LD59100中文资料具有反向电流保护的1A超低压降稳压器数据手册ST规格书

描述 Description

The LD59100 is a 1 A LDO regulator designed for use in various environments. Its N-MOS topology allows reduction of the Rdson of the pass-element, maintaining a very low-dropout voltage even with very low input power supply voltage.

The device features very high PSRR characteristics over a wide frequency band, rendering it suitable for use as a secondary regulator for noise-sensitive applications.

The enable function can be used to further decrease the overall current consumption in shutdown mode.

The LD59100 embeds protection features, such as current limit, thermal shutdown and reverse output current protection.

特性 Features

• Input voltage range: 2.2 V to 5.5 V
• Ultra low-dropout: 200 mV typ. at 1 A
• NMOS topology
• Very high PSRR: 78 dB @ 100 Hz, 70 dB @ 100 kHz
• Very fast response to load variation
• Stable with 1 μF capacitor
• Thermal shutdown
• Current limit
• Adjustable from 1.2 V
• High output voltage accuracy: 1 % typ. (3 % max.)

简介

LD59100属于集成电路（IC）的线性+开关稳压器。由制造生产的LD59100稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。