Overview
The LP2951ACD-3.3 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.
The LP2951ACD-3.3 offers several key features that make it versatile and reliable, including a low quiescent bias current, internal current and thermal limiting protection, and the ability to be programmed for various output voltages.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (3.3 V Versions) | VO | 3.260 | 3.300 | 3.340 | 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 |
| Maximum Die Junction Temperature Range | TJ | - | - | 150 | °C |
| Storage Temperature Range | Tstg | -65 | - | 150 | °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.
- Logic Level Shutdown Input: Allows the regulator output to be turned on or off using a logic level signal.
- Internal Current and Thermal Limiting Protection: Ensures device safety under overload conditions.
- Tight Line and Load Regulation: Maintains stable output voltage across various input and load conditions.
- Pb-Free and RoHS Compliant: Meets environmental standards for lead-free and RoHS compliance.
Applications
The LP2951ACD-3.3 is suitable for a variety of applications, including:
- Battery-powered computer and consumer electronics.
- Industrial equipment requiring low power consumption and high reliability.
- Automotive systems (with the NCV prefix for automotive and other applications requiring unique site and control change requirements).
- Any system needing a stable, low-dropout voltage regulator with programmable output and shutdown capabilities.
Q & A
- What is the typical quiescent bias current of the LP2951ACD-3.3?
The typical quiescent bias current is 75 µA.
- What is the dropout voltage at 100 mA load current?
The dropout voltage at 100 mA load current is between 350 mV and 450 mV.
- Can the output voltage of the LP2951ACD-3.3 be programmed?
- What is the purpose of the error output feature?
The error output signals an out-of-regulation condition or can be used as a microprocessor power-on reset.
- How can the regulator output be controlled?
The regulator output can be turned on or off using a logic level signal through the shutdown input.
- What is the operating ambient temperature range of the LP2951ACD-3.3?
The operating ambient temperature range is from -40°C to +125°C.
- Is the LP2951ACD-3.3 Pb-Free and RoHS compliant?
- What is the maximum die junction temperature of the LP2951ACD-3.3?
The maximum die junction temperature is 150°C.
- What type of protection does the LP2951ACD-3.3 have?
- What is the minimum recommended load current for the LP2951ACD-3.3?
