描述 Description

The LM2596 series of Buck Switching 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. Requiring a minimum number of external components, these Buck Switching 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 D2PAK 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 guaranteed +/-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 80 μA 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. See LM2595 for 1.0A and LM2594 for 0.5A.

特性 Features

? Adjustable output voltage range, 1.2V to 37V +/-4% max over line and load conditions
? Flexible to configure for different output voltages and applications
? Available in TO-220 and D2PAK packages
? Different mounting options
? Guaranteed 3A output load current
? High power designs
? Input voltage range up to 40V
? Can be used with several input voltage supplies (+12V, +24V, +36V)
? Excellent line and load regulation specifications
? Provides a stable power supply
? 150 kHz fixed frequency internal oscillator
? No external component required to set frequency
? TTL shutdown capability
? Easy to implement low power modes
? Low power standby mode, Iq typically 80 µA
? Power saving mode
? Uses readily available standard inductors
? Quick and easy implementation
? Thermal shutdown and current limit
? Additional protection against faults

應用 Application

? Simple high-efficiency step-down (buck) regulator
? On-card switching regulators
? Positive to negative converter
? LCD-TV SMPS

簡介

LM2596屬于開發(fā)板套件編程器的評估板-DC/DC與AC/DC（離線）SMPS。由制造生產的LM2596評估板 - DC/DC 與 AC/DC（離線）SMPS該系列產品提供了一種方便的方法，可對開關模式電源轉換所用的器件（包括 DC-DC 和 AC-DC 型）進行性能或特性評估?！胺€(wěn)壓器”（包含內部電源開關裝置）和“控制器”（設計為控制外部電源開關）之類的器件均包括在內。