Overview
The LP2951CMX/NOPB is a micropower voltage regulator produced by Texas Instruments. It is part of the LP2951-N series, known for its very low quiescent current and low dropout voltage, making it ideal for battery-powered systems. This regulator offers high accuracy output voltage, ensured 100-mA output current, and extremely tight load and line regulation. The LP2951-N series is designed to minimize all contributions to the error budget, including a tight initial tolerance, good load and line regulation, and a very low output voltage temperature coefficient, making it useful as a low-power voltage reference.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.3 V to 30 V | V |
| Output Voltage Versions | 5 V, 3 V, 3.3 V (and programmable from 1.24 V to 29 V) | V |
| Output Current | 100 mA | mA |
| Quiescent Current | 75 µA (typical) | µA |
| Dropout Voltage | 40 mV (typical at light loads), 380 mV (typical at 100 mA) | mV |
| Operating Temperature Range | -40°C to 125°C | °C |
| Package Type | SOIC (D) with 8 pins |
Key Features
- High accuracy output voltage with a tight initial tolerance (0.5% typical)
- Extremely low quiescent current (75 µA typical)
- Low dropout voltage (typical 40 mV at light loads and 380 mV at 100 mA)
- Extremely tight load and line regulation (0.05% typical)
- Very low temperature coefficient
- Use as regulator or reference
- Needs minimum capacitance for stability
- Current and thermal limiting
- Stable with low-ESR output capacitors (10 mΩ to 6 Ω)
- Error flag output warns of output dropout
- Logic-controlled electronic shutdown
- Output programmable from 1.24 V to 29 V with external resistors
Applications
- High-efficiency linear regulator
- Regulator with undervoltage shutdown
- Low dropout battery-powered regulator
- Snap-ON/Snap-OFF regulator
- Battery-powered systems requiring low power consumption and high accuracy voltage regulation
Q & A
- What is the input voltage range of the LP2951CMX/NOPB?
The input voltage range is from 2.3 V to 30 V.
- What are the available output voltage versions for the LP2951-N?
The available output voltage versions are 5 V, 3 V, and 3.3 V, and it can also be programmed from 1.24 V to 29 V with external resistors.
- What is the typical quiescent current of the LP2951-N?
The typical quiescent current is 75 µA.
- What is the dropout voltage of the LP2951-N?
The dropout voltage is typically 40 mV at light loads and 380 mV at 100 mA.
- What is the operating temperature range of the LP2951CMX/NOPB?
The operating temperature range is from -40°C to 125°C.
- What package type is the LP2951CMX/NOPB available in?
The LP2951CMX/NOPB is available in an SOIC (D) package with 8 pins.
- Does the LP2951-N have an error flag feature?
- Can the LP2951-N be shut down electronically?
- Is the LP2951-N stable with low-ESR output capacitors?
- What are some typical applications of the LP2951-N?
The LP2951-N is typically used in high-efficiency linear regulators, regulators with undervoltage shutdown, low dropout battery-powered regulators, and snap-ON/snap-OFF regulators.
