Union Semiconductor International Limited UM1550DB-28
| 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 |
Request Quote / Inquiry
| 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) | 2.8V |
| 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-28 is a fixed 2.8V low dropout linear regulator delivering up to 300mA. Its standout feature is an ultra-low quiescent current of just 3.5 µA, making it perfect for battery-powered and energy-harvesting applications. The 4-DFN (1x1) package is exceptionally small, and dropout is only 0.3V at 200mA.
- Ultra-Low Quiescent Current: 3.5 µA extends battery life in standby and always-on applications.
- Minimal Footprint: 4-DFN (1x1) package is among the smallest available.
- Low Dropout: 0.3V at 200mA ensures efficient operation.
- Stable Output: PSRR of 56dB~42dB provides adequate noise filtering.
Ultra-Low-Power Wearables
The 3.5 µA quiescent current is ideal for always-on devices like smartwatches and fitness bands, maximizing battery life.
Energy Harvesting Systems
Perfect for solar or thermal energy harvesting applications where every microamp counts.
Standby Power Circuits
Maintains a stable 2.8V rail for RTCs, SRAM, and wake-up circuits in appliances and industrial equipment.
Hearing Aids and Implants
The tiny 4-DFN (1x1) package and low power consumption make it suitable for medical audio devices.
Remote Keyless Entry (RKE)
Provides reliable power for RF transmitters and receivers in car keys, with minimal battery drain.
Portable Gas Detectors
Ensures long operational life for sensors and alarms in safety-critical portable devices.
- Q: What is the output voltage of the UM1550DB-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 is 2.8V (typical); refer to the datasheet for the full operating range.
- Q: What is the dropout voltage?
- A: Dropout is typically 0.3V at a 200mA load.
- Q: What is the quiescent current?
- A: The quiescent current is extremely low at 3.5 µA.
- Q: What package is available?
- A: It comes in a 4-DFN (1x1) package.
UM1550DB-28.pdf
- Q: What is the output voltage of the UM1550DB-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 is 2.8V (typical); refer to the datasheet for the full operating range.
- Q: What is the dropout voltage?
- A: Dropout is typically 0.3V at a 200mA load.
- Q: What is the quiescent current?
- A: The quiescent current is extremely low at 3.5 µA.
- Q: What package is available?
- A: It comes in a 4-DFN (1x1) package.
