Overview
The LP2985ITP-1.8 is a low-dropout (LDO) voltage regulator manufactured by National Semiconductor. Designed for applications requiring stable and efficient voltage regulation, this model provides a fixed output voltage of 1.8V with a maximum output current of 150mA. It is particularly suited for portable and battery-powered devices due to its low quiescent current and dropout voltage. The LP2985ITP-1.8 is housed in a compact SOT-23 package, making it ideal for space-constrained designs. Its market competitiveness lies in its reliability, low noise performance, and ease of integration into various electronic systems.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Output Voltage | 1.8 | V | Fixed |
| Output Current | 150 | mA | Maximum |
| Dropout Voltage | 340 | mV | At 150mA |
| Quiescent Current | 85 | µA | Typical |
| Input Voltage Range | 2.3 to 16 | V | |
| Operating Temperature Range | -40 to 125 | °C | |
| Package | SOT-23 | 5-pin | |
| Line Regulation | 0.02 | %/V | Typical |
| Load Regulation | 0.04 | %/mA | Typical |
| PSRR | 70 | dB | At 1kHz |
Key Features
- Low dropout voltage for efficient operation in battery-powered applications.
- Low quiescent current extends battery life.
- High power supply rejection ratio (PSRR) ensures stable output under varying input conditions.
- Built-in current limit and thermal shutdown protection for enhanced reliability.
- Compact SOT-23 package for space-constrained designs.
Applications
The LP2985ITP-1.8 is widely used in various electronic systems, including:
- Portable Devices: Smartphones, tablets, and wearable devices benefit from its low power consumption and compact size.
- Consumer Electronics: Used in audio equipment, cameras, and other devices requiring stable voltage regulation.
- Industrial Automation: Provides reliable power management in sensors, controllers, and communication modules.
- Automotive Electronics: Suitable for infotainment systems, navigation devices, and other automotive applications.
Q & A
1. What is the output voltage of the LP2985ITP-1.8?
The output voltage is fixed at 1.8V.
2. What is the maximum output current it can handle?
The maximum output current is 150mA.
3. What is the dropout voltage at 150mA?
The dropout voltage is 340mV at 150mA.
4. What is the typical quiescent current?
The typical quiescent current is 85µA.
5. What is the input voltage range?
The input voltage range is 2.3V to 16V.
6. What is the operating temperature range?
The operating temperature range is -40°C to 125°C.
7. What package does the LP2985ITP-1.8 come in?
It comes in a 5-pin SOT-23 package.
8. What is the PSRR of this LDO?
The power supply rejection ratio (PSRR) is 70dB at 1kHz.
9. Does it include protection features?
Yes, it includes current limit and thermal shutdown protection.
10. What are its typical applications?
Typical applications include portable devices, consumer electronics, industrial automation, and automotive electronics.
