Overview
The LP2985AIM5-2.5 is a fixed-output, low-noise, low-dropout voltage regulator produced by Texas Instruments. This device is part of the LP2985-N series, known for its high performance and cost-effectiveness in both portable and non-portable applications. It supports an input voltage range from 2.5 V to 16 V and can deliver up to 150 mA of continuous load current. The LP2985AIM5-2.5 is particularly suited for applications requiring low output noise and high power supply rejection ratio (PSRR), making it ideal for powering low-voltage microcontrollers (MCUs) and processors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.5 V to 16 V | V |
| Output Voltage Range (New Chip) | 1.2 V to 5.0 V (fixed, 100-mV steps) | V |
| Output Voltage Range (Legacy Chip) | 2.5 V to 6.1 V | V |
| Output Current | Up to 150 mA | mA |
| Output Voltage Accuracy (New Chip) | ±0.5% | % |
| Output Voltage Accuracy (Legacy Chip, Standard Grade) | ±1.5% | % |
| Output Voltage Accuracy (Legacy Chip, A Grade) | ±1.0% | % |
| Dropout Voltage (New Chip, IOUT = 0 mA) | 1 to 2.75 mV | mV |
| Quiescent Current (New Chip, ILOAD = 0 mA) | 71 μA | μA |
| Quiescent Current (New Chip, ILOAD = 150 mA) | 750 μA | μA |
| Shutdown Current (New Chip) | 1.12 μA (typ) | μA |
| Output Noise Voltage | 30 μVRMS (with 10-nF bypass capacitor) | μVRMS |
| PSRR at 1 kHz | 70 dB | dB |
| Operating Junction Temperature | –40°C to +125°C | °C |
| Package | 5-pin SOT-23 (DBV) |
Key Features
- Low noise: 30 μVRMS with a 10-nF bypass capacitor.
- High PSRR: 70 dB at 1 kHz and 40 dB at 1 MHz.
- Integrated overcurrent protection and thermal shutdown.
- Output enable pin for controlling the output voltage.
- Internal soft-start mechanism to reduce inrush current during startup.
- Output pulldown circuit to discharge output capacitance when the device is disabled.
- Stable operation with 2.2-µF ceramic capacitors.
- Low dropout voltage and high accuracy across load and temperature variations.
Applications
- Washers and dryers.
- Land mobile radios.
- Active antenna systems and mMIMO.
- Cordless power tools.
- Motor drives and control boards.
Q & A
- What is the input voltage range of the LP2985AIM5-2.5?
The input voltage range is from 2.5 V to 16 V.
- What is the maximum output current of the LP2985AIM5-2.5?
The maximum output current is up to 150 mA.
- What is the output voltage accuracy of the new chip?
The output voltage accuracy of the new chip is ±0.5%.
- What is the typical quiescent current at no load for the new chip?
The typical quiescent current at no load for the new chip is 71 μA.
- Does the LP2985AIM5-2.5 have overcurrent and thermal protection?
Yes, the device includes integrated overcurrent protection and thermal shutdown.
- What is the operating junction temperature range of the LP2985AIM5-2.5?
The operating junction temperature range is from –40°C to +125°C.
- What type of package is the LP2985AIM5-2.5 available in?
The device is available in a 5-pin SOT-23 (DBV) package.
- How does the output enable pin function?
The output enable pin is an active-high pin; the output voltage is enabled when the pin voltage is greater than the high-level input voltage and disabled when it is less than the low-level input voltage.
- What is the PSRR at 1 kHz for the LP2985AIM5-2.5?
The PSRR at 1 kHz is 70 dB.
- Does the LP2985AIM5-2.5 have an internal soft-start mechanism?
Yes, the device has an internal soft-start mechanism to reduce inrush current during startup.
