Union Semiconductor International Limited UM1550DB-33
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $1.12 | $1.12 |
| 15+ | $0.26 | $3.90 |
| 25+ | $0.25 | $6.25 |
| 50+ | $0.24 | $12.00 |
| 100+ | $0.21 | $21.00 |
| 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 | 4-XDFN Exposed Pad |
| Supplier Device Package | 4-DFN (1x1) |
| ROHS |  |
The UM1550DB-33 is a high-performance 300mA LDO linear regulator from Union Semiconductor, delivering a fixed 3.3V output. Its ultra-low 3.5 µA quiescent current and compact 4-DFN package make it an excellent choice for battery-powered and space-constrained applications. With a dropout voltage of just 0.3V at 200mA, it maintains regulation even with low input margins.
- Extended Battery Life: Ultra-low 3.5 µA quiescent current minimizes standby power draw.
- Space-Saving Design: 4-DFN (1x1) package fits into compact PCBs for wearables and IoT.
- High Efficiency at Low Dropout: 0.3V dropout at 200mA allows operation close to the output voltage.
- Clean Output Power: 56dB PSRR at 100Hz reduces ripple from upstream converters.
Battery-Powered IoT Sensors
The ultra-low 3.5 µA quiescent current extends battery life in always-on sensor nodes, making it ideal for wireless environmental monitoring.
Wearable Health Monitors
Its tiny 4-DFN (1x1) package and 300mA output support powering microcontrollers and Bluetooth LE modules in compact fitness bands.
Portable Audio Devices
With PSRR of 56dB at 100Hz, it effectively filters low-frequency noise from switching regulators, ensuring clean power for audio codecs.
Smart Home Controllers
Provides stable 3.3V rail for Zigbee/Thread radios, with low dropout ensuring operation even as battery voltage declines.
Energy Harvesting Systems
The low quiescent current and 0.3V dropout make it suitable for powering circuits directly from small solar cells or TEGs.
- Q: What is the output voltage of the UM1550DB-33?
- A: The fixed output voltage is 3.3V.
- 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 a compact 4-DFN (1x1) package.
UM1550DB-33.pdf
- Q: What is the output voltage of the UM1550DB-33?
- A: The fixed output voltage is 3.3V.
- 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 a compact 4-DFN (1x1) package.
