Overview
The LP2951ACMX/NOPB is a micropower voltage regulator produced by Texas Instruments. It is part of the LP2950-N and LP2951-N series, known for their very low quiescent current and low dropout voltage. These regulators are ideally suited for battery-powered systems, as they prolong battery life by maintaining a low quiescent current even in dropout conditions. The LP2951ACMX/NOPB offers high accuracy output voltage, tight load and line regulation, and a very low temperature coefficient, making it useful as a low-power voltage reference or regulator.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value |
|---|---|---|---|
| Input Voltage Range | 2.3 V to 30 V | 2.3 V | 30 V |
| Output Voltage | Programmable from 1.24 V to 29 V | 1.24 V | 29 V |
| Output Current | 100 mA | - | 100 mA |
| Quiescent Current | 75 µA | - | - |
| Dropout Voltage | 40 mV at light loads, 380 mV at 100 mA | - | - |
| Load Regulation | 0.05% typical | - | - |
| Line Regulation | 0.05% typical | - | - |
| Temperature Coefficient | Very low | - | - |
| Operating Temperature Range | -40°C to 125°C | -40°C | 125°C |
| Package Type | SOIC (D) with 8 pins | - | - |
Key Features
- High accuracy output voltage with a tight initial tolerance (0.5% typical)
- Ensured 100-mA output current
- 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 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 LP2951ACMX/NOPB? The input voltage range is from 2.3 V to 30 V.
- What is the typical output current of the LP2951ACMX/NOPB? The typical output current is 100 mA.
- What is the quiescent current of the LP2951ACMX/NOPB? The quiescent current is typically 75 µA.
- What are the available output voltage versions for the LP2951ACMX/NOPB? The output voltage can be programmed from 1.24 V to 29 V, or pin-strapped for 5-V, 3-V, or 3.3-V output.
- What is the operating temperature range of the LP2951ACMX/NOPB? The operating temperature range is from -40°C to 125°C.
- What package type is the LP2951ACMX/NOPB available in? It is available in an SOIC (D) package with 8 pins.
- Does the LP2951ACMX/NOPB have an error flag feature? Yes, it has an error flag output that warns of a low output voltage.
- Can the LP2951ACMX/NOPB be shut down electronically? Yes, it has a logic-controlled electronic shutdown feature.
- Is the LP2951ACMX/NOPB stable with low-ESR output capacitors? Yes, it is stable with low-ESR output capacitors (10 mΩ to 6 Ω).
- What are some common applications of the LP2951ACMX/NOPB? Common applications include high-efficiency linear regulators, regulators with undervoltage shutdown, low dropout battery-powered regulators, and Snap-ON/Snap-OFF regulators.
