Union Semiconductor International Limited UM1450S-28
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $2.64 | $2.64 |
| 15+ | $0.61 | $9.15 |
| 25+ | $0.59 | $14.75 |
| 50+ | $0.56 | $28.00 |
| 100+ | $0.50 | $50.00 |
| N+ | $0.10 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Union Semiconductor International Limited |
| Product Series | UM1450 |
| Packaging | Tape & Reel (TR) | |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 16V |
| Voltage - Output (Min/Fixed) | 2.8V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 0.3V @ 150mA |
| Current - Output | 250mA |
| Current - Quiescent (Iq) | 5 µA |
| Current - Supply (Max) | - |
| PSRR | 40dB (100Hz) |
| Control Features | Enable |
| Protection Features | - |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | TO-236-3, SC-59, SOT-23-3 |
| Supplier Device Package | SOT-23-3 |
| ROHS |  |
The UM1450S-28 from Union Semiconductor is a high-efficiency 2.8V low dropout linear regulator designed for ultra-low-power applications. With a maximum output current of 250mA and an exceptionally low quiescent current of just 5 µA, it is perfect for battery-powered and energy-harvesting devices. The low 0.3V dropout voltage at 150mA ensures efficient operation even as the battery discharges. Housed in a compact SOT-23-3 package, this LDO offers a simple, reliable solution for maintaining stable voltage in space-constrained designs.
- Ultra-Low Power Consumption: A mere 5 µA quiescent current dramatically extends battery life in portable and standby applications.
- High Efficiency: Low 0.3V dropout voltage at 150mA maximizes usable battery capacity.
- Compact Design: The SOT-23-3 package is ideal for miniaturized PCBs and space-limited devices.
- Stable Output: 40dB PSRR at 100Hz ensures clean power for analog and audio circuits.
Battery-Powered Wearables
The ultra-low 5 µA quiescent current is perfect for fitness trackers and smartwatches, significantly extending standby time between charges.
Energy Harvesting Systems
For solar or vibration-powered sensors, the minimal overhead current ensures maximum power is delivered to the load, improving overall system efficiency.
Portable Audio Players
The 2.8V output with 40dB PSRR at 100Hz provides a stable, low-noise supply for audio DACs and amplifiers, reducing audible hum.
Remote Controls & Key Fobs
With 250mA capability and low dropout, it efficiently powers RF transmitters and microcontrollers in battery-operated remote devices.
Always-On Memory Circuits
The 5 µA quiescent current makes it ideal for keeping SRAM or RTC circuits powered in standby mode without draining the main battery.
Medical Monitoring Patches
Compact SOT-23-3 package and low power consumption suit disposable health patches that require long-term, reliable operation from small batteries.
- Q: What is the output voltage?
- A: The UM1450S-28 provides a fixed 2.8V output.
- Q: What is the maximum output current?
- A: It can supply up to 250mA of output current.
- Q: What is the input voltage range?
- A: The input voltage range is not explicitly provided; typically it should be above 2.8V plus dropout. Refer to the datasheet.
- Q: What is the dropout voltage?
- A: Dropout voltage is 0.3V at 150mA load.
- Q: What is the quiescent current?
- A: The quiescent current is extremely low at 5 µA.
- Q: What package is this available in?
- A: It is available in the SOT-23-3 package.
UM1450S-28.pdf
- Q: What is the output voltage?
- A: The UM1450S-28 provides a fixed 2.8V output.
- Q: What is the maximum output current?
- A: It can supply up to 250mA of output current.
- Q: What is the input voltage range?
- A: The input voltage range is not explicitly provided; typically it should be above 2.8V plus dropout. Refer to the datasheet.
- Q: What is the dropout voltage?
- A: Dropout voltage is 0.3V at 150mA load.
- Q: What is the quiescent current?
- A: The quiescent current is extremely low at 5 µA.
- Q: What package is this available in?
- A: It is available in the SOT-23-3 package.
