RT9193-33GB 3.3V 300mA Ultra-Low Noise LDO Regulator SOT23-5
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Prices updated: 14 Oct 2026
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About this product
The RT9193-33GB is a fixed 3.3 V low-dropout (LDO) linear regulator rated for up to 300 mA, in a 5-pin SOT23 package. It accepts inputs from 2.5 V to 5.5 V and suits low-noise supply rails for microcontrollers and sensors.
Specifications
- Input voltage
- 2.5 V to 5.5 V
- Output voltage
- 3.3 V (fixed)
- Maximum output current
- 300 mA
- Dropout voltage
- 220 mV typical at 300 mA
- Quiescent current
- 90 µA typical
- PSRR
- 50 dB
- Package
- SOT23-5
Frequently asked questions
What input voltage do I need for a stable 3.3 V output?
With a typical dropout of 220 mV at 300 mA, the input should be at least about 3.52 V at full load. The allowed input range is 2.5 V to 5.5 V.
Does it need external capacitors?
Refer to the RT9193 datasheet for the recommended input and output capacitors and their placement, as these affect stability and noise performance.
