Overview
The LP2985IM5-3.3, produced by Texas Instruments, is a fixed-output, low-noise, low-power, ultra-low-dropout voltage regulator. This device is designed to offer exceptional performance for 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 LP2985IM5-3.3 features high output accuracy, low noise, and high power supply rejection ratio (PSRR), making it suitable for powering low-voltage microcontrollers (MCUs) and processors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VIN Range | 2.5 to 16 | V |
| VOUT Range (New Chip) | 1.2 to 5.0 | V (fixed, 100-mV steps) |
| VOUT Range (Legacy Chip) | 2.5 to 6.1 | V |
| VOUT Accuracy (New Chip) | ±0.5% | % |
| Output Current | Up to 150 | mA |
| Quiescent Current (Iq) at ILOAD = 0 mA | 71 | μA |
| Quiescent Current (Iq) at ILOAD = 150 mA | 750 | μA |
| Shutdown Current | 1.12 | μA (typ) |
| Output Noise Voltage | 30 | μVRMS (with 10-nF bypass capacitor) |
| PSRR at 1 kHz | 70 | dB |
| PSRR at 1 MHz | 40 | dB |
| Operating Junction Temperature | -40 to +125 | °C |
| Package | 5-pin SOT-23 (DBV) |
Key Features
- High output accuracy across load and temperature (±0.5% for new chip)
- Low noise output (30 μVRMS with 10-nF bypass capacitor)
- High PSRR (70 dB at 1 kHz, 40 dB at 1 MHz)
- Integrated overcurrent protection and thermal shutdown
- Internal soft-start mechanism for controlled inrush current
- Output enable feature with active-high ON/OFF pin
- Output pulldown circuit for new chip
- Stable operation with 2.2-µF ceramic capacitors
Applications
- Washers and dryers
- Land mobile radios
- Active antenna systems (mMIMO)
- Cordless power tools
- Motor drives and control boards
Q & A
- What is the input voltage range of the LP2985IM5-3.3?
The input voltage range is from 2.5 V to 16 V.
- What is the maximum output current of the LP2985IM5-3.3?
The maximum output current is up to 150 mA.
- What is the output voltage accuracy of the new chip?
The output voltage accuracy is ±0.5% for the new chip.
- What is the typical shutdown current of the LP2985IM5-3.3?
The typical shutdown current is 1.12 μA.
- What is the PSRR at 1 kHz and 1 MHz?
The PSRR is 70 dB at 1 kHz and 40 dB at 1 MHz.
- What type of package is the LP2985IM5-3.3 available in?
The LP2985IM5-3.3 is available in a 5-pin SOT-23 (DBV) package.
- Does the LP2985IM5-3.3 have overcurrent and thermal protection?
Yes, it has integrated overcurrent protection and thermal shutdown.
- What is the operating junction temperature range of the LP2985IM5-3.3?
The operating junction temperature range is from -40°C to +125°C.
- What is the typical output noise voltage of the LP2985IM5-3.3?
The typical output noise voltage is 30 μVRMS with a 10-nF bypass capacitor.
- Does the LP2985IM5-3.3 have an output enable feature?
Yes, it has an output enable feature with an active-high ON/OFF pin.
