Overview
The LP2951ACD-3.3G is a micropower voltage regulator produced by onsemi, designed to maintain proper regulation with an extremely low input-to-output voltage differential. This device is part of the LP2950 and LP2951 series, which are ideal for battery-powered computer, consumer, and industrial equipment where extending the useful battery life is crucial.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (3.3 V Version) | VO | 3.260 | 3.300 | 3.340 | V |
| Input Voltage Range | Vin | 4.3 | - | 30 | V |
| Output Current | IO | - | - | 100 | mA |
| Dropout Voltage (IO = 100 mA) | VI - VO | 350 | - | 450 | mV |
| Quiescent Bias Current (IO = 100 mA) | ICC | 4.0 | - | 12 | mA |
| Operating Ambient Temperature Range | TA | -40 | - | 125 | °C |
| Maximum Die Junction Temperature | TJ | - | - | 150 | °C |
| Storage Temperature Range | Tstg | -65 | - | 150 | °C |
Key Features
- Low Quiescent Bias Current: 75 µA, making it suitable for battery-powered devices.
- Low Input-to-Output Voltage Differential: 50 mV at 100 µA and 380 mV at 100 mA.
- Tight Line and Load Regulation: Ensures stable output voltage across various input and load conditions.
- Internal Current and Thermal Limiting Protection: Protects the device from overcurrent and overheating.
- Error Output: Signals an out-of-regulation condition or can be used as a microprocessor power-on reset.
- Programmable Output Voltage: Can be set from 1.25 V to 29 V using external resistors.
- Logic Level Shutdown Input: Allows the regulator output to be turned on or off with a logic level signal.
- Pb-Free and RoHS Compliant: Environmentally friendly and compliant with regulatory standards.
Applications
The LP2951ACD-3.3G is ideally suited for a variety of applications, including:
- Battery-powered computer systems
- Consumer electronics
- Industrial equipment where low power consumption and extended battery life are critical
- Automotive applications (with the NCV prefix for site and control change requirements)
Q & A
- What is the typical output voltage of the LP2951ACD-3.3G?
The typical output voltage is 3.3 V, with a tolerance of ±0.5%.
- What is the maximum output current of the LP2951ACD-3.3G?
The maximum output current is 100 mA.
- What is the dropout voltage at 100 mA output current?
The dropout voltage at 100 mA is between 350 mV and 450 mV.
- How does the error output feature work?
The error output signals an out-of-regulation condition and can be used as a microprocessor power-on reset. It trips when the output voltage falls more than approximately 5% below the regulated voltage.
- Can the output voltage be programmed?
Yes, the output voltage can be programmed from 1.25 V to 29 V using external resistors.
- What is the operating ambient temperature range of the LP2951ACD-3.3G?
The operating ambient temperature range is from -40°C to 125°C.
- Is the LP2951ACD-3.3G Pb-Free and RoHS compliant?
Yes, it is Pb-Free and RoHS compliant.
- What kind of protection does the LP2951ACD-3.3G have?
The device has internal current and thermal limiting protection.
- How does the shutdown input feature work?
The shutdown input allows the regulator output to be turned on or off with a logic level signal.
- What is the quiescent bias current of the LP2951ACD-3.3G?
The quiescent bias current is 75 µA.
