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LM2675

現行

SIMPLE SWITCHER® 6.5V 至 40V、1A 低零組件數降壓穩壓器

立即訂購
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
功能相同，但針腳輸出與所比較的裝置不同。
LMR43610 現行 具有低 IQ 的 3-V 至 36-V、1-A 低 EMI 同步降壓穩壓器 New converter with low IQ and smaller size
TLVM13620 現行 採用 4-mm x 6-mm x 1.8-mm 封裝的 3.6-V 至 36-V 輸入、1-V 至 6-V 輸出、2-A 降壓模組 Save board space, simplify design and speed time to market with an integrated-inductor power module.
LMR54410 現行 4V 至 36V、1A、80µA Iq 同步 SIMPLE SWITCHER® 電源轉換器 Newer converter with better feature set
LMZM23601 現行 採用 3.8-mm × 3-mm 封裝的 36-V、1-A 降壓 DC-DC 電源模組 Small solution size module
TPSM33615 現行 3-V 至 36-V 輸入、1 至 15-V 輸出、1.5-A 同步降壓電源模組 Smaller design with an integrated-inductor power module.

LM2675

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 1 Vin (max) (V) 40 Vin (min) (V) 6.5 Vout (max) (V) 37 Vout (min) (V) 1.23 Features Enable, Overcurrent protection Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0025 Duty cycle (max) (%) 95
Rating Catalog Topology Buck Iout (max) (A) 1 Vin (max) (V) 40 Vin (min) (V) 6.5 Vout (max) (V) 37 Vout (min) (V) 1.23 Features Enable, Overcurrent protection Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0025 Duty cycle (max) (%) 95
PDIP (P) 8 92.5083 mm² (9.81 mm × 9.43 mm) WSON (NHN) 16 25 mm² (5 mm × 5 mm) SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • Efficiency up to 96%
  • Available in 8-pin SOIC, PDIP, and 16-pin WSON package
  • Requires only 5 external components
  • 3.3V, 5V, 12V, and adjustable output versions
  • 1.21V to 37V adjustable version output voltage range
  • ±1.5% maximum output voltage tolerance over line and load conditions
  • Specified 1A output load current
  • 8V to 40V wide input voltage range
  • 260kHz fixed frequency internal oscillator
  • TTL shutdown capability, low-power standby mode
  • Thermal shutdown and current limit protection
  • Create a custom design using the LM2675 with the WEBENCH® Power Designer
  • Efficiency up to 96%
  • Available in 8-pin SOIC, PDIP, and 16-pin WSON package
  • Requires only 5 external components
  • 3.3V, 5V, 12V, and adjustable output versions
  • 1.21V to 37V adjustable version output voltage range
  • ±1.5% maximum output voltage tolerance over line and load conditions
  • Specified 1A output load current
  • 8V to 40V wide input voltage range
  • 260kHz fixed frequency internal oscillator
  • TTL shutdown capability, low-power standby mode
  • Thermal shutdown and current limit protection
  • Create a custom design using the LM2675 with the WEBENCH® Power Designer

The LM2675 series of regulators are monolithic integrated DC-DC converter circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include patented internal frequency compensation and a fixed frequency oscillator.

The LM2675 series operates at a switching frequency of 260kHz, thus allowing smaller-sized filter components than what is needed with lower frequency switching regulators. Because of the very high efficiency (> 90%), the copper traces on the printed-circuit board are the only heat sinking needed.

A family of standard inductors for use with the LM2675 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also included in the data sheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies.

Other features include ±1.5%-tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring typically 50µA stand-by current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions.

The LM2675 series of regulators are monolithic integrated DC-DC converter circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include patented internal frequency compensation and a fixed frequency oscillator.

The LM2675 series operates at a switching frequency of 260kHz, thus allowing smaller-sized filter components than what is needed with lower frequency switching regulators. Because of the very high efficiency (> 90%), the copper traces on the printed-circuit board are the only heat sinking needed.

A family of standard inductors for use with the LM2675 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also included in the data sheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies.

Other features include ±1.5%-tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring typically 50µA stand-by current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions.
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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 LM2675 SIMPLE SWITCHER® Power Converter, High-Efficiency, 1A, Step-Down Voltage Regulator datasheet (Rev. G) PDF | HTML 2025/6/25
應用說明 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024/3/25
技術文章 How to increase system reliability and simplify design using DC/DC converters PDF | HTML 2016/6/13
技術文章 The importance of accurate switching frequency and current limit when selecting bu PDF | HTML 2016/4/19
技術文章 Advantages of leaded packages in robust industrial designs PDF | HTML 2016/3/8
應用說明 Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014/9/12
應用說明 AN-1187 Leadless Leadframe Package (LLP) (Rev. R) 2013/5/7
EVM User's guide LM2675 5.0EVAL 1A Step-Down High-Efficiency SIMPLE SWITCHER Eval Brd (Rev. C) 2013/4/24
應用說明 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013/4/24
應用說明 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013/4/23
應用說明 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013/4/23
應用說明 AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013/4/23
應用說明 AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013/4/23
應用說明 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013/4/23
應用說明 AN-1Positive-to-Negative Buck-Boost Converter Using LM267x SIMPLE SWITCHER (Rev. E) 2013/4/23
應用說明 AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013/4/23
應用說明 AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013/4/23
應用說明 AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013/4/23
應用說明 Simple Techniques Minimize Cross-Coupling in Distributed Power Systems 2007/3/21
應用說明 Input and Output Capacitor Selection 2005/9/19
更多文件說明 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005/7/12
應用說明 AN-643 EMI/RFI Board Design (Rev. B) 2004/5/3

設計與開發

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開發板

LM2675-5.0EVAL — SIMPLE SWITCHER 電源轉換器高效 1A 降壓電壓穩壓器評估模組

Amp Step-Down High-Efficency SIMPLE SWITCHER Evaluation Board.

The LM2675 SIMPLE SWITCHER step-down regulator provides all the active functions for a step-down regulator capable of driving a 1A load. Switching frequency is internally set to 260 kHz, allowing smaller-sized filter components than (...)

使用指南: PDF
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模擬型號

LM2675-ADJ PSpice Transient Model

SNVM533.ZIP (226 KB) - PSpice 模型
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模擬型號

LM2675-ADJ TINA-TI Load Transient Reference Design

SNVMAT3.TSC (776 KB) - TINA-TI 參考設計
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模擬型號

LM2675-ADJ TINA-TI Startup Reference Design

SNVMAT4.TSC (782 KB) - TINA-TI 參考設計
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模擬型號

LM2675-ADJ TINA-TI Transient Spice Model

SNVMAT5.ZIP (57 KB) - TINA-TI Spice 模型
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模擬型號

LM2675-ADJ Unencrypted PSpice Transient Model

SNVM876.ZIP (2 KB) - PSpice 模型
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
PDIP (P) 8 Ultra Librarian
WSON (NHN) 16 Ultra Librarian
SOIC (D) 8 Ultra Librarian
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