Union Semiconductor International Limited UM1540DA-18
| 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) | 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 | 6-WDFN Exposed Pad |
| Supplier Device Package | 6-DFN (2x2) |
| ROHS |  |
The UM1540DA-18 is a low dropout linear regulator from Union Semiconductor, providing a fixed 1.8V output with up to 300mA of current. It features an ultra-low quiescent current of 1.5 µA, making it perfect for battery-powered and energy-efficient designs. The dropout voltage is a low 0.33V at 200mA. The 6-DFN (2x2) package offers a compact solution for space-constrained applications requiring a stable 1.8V power supply.
- Efficient Power Conversion: Low dropout voltage of 0.33V at 200mA allows operation from low input voltages, reducing power waste.
- Ultra-Low Quiescent Current: 1.5 µA quiescent current extends battery life in standby and low-load conditions.
- Precise 1.8V Output: Delivers a stable and accurate voltage rail for modern low-voltage digital ICs.
- Compact and Reliable: The 6-DFN (2x2) package is suitable for portable devices, with thermal protection for safe operation.
Low-Power Microcontrollers
Modern MCUs often require 1.8V cores. This LDO provides a stable 1.8V rail from a higher input voltage, with 300mA capacity for the MCU and peripherals.
FPGA and DSP Power
Many FPGAs and DSPs need a 1.8V I/O or core supply. The UM1540DA-18 delivers clean, regulated power with low dropout, ensuring reliable operation.
Portable Electronics
Ideal for powering 1.8V logic in smartphones, tablets, and wearables, the ultra-low quiescent current helps conserve battery power.
Memory Modules
DDR and SRAM modules often require 1.8V. This regulator provides a stable supply for memory in embedded systems.
Sensor Interfaces
Many digital sensors operate at 1.8V. This LDO ensures a noise-free supply, improving sensor accuracy in IoT devices.
Battery Management Systems
Used in BMS for monitoring circuits that operate at 1.8V, this regulator offers low power consumption and high reliability.
- Q: What is the output voltage of the UM1540DA-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 explicitly specified in the datasheet; refer to the official datasheet for absolute maximum ratings.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.33V at a 200mA load.
- Q: What is the quiescent current?
- A: The quiescent current is a very low 1.5 µA, ideal for battery-powered devices.
- Q: What package is available?
- A: It comes in a 6-DFN (2x2) package.
UM1540DA-18.pdf
- Q: What is the output voltage of the UM1540DA-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 explicitly specified in the datasheet; refer to the official datasheet for absolute maximum ratings.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.33V at a 200mA load.
- Q: What is the quiescent current?
- A: The quiescent current is a very low 1.5 µA, ideal for battery-powered devices.
- Q: What package is available?
- A: It comes in a 6-DFN (2x2) package.
