Union Semiconductor International Limited UM1550Y-33
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $1.16 | $1.16 |
| 15+ | $0.27 | $4.05 |
| 25+ | $0.26 | $6.50 |
| 50+ | $0.25 | $12.50 |
| 100+ | $0.22 | $22.00 |
| N+ | $0.04 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Union Semiconductor International Limited |
| Product Series | UM1550 |
| Packaging | Tape & Reel (TR) | |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 8V |
| Voltage - Output (Min/Fixed) | 3.3V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 0.3V @ 200mA |
| Current - Output | 300mA |
| Current - Quiescent (Iq) | 3.5 µA |
| Current - Supply (Max) | - |
| PSRR | 56dB ~ 42dB (100Hz ~ 1kHz) |
| Control Features | - |
| Protection Features | Over Current, Over Temperature |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | TO-243AA |
| Supplier Device Package | SOT-89-3 |
| ROHS |  |
The UM1550Y-33 is a fixed 3.3V low dropout regulator offering 300mA output. Its standout feature is an ultra-low quiescent current of 3.5 µA, making it perfect for battery-powered and energy-harvesting applications. With a dropout of just 0.3V at 200mA and PSRR up to 56dB, it delivers clean, efficient power in a compact SOT-89-3 package.
- Ultra-Low Quiescent Current: 3.5 µA extends battery life in standby modes.
- Low Dropout: 0.3V at 200mA enables operation from near-depleted batteries.
- Compact SOT-89-3: Small footprint for space-constrained designs.
- Good Ripple Rejection: 56dB at 100Hz ensures stable output.
Ultra-Low-Power IoT Sensors
The 3.5 µA quiescent current is ideal for always-on sensors in smart home and industrial IoT nodes, maximizing battery life.
Wearable Health Monitors
Compact SOT-89-3 package and low dropout of 0.3V at 200mA suit fitness bands and medical patches.
Energy Harvesting Systems
With minimal quiescent draw, it preserves harvested energy in solar or vibration-powered devices.
Portable Audio Equipment
Provides a clean 3.3V rail for audio codecs, with PSRR reducing hum from power lines.
Remote Keyless Entry
Low power consumption extends coin-cell life in automotive RKE fobs.
Smart Meters
Reliable 3.3V regulation for metering ICs, with low self-consumption for utility compliance.
- Q: What is the output voltage?
- A: Fixed 3.3V output.
- Q: What is the maximum output current?
- A: 300mA.
- Q: What is the input voltage range?
- A: Not specified in provided data.
- Q: What is the dropout voltage?
- A: 0.3V at 200mA.
- Q: What is the quiescent current?
- A: Ultra-low 3.5 µA.
- Q: What is the PSRR?
- A: 56dB at 100Hz to 42dB at 1kHz.
UM1550Y-33.pdf
- Q: What is the output voltage?
- A: Fixed 3.3V output.
- Q: What is the maximum output current?
- A: 300mA.
- Q: What is the input voltage range?
- A: Not specified in provided data.
- Q: What is the dropout voltage?
- A: 0.3V at 200mA.
- Q: What is the quiescent current?
- A: Ultra-low 3.5 µA.
- Q: What is the PSRR?
- A: 56dB at 100Hz to 42dB at 1kHz.
