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200 mA low quiescent current and high PSRR voltage regulator


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Overview of LDK320ADU33R

The LDK320 is a low drop voltage regulator, which provides a maximum output current of 200 mA from an input voltage in the range of 2.5 V to 18 V, with a typical dropout voltage of 100 mV.It is stabilized with a ceramic capacitor on the output.The very good dynamic characteristic, combined with low drop voltage and low quiescent current make it suitable for low power battery-powered applications.The enable logic control function allows the LDK320 to be in shutdown mode by consuming a total current lower than 1 μA.This device also includes a short-circuit current limiting, thermal and SOA protections.

Key Features

  • Input voltage from 2.5 to 18 V
  • Very low-dropout voltage (100 mV typ. @ 100 mA load)
  • Low quiescent current (typ. 60 μA, 1 μA in off mode)
  • High PSRR: 88 dB @ 120 Hz
  • Low noise
  • Output voltage tolerance: ± 0.5% @ 25 °C (LDK320A) or ± 2% 25 °C
  • Output current up to 200 mA
  • Wide range of output voltages available on request: fixed from 1.2 V to 12 V with 100 mV step and adjustable
  • Logic-controlled electronic shutdown
  • Compatible with ceramic capacitor COUT = 1 μF
  • Current, SOA and thermal protections
  • Available in SOT23-5L and SOT-89 packages
  • Temperature range: -40 °C to 125 °C


The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Source Content uid LDK320ADU33R Part Life Cycle Code Active
Ihs Manufacturer STMICROELECTRONICS Package Description ,
Reach Compliance Code compliant ECCN Code EAR99
HTS Code 8542.39.00.01 Factory Lead Time 54 Weeks
Samacsys Manufacturer STMicroelectronics Moisture Sensitivity Level 1
Packing Method TR

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