MIC5255-3.3YM5
| Parameters | |
|---|---|
| Voltage - Output (Min/Fixed) | 3.3V |
| Voltage - Output (Max) | - |
| Number of Regulators | 1 |
| Protection Features | Over Current, Over Temperature, Under Voltage Lockout (UVLO) |
| PSRR | 60dB ~ 50dB (10Hz ~ 10kHz) |
| Voltage Dropout (Max) | 0.25V @ 150mA |
| Package | Bulk |
| Product Status | Active |
| Standard Package | 1 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
| Series | - |
| Package / Case | SC-74A, SOT-753 |
| Mfr | Micrel Inc. |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C |
| Voltage - Input (Max) | 6V |
| Output Type | Fixed |
| Current - Output | 150mA |
| Supplier Device Package | SOT-23-5 |
| Output Configuration | Positive |
| Current - Quiescent (Iq) | 150 µA |
| Control Features | Enable |
MIC5255‑3.3YM5 Linear Voltage Regulator IC Positive Fixed 1 Output 150mA
The MIC5255‑3.3YM5 is a high‑precision, ultra‑low‑noise CMOS LDO linear regulator originally from Micrel (Microchip), delivering fixed 3.3V output up to 150mA load current in compact SOT‑23‑5 surface‑mount package. Optimized for battery‑powered and RF‑sensitive hardware, it accepts 2.7V‑6V input voltage, features a noise‑reduction bypass pin and logic‑controlled enable function, supports low‑ESR ceramic capacitors, and integrates thermal shutdown plus current‑limit protection to deliver clean, stable power for noise‑sensitive analog‑digital embedded circuits with minimal PCB footprint.
Key features
● Fixed 3.3V regulated output with 1% initial accuracy and 2% accuracy over full temperature range
● Maximum 150mA output load capacity
● Typical 135mV dropout voltage at full load; ultra‑low 30µV(rms) output noise with dedicated noise bypass pin
● Typical 90µA quiescent operating current and near‑zero shutdown current
● TTL‑compatible enable pin for power gating
● Stable performance with low‑ESR ceramic output capacitors
● Built‑in over‑current and thermal shutdown protection
● Industrial temperature range from ‑40°C to +125°C
FAQ
Q: What capacitor type works best for MIC5255‑3.3YM5?
A: Low‑ESR X7R/X5R ceramic capacitors are recommended to avoid oscillation.
Q: What is typical dropout voltage under full load?
A: Typical dropout reaches 135mV at 150mA output current.
Alternative LDO regulator parts
1. MIC5205‑3.3YM5: Pin‑compatible Microchip LDO with 150mA output, low noise and identical 3.3V fixed output for direct drop‑in production replacement.
2. LP2985‑33DBVR: TI low‑noise SOT‑23‑5 LDO delivering 3.3V /150mA output, featuring thermal protection for cross‑brand embedded redesign.
3. TPS79333DBVR: Texas Instruments ultra‑low‑noise LDO with 3.3V output, enable control and good PSRR performance for RF‑sensitive power supply circuits.
4. MCP1700‑3302E/TT: Microchip CMOS LDO offering 3.3V fixed output, low quiescent consumption and compact packaging to improve supply‑chain redundancy.
