Overview
The LP2985AIM5-4.0/NOPB 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 supply up to 150 mA of load current. It is available in both new and legacy chip versions, with the new chip offering improved specifications such as a wider output voltage range of 1.2 V to 5.0 V and enhanced accuracy.
The LP2985-N is designed to meet the needs of low-voltage microcontrollers (MCUs) and processors, featuring low output noise and high power supply rejection ratio (PSRR) performance. The device includes internal soft-start, current-limit protection, and overtemperature protection, making it suitable for a variety of applications.
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 Accuracy (New Chip) | ±0.5% | % |
| Output Accuracy Over Load and Temperature (New Chip) | ±1% | % |
| Quiescent Current (New Chip) at ILOAD = 0 mA | 71 µA | µA |
| Quiescent Current (New Chip) at ILOAD = 150 mA | 750 µA | µA |
| Shutdown Current (New Chip) | 1.12 µA (typ) | µA |
| Output Noise | 30 µV RMS with 10-nF bypass capacitor | µV RMS |
| 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
- Wide input voltage range: 2.5 V to 16 V
- Low dropout voltage and high PSRR performance
- Low output noise: 30 µV RMS with a 10-nF bypass capacitor
- High accuracy: ±0.5% for new chip, ±1% over load and temperature
- Low quiescent current: 71 µA at ILOAD = 0 mA and 750 µA at ILOAD = 150 mA for new chip
- Shutdown current as low as 1.12 µA (typ) for new chip
- Internal soft-start and current-limit protection
- Overcurrent and overtemperature protection
- Stable with 2.2-µF ceramic capacitors
- Compact 5-pin SOT-23 (DBV) package
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 LP2985AIM5-4.0/NOPB?
The input voltage range is from 2.5 V to 16 V.
- What are the output voltage ranges for the new and legacy chips?
The new chip supports an output range of 1.2 V to 5.0 V, while the legacy chip supports an output range of 2.5 V to 6.1 V.
- What is the maximum output current of the LP2985AIM5-4.0/NOPB?
The maximum output current is up to 150 mA.
- What is the quiescent current of the new chip at no load and full load?
The quiescent current is 71 µA at ILOAD = 0 mA and 750 µA at ILOAD = 150 mA for the new chip.
- What is the shutdown current for the new chip?
The shutdown current is typically 1.12 µA for the new chip.
- How much noise does the LP2985AIM5-4.0/NOPB produce at the output?
The output noise is 30 µV RMS with a 10-nF bypass capacitor.
- What is the PSRR performance of the LP2985AIM5-4.0/NOPB at 1 kHz and 1 MHz?
The PSRR is greater than 70 dB at 1 kHz and 40 dB at 1 MHz.
- What are the operating junction temperature limits for the LP2985AIM5-4.0/NOPB?
The operating junction temperature range is from –40°C to +125°C.
- What type of package is the LP2985AIM5-4.0/NOPB available in?
The component is available in a 5-pin SOT-23 (DBV) package.
- What are some common applications for the LP2985AIM5-4.0/NOPB?
Common applications include washers and dryers, land mobile radios, active antenna systems, cordless power tools, and motor drives and control boards.
