LD49100数据手册集成电路（IC）的线性+开关稳压器规格书PDF

描述 Description

The LD49100 provides 1 A maximum current with an input voltage range from 1.5 V to 5.5 V and a typical dropout voltage of 200 mV. The device is stable with ceramic capacitors on the input and output.

The ultra low-dropout voltage, low quiescent current and low-noise features make it suitable for a wide range of automotive applications. Power supply rejection is 70 dB at low frequency and starts to roll off at 10 kHz. Enable logic control function puts the LD49100 in shutdown mode, allowing a total current consumption lower than 1 μA.

The device features a precise Power Good indicator, useful to monitor and sequence functions. Internal 1 ms soft-start circuit allows the reduction of inrush current.

The device includes the short-circuit constant current limiting and thermal protection. The LD49100 is available in AEC-Q100 grade 1 qualified version, in a small 6-pin DFN6 (3x3 mm) with wettable flank package.

特性 Features

• AEC-Q100 qualified
• Temperature range: -40 °C to 125 °C
• Input voltage from 1.5 to 5.5 V
• Ultra low-dropout voltage (200 mV typ. at 1 A load)
• Very low quiescent current (20 µA typ. at no load, 200 µA typ. at 1 A load, 1 µA max. in off mode)
• Very low-noise with no bypass capacitor (30 µVRMS at VOUT = 0.8 V)
• Output voltage tolerance: ± 2.0% at 25 °C
• 1 A guaranteed output current
• Wide range of output voltages available on request: 0.8 V to 4.5 V with 100 mV step and adjustable from 0.8 V
• Logic-controlled electronic shutdown
• Power Good function
• Stable with ceramic capacitors COUT = 1 µF
• Internal current and thermal limit
• DFN6 (3x3 mm) package with wettable flanks

简介

LD49100属于集成电路（IC）的线性+开关稳压器。由制造生产的LD49100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。