描述 Description

The LD39030SJ is a low noise voltage regulator that provides 300 mA maximum current from an input voltage in the 1.5 V to 5.5 V range, with a typical dropout voltage of 200 mV. It is stabilized with a ceramic capacitor on the output. The ultra low drop voltage, low quiescent current, and low noise features make it suitable for low power battery-powered applications. Power supply rejection is typically 62 dB at low frequencies and starts to roll off at 10 kHz. An enable logic control function puts the LD39030SJ in shutdown mode allowing a total current consumption lower than 1 μA. The device also includes a short-circuit constant current limiting and thermal protection.

特性 Features

? Input voltage from 1.5 to 5.5 V
? Ultra low dropout voltage (200 mV typ. at 300 mA load)
? Very low quiescent current (20 μA typ. at no load, 40 μA typ. at 300 mA load, 1 μA max. in off mode)
? Very low noise (30 μVRMSfrom 1 kHz to 100 kHz at VOUT= 1.8 V)
? Output voltage tolerance: ± 2.0 % @ 25 °C
? 300 mA guaranteed output current
? Wide range of output voltages available on request: 0.8 V to 4.5 V with 100 mV step
? Logic-controlled electronic shutdown
? Compatible with ceramic capacitor COUT = 1 μF
? Internal current and thermal limit
? Flip-chip 4 bumps 0.8 x 0.8 mm pitch 0.4 mm
? Internal soft-start (typ. 100 μs)
? Temperature range: - 40 °C to 125 °C

簡介

LD39030SJ屬于集成電路（IC）的線性+開關穩(wěn)壓器。由制造生產(chǎn)的LD39030SJ穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個最小量，并且在工作時會將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對于大多數(shù)應用而言，雖然這種穩(wěn)壓器的效率低于開關模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應用。