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Manufacturer Part #


LDS3985 Series 3.3 V 300 mA Fixed Low Noise LDO BiCMOS Regulator - SOT-23-5

Product Specification Section
Technical Attributes
Attributes Table
Input Voltage-Min: 2.5V
Input Voltage-Max: 6V
Output Voltage Fixed: 3.3V
Dropout Voltage-Max: 250mV
Output Current-Max: 300mA
Operating Temp Range: -40°C to +125°C
Regulator Topology: Fixed
Quiescent Current: 300µA
No. of Outputs: Single
Output Noise: 30µV
Load Regulation (%): 0.01%
Current - Limit: 600mA
Line Regulation (%): 0.19%
Package Style:  SOT-23-5 (SOT-25)
Mounting Method: Surface Mount
Features & Applications

The LDS3985M33R is a low drop low noise BICMOS voltage regulator with an output voltage of 3.3 V and an output current of 300 mA. It is available in surface mount SOT-23-5L package.

This device is suitable for low power applications and in battery powered systems.


  • Input voltage from 2.5 V to 6 V
  • Stable with low ESR ceramic capacitors
  • Ultra low dropout voltage
  • Very low quiescent current
  • Guaranteed output current up to 300 mA
  • Wide range of output voltage:
    • from 1.25 V to 5.0 V
  • Fast turn-on time: typ. 240 μs
  • Logic-controlled electronic shutdown
  • Internal current and thermal limit
  • Output low noise voltage 30 μVRMS over 10 Hz to 100 kHz
  • SVR of 55 dB at 1 kHz, 50 dB at 10 kHz
  • Temperature range: -40 °C to 125 °C


  • Mobile Phone
  • Battery Powered Wireless Systems
  • Portable Information Appliances
Pricing Section
Minimum Order:
Multiple Of:
Factory Stock:Factory Stock:
Factory Lead Time:
20 Weeks
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