Overview
The LP2951CD is a micropower low dropout (LDO) linear voltage regulator produced by ON Semiconductor. This device is designed to maintain proper regulation with an extremely low input-to-output voltage differential, making it ideal for battery-powered devices and applications where extending battery life is crucial. The LP2951CD features a low quiescent bias current of 75 µA and can supply output currents up to 100 mA. It is available in an 8-pin SOIC package, which is suitable for surface mount applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer | ON Semiconductor | |
| Package Type | SOIC-8 | |
| Output Voltage | 3.0 V (for LP2951CD-3.0R2G) | V |
| Output Current | 100 mA | mA |
| Input Voltage Range | 1.25 V to 30 V | V |
| Quiescent Bias Current | 75 µA | µA |
| Dropout Voltage | 50 mV at 100 mA, 380 mV at 100 mA | mV |
| Operating Temperature Range | -40°C to +125°C | °C |
| Output Voltage Tolerance | +/- 0.5% (for 'A' suffix devices) | % |
| Internal Protection | Current and Thermal Limiting |
Key Features
- Error Output: Signals an out-of-regulation condition or can be used as a microprocessor power-on reset.
- 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 and access to the Error Amplifier feedback input.
- Shutdown Input: Allows a logic level signal to turn off or turn on the regulator output.
- Low Quiescent Bias Current: 75 µA, which helps in extending battery life in portable devices.
- Low Dropout Voltage: 50 mV at 100 mA and 380 mV at 100 mA, ensuring efficient voltage regulation.
- Tight Line and Load Regulation: Maintains stable output voltage under varying input and load conditions.
- Internal Current and Thermal Limiting: Protects the device from overcurrent and overheating.
- Stability with Minimal Capacitance: Requires only a 1.0 µF output capacitor for stability.
Applications
- Battery-Powered Devices: Ideal for extending the useful battery life in portable electronics.
- Consumer Electronics: Suitable for use in consumer devices where low power consumption is critical.
- Industrial Equipment: Used in industrial applications requiring stable and efficient voltage regulation.
- Automotive Systems: Can be used in automotive applications due to its robust specifications and protection features.
- Avionics and RADAR Systems: Applicable in avionics and RADAR systems where reliable voltage regulation is essential.
- Logistics Robot CPU Boards and Optical Line Cards: Used in various embedded systems requiring stable power supply.
Q & A
- What is the primary function of the LP2951CD?
The LP2951CD is a micropower low dropout (LDO) linear voltage regulator designed to maintain proper voltage regulation with a low input-to-output voltage differential.
- What are the key features of the LP2951CD?
The key features include an error output, programmable output voltage, shutdown input, low quiescent bias current, low dropout voltage, tight line and load regulation, internal current and thermal limiting, and stability with minimal capacitance.
- What is the output current capability of the LP2951CD?
The LP2951CD can supply output currents up to 100 mA.
- What is the input voltage range for the LP2951CD?
The input voltage range is from 1.25 V to 30 V.
- What is the quiescent bias current of the LP2951CD?
The quiescent bias current is 75 µA.
- What type of protection does the LP2951CD have?
The device has internal current and thermal limiting protection.
- What is the operating temperature range for the LP2951CD?
The operating temperature range is from -40°C to +125°C.
- What is the typical dropout voltage for the LP2951CD?
The typical dropout voltage is 50 mV at 100 mA and 380 mV at 100 mA.
- What are some common applications for the LP2951CD?
Common applications include battery-powered devices, consumer electronics, industrial equipment, automotive systems, avionics, and logistics robot CPU boards.
- What package type is the LP2951CD available in?
The LP2951CD is available in an 8-pin SOIC package.
