Union Semiconductor International Limited UM1550Y-45
| 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) | 4.5V |
| 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-45 is a fixed 4.5V low dropout linear regulator from Union Semiconductor, providing up to 300mA of output current. Its ultra-low quiescent current of 3.5 µA makes it ideal for battery-powered and energy-efficient designs. The device features a dropout voltage of 0.3V at 200mA, ensuring good efficiency. Housed in a SOT-89-3 package, it offers a robust solution for industrial and portable applications requiring a stable 4.5V supply.
- Ultra-Low Quiescent Current: 3.5 µA extends battery life in standby modes.
- High Output Current: 300mA supports a wide range of loads.
- Low Dropout: 0.3V at 200mA improves efficiency with low input margins.
- Good Noise Rejection: 56dB PSRR at 100Hz stabilizes sensitive circuits.
Automotive Sensor Modules
The 4.5V output and 300mA capability power pressure and temperature sensors in vehicles, with low quiescent current for always-on modules.
Industrial Process Controllers
Stable 4.5V rail supports analog signal conditioning circuits in PLCs and process transmitters.
Battery-Powered Test Equipment
Ultra-low 3.5 µA quiescent current extends battery life in handheld calibrators and field meters.
LED Driver Bias Supplies
The 300mA output can bias LED driver ICs in portable lighting applications.
Telecom Line Cards
Reliable 4.5V output with 56dB PSRR at 100Hz ensures clean power for line interface circuits.
- Q: What is the output voltage of the UM1550Y-45?
- A: The fixed output voltage is 4.5V.
- Q: What is the maximum output current?
- A: It can deliver up to 300mA.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; please refer to the datasheet.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.3V at 200mA load.
- Q: What is the quiescent current?
- A: The quiescent current is very low at 3.5 µA.
- Q: What package is available?
- A: It comes in the SOT-89-3 package.
UM1550Y-45.pdf
- Q: What is the output voltage of the UM1550Y-45?
- A: The fixed output voltage is 4.5V.
- Q: What is the maximum output current?
- A: It can deliver up to 300mA.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; please refer to the datasheet.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.3V at 200mA load.
- Q: What is the quiescent current?
- A: The quiescent current is very low at 3.5 µA.
- Q: What package is available?
- A: It comes in the SOT-89-3 package.
