Overview
The LP2950ACDT-3.3RG 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 LP2950ACDT-3.3RG is specifically configured to provide a fixed output voltage of 3.3V with high accuracy and stability. It features a low quiescent bias current, internal current and thermal limiting protection, and requires only a minimal output capacitor for stability.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (3.3 V Version) | VO | 3.260 | 3.300 | 3.340 | V |
| Input-to-Output Voltage Differential | VI - VO | 50 | - | 380 | mV |
| Quiescent Bias Current | ICC | 93 | - | 120 | μA |
| Dropout Voltage | VI - VO | 350 | - | 450 | mV |
| Current Limit | ILimit | 220 | - | 300 | 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.
- Shutdown Input: Allows the regulator to be turned on or off using a logic level signal (applicable to LP2951 models).
- Error Output: Signals external circuitry of an out-of-regulation condition or can be used as a microprocessor power-on reset (applicable to LP2951 models).
- Adjustable Output Voltage: Can be programmed from 1.25 V to 29 V using external resistors (applicable to LP2951 models).
- Minimal Output Capacitor Requirement: Requires only a 1.0 μF output capacitor for stability.
Applications
The LP2950ACDT-3.3RG is ideally suited for a variety of applications, including:
- Battery-powered computer and consumer electronics.
- Industrial equipment where low power consumption and high reliability are essential.
- Portable devices requiring stable and efficient power regulation.
- Automotive systems (especially models with the NCV prefix, which are designed for automotive and other applications requiring site and change control).
Q & A
- What is the typical output voltage of the LP2950ACDT-3.3RG?
The typical output voltage is 3.300 V, with a tolerance of ±0.5% for the 'A' suffix devices.
- What is the quiescent bias current of the LP2950ACDT-3.3RG?
The quiescent bias current is 75 μA.
- What is the input-to-output voltage differential of the LP2950ACDT-3.3RG?
The input-to-output voltage differential is 50 mV at 100 μA and 380 mV at 100 mA.
- Does the LP2950ACDT-3.3RG have internal protection features?
Yes, it has internal current and thermal limiting protection.
- What is the operating ambient temperature range of the LP2950ACDT-3.3RG?
The operating ambient temperature range is -40°C to +125°C.
- Can the output voltage of the LP2950ACDT-3.3RG be adjusted?
No, the LP2950ACDT-3.3RG is a fixed voltage regulator. However, the LP2951 series, which is similar, can be programmed for adjustable output voltage.
- What type of capacitor is required for stability?
A 1.0 μF capacitor is required between the output terminal and ground for stability.
- Is the LP2950ACDT-3.3RG suitable for automotive applications?
While the LP2950 itself is not specifically marked for automotive use, the NCV2951 series, which is similar, is designed for automotive and other applications requiring site and change control.
- What is the maximum die junction temperature of the LP2950ACDT-3.3RG?
The maximum die junction temperature is 150°C.
- Does the LP2950ACDT-3.3RG have a shutdown feature?
No, the LP2950 does not have a shutdown feature. However, the LP2951 series includes a shutdown input.
