LM2598 - SIMPLE SWITCHER? 4.5V 至 40V、1A 降压开关稳压器

LM2598是TI德州仪器公司的一款转换器（集成开关）产品，LM2598是SIMPLE SWITCHER? 4.5V 至 40V、1A 降压开关稳压器，本站介绍了LM2598的封装应用图解、特点和优点、功能等，并给出了与LM2598相关的TI元器件型号供参考。

LM2598 - SIMPLE SWITCHER? 4.5V 至 40V、1A 降压开关稳压器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM2598 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A 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.

This series of switching regulators is similar to the LM2595 series, with additional supervisory and performance features added.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation†, improved line and load specifications, fixed-frequency oscillator, Shutdown /Soft-start, error flag delay and error flag output.

The LM2598 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 7-lead TO-220 package with several different lead bend options, and a 7-lead DDPAK surface mount package. Typically, for output voltages less than 12V, and ambient temperatures less than 50°C, no heat sink is required.

A standard series of inductors (both through hole and surface mount types) are available from several different manufacturers optimized for use with the LM2598 series. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a specified ±4% tolerance on output voltage under all conditions of input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 85μA standby current. Self protection features include a two stage 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
Ensured 1A Output Current
Available in 7-Pin TO-220 and DDPAK (Surface Mount) Package
Input Voltage Range Up to 40V
Excellent Line and Load Regulation Specifications
150 kHz Fixed Frequency Internal Oscillator
Shutdown /Soft-start
Out of Regulation Error Flag
Error Output Delay
Low Power Standby Mode, IQ Typically 85μA
High Efficiency
Uses Readily Available Standard Inductors
Thermal Shutdown and Current Limit Protection

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