Overview
The LP2985-18DBVT is a low-dropout (LDO) voltage regulator manufactured by Texas Instruments. Designed for applications requiring stable and efficient power management, this regulator is part of TI's LP2985 series. It delivers a fixed output voltage of 1.8V with a maximum output current of 150mA. The LP2985-18DBVT is particularly suited for battery-powered devices and space-constrained applications due to its compact SOT-23 package and low quiescent current. Its market positioning targets portable electronics, IoT devices, and other low-power systems where reliability and efficiency are critical.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Output Voltage | 1.8 | V | Fixed |
| Output Current | 150 | mA | Maximum |
| Dropout Voltage | 300 | mV | At 150mA |
| Input Voltage Range | 2.5 to 16 | V | |
| Quiescent Current | 75 | µA | Typical |
| Package | SOT-23-5 | DBV | |
| Operating Temperature Range | -40 to +125 | °C | |
| Line Regulation | 0.02 | %/V | Typical |
| Load Regulation | 0.05 | %/mA | Typical |
| PSRR | 70 | dB | At 1kHz |
Key Features
- Low dropout voltage of 300mV at 150mA load.
- Fixed 1.8V output voltage for consistent performance.
- Ultra-low quiescent current of 75µA, ideal for battery-powered devices.
- High power supply rejection ratio (PSRR) of 70dB at 1kHz.
- Compact SOT-23-5 package for space-constrained applications.
- Wide input voltage range from 2.5V to 16V.
- Thermal shutdown and current limit protection for enhanced reliability.
Applications
The LP2985-18DBVT is widely used in applications requiring stable and efficient voltage regulation. Its key application areas include:
- Portable Electronics: Smartphones, tablets, and wearable devices benefit from its low quiescent current and compact size.
- IoT Devices: Sensors and communication modules rely on its stable output and low power consumption.
- Consumer Electronics: Cameras, audio devices, and other gadgets utilize its high PSRR for noise-free operation.
- Industrial Systems: Control systems and instrumentation benefit from its wide input voltage range and thermal protection.
Q & A
1. What is the output voltage of the LP2985-18DBVT?
The output voltage is fixed at 1.8V.
2. What is the maximum output current?
The maximum output current is 150mA.
3. What is the dropout voltage at 150mA?
The dropout voltage is 300mV at 150mA.
4. What is the input voltage range?
The input voltage range is 2.5V to 16V.
5. What is the quiescent current?
The typical quiescent current is 75µA.
6. What package does the LP2985-18DBVT use?
It comes in a SOT-23-5 package.
7. What is the operating temperature range?
The operating temperature range is -40°C to +125°C.
8. Does it have thermal protection?
Yes, it includes thermal shutdown protection.
9. What is the PSRR at 1kHz?
The PSRR is 70dB at 1kHz.
10. Is it suitable for battery-powered devices?
Yes, its low quiescent current and dropout voltage make it ideal for battery-powered applications.
