LM2596 - SIMPLE SWITCHER? 4.5V 至 40V、3A 降压稳压器，仅需 4 个外部组件

LM2596是TI德州仪器公司的一款转换器（集成开关）产品，LM2596是SIMPLE SWITCHER? 4.5V 至 40V、3A 降压稳压器，仅需 4 个外部组件，本站介绍了LM2596的封装应用图解、特点和优点、功能等，并给出了与LM2596相关的TI元器件型号供参考。

LM2596 - SIMPLE SWITCHER? 4.5V 至 40V、3A 降压稳压器，仅需 4 个外部组件 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3A load 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 internal frequency compensation , and a fixed-frequency oscillator.

The LM2596 series operates at a switching frequency of 150 kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Available in a standard 5-lead TO-220 package with several different lead bend options, and a 5-lead TO-263 surface mount package.

A standard series of inductors are available from several different manufacturers optimized for use with the LM2596 series. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a ensured ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 80μA standby current. Self protection features include a two stage frequency reducing current limit for the output switch and an over temperature shutdown for complete protection under fault conditions. † Patent Number 5,382,918.

产品特性

3.3V, 5V, 12V, and Adjustable Output Versions
Adjustable Version Output Voltage Range, 1.2V to 37V ±4% Max Over Line and Load Conditions
Available in TO-220 and TO-263 Packages
Ensured 3A Output Load Current
Input Voltage Range Up to 40V
Requires Only 4 External Components
Excellent Line and Load Regulation Specifications
150 kHz Fixed Frequency Internal Oscillator
TTL Shutdown Capability
Low Power Standby Mode, IQ Typically 80μA
High Efficiency
Uses Readily Available Standard Inductors
Thermal Shutdown and Current Limit Protection

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