Overview
The LP2985-33DBVT is a low-dropout (LDO) voltage regulator manufactured by Texas Instruments. It is designed to provide a stable 3.3V output voltage with low input-to-output voltage differential, making it ideal for powering sensitive electronic components. This regulator supports an input voltage range from 2.5 V to 16 V and can supply up to 150 mA of load current. The LP2985-33DBVT features high output accuracy, low quiescent current, and robust protection mechanisms such as short-circuit protection and thermal shutdown, ensuring reliable operation in various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VIN Range | 2.5 V to 16 V | V |
| VOUT Range (New Chip) | 1.2 V to 5.0 V (fixed, 100-mV steps) | V |
| VOUT Accuracy (New Chip) | ±0.5% | % |
| Output Current | Up to 150 mA | mA |
| Quiescent Current (ILOAD = 0 mA) | 71 μA | μA |
| Quiescent Current (ILOAD = 150 mA) | 750 μA | μA |
| Shutdown Current | 1.12 μA (typ) | μA |
| Output Noise Voltage | 30 μVRMS (with 10-nF bypass capacitor) | μVRMS |
| PSRR at 1 kHz | 70 dB | dB |
| PSRR at 1 MHz | 40 dB | dB |
| Operating Junction Temperature | -40°C to +125°C | °C |
| Package | 5-pin SOT-23 (DBV) |
Key Features
- Low Dropout Voltage: Provides a stable output voltage with minimal dropout under varying load conditions.
- High Output Accuracy: Ensures precise output voltage regulation for sensitive electronic components.
- Low Quiescent Current: Minimizes power consumption in standby or idle modes.
- Short-Circuit Protection: Offers protection against output short circuits to prevent damage to the regulator and connected devices.
- Thermal Shutdown: Includes thermal shutdown feature for overtemperature protection.
- Low Noise: Low output noise of 30 μVRMS with a 10-nF bypass capacitor.
- High PSRR: Wide bandwidth PSRR performance of greater than 70 dB at 1 kHz and 40 dB at 1 MHz.
Applications
- Embedded Systems: Suitable for powering microcontrollers, sensors, and other components in embedded systems.
- Wireless Devices: Ideal for providing stable power supply to wireless communication modules and transceivers.
- Consumer Electronics: Used in consumer electronic devices such as smartphones, tablets, and portable media players.
- Industrial Equipment: Applicable in washers and dryers, land mobile radios, active antenna systems, and motor drives and control boards.
- Battery-Powered Devices: Well-suited for battery-powered applications due to its low quiescent current and efficient power management.
Q & A
- Q: What is the input voltage range of the LP2985-33DBVT?
A: The input voltage range is from 2.5 V to 16 V. - Q: What is the output voltage of the LP2985-33DBVT?
A: The output voltage is fixed at 3.3 V. - Q: What is the maximum output current of the LP2985-33DBVT?
A: The maximum output current is up to 150 mA. - Q: What is the quiescent current of the LP2985-33DBVT when the load current is 0 mA?
A: The quiescent current is 71 μA when the load current is 0 mA. - Q: Does the LP2985-33DBVT have thermal shutdown protection?
A: Yes, it includes thermal shutdown feature for overtemperature protection. - Q: What is the typical output noise voltage of the LP2985-33DBVT?
A: The typical output noise voltage is 30 μVRMS with a 10-nF bypass capacitor. - Q: Is the LP2985-33DBVT suitable for battery-operated devices?
A: Yes, it is well-suited for battery-powered applications due to its low quiescent current and efficient power management. - Q: What is the package type of the LP2985-33DBVT?
A: The package type is 5-pin SOT-23 (DBV). - Q: What are the key applications of the LP2985-33DBVT?
A: It is used in embedded systems, wireless devices, consumer electronics, and industrial equipment. - Q: How does the LP2985-33DBVT protect against short circuits?
A: It offers short-circuit protection to prevent damage to the regulator and connected devices.
