Overview
The LP2951ACMM is a micropower voltage regulator produced by National Semiconductor, now part of Texas Instruments. This regulator is known for its very low quiescent current and low dropout voltage, making it ideal for battery-powered systems and other applications where power efficiency is crucial. The LP2951 series offers adjustable and fixed output voltage versions, with the LP2951ACMM specifically providing a fixed output voltage of 3.3V.
Key Specifications
| Parameter | Value |
|---|---|
| Regulator Type | Low Dropout Voltage (LDO) |
| Number of Outputs | 1 |
| Output Voltage | 3.3 V (fixed) |
| Maximum Output Current | 100 mA |
| Maximum Input Voltage | 30 V |
| Minimum Input Voltage | 2.3 V |
| Dropout Voltage (typical) | 0.38 V at 100 mA |
| Quiescent Current (typical) | 75 µA |
| Line Regulation | 0.1 % |
| Load Regulation | 0.1 % |
| Accuracy | ±0.5 % |
| Mounting Type | Surface Mount |
| Package Type | MSOP-8 |
| Minimum Operating Temperature | -40 °C |
| Maximum Operating Temperature | 125 °C |
Key Features
- Extremely low quiescent current of 75 µA typical, which helps in prolonging battery life in battery-powered systems.
- Very low dropout voltage of 0.38 V at 100 mA, making it suitable for applications where the input-output differential is small.
- High accuracy output voltage with a tolerance of ±0.5%.
- Tight line and load regulation of 0.1% each.
- Logic-controlled electronic shutdown and error flag for output dropout (in some versions).
- Stable operation with low-ESR output capacitors.
- Current and thermal limiting for protection.
Applications
- Battery-powered systems where low power consumption is critical.
- High-efficiency linear regulators in various electronic devices.
- Regulators with undervoltage shutdown for protective measures.
- Snap-ON/Snap-OFF regulators in applications requiring quick power management.
- General-purpose voltage regulation in embedded systems, IoT devices, and other low-power electronics.
Q & A
- What is the typical quiescent current of the LP2951ACMM?
The typical quiescent current is 75 µA.
- What is the maximum output current of the LP2951ACMM?
The maximum output current is 100 mA.
- What is the fixed output voltage of the LP2951ACMM?
The fixed output voltage is 3.3 V.
- What is the maximum input voltage for the LP2951ACMM?
The maximum input voltage is 30 V.
- What is the typical dropout voltage at 100 mA for the LP2951ACMM?
The typical dropout voltage at 100 mA is 0.38 V.
- Does the LP2951ACMM have an error flag for output dropout?
Yes, some versions of the LP2951 series have an error flag for output dropout, but this specific feature may vary by version.
- What is the operating temperature range for the LP2951ACMM?
The operating temperature range is from -40 °C to 125 °C.
- What type of package does the LP2951ACMM use?
The LP2951ACMM uses an MSOP-8 package.
- Is the LP2951ACMM suitable for surface mount applications?
Yes, it is designed for surface mount applications.
- What is the line regulation of the LP2951ACMM?
The line regulation is 0.1%.
