LD49100 Low Quiescent Voltage Regulator

LD49100 Low Quiescent Voltage Regulator

STMicroelectronics’ voltage regulators are stable with ceramic capacitors on the input and output

STMicroelectronics’ 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 at 1 A output current. 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.

  • AEC-Q100 qualified
  • Temperature range: -40°C to +125°C
  • Input voltage from 1.5 V 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)
  • Very low-noise with no bypass capacitor (30 µVRMS at VOUT = 0.8 V)
  • Output voltage tolerance: ±2.0%
  • DFN6 (3 mm x 3 mm) package with wettable flanks

more information: https://www.st.com/en/power-management/ld49100.html

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Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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