MIC5317 3.3V Fixed 150mA LDO Voltage Regulator, SOT-23-5
High-performance 3.3V fixed LDO regulator with 150mA output, low dropout (155mV), and high PSRR in a compact SOT-23-5 package.
The MIC5317-3.3YM5-TR is a high performance, fixed output low dropout (LDO) voltage regulator providing a stable 3.3V output at up to 150mA. It is designed for demanding applications that require excellent power supply rejection (PSRR) and a compact footprint. The device operates from an input voltage range of 2.5V to 6.0V, making it ideal for USB port and 6V AC adapter powered systems.
This LDO offers 2% initial accuracy and a low dropout voltage of just 155mV at full load, ensuring efficient operation. It also features a low quiescent current of only 29µA, extending battery life in portable equipment. When disabled, the regulator draws virtually zero off-mode current, making it an excellent choice for power-sensitive designs.
The MIC5317 is stable with a small 1µF ceramic output capacitor, which saves board space and reduces component cost. It provides excellent load and line transient response, ensuring reliable performance under varying conditions. Built-in protection features include thermal shutdown and current limiting, safeguarding the device and the load. The regulator is available in a space-saving 5-lead SOT-23 package, with a tiny 1mm x 1mm footprint (height and width provided as 43mm x 33mm refers to packaging/reel, not the IC itself).
Key Specifications
- Output Type: Fixed
- Output Voltage: 3.3V (nominal)
- Max Output Current: 150mA
- Input Voltage Range: 2.5V to 6V
- Dropout Voltage (typ): 155mV @ 150mA
- Quiescent Current: 29µA
- PSRR: 70dB
- Accuracy: 2% initial
Package & Operating Range
- Mounting: Surface Mount
- Package: SOT-23-5 (5 pins)
- Operating Temperature: -40°C to +125°C
- USB port applications
- 6V AC adapter powered devices
- Portable and battery-operated equipment
- Space-constrained designs requiring a small footprint
- Output Type: Fixed
- Input Voltage Min: 2.5V
- Input Voltage Max: 6V
- No. of Outputs: 1
- Output Voltage Nom: 3.3V
- Polarity: Positive Output
- Max Output Current: 150mA
- Dropout Voltage Typ @ Current: 155mV
- IC Mounting: Surface Mount
- IC Case / Package: SOT-23
- No. of Pins: 5
- Operating Temperature Min: -40°C
- Operating Temperature Max: 125°C
- Quiescent Current: 29µA
- PSRR: 70dB
- Thermal-shutdown Protection: Yes
- Current-limit Protection: Yes
- Stable with 1µF ceramic output capacitors: Yes
- Product Range: 3.3V 150mA LDO Voltage Regulators
- Output Current Max: 150mA
- of Pins: 5Pins
- SVHC: No SVHC (04-Feb-2026)
Always follow local regulations and product guidance.
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