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L4989MD - Low power voltage regulator

Download the L4989MD datasheet PDF. This datasheet also covers the L4989D variant, as both devices belong to the same low power voltage regulator family and are provided as variant models within a single manufacturer datasheet.

General Description

The L4989M and L4989MD are monolithic integrated 5 V voltage regulators with a low drop voltage at currents up to 150 mA.

The output voltage regulating element consists in a p-channel MOS and the regulation is performed regardless of input voltage transients up to 40 V.

Key Features

  • Operating DC supply voltage range 5.6 V to 31 V.
  • Very low quiescent current with watchdog disabled.
  • Precision output voltage (3%).
  • Low drop voltage (180 mV typ at Io = 150 mA).
  • Reset circuit sensing the output voltage down to 1 V.
  • Programmable reset delay with external capacitor.
  • Watchdog disable input.
  • Programmable watchdog timer with external capacitor.
  • Thermal shutdown and short circuit protection.
  • Wide temperature range (Tj = -40°C to 150°C).

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (L4989D-STMicroelectronics.pdf) that lists specifications for multiple related part numbers.

Full PDF Text Transcription for L4989MD (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for L4989MD. For precise diagrams, and layout, please refer to the original PDF.

L4989D L4989MD Low power voltage regulator Features ■ Operating DC supply voltage range 5.6 V to 31 V ■ Very low quiescent current with watchdog disabled ■ Precision outp...

View more extracted text
V ■ Very low quiescent current with watchdog disabled ■ Precision output voltage (3%) ■ Low drop voltage (180 mV typ at Io = 150 mA) ■ Reset circuit sensing the output voltage down to 1 V ■ Programmable reset delay with external capacitor ■ Watchdog disable input ■ Programmable watchdog timer with external capacitor ■ Thermal shutdown and short circuit protection ■ Wide temperature range (Tj = -40°C to 150°C) Datasheet  production data SO-8 SO-20 Description The L4989M and L4989MD are monolithic integrated 5 V voltage regulators with a low drop voltage at currents up to 150 mA.

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