Overview
The LP2951CD-3.0R2G is a micropower low dropout (LDO) linear voltage regulator produced by onsemi. This device is designed to maintain proper regulation with an extremely low input-to-output voltage differential, making it ideal for battery-powered equipment where extending battery life is crucial. The LP2951 series features a very low quiescent bias current of 75 µA and can supply output currents in excess of 100 mA. It also includes internal current and thermal limiting protection for enhanced reliability.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage (3.0 V Version) | 2.970 | 3.000 | 3.030 | V |
| Output Voltage Tolerance (A Suffix) | ±0.5% | % | ||
| Input Voltage Range | 4.0 | 30 | V | |
| Output Current | 100 | mA | ||
| Dropout Voltage (IO = 100 mA) | 350 | 450 | mV | |
| Quiescent Bias Current | 75 | 120 | µA | |
| Operating Ambient Temperature Range | -40 | 125 | °C | |
| Package Type | SOIC-8 |
Key Features
- Low Quiescent Bias Current: 75 µA (typical), which helps in extending battery life in portable devices.
- Low Input-to-Output Voltage Differential: 50 mV at 100 µA and 380 mV at 100 mA, ensuring efficient voltage regulation.
- Programmable Output Voltage: Can be preset to 5.0 V, 3.3 V, or 3.0 V, or programmed from 1.25 V to 29 V using a resistor divider.
- Shutdown Input: Allows a logic level signal to turn-off or turn-on the regulator output.
- Error Output: Signals external circuitry of an out-of-regulation condition or can be used as a microprocessor power-on reset.
- Internal Current and Thermal Limiting Protection: Ensures the device operates within safe limits.
- Tight Line and Load Regulation: Maintains stable output voltage under varying input and load conditions.
- Low Output Noise Voltage: Reduces noise in the output, making it suitable for sensitive applications.
Applications
- Battery-Powered Equipment: Ideal for extending the useful life of batteries in portable devices.
- Consumer Electronics: Suitable for a wide range of consumer electronics where low power consumption is critical.
- Industrial Equipment: Used in industrial applications requiring stable and efficient voltage regulation.
- Automotive and Avionics: Applicable in automotive and avionics systems due to its robust and reliable performance.
- Logistics and Robotics: Used in logistics robot CPU boards and other robotic applications.
- Optical Line Cards: Suitable for optical line card applications requiring stable voltage regulation.
Q & A
- What is the typical quiescent bias current of the LP2951CD-3.0R2G?
The typical quiescent bias current is 75 µA.
- What is the maximum output current of the LP2951CD-3.0R2G?
The maximum output current is 100 mA.
- What is the input voltage range for the LP2951CD-3.0R2G?
The input voltage range is from 4.0 V to 30 V.
- What is the dropout voltage at 100 mA output current?
The dropout voltage at 100 mA output current is between 350 mV and 450 mV.
- Does the LP2951CD-3.0R2G have internal protection features?
Yes, it includes internal current and thermal limiting protection.
- What is the purpose of the Error Output feature in the LP2951CD-3.0R2G?
The Error Output can signal external circuitry of an out-of-regulation condition or be used as a microprocessor power-on reset.
- How can the output voltage of the LP2951CD-3.0R2G be adjusted?
The output voltage can be preset to 5.0 V, 3.3 V, or 3.0 V, or programmed from 1.25 V to 29 V using a resistor divider.
- What is the operating ambient temperature range for the LP2951CD-3.0R2G?
The operating ambient temperature range is from -40°C to 125°C.
- What package type is the LP2951CD-3.0R2G available in?
The LP2951CD-3.0R2G is available in the SOIC-8 package type.
- Why is the LP2951CD-3.0R2G suitable for battery-powered devices?
It is suitable due to its low quiescent bias current and low input-to-output voltage differential, which help in extending battery life.
