LM2671 - 具有多种特性的 SIMPLE SWITCHER 电源转换器高效 500mA 降压电压稳压器

LM2671是TI德州仪器公司的一款转换器（集成开关）产品，LM2671是具有多种特性的 SIMPLE SWITCHER 电源转换器高效 500mA 降压电压稳压器，本站介绍了LM2671的封装应用图解、特点和优点、功能等，并给出了与LM2671相关的TI元器件型号供参考。

LM2671 - 具有多种特性的 SIMPLE SWITCHER 电源转换器高效 500mA 降压电压稳压器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM2671 series of regulators are monolithic integrated circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 500mA load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5.0V, 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 (Patent Nos. 5,382,918 and 5,514,947), fixed frequency oscillator, external shutdown, soft-start, and frequency synchronization.

The LM2671 series operates at a switching frequency of 260 kHz, thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Because of its 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 LM2671 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 datasheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies.

Other features include a ensured ±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 50 μA stand-by current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions.

To simplify the LM2671 buck regulator design procedure, there exists computer design software, (version 6.0).

产品特性

Efficiency up to 96%
Available in SOIC, 8-pin PDIP and WSON Packages
Computer Design Software (version 6.0)
Simple and Easy to Design With
Requires Only 5 external Components
Uses Readily Available Standard Inductors
3.3V, 5.0V, 12V, and Adjustable Output Versions
Adjustable Version Output Voltage Range: 1.21V to 37V
±1.5% Max Output Voltage Tolerance Over Line and Load Conditions
Ensured 500mA Output Load Current
0.25? DMOS Output Switch
Wide Input Voltage Range: 8V to 40V
260 kHz Fixed Frequency Internal Oscillator
TTL Shutdown Capability, Low Power Standby Mode
Soft-Start and Frequency Synchronization
Thermal Shutdown and Current Limit Protection

SIMPLE SWITCHER is a trademark of Texas Instruments. All trademarks are the property of their respective owners. SIMPLE SWITCHER is a trademark of Texas Instruments. WEBENCH is a trademark of Texas Instruments. Windows is a trademark of Texas Instruments.

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