降压开关稳压器线路负载调节驱动3A负载150kHz固定频率内部振荡器CXDC6579输入电压40V内部频率补偿低功耗待机模式 | |||||||||||||||||||||||||||||||||||||||||||||||
目录产品概述 返回TOP The CXDC6579G series of regulators are integrated circuits that provide all active functions for a step-down (buck) switching regulator, capable of driving a 3A load with excellent line and load regulation. These devices are avail-able in fixed output voltages of 3.3V, 5V, 12V, and an adjust-able 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 CXDC6579G 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 5 pins lead in one line 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 CXDC6579G series. This feature greatly simplifies the design of switch-mode power supplies. Other features include a guaranteed ±2% tolerance on output voltage under specified input voltage and output load conditions, and ±10% 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 tem perature shutdown for complete protection under fault conditions.产品特点 返回TOP ※ 3.3V, 5V, 12V, and adjustable output versions (ADJ) ※ Adjustable version output voltage range, 1.25V to 37V±2% max over line and load conditions ※ Available in TO-220 and TO-263 packages ※ Guaranteed 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 80 μA ※ Uses readily available standard inductors ※ Thermal shutdown and current limit protection 应用范围 返回TOP ※ Simple high-efficiency step-down (buck) regulator , CAR DVD electronic ※ On-card switching regulators , LCD-TV , LCD-monitor , ADSL ※ Positive to negative converter 技术规格书(产品PDF) 返回TOP 需要详细的PDF规格书请扫一扫微信联系我们,还可以获得免费样品以及技术支持!
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