Overview
The LP2985-50DBVR is a fixed-output, wide-input, low-noise, low-dropout voltage regulator produced by Texas Instruments. This component supports an input voltage range from 2.5 V to 16 V and can deliver up to 150 mA of load current. It is designed to provide a stable output voltage with high accuracy and low noise, making it suitable for various applications including low-voltage microcontrollers (MCUs) and processors.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 5-pin SOT-23 (DBV) |
| Operating Temperature Range | -40°C to 125°C |
| Input Voltage Range | 2.5 V to 16 V |
| Output Voltage Range | 1.2 V to 5.0 V (fixed, 100-mV steps) |
| Output Current | Up to 150 mA |
| Output Accuracy | ±0.5% for new chip, ±1% for A-grade legacy chip, ±1.5% for standard-grade legacy chip |
| Quiescent Current (Iq) | 71 µA at I_LOAD = 0 mA, 750 µA at I_LOAD = 150 mA |
| Shutdown Current | 0.01 µA (typ) for legacy chip, 1.12 µA (typ) for new chip |
| Voltage Dropout (Max) | 0.58 V @ 150 mA |
| Noise | 30 µV RMS with 10-nF bypass capacitor |
| PSRR | 70 dB at 1 kHz, 40 dB at 1 MHz |
Key Features
- Low dropout voltage and high output accuracy across load and temperature.
- Low noise performance with 30 µV RMS noise using a 10-nF bypass capacitor.
- High PSRR (Power Supply Rejection Ratio) of 70 dB at 1 kHz and 40 dB at 1 MHz.
- Internal soft-start and current limit protection to reduce inrush current during startup.
- Overcurrent and overtemperature protection.
- Enable pin for device shutdown.
- Stable operation with 2.2-µF ceramic capacitors.
Applications
- Washer and dryer systems.
- Land mobile radio systems.
- Active antenna systems and mMIMO (Massive Multiple-Input Multiple-Output) systems.
- Cordless power tools.
- Motor drives and control boards.
- Low-voltage microcontrollers (MCUs) and processors.
Q & A
- What is the input voltage range of the LP2985-50DBVR?
The input voltage range is from 2.5 V to 16 V. - What is the maximum output current of the LP2985-50DBVR?
The maximum output current is up to 150 mA. - What is the output voltage accuracy of the LP2985-50DBVR?
The output voltage accuracy is ±0.5% for the new chip, ±1% for A-grade legacy chips, and ±1.5% for standard-grade legacy chips. - How does the LP2985-50DBVR reduce noise?
The LP2985-50DBVR reduces noise by using a 10-nF bypass capacitor, achieving 30 µV RMS noise. - What is the PSRR of the LP2985-50DBVR?
The PSRR is 70 dB at 1 kHz and 40 dB at 1 MHz. - Does the LP2985-50DBVR have overcurrent and overtemperature protection?
Yes, it includes internal overcurrent and overtemperature protection. - How does the LP2985-50DBVR manage inrush current during startup?
The internal soft-start and current limit protection reduce inrush current during startup. - What is the package type of the LP2985-50DBVR?
The package type is a 5-pin SOT-23 (DBV). - What are some common applications of the LP2985-50DBVR?
Common applications include washer and dryer systems, land mobile radio systems, active antenna systems, cordless power tools, and motor drives and control boards. - How do you enable or disable the LP2985-50DBVR?
The device can be enabled by driving the ON/OFF pin high and disabled by driving it low.
