Overview
The LP2950ACDT-5.0G is a micropower voltage regulator produced by onsemi, designed to provide low power and low dropout voltage regulation. This device is part of the LP2950 series, which is specifically engineered to maintain proper regulation with an extremely low input-to-output voltage differential. It is 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 (5.0 V Version) | VO | 4.975 | 5.000 | 5.025 | V |
| Output Voltage Tolerance (TA = 25°C) | ±0.5% | ||||
| 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 | |
| Thermal Resistance, Junction-to-Ambient | RθJA | 105 | °C/W |
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 operating conditions.
- Internal Current and Thermal Limiting Protection: Protects the device from overcurrent and overheating.
- Shutdown Input (LP2951): Allows a logic level signal to turn off or turn on the regulator output.
- Error Output (LP2951): Signals external circuitry of an out-of-regulation condition or serves as a microprocessor power-on reset.
- Programmable Output Voltage (LP2951): Can be set to 5.0 V, 3.3 V, or 3.0 V, or programmed from 1.25 V to 29 V.
- Stability with Minimal Capacitance: Requires only a 1.0 µF output capacitor for stability.
Applications
The LP2950ACDT-5.0G is well-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
- Devices requiring low dropout voltage regulation and tight line and load regulation
Q & A
- What is the output voltage tolerance of the LP2950ACDT-5.0G at 25°C?
The output voltage tolerance is ±0.5% at 25°C.
- What is the quiescent bias current of the LP2950ACDT-5.0G?
The quiescent bias current is 75 µA.
- What is the maximum dropout voltage at 100 mA output current?
The maximum dropout voltage is 450 mV at 100 mA output current.
- What is the operating ambient temperature range of the LP2950ACDT-5.0G?
The operating ambient temperature range is -40°C to +125°C.
- Does the LP2950ACDT-5.0G have internal current and thermal limiting protection?
- What type of capacitor is recommended for stability?
A 1.0 µF (or greater) capacitance between the output terminal and ground is recommended. Solid tantalums or multilayer ceramic capacitors are suitable.
- Can the output voltage of the LP2950ACDT-5.0G be programmed?
No, the LP2950ACDT-5.0G has a fixed output voltage. However, the LP2951 version can be programmed from 1.25 V to 29 V.
- What is the thermal resistance, junction-to-ambient, of the LP2950ACDT-5.0G?
The thermal resistance, junction-to-ambient, is 105 °C/W.
- Does the LP2950ACDT-5.0G have a shutdown input feature?
No, the shutdown input feature is available in the LP2951 version, not the LP2950ACDT-5.0G.
- What is the error output feature in the LP2951 version?
The error output feature signals external circuitry of an out-of-regulation condition or serves as a microprocessor power-on reset.
