【ns系列芯片】lm2575s-12
| 品牌 |
ns国半 |
型号 |
lm2575s-12 |
| 批号 |
08+ |
封装 |
to-263-5 |
| 营销方式 |
现货 |
产品性质 |
热销 |
| 处理信号 |
模拟信号 |
工艺 |
半导体集成 |
| 导电类型 |
双极型 |
集成程度 |
小规模 |
| 规格尺寸 |
5（mm） |
工作温度 |
-40~125（℃） |
| 静态功耗 |
5（mw） |
| |
simple switcher 1a step-down voltage regulator
features
•3.3v, 5v, 12v, 15v, and adjustable output versions•adjustable version output voltage range,
1.23v to 37v (57v for hv version) ±4% max over
line and load conditions•guaranteed 1a output current•wide input voltage range, 40v up to 60v for hv version•requires only 4 external components•52 khz fixed frequency internal oscillator•ttl shutdown capability, low power standby mode•high efficiency•uses readily available standard inductors•thermal shutdown and current limit protection•p + product enhancement tested
description
the lm2575 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, 15v, 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 lm2575 series offers a high-efficiency replacement for popular three-terminal linear regulators. it substantially reduces the size of the heat sink, and in many cases no heat sink is required.
a standard series of inductors optimized for use with the lm2575 are available from several different manufacturers. this feature greatly simplifies the design of switch-mode power supplies.
other features include a guaranteed ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. external shutdown is included, featuring 50 μa (typical) standby current. the output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.