Union Semiconductor International Limited UM1540DB-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 |
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| 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 | 4-XDFN Exposed Pad |
| Supplier Device Package | 4-DFN (1x1) |
| ROHS |  |
The UM1540DB-28 is an ultra-low quiescent current LDO regulator providing a fixed 2.8V output with 300mA capability. Its standout feature is the 1.5 µA quiescent current, making it exceptional for battery-powered and energy-harvesting applications. The 0.33V dropout at 200mA ensures efficient operation. Packaged in a tiny 4-DFN (1x1), it fits seamlessly into space-constrained designs.
- Ultra-Low Quiescent Current: 1.5 µA extends battery life in standby-heavy applications.
- High Output Current: 300mA capability in a 1x1mm package.
- Efficient Dropout: 0.33V at 200mA minimizes power loss.
- Minimal Footprint: 4-DFN package ideal for micro-sized PCBs.
Ultra-Low-Power IoT Devices
The 1.5 µA quiescent current is ideal for battery-powered sensors that spend most of their time in sleep mode.
Energy Harvesting Systems
Minimal current draw preserves harvested energy from solar or vibration sources, maximizing system uptime.
Portable Medical Monitors
Stable 2.8V output with low dropout supports continuous operation of wearable health trackers.
Smart Home Sensors
Compact 4-DFN package and low power consumption suit wireless door/window sensors and thermostats.
RTC Backup Power
The ultra-low quiescent current makes it perfect for maintaining real-time clocks in battery-backed applications.
- Q: What is the output voltage of the UM1540DB-28?
- A: The fixed output voltage is 2.8V.
- 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; refer to the datasheet.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.33V at 200mA load.
- Q: What is the quiescent current?
- A: The quiescent current is extremely low at 1.5 µA.
- Q: What package is available?
- A: It comes in a 4-DFN (1x1) package.
UM1540DB-28.pdf
- Q: What is the output voltage of the UM1540DB-28?
- A: The fixed output voltage is 2.8V.
- 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; refer to the datasheet.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.33V at 200mA load.
- Q: What is the quiescent current?
- A: The quiescent current is extremely low at 1.5 µA.
- Q: What package is available?
- A: It comes in a 4-DFN (1x1) package.
