Union Semiconductor International Limited UM1770DA-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 |
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| Product attributes | Property Value |
| Manufacturer | Union Semiconductor International Limited |
| Product Series | UM1770 |
| 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) | 0.32V @ 500mA |
| Current - Output | 500mA |
| Current - Quiescent (Iq) | 140 µA |
| Current - Supply (Max) | 300 µA |
| PSRR | 65dB ~ 45dB (100Hz ~ 10kHz) |
| Control Features | Enable |
| Protection Features | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) |
| 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 UM1770DA-28 is a fixed 2.8V low dropout regulator from Union Semiconductor, capable of delivering 500mA. With a dropout of only 0.32V at full load, it maintains efficiency in battery-operated systems. The 140µA quiescent current balances performance and power savings. Its 6-DFN (2x2mm) package is ideal for compact designs, while 65dB PSRR at 100Hz provides excellent noise rejection.
- High Output Current: 500mA capability supports a wide range of peripherals and processors.
- Superior Noise Rejection: 65dB PSRR at 100Hz ensures clean power for sensitive RF and analog circuits.
- Low Dropout: 0.32V dropout at 500mA maximizes efficiency in low-headroom applications.
- Compact Footprint: 6-DFN (2x2mm) package saves board space.
High-Performance Portable Electronics
The 500mA output supports power-hungry application processors and displays, while the 65dB PSRR at 100Hz ensures clean supply for RF and analog sections.
Wireless Communication Modules
Excellent PSRR (65dB at 100Hz) reduces noise coupling from switching regulators, improving signal integrity in Wi-Fi and Bluetooth modules.
Digital Cameras and Imaging
Provides stable 2.8V rail for image sensors and DSPs, minimizing noise-induced artifacts in captured images.
GPS Receivers
The low dropout and high PSRR maintain accurate positioning by filtering power supply noise that could affect sensitive RF front-ends.
Medical Monitoring Devices
Reliable 500mA output with low noise supports continuous vital-sign monitoring equipment requiring stable power.
Automotive Infotainment
Regulates power for touchscreen controllers and audio codecs, ensuring consistent performance despite battery voltage fluctuations.
- Q: What is the output voltage of the UM1770DA-28?
- A: The fixed output voltage is 2.8V.
- Q: What is the maximum output current?
- A: It can deliver up to 500mA.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; refer to the datasheet for absolute maximum ratings.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.32V at a 500mA load.
- Q: What is the quiescent current?
- A: The quiescent current is 140µA.
- Q: What package is available?
- A: It comes in a 6-DFN (2x2mm) package.
UM1770DA-28.pdf
- Q: What is the output voltage of the UM1770DA-28?
- A: The fixed output voltage is 2.8V.
- Q: What is the maximum output current?
- A: It can deliver up to 500mA.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; refer to the datasheet for absolute maximum ratings.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.32V at a 500mA load.
- Q: What is the quiescent current?
- A: The quiescent current is 140µA.
- Q: What package is available?
- A: It comes in a 6-DFN (2x2mm) package.
