Overview
The LP2950CDT-3.3RKG is a micropower voltage regulator produced by onsemi. It is part of the LP2950 and LP2951 series, designed to maintain proper regulation with an extremely low input-to-output voltage differential. This device is particularly suited 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 | 3.267 | 3.300 | 3.333 | V |
| Output Voltage Tolerance (TA = -40 to +125°C) | 3.234 | 3.366 | 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 | ||
| Thermal Resistance, Junction-to-Ambient | RθJA | 105 | °C/W |
Key Features
- Low Quiescent Bias Current: 75 µA, making it ideal 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 a logic level signal to turn-off or turn-on the regulator output (available in LP2951 models).
- Error Output: Signals an out-of-regulation condition or can be used as a microprocessor power-on reset (available in LP2951 models).
- Programmable Output Voltage: Can be programmed from 1.25 V to 29 V using external resistors (available in LP2951 models).
- Pb-Free and RoHS Compliant: Meets environmental standards.
- AEC-Q100 Qualified and PPAP Capable: Suitable for automotive and other applications requiring unique site and control change requirements.
Applications
The LP2950CDT-3.3RKG is suitable for a variety of applications, including:
- Battery-powered computer equipment
- Consumer electronics
- Industrial equipment where low power consumption and extended battery life are essential
- Automotive systems requiring AEC-Q100 qualification
Q & A
- What is the typical output voltage of the LP2950CDT-3.3RKG?
The typical output voltage is 3.3 V, with a tolerance of ±0.5% for the 'A' suffix devices.
- What is the quiescent bias current of the LP2950CDT-3.3RKG?
The quiescent bias current is 75 µA.
- What is the maximum output current of the LP2950CDT-3.3RKG?
The device can supply output currents in excess of 100 mA.
- Does the LP2950CDT-3.3RKG have internal protection features?
Yes, it has internal current and thermal limiting protection.
- What is the operating ambient temperature range of the LP2950CDT-3.3RKG?
The operating ambient temperature range is -40°C to +125°C.
- Is the LP2950CDT-3.3RKG Pb-Free and RoHS Compliant?
Yes, it is Pb-Free and RoHS Compliant.
- Can the LP2950CDT-3.3RKG be used in automotive applications?
Yes, it is AEC-Q100 Qualified and PPAP Capable, making it suitable for automotive and other applications requiring unique site and control change requirements.
- What type of capacitor is recommended for stability?
A 1.0 µF (or greater) capacitance between the output terminal and ground is recommended for stability. Solid tantalums or appropriate multilayer ceramic capacitors are suggested.
- Does the LP2950CDT-3.3RKG have a shutdown feature?
No, the shutdown feature is available in the LP2951 models, not the LP2950 models.
- Can the output voltage of the LP2950CDT-3.3RKG be programmed?
No, the LP2950 models do not have a programmable output voltage feature. This feature is available in the LP2951 models.
