Overview
The L4931ABDT33-TR is a very low drop voltage regulator produced by STMicroelectronics. It is available in DPAK packages and is part of the L4931 series, known for its low dropout voltage and low quiescent current. This regulator is particularly suitable for low noise, low power applications, especially in battery-powered systems. It features a TTL compatible shutdown logic control function, 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) | 3.3 | V |
| Output Tolerance (typ) | ±1% | |
| Output Current (nom) | 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 (typ) | 70 dB | dB |
| Package | DPAK | |
| Grade | Industrial | |
| RoHS Compliance Grade | Ecopack2 |
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 L4931ABDT33-TR is suitable for a variety of applications, including:
- Low noise, low power systems
- Battery-powered devices
- Industrial automation
- Automotive systems (for automotive-grade versions)
- Consumer electronics requiring low dropout voltage regulators
Q & A
- What is the typical dropout voltage of the L4931ABDT33-TR?
The typical dropout voltage is 0.4 V.
- What is the maximum output current of the L4931ABDT33-TR?
The maximum output current is 250 mA.
- What is the quiescent current in ON mode for the L4931ABDT33-TR?
The quiescent current in ON mode is typically 600 µA.
- What is the operating temperature range of the L4931ABDT33-TR?
The operating temperature range is from -40 to 125 °C.
- Does the L4931ABDT33-TR have a shutdown feature?
- What is the supply voltage rejection of the L4931ABDT33-TR?
The supply voltage rejection is typically 70 dB for the 5 V version.
- What package type is the L4931ABDT33-TR available in?
The L4931ABDT33-TR is available in a DPAK package.
- Is the L4931ABDT33-TR RoHS compliant?
- What is the output voltage tolerance of the L4931ABDT33-TR?
The output voltage tolerance is ±1% at 25 °C.
- How much capacitance is required for stability?
