Overview
The LP2985A-10DBVR is a fixed-output, wide-input, low-noise, low-dropout voltage regulator produced 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 particularly suited for applications requiring low-voltage microcontrollers (MCUs) and processors, offering high accuracy and stability across various operating conditions.
Key Specifications
| Specification | 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 | ±1% for new chip, ±1.5% for standard-grade legacy chip, ±0.5% for new chip only |
| 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 |
| Noise | 30 µV RMS with 10-nF bypass capacitor |
| PSRR | 70 dB at 1 kHz, 40 dB at 1 MHz |
| Protection Features | Output current limiting, thermal protection, overcurrent, and overtemperature protection |
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 no load and 750 µA at full load.
- Shutdown feature: Reduces current consumption to minimal levels when not in use.
- Low noise: 30 µV RMS with a 10-nF bypass capacitor.
- High PSRR: Greater than 70 dB at 1 kHz and 40 dB at 1 MHz.
- Stable with 2.2-µF ceramic capacitors.
- Internal soft-start time and current limit protection to reduce inrush current during startup.
- Overcurrent and overtemperature protection.
Applications
The LP2985A-10DBVR 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.
- Applications needing stable output voltage with minimal dropout.
Q & A
- What is the input voltage range of the LP2985A-10DBVR?
The input voltage range is from 2.5 V to 16 V. - What is the maximum output current of the LP2985A-10DBVR?
The maximum output current is up to 150 mA. - What is the output voltage accuracy of the new chip?
The output voltage accuracy is ±1% for the new chip. - What is the quiescent current (IQ) at no load and full load?
The quiescent current is 71 µA at no load and 750 µA at full load. - Does the LP2985A-10DBVR have a shutdown feature?
Yes, it has a shutdown feature that reduces current consumption to minimal levels when not in use. - What is the noise level of the LP2985A-10DBVR with a 10-nF bypass capacitor?
The noise level is 30 µV RMS with a 10-nF bypass capacitor. - What are the protection features of the LP2985A-10DBVR?
The protection features include output current limiting, thermal protection, overcurrent, and overtemperature protection. - What is the operating temperature range of the LP2985A-10DBVR?
The operating temperature range is -40°C to 125°C. - What package type is the LP2985A-10DBVR available in?
The LP2985A-10DBVR is available in a 5-pin SOT-23 (DBV) package. - Is the LP2985A-10DBVR stable with ceramic capacitors?
Yes, it is stable with 2.2-µF ceramic capacitors.
