Overview
The LP2951CD-3.3G 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 LP2951CD-3.3G is capable of supplying output currents up to 100 mA and features a very low quiescent bias current of 75 µA. It is available in an SOIC-8 package and offers several key features such as a shutdown input, errorbar output, and programmable output voltage.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 3.3 | V |
| Output Current | 100 | mA |
| Input Voltage Range | 4.3 to 30 | V |
| Dropout Voltage (IO = 100 mA) | 350 to 450 | mV |
| Quiescent Bias Current (IO = 100 µA) | 93 to 120 | µA |
| Quiescent Bias Current (IO = 100 mA) | 4.0 to 12 | mA |
| Output Voltage Tolerance | ±0.5% | |
| Operating Ambient Temperature Range | -40 to +125 | °C |
| Package | SOIC-8 |
Key Features
- Low quiescent bias current of 75 µA, minimizing power consumption.
- Low input-to-output voltage differential, ensuring efficient voltage regulation.
- Internal current and thermal limiting protection to prevent overheating and overcurrent conditions.
- Shutdown input allowing a logic level signal to turn-off or turn-on the regulator output.
- Errorbar output that can signal external circuitry of an out-of-regulation condition or serve as a microprocessor power-on reset.
- Programmable output voltage from 1.25 V to 29 V using a pinned-out resistor divider and direct access to the error amplifier feedback input.
- Requires only a 1.0 µF output capacitor for stability.
- Extremely tight line and load regulation, ensuring stable output voltage under varying conditions.
Applications
- Battery-powered computer and consumer equipment where extending battery life is desirable.
- Industrial equipment requiring low power consumption and stable voltage regulation.
- Automotive and avionics applications, such as RADAR systems.
- Logistics robot CPU boards and optical line cards.
Q & A
- What is the output voltage of the LP2951CD-3.3G?
The output voltage of the LP2951CD-3.3G is 3.3 V.
- What is the maximum output current of the LP2951CD-3.3G?
The maximum output current is 100 mA.
- What is the input voltage range for the LP2951CD-3.3G?
The input voltage range is from 4.3 V to 30 V.
- What is the quiescent bias current of the LP2951CD-3.3G?
The quiescent bias current is typically 75 µA).
- Does the LP2951CD-3.3G have internal protection features?
Yes, it has internal current and thermal limiting protection).
- What is the purpose of the shutdown input on the LP2951CD-3.3G?
The shutdown input allows a logic level signal to turn-off or turn-on the regulator output).
- Can the output voltage of the LP2951CD-3.3G be programmed?
Yes, the output voltage can be programmed from 1.25 V to 29 V using a resistor divider and access to the error amplifier feedback input).
- What type of package is the LP2951CD-3.3G available in?
The LP2951CD-3.3G is available in an SOIC-8 package).
- What is the operating ambient temperature range for the LP2951CD-3.3G?
The operating ambient temperature range is from -40°C to +125°C).
- What is the minimum output capacitor required for stability?
A minimum of 1.0 µF output capacitor is required for stability).
