LDL1117中文资料1.2 A高PSRR低压降线性稳压器数据手册ST规格书

描述 Description

The LDL1117 provides 1.2 A of maximum current with an input voltage range from 2.5 V to 18 V, and a typical dropout voltage of 350 mV @ 1.2 A.

The high power supply rejection ratio of 87 dB at 120 Hz, rolling down to more than 40 dB at 100 kHz, makes the LDL1117 suitable for direct regulations in SMPS and secondary linear regulations in DC-DC converters.

This device includes current limit, SOA and thermal protections.

特性 Features

• Input voltage from 2.5 V to 18 V
• Available on fixed output voltages: 1.2 V (1.185 V), 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V, 5.0 V (other options are available on request)
• Typical dropout 350 mV @ 1.2 A
• High PSRR 87 dB @ 120 Hz
• Package SOT223

简介

LDL1117属于集成电路（IC）的线性+开关稳压器。由制造生产的LDL1117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。