Overview
The LP2951ACN/NOPB is a micropower voltage regulator produced by Texas Instruments. It is part of the LP2950-N and LP2951-N series, known for their high accuracy output voltage, low quiescent current, and low dropout voltage. These regulators are ideal for use in battery-powered systems due to their minimal power consumption and robust performance characteristics. The LP2951ACN/NOPB offers fixed output voltage options of 5 V, 3 V, and 3.3 V, as well as a programmable output voltage range from 1.24 V to 29 V using external resistors. Additional features include a shutdown input and an error flag output, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.3 V to 30 V | V |
| Output Voltage Options | 5 V, 3 V, 3.3 V (fixed), 1.24 V to 29 V (programmable) | 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 |
| Line Regulation | 0.05% (typical) | % |
| Load Regulation | 0.05% (typical) | % |
| Output Voltage Temperature Coefficient | Very low | %/°C |
| Package Options | SOIC, VSSOP, WSON, PDIP | - |
| ESD Rating | ±2500 V (HBM) | V |
Key Features
- High accuracy output voltage with a tight initial tolerance (0.5% typical) and very low output voltage temperature coefficient.
- Low quiescent current (75 µA typical) and low dropout voltage (typical 40 mV at light loads and 380 mV at 100 mA).
- Fixed output voltage options of 5 V, 3 V, and 3.3 V, and programmable output voltage from 1.24 V to 29 V using external resistors.
- Logic-controlled electronic shutdown and error flag output for low output voltage detection.
- Current and thermal limiting for enhanced reliability.
- Stable with low-ESR output capacitors (10 mΩ to 6 Ω).
- Internal protection circuitry including foldback current limit and thermal shutdown.
Applications
- High-efficiency linear regulators in battery-powered systems.
- Regulators with undervoltage shutdown.
- Low dropout battery-powered regulators.
- Snap-ON/Snap-OFF regulators.
- Power-on reset circuits using the error flag output.
Q & A
- What is the input voltage range of the LP2951ACN/NOPB? The input voltage range is from 2.3 V to 30 V.
- What are the fixed output voltage options available for the LP2951ACN/NOPB? The fixed output voltage options are 5 V, 3 V, and 3.3 V.
- Can the output voltage of the LP2951ACN/NOPB be programmed? Yes, the output voltage can be programmed from 1.24 V to 29 V using external resistors.
- What is the typical quiescent current of the LP2951ACN/NOPB? The typical quiescent current is 75 µA.
- What is the dropout voltage of the LP2951ACN/NOPB? The typical dropout voltage is 40 mV at light loads and 380 mV at 100 mA.
- Does the LP2951ACN/NOPB have a shutdown feature? Yes, it has a logic-controlled electronic shutdown feature.
- What is the purpose of the error flag output on the LP2951ACN/NOPB? The error flag output warns of a low output voltage and can be used for a power-on reset.
- What are the package options available for the LP2951ACN/NOPB? The package options include SOIC, VSSOP, WSON, and PDIP.
- What is the ESD rating of the LP2951ACN/NOPB? The ESD rating is ±2500 V (HBM).
- What are some common applications of the LP2951ACN/NOPB? Common applications include high-efficiency linear regulators, regulators with undervoltage shutdown, and low dropout battery-powered regulators.
