Overview
The LP2985IM5X-4.0/NOPB is a low-noise, ultra-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 LP2985IM5X-4.0/NOPB features a fixed output voltage of 4.0 V, making it suitable for a variety of applications requiring stable and low-noise power supply.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VIN Range | 2.5 V to 16 V | V |
| VOUT Range | Fixed: 4.0 V | V |
| VOUT Accuracy | ±0.5% (new chip) | % |
| Output Current | Up to 150 mA | mA |
| Quiescent Current (ILOAD = 0 mA) | 71 μA | μA |
| Quiescent Current (ILOAD = 150 mA) | 850 μA | μA |
| Shutdown Current | 1.12 μA (typ) | μA |
| Output Noise Voltage (RMS) | 30 μVRMS (with 10-nF bypass capacitor) | μVRMS |
| 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
- Ultra-low dropout voltage of 300 mV
- High PSRR (Power Supply Rejection Ratio) of 70 dB at 1 kHz and 40 dB at 1 MHz
- Low output noise of 30 μVRMS with a 10-nF bypass capacitor
- Output current limiting and thermal protection
- Internal soft-start mechanism for controlled inrush current
- Stable with low-ESR ceramic output capacitors
- Overcurrent and overtemperature protection
- Output enable pin for independent control of the output voltage
- Low quiescent current: 71 μA at ILOAD = 0 mA and 850 μA at ILOAD = 150 mA
Applications
- Cellular phones
- Palmtop and laptop computers
- Personal Digital Assistants (PDA)
- Camcorders, personal stereos, cameras
- Washers and dryers
- Land mobile radios
- Active antenna systems for mMIMO
- Cordless power tools
- Motor drives and control boards
Q & A
- What is the input voltage range of the LP2985IM5X-4.0/NOPB?
The input voltage range is from 2.5 V to 16 V.
- What is the fixed output voltage of the LP2985IM5X-4.0/NOPB?
The fixed output voltage is 4.0 V.
- What is the maximum output current of the LP2985IM5X-4.0/NOPB?
The maximum output current is up to 150 mA.
- What is the quiescent current at no load and full load for the LP2985IM5X-4.0/NOPB?
The quiescent current is 71 μA at no load and 850 μA at full load (150 mA).
- What is the output noise voltage of the LP2985IM5X-4.0/NOPB with a bypass capacitor?
The output noise voltage is 30 μVRMS with a 10-nF bypass capacitor.
- What is the PSRR of the LP2985IM5X-4.0/NOPB at 1 kHz and 1 MHz?
The PSRR is 70 dB at 1 kHz and 40 dB at 1 MHz.
- What are the key protection features of the LP2985IM5X-4.0/NOPB?
The device includes overcurrent protection, thermal protection, and output current limiting.
- What type of capacitors can be used with the LP2985IM5X-4.0/NOPB for stability?
The device is stable with low-ESR ceramic output capacitors.
- What is the operating junction temperature range of the LP2985IM5X-4.0/NOPB?
The operating junction temperature range is from –40°C to +125°C.
- What package type is the LP2985IM5X-4.0/NOPB available in?
The device is available in a 5-pin SOT-23 (DBV) package.
