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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM2670

現行

具同步功能的 SIMPLE SWITCHER 高效 3A 降壓電壓穩壓器

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open-in-new 比較替代產品
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LMR51430 現行 具 40µA IQ 的 SIMPLE SWITCHER® 4.5V 至 36V、3A 同步降壓轉換器 Next-generation 3.8-V to 36-V, 3-A synchronous buck converter in SOT-23 package.
TLVM13630 現行 高密度、3-V 至 36-V 輸入、1-V 至 6-V 輸出、3-A 降壓電源模組 Save board space, simplify design and speed time to market with an integrated-inductor power module.

LM2670

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 40 Vin (min) (V) 6.5 Vout (max) (V) 37 Vout (min) (V) 1.23 Features Frequency synchronization, Over Current Protection Control mode Voltage mode Switching frequency (min) (kHz) 260 Switching frequency (max) (kHz) 400 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 4200 Duty cycle (max) (%) 91 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 40 Vin (min) (V) 6.5 Vout (max) (V) 37 Vout (min) (V) 1.23 Features Frequency synchronization, Over Current Protection Control mode Voltage mode Switching frequency (min) (kHz) 260 Switching frequency (max) (kHz) 400 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 4200 Duty cycle (max) (%) 91 Type Converter
TO-220 (NDZ) 7 82.6008 mm² 10.16 x 8.13 TO-263 (KTW) 7 153.924 mm² 10.1 x 15.24 VSON (NHM) 14 30 mm² 6 x 5
  • Efficiency up to 94%
  • Simple and easy to design with (using off-the-shelf external components)
  • 150mΩ DMOS output switch
  • 3.3V, 5V, 12V fixed output and adjustable (1.2V to 37V) versions
  • 50µA standby current when switched OFF
  • ±2% maximum output tolerance over full line and load conditions
  • 8V to 40V wide Input voltage range
  • External sync clock capability (280kHz to 400kHz)
  • 260kHz fixed frequency internal oscillator
  • –40 to 125°C operating junction temperature range
  • Create a custom design using the LM2670 with the WEBENCH® Power Designer
  • Efficiency up to 94%
  • Simple and easy to design with (using off-the-shelf external components)
  • 150mΩ DMOS output switch
  • 3.3V, 5V, 12V fixed output and adjustable (1.2V to 37V) versions
  • 50µA standby current when switched OFF
  • ±2% maximum output tolerance over full line and load conditions
  • 8V to 40V wide Input voltage range
  • External sync clock capability (280kHz to 400kHz)
  • 260kHz fixed frequency internal oscillator
  • –40 to 125°C operating junction temperature range
  • Create a custom design using the LM2670 with the WEBENCH® Power Designer

The LM2670 series of regulators are monolithic, integrated circuits, which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 3A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3V, 5V, and 12V output version.

The SIMPLE SWITCHER power converter concept provides for a complete design using a minimum number of external components. The switching clock frequency can be provided by an internal fixed frequency oscillator (260kHz) or from an externally provided clock in the range of 280kHz to 400kHz which allows the use of physically smaller sized components. A family of standard inductors for use with the LM2670 are available from several manufacturers to greatly simplify the design process. The external sync clock provides direct and precise control of the output ripple frequency for consistent filtering or frequency spectrum positioning.

The LM2670 series also has built-in thermal shutdown, current limiting, and an ON and OFF control input that can power down the regulator to a low 50µA quiescent current standby condition. The output voltage is specified to a ±2% tolerance.

The LM2670 series of regulators are monolithic, integrated circuits, which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 3A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3V, 5V, and 12V output version.

The SIMPLE SWITCHER power converter concept provides for a complete design using a minimum number of external components. The switching clock frequency can be provided by an internal fixed frequency oscillator (260kHz) or from an externally provided clock in the range of 280kHz to 400kHz which allows the use of physically smaller sized components. A family of standard inductors for use with the LM2670 are available from several manufacturers to greatly simplify the design process. The external sync clock provides direct and precise control of the output ripple frequency for consistent filtering or frequency spectrum positioning.

The LM2670 series also has built-in thermal shutdown, current limiting, and an ON and OFF control input that can power down the regulator to a low 50µA quiescent current standby condition. The output voltage is specified to a ±2% tolerance.
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類型 標題 日期
* Data sheet LM2670 SIMPLE SWITCHER® Power Converter, High-Efficiency, 3A, Step-Down Voltage Regulator With Sync datasheet (Rev. L) PDF | HTML 2025年 6月 25日
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024年 3月 25日
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014年 9月 12日
Application note AN-1187 Leadless Leadframe Package (LLP) (Rev. R) 2013年 5月 7日
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013年 4月 23日
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013年 4月 23日
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013年 4月 23日
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013年 4月 23日
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013年 4月 23日
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013年 4月 23日
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
Application note AN-1Positive-to-Negative Buck-Boost Converter Using LM267x SIMPLE SWITCHER (Rev. E) 2013年 4月 23日
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
Application note Simple Techniques Minimize Cross-Coupling in Distributed Power Systems 2007年 3月 21日
Application note Input and Output Capacitor Selection 2005年 9月 19日
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
Application note AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

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封裝 針腳 CAD 符號、佔位空間與 3D 模型
TO-220 (NDZ) 7 Ultra Librarian
TO-263 (KTW) 7 Ultra Librarian
VSON (NHM) 14 Ultra Librarian
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