Overview
The L4931CD50-TR is a very low drop voltage regulator produced by STMicroelectronics. It is available in various packages, including SO-8, DPAK, and TO-92, and offers a range of output voltages. This regulator is particularly suited for low noise, low power applications, especially in battery-powered systems. The device features a very low dropout voltage of 0.4 V and a low quiescent current, making it ideal for applications where power efficiency is crucial.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage (nominal) | 5 | V |
| Output Tolerance (typical) | ±1% (AB) or ±2% (C) | % |
| Output Current (nominal) | 250 mA | mA |
| Dropout Voltage | 0.4 V | V |
| Quiescent Current (ON mode) | 600 µA | µA |
| Quiescent Current (OFF mode) | 50 µA | µA |
| Operating Temperature Range | -40 to 125 °C | °C |
| Supply Voltage Rejection (typical for 5 V version) | 70 dB at 1 kHz | dB |
| Package | SO-8 |
Key Features
- Very low dropout voltage (0.4 V)
- Very low quiescent current (typ. 50 µA in OFF mode, 600 µA in ON mode)
- Output current up to 250 mA
- Logic controlled electronic shutdown
- Internal current and thermal limit
- Only 2.2 µF capacitor required for stability
- High supply voltage rejection (70 dB typical for 5 V version)
- Wide operating temperature range (-40 to 125 °C)
Applications
The L4931CD50-TR is suitable for a variety of applications, including:
- Low noise, low power systems
- Battery-powered devices
- Industrial and automotive applications
- Local voltage regulation in larger systems to reduce power consumption
Q & A
- What is the typical dropout voltage of the L4931CD50-TR?
The typical dropout voltage is 0.4 V.
- What is the maximum output current of the L4931CD50-TR?
The maximum output current is 250 mA.
- What are the available output voltages for the L4931 series?
The available output voltages are 3.3 V, 3.5 V, and 5 V.
- What is the quiescent current in ON and OFF modes?
The quiescent current is typically 600 µA in ON mode and 50 µA in OFF mode.
- What is the operating temperature range of the L4931CD50-TR?
The operating temperature range is from -40 to 125 °C.
- Does the L4931CD50-TR have built-in current and thermal limits?
- How much capacitance is required for stability?
Only 2.2 µF capacitor is required for stability.
- What is the supply voltage rejection of the L4931CD50-TR?
The supply voltage rejection is typically 70 dB at 1 kHz for the 5 V version.
- In which packages is the L4931CD50-TR available?
The L4931CD50-TR is available in SO-8, DPAK, and TO-92 packages.
- Is the L4931CD50-TR suitable for automotive applications?
