描述 Description

The LM2594 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 1A 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 LM2594 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 8-lead PDIP package and 8-lead SOIC surface mount package. A standard series of inductors are available from several different manufacturers optimized for use with the LM2594 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 LM2596 for 3.0A and LM2595 for 1.0A.

特性 Features

? Adjustable output voltage range, 1.2V to 37V +/-4% max over line and load
? Flexible to configure for different output voltages and applications
? Available in TO-220 and D2PAK packages
? Different mounting options
? Guaranteed 0.5A output load current
? High power density 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(yīng)用 Application

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

簡(jiǎn)介

LM2594屬于開(kāi)發(fā)板套件編程器的評(píng)估板-DC/DC與AC/DC（離線(xiàn)）SMPS。由制造生產(chǎn)的LM2594評(píng)估板 - DC/DC 與 AC/DC（離線(xiàn)）SMPS該系列產(chǎn)品提供了一種方便的方法，可對(duì)開(kāi)關(guān)模式電源轉(zhuǎn)換所用的器件（包括 DC-DC 和 AC-DC 型）進(jìn)行性能或特性評(píng)估?！胺€(wěn)壓器”（包含內(nèi)部電源開(kāi)關(guān)裝置）和“控制器”（設(shè)計(jì)為控制外部電源開(kāi)關(guān)）之類(lèi)的器件均包括在內(nèi)。