LD49150中文资料1.5 A ultra low dropout voltage regulator数据手册ST规格书

描述 Description

The LD49150 is a high-bandwidth, low-dropout, 1.5 A voltage regulator, ideal for powering core voltages of low power microprocessors. The LD49150 implements a dual supply configuration, which guarantees a very low output impedance and a very fast transient response. The LD49150 requires a bias input supply and a main input supply, allowing ultra-low input voltages on the main supply rail. The input supply operates from 1.4 V to 5.5 V and the bias supply requires between 3 V and 6 V to work properly. The LD49150 offers fixed output voltages from 0.8 V to 1.8 V and adjustable output voltages starting from 0.8 V. The LD49150 requires a minimum output capacitance for stability, and works optimally with small ceramic capacitors.

特性 Features

• Input voltage range:
• VI = 1.4 V to 5.5 V
• VBIAS = 3 V to 6 V
• Stable with ceramic capacitors
• ±1.5% initial tolerance
• Maximum dropout voltage (VI - VO) 200 mV over the operating temperature range
• Adjustable output voltage starting from 0.8 V
• Fast transient response (up to 10 MHz bandwidth)
• Excellent line and load regulation specifications
• Logic-controlled shutdown option
• Thermal shutdown and current limit protection
• Junction temperature range: - 25 °C to 125 °C

简介

LD49150属于集成电路（IC）的线性+开关稳压器。由制造生产的LD49150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。