Overview
The L4931ABD50-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, due to its very low dropout voltage (0.4 V) and low quiescent current. The device also features a TTL compatible shutdown logic control, which allows for part of the board to be put in standby mode, reducing total power consumption.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage (nom) | 5 | V |
| Output Tolerance (typ) | ±1% | |
| Output Current (nom) | 250 mA | |
| Dropout Voltage | 0.4 V | |
| Quiescent Current (ON mode) | 600 µA | |
| Quiescent Current (OFF mode) | 50 µA | |
| Operating Input Voltage | Up to 20 V | |
| Operating Temperature Range | -40 to 125 °C | |
| Package | SO-8 | |
| Supply Voltage Rejection (typ) | 70 dB for 5 V version |
Key Features
- Very low dropout voltage (0.4 V)
- Very low quiescent current
- Logic controlled electronic shutdown
- Internal current and thermal limit
- Only 2.2 µF capacitor required for stability
- Available in ± 1 % (AB) or 2 % (C) selection at 25 °C
- Supply voltage rejection: 70 dB typ. for 5 V version
- Temperature range: from -40 to 125 °C
Applications
The L4931ABD50-TR is suitable for a variety of applications, including:
- Low noise, low power systems
- Battery-powered devices
- Industrial and automotive systems requiring stable voltage regulation
- Local voltage regulation on boards where power consumption needs to be minimized
Q & A
- What is the typical dropout voltage of the L4931ABD50-TR?
The typical dropout voltage is 0.4 V.
- What is the maximum output current of the L4931ABD50-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 operating temperature range of the L4931ABD50-TR?
The operating temperature range is from -40 to 125 °C.
- Does the L4931ABD50-TR have a shutdown feature?
- 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 supply voltage rejection for the 5 V version?
The supply voltage rejection is typically 70 dB for the 5 V version.
- What package types are available for the L4931 series?
The available packages are SO-8, DPAK, and TO-92.
- How much capacitance is required for stability?
Only 2.2 µF capacitor is required for stability.
- Is the L4931ABD50-TR RoHS compliant?
