Union Semiconductor International Limited UM1540DB-33
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $1.28 | $1.28 |
| 15+ | $0.29 | $4.35 |
| 25+ | $0.29 | $7.25 |
| 50+ | $0.27 | $13.50 |
| 100+ | $0.24 | $24.00 |
| N+ | $0.05 | Price Inquiry |
Request Quote / Inquiry
| Product attributes | Property Value |
| Manufacturer | Union Semiconductor International Limited |
| Product Series | UM1540 |
| Packaging | Tape & Reel (TR) | |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 6V |
| Voltage - Output (Min/Fixed) | 3.3V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 0.33V @ 200mA |
| Current - Output | 300mA |
| Current - Quiescent (Iq) | 1.5 µA |
| Current - Supply (Max) | - |
| PSRR | 56dB ~ 42dB (100Hz ~ 1kHz) |
| Control Features | Enable |
| 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 UM1540DB-33 is a low dropout linear regulator from Union Semiconductor, offering a fixed 3.3V output and 300mA current capability. Its ultra-low 1.5 µA quiescent current is a key feature for extending battery life in portable applications. The device achieves a low dropout voltage of 0.33V at 200mA, ensuring efficient operation. The ultra-compact 4-DFN (1x1) package is designed for space-constrained, high-density PCB layouts.
- Ultra-Small Package: The 4-DFN (1x1) footprint is ideal for miniaturized electronic designs where board space is critical.
- Low Power Consumption: 1.5 µA quiescent current dramatically reduces standby power, extending battery life in portable devices.
- Stable 3.3V Output: Provides a precise and stable voltage rail for digital and analog circuits, ensuring reliable performance.
- Low Dropout: 0.33V dropout at 200mA allows operation from low input voltages, improving power efficiency.
Compact Wearable Devices
The ultra-small 4-DFN (1x1) package and low 1.5 µA quiescent current make it perfect for smart earbuds and fitness trackers, providing a stable 3.3V rail for digital cores.
Battery-Powered Remote Controls
With 300mA output and low dropout, this LDO efficiently powers RF transceivers in remote controls, ensuring reliable 3.3V operation even as batteries discharge.
Portable Medical Monitors
The low noise and stable 3.3V output support sensitive biosignal processing in wearable ECG and temperature monitors, enhancing measurement accuracy.
Wireless Sensor Networks
Ultra-low quiescent current extends the lifespan of battery-powered nodes in industrial IoT networks, maintaining a consistent 3.3V supply for sensors and MCUs.
Consumer Electronics
Ideal for powering Bluetooth modules and audio codecs in portable speakers, the UM1540DB-33 ensures clean, regulated power in a minimal footprint.
Smart Home Devices
This regulator provides reliable 3.3V power for smart locks and sensors, with thermal protection ensuring safe operation in enclosed spaces.
- Q: What is the output voltage of the UM1540DB-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 explicitly specified in the datasheet; refer to the official datasheet for absolute maximum ratings.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.33V at a 200mA load.
- Q: What is the quiescent current?
- A: The quiescent current is a very low 1.5 µA, ideal for battery-powered devices.
- Q: What package is available?
- A: It comes in a compact 4-DFN (1x1) package.
UM1540DB-33.pdf
- Q: What is the output voltage of the UM1540DB-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 explicitly specified in the datasheet; refer to the official datasheet for absolute maximum ratings.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.33V at a 200mA load.
- Q: What is the quiescent current?
- A: The quiescent current is a very low 1.5 µA, ideal for battery-powered devices.
- Q: What package is available?
- A: It comes in a compact 4-DFN (1x1) package.
