Overview
The LP2951ACM/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. The regulator offers high accuracy output voltage, ensured 100-mA output current, and extremely tight load and line regulation. It is available in an 8-pin SOIC (D) package and operates over a wide temperature range from -40°C to 125°C.
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 |
| Load Regulation | 0.05% (typical) | % |
| Line Regulation | 0.05% (typical) | % |
| Temperature Coefficient | Very low | - |
| Operating Temperature Range | -40°C to 125°C | °C |
| Package | SOIC (D) with 8 pins | - |
Key Features
The LP2951ACM/NOPB features several key attributes that make it a versatile and reliable choice for various applications:
- High accuracy output voltage with a tight initial tolerance (0.5% typical).
- Extremely low quiescent current (75 µA typical) and low dropout voltage, which helps in prolonging battery life.
- Extremely tight load and line regulation (0.05% typical).
- Very low temperature coefficient, making it useful as a low-power voltage reference.
- Current and thermal limiting for protection.
- Stable with low-ESR output capacitors (10 mΩ to 6 Ω).
- Error flag output that warns of low output voltage, often due to falling batteries on the input.
- Logic-controlled electronic shutdown.
- Output programmable from 1.24 V to 29 V with external resistors.
Applications
The LP2951ACM/NOPB is suitable for a variety of applications, including:
- High-efficiency linear regulators.
- Regulators with undervoltage shutdown.
- Low dropout battery-powered regulators.
- Snap-ON/Snap-OFF regulators.
- Battery-powered systems where low quiescent current and high accuracy are crucial.
Q & A
- What is the input voltage range of the LP2951ACM/NOPB?
The input voltage range is from 2.3 V to 30 V.
- What are the available output voltage versions for the LP2951ACM/NOPB?
The regulator is available in 5 V, 3 V, and 3.3 V versions, and it can also be programmed from 1.24 V to 29 V with external resistors.
- What is the typical quiescent current of the LP2951ACM/NOPB?
The typical quiescent current is 75 µA.
- What is the dropout voltage of the LP2951ACM/NOPB?
The dropout voltage is typically 40 mV at light loads and 380 mV at 100 mA.
- Does the LP2951ACM/NOPB have built-in protection features?
- Can the LP2951ACM/NOPB be used as a voltage reference?
- What is the operating temperature range of the LP2951ACM/NOPB?
- What package type is the LP2951ACM/NOPB available in?
- Does the LP2951ACM/NOPB support logic-controlled shutdown?
- Is the LP2951ACM/NOPB stable with low-ESR output capacitors?
