Union Semiconductor International Limited UM1540DA-28
| 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) | 2.8V |
| 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 | 6-WDFN Exposed Pad |
| Supplier Device Package | 6-DFN (2x2) |
| ROHS |  |
The UM1540DA-28 is a high-performance low dropout linear regulator from Union Semiconductor, delivering a fixed 2.8V output with up to 300mA of current. Its ultra-low 1.5 µA quiescent current makes it an excellent choice for battery-powered and energy-sensitive applications. The device offers a low dropout voltage of 0.33V at 200mA, ensuring efficient operation even with small input-to-output voltage margins. Housed in a compact 6-DFN (2x2) package, this LDO is designed for space-constrained portable electronics.
- Extended Battery Life: Ultra-low 1.5 µA quiescent current minimizes standby power consumption, ideal for portable devices.
- High Efficiency: Low dropout voltage of 0.33V @ 200mA allows operation with minimal power loss.
- Compact Form Factor: 6-DFN (2x2) package saves PCB space for miniaturized designs.
- Clean Output: PSRR of 56dB to 42dB (100Hz-1kHz) reduces input noise for sensitive loads.
Battery-Powered IoT Sensors
With an ultra-low quiescent current of 1.5 µA, the UM1540DA-28 is perfect for always-on IoT sensors where extending battery life is critical. The 2.8V output is suitable for powering low-voltage microcontrollers and sensors.
Wearable Devices
The compact 6-DFN (2x2) package and low dropout voltage of 0.33V @ 200mA make this regulator ideal for space-constrained wearables, ensuring efficient power conversion from a single-cell Li-ion battery.
Portable Medical Monitors
Stable 2.8V output with 300mA capability supports sensitive medical monitoring circuits. The low quiescent current ensures minimal power drain during standby, extending device operational time.
Energy Harvesting Systems
For systems powered by energy harvesters, the 1.5 µA quiescent current minimizes overhead, allowing more harvested energy to be used by the load. The low dropout helps maintain regulation even with low input voltages.
Wireless Communication Modules
The PSRR of 56dB to 42dB (100Hz to 1kHz) helps filter noise from switching regulators, providing a clean 2.8V supply for RF modules, improving signal integrity and reducing interference.
- Q: What is the output voltage of the UM1540DA-28?
- A: The UM1540DA-28 provides a fixed output voltage of 2.8V.
- Q: What is the maximum output current?
- A: This LDO can deliver up to 300mA of output current.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; please refer to the datasheet for this parameter.
- 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 very low at 1.5 µA, making it ideal for battery-powered applications.
- Q: What package is available?
- A: The UM1540DA-28 is available in a 6-DFN (2x2) package.
UM1540DA-28.pdf
- Q: What is the output voltage of the UM1540DA-28?
- A: The UM1540DA-28 provides a fixed output voltage of 2.8V.
- Q: What is the maximum output current?
- A: This LDO can deliver up to 300mA of output current.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; please refer to the datasheet for this parameter.
- 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 very low at 1.5 µA, making it ideal for battery-powered applications.
- Q: What package is available?
- A: The UM1540DA-28 is available in a 6-DFN (2x2) package.
