Overview
The LP2951CM/NOPB is a micropower voltage regulator produced by Texas Instruments. It is part of the LP2951-N series, known for its high accuracy output voltage, low quiescent current, and low dropout voltage. This regulator is ideal for use in battery-powered systems due to its minimal power consumption and robust features. The LP2951CM/NOPB is available in an 8-pin SOIC (D) package, making it suitable for a variety of applications requiring precise voltage regulation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.3 to 30 | V |
| Output Voltage Options | Fixed: 5 V, 3 V, 3.3 V; Programmable: 1.24 V to 29 V | V |
| Output Current | 100 mA | mA |
| Quiescent Current | 75 µA (typical) | µA |
| Dropout Voltage | 40 mV (light loads), 380 mV (100 mA) | mV |
| Output Voltage Accuracy | 0.5% (typical) | % |
| Load Regulation | 0.05% (typical) | % |
| Line Regulation | 0.05% (typical) | % |
| Temperature Coefficient | Very low | - |
| Package Type | SOIC (D) 8-pin | - |
| Thermal Resistance (Junction to Ambient) | 117.7 °C/W | °C/W |
Key Features
- High accuracy output voltage with a typical tolerance of 0.5%.
- Low quiescent current of 75 µA, extending battery life in portable devices.
- Low dropout voltage, ensuring stable output even at low input voltages.
- Programmable output voltage from 1.24 V to 29 V using external resistors.
- Logic-controlled electronic shutdown feature.
- Error flag output to warn of low output voltage, useful for power-on reset.
- Current and thermal limiting for enhanced reliability.
- Stable operation with low-ESR output capacitors.
- Minimal capacitance required for stability.
Applications
- High-efficiency linear regulators in battery-powered systems.
- Regulators with undervoltage shutdown for protecting against low input voltages.
- Low dropout battery-powered regulators for extending battery life.
- Snap-ON/Snap-OFF regulators for applications requiring quick power cycling.
- Voltage references in low-power systems due to high accuracy and low temperature coefficient.
Q & A
- What is the input voltage range of the LP2951CM/NOPB?
The input voltage range is from 2.3 V to 30 V.
- What are the available output voltage options for the LP2951CM/NOPB?
The regulator offers fixed output voltages of 5 V, 3 V, and 3.3 V, as well as a programmable output from 1.24 V to 29 V.
- What is the typical quiescent current of the LP2951CM/NOPB?
The typical quiescent current is 75 µA.
- What is the dropout voltage of the LP2951CM/NOPB?
The dropout voltage is typically 40 mV at light loads and 380 mV at 100 mA.
- Does the LP2951CM/NOPB have a shutdown feature?
- What is the purpose of the error flag output on the LP2951CM/NOPB?
The error flag output warns of a low output voltage, often due to falling batteries, and can be used for a power-on reset.
- What type of package is the LP2951CM/NOPB available in?
The regulator is available in an 8-pin SOIC (D) package.
- What is the thermal resistance (junction to ambient) of the LP2951CM/NOPB in the SOIC package?
The thermal resistance is 117.7 °C/W.
- Is the LP2951CM/NOPB stable with low-ESR output capacitors?
- What are some common applications of the LP2951CM/NOPB?
