Overview
The LP2951ACD-3.0 is a micropower low dropout (LDO) linear voltage regulator produced by onsemi. It is designed to maintain proper regulation with an extremely low input-to-output voltage differential. This device features a very low quiescent bias current of 75 µA and is capable of supplying output currents in excess of 100 mA. The LP2951 series includes internal current and thermal limiting protection, making it suitable for a variety of applications where power efficiency and reliability are crucial.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (3.0 V Versions) | VO | 2.970 | 3.000 | 3.030 | V |
| Output Voltage Tolerance (TA = 25°C) | 2.985 | 3.000 | 3.015 | V | |
| Output Voltage Tolerance (TA = -40 to +125°C) | 2.940 | 3.060 | V | ||
| Dropout Voltage (IO = 100 mA) | VI - VO | 350 | 450 | mV | |
| Supply Bias Current (IO = 100 mA) | ICC | 4.0 | 12 | mA | |
| Current Limit (VO Shorted to Ground) | ILimit | 220 | 300 | mA | |
| Operating Ambient Temperature Range | TA | -40 | +125 | °C |
Key Features
- Low Quiescent Bias Current: 75 µA, 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.
- Programmable Output Voltage: Can be programmed from 1.25 V to 29 V using external resistors.
- Error Output: Signals an out of regulation condition or can be used as a microprocessor power-on reset.
- Shutdown Input: Allows a logic level signal to turn-off or turn-on the regulator output.
- Internal Current and Thermal Limiting: Provides protection against overcurrent and overheating.
- Low Dropout Voltage: Ensures stable output voltage even with low input voltage.
- Stability with Minimal Capacitance: Requires only a 1.0 µF output capacitor for stability.
- AEC-Q100 Qualified and PPAP Capable: Suitable for automotive and other applications requiring strict quality standards.
- Pb-Free and RoHS Compliant: Environmentally friendly and compliant with regulatory standards.
Applications
- Battery Powered Devices: Ideal for extending battery life in portable computers, consumer electronics, and industrial equipment.
- Automotive Systems: Suitable for automotive applications due to its AEC-Q100 qualification and PPAP capability.
- Avionics and RADAR Systems: Used in avionics and RADAR systems where reliable power regulation is critical.
- Logistics Robot CPU Boards: Applied in robotics for stable and efficient power supply.
- Optical Line Cards: Used in telecommunications for reliable power regulation in optical line cards.
Q & A
- What is the typical quiescent bias current of the LP2951ACD-3.0?
The typical quiescent bias current is 75 µA.
- What is the maximum output current of the LP2951ACD-3.0?
The device can supply output currents in excess of 100 mA.
- What is the dropout voltage at 100 mA for the LP2951ACD-3.0?
The dropout voltage at 100 mA is between 350 mV and 450 mV.
- Can the output voltage of the LP2951ACD-3.0 be programmed?
Yes, the output voltage can be programmed from 1.25 V to 29 V using external resistors.
- What is the purpose of the Error Output feature in the LP2951ACD-3.0?
The Error Output signals an out of regulation condition or can be used as a microprocessor power-on reset.
- How does the Shutdown input work on the LP2951ACD-3.0?
The Shutdown input allows a logic level signal to turn-off or turn-on the regulator output.
- What kind of protection does the LP2951ACD-3.0 have against overcurrent and overheating?
The device has internal current and thermal limiting protection.
- What is the minimum output capacitor required for stability?
The device requires only a 1.0 µF output capacitor for stability.
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Yes, it is AEC-Q100 qualified and PPAP capable.
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Yes, it is Pb-Free and RoHS compliant.
