Overview
The LP2985A-50DBVR is a fixed-output, wide-input, low-noise, low-dropout voltage regulator manufactured by Texas Instruments. This regulator 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 high accuracy and stability, making it suitable for a variety of applications, including low-voltage microcontrollers (MCUs) and processors.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range (VIN) | 2.5 V to 16 V |
| Output Voltage Range (VOUT) | 1.2 V to 5.0 V (fixed, 100-mV steps) |
| Output Current | Up to 150 mA |
| Output Accuracy | ±1% for A-grade legacy chip, ±1.5% for standard-grade legacy chip, ±0.5% for new chip |
| Quiescent Current (IQ) | 71 µA at ILOAD = 0 mA, 750 µA at ILOAD = 150 mA |
| Shutdown Current | 0.01 µA (typ) for legacy chip, 1.12 µA (typ) for new chip |
| Output Noise | 30 µV RMS with 10-nF bypass capacitor |
| PSRR | 70 dB at 1 kHz, 40 dB at 1 MHz |
| Operating Junction Temperature | –40°C to +125°C |
| Package | 5-pin SOT-23 (DBV) |
Key Features
- Low dropout voltage: Typical dropout of 280 mV at 150-mA load current and 7 mV at 1-mA load.
- Low quiescent current: 71 µA at ILOAD = 0 mA and 750 µA at ILOAD = 150 mA.
- Shutdown feature with low shutdown current.
- Low output noise of 30 µV RMS with a 10-nF bypass capacitor.
- High PSRR: 70 dB at 1 kHz and 40 dB at 1 MHz.
- Output current limiting and thermal protection.
- Stable with 2.2-µF ceramic capacitors.
- Internal soft-start time and current limit protection to reduce inrush current during startup.
Applications
The LP2985A-50DBVR is suitable for a variety of applications, including:
- Low-voltage microcontrollers (MCUs) and processors.
- Portable and non-portable electronic devices.
- Systems requiring low noise and high PSRR performance.
- Applications needing high accuracy and stability in output voltage.
Q & A
- What is the input voltage range of the LP2985A-50DBVR?
The input voltage range is from 2.5 V to 16 V.
- What is the maximum output current of the LP2985A-50DBVR?
The maximum output current is up to 150 mA.
- What is the output voltage accuracy of the LP2985A-50DBVR?
The output voltage accuracy is ±1% for A-grade legacy chip, ±1.5% for standard-grade legacy chip, and ±0.5% for the new chip.
- What is the quiescent current of the LP2985A-50DBVR?
The quiescent current is 71 µA at ILOAD = 0 mA and 750 µA at ILOAD = 150 mA.
- Does the LP2985A-50DBVR have a shutdown feature?
- What is the output noise of the LP2985A-50DBVR?
The output noise is 30 µV RMS with a 10-nF bypass capacitor.
- What is the PSRR of the LP2985A-50DBVR?
The PSRR is 70 dB at 1 kHz and 40 dB at 1 MHz.
- What is the operating junction temperature range of the LP2985A-50DBVR?
The operating junction temperature range is –40°C to +125°C.
- In what package is the LP2985A-50DBVR available?
The LP2985A-50DBVR is available in a 5-pin SOT-23 (DBV) package.
- Does the LP2985A-50DBVR have overcurrent and overtemperature protection?
