Union Semiconductor International Limited UM1540S-18
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $1.04 | $1.04 |
| 15+ | $0.24 | $3.60 |
| 25+ | $0.23 | $5.75 |
| 50+ | $0.22 | $11.00 |
| 100+ | $0.20 | $20.00 |
| N+ | $0.04 | 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) | 1.8V |
| 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 | SC-74A, SOT-753 |
| Supplier Device Package | SOT-23-5 |
| ROHS |  |
The UM1540S-18 is a low dropout linear regulator from Union Semiconductor, offering a fixed 1.8V output with up to 300mA. Its exceptional 1.5 µA quiescent current makes it one of the most power-efficient options for battery-powered designs. The SOT-23-5 package and 0.33V dropout at 200mA ensure versatility and performance.
- Ultra-Low Power: 1.5 µA quiescent current extends battery life in standby.
- Precise 1.8V Output: Fixed voltage for modern low-power ICs.
- Compact Footprint: SOT-23-5 package saves board space.
- Low Dropout: 0.33V at 200mA for efficient operation.
Low-Power Microcontrollers
The 1.8V output and 1.5 µA quiescent current are ideal for modern MCUs in always-on IoT devices, extending battery life significantly.
Memory Power Supplies
Provides a stable 1.8V rail for DDR memory and flash storage in portable electronics.
RF Transceivers
Clean 1.8V supply with PSRR of 56dB at 100Hz reduces noise interference in wireless communication modules.
Wearable Health Monitors
Compact SOT-23-5 package and low dropout support continuous heart-rate and activity monitoring.
FPGA Core Voltage
Regulates 1.8V core supply for small FPGAs in prototyping and embedded systems.
- Q: What is the output voltage of the UM1540S-18?
- A: The fixed output voltage is 1.8V.
- 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: 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 SOT-23-5 package.
UM1540S-18.pdf
- Q: What is the output voltage of the UM1540S-18?
- A: The fixed output voltage is 1.8V.
- 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: 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 SOT-23-5 package.
