RT9167A-3.3V Low-Noise Fixed 3.3V LDO Regulator, SOT-323-5
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Prices updated: 14 Oct 2026
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About this product
A fixed 3.3 V low-dropout linear regulator from the RT9167/A family, rated 300 mA or 500 mA depending on the variant. It uses a P-MOSFET pass device and a reference bypass pin for low noise, and stays stable with a small 1 µF ceramic output capacitor. Suited to battery-powered portable designs.
Specifications
- Output voltage
- 3.3 V (fixed)
- Output current
- 300 mA / 500 mA (by variant)
- Accuracy
- 2%
- Package
- SOT-323-5
- Output capacitor
- 1 µF ceramic, low ESR
- Protection
- Current limit, over-temperature
- Shutdown current
- Nearly zero
Frequently asked questions
What output capacitor does it need?
It is designed for very low ESR capacitors and remains stable with a 1 µF ceramic capacitor on the output. A reference bypass pin is provided to improve noise performance; check the datasheet for its recommended value.
Is it suitable for battery-powered devices?
Yes. Its shutdown mode draws nearly zero operating current, which suits battery-powered devices. The input voltage must stay above the 3.3 V output plus the dropout voltage given in the datasheet.
