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LD39100：1 A low quiescent current low noise voltage regulator

The LD39100 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 drop voltage, low quiescent current and low-noise features make it suitable for low power battery-powered applications. Power supply rejection is 70 dB at low frequency and starts to roll off at 10 kHz. Enable logic control function puts the LD39100 in shutdown mode, allowing a total current consumption lower than 1 µA. The device also includes short-circuit constant current limiting and thermal protection. LD39100 is available also in AEC-Q100 qualified version, in the DFN6 (3x3 mm) with wettable flank package.

Key Features

• Industrial & Automotive grade (AEC-Q100)
• 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 µ VRMS at VOUT = 0.8 V)
• Output voltage tolerance: ± 2.0% @ 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
• Stable with ceramic capacitors COUT = 1 µF
• Internal current and thermal limit
• DFN6 (3x3 mm) package
• Temperature range: - 40 °C to 125 °C

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