault conditions. The output voltage may be set from 2.5V to >30V. To improve efficiency in light load applications, the Vcc pin can be connected to an external voltage source to eliminate the drop through the internal regulator. Additional features include: thermal shutdown, Vcc under-voltage lockout, gate drive under-voltage lockout, and max duty cycle limiter.

The LM25007 is a monolithic step-down switching regulator featuring all of the functions needed to implement a low cost, efficient, power supply. Capable of driving a 0.5A load over a 9V-42V input voltage range, this device is easy to apply and is provided in the small VSSOP-8 and the thermally enhanced WSON-8 packages. Ultra-fast transient response is achieved through the use of a constant on-time architecture with Vin feed forward. This feature provides an almost constant operating frequency over load and input voltage variations. The operating frequency can be adjusted with a single resistor. This architecture is easy to use and tolerant of component selection. An intelligent current limit is implemented in the LM25007 with forced off time that is inversely proportional to Vout thus ensuring recovery from fault conditions. The output voltage may be set from 2.5V to >30V. To improve efficiency in light load applications, the Vcc pin can be connected to an external voltage source to eliminate the drop through the internal regulator. Additional features include: thermal shutdown, Vcc under-voltage lockout, gate drive under-voltage lockout, and max duty cycle limiter.
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技術文件

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類型 標題 日期
* Data sheet LM25007 42V, 0.5A Step-Down Switching Regulator datasheet (Rev. C) 2013年 2月 20日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Application note Analysis & Design of Hysteretic Constant Freq Buck Regr Using the LM5007 (Rev. B) 2013年 4月 30日
EVM User's guide AN-1453 LM25007 Evaluation Board (Rev. A) 2013年 4月 24日
Application note Boot Capacitor Regulation in LM25007 Constant-On-Time (COT) Converter (Rev. A) 2013年 4月 23日

設計與開發

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模擬型號

LM25007 PSpice Transient Model

SNVM245.ZIP (58 KB) - PSpice Model
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模擬型號

LM25007 Unencrypted PSpice Transient Model

SNVMAL3.ZIP (3 KB) - PSpice Model
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計算工具

LM25007QUICK-CALC — LM25007 快速入門計算機

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封裝 針腳 CAD 符號、佔位空間與 3D 模型
VSSOP (DGK) 8 Ultra Librarian
WSON (NGT) 8 Ultra Librarian
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