Overview
The L4931ABDT33 is a very low drop voltage regulator produced by STMicroelectronics. This regulator is part of the L4931 series, which is available in various packages including TO-252 (DPAK), SO-8, and TO-92. It is designed for low noise, low power applications, particularly in battery-powered systems. The regulator features a very low dropout voltage of 0.4 V and a low quiescent current, making it highly efficient for power management in various electronic devices.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Part Number | L4931ABDT33-TR |
| Package Type | TO-252-3 (DPAK) |
| Mounting Method | Surface Mount |
| Output Voltage (nom) | 3.3 V |
| Output Tolerance (typ) | ±1% |
| Maximum Output Current | 250 mA |
| Maximum Input Voltage | 20 V |
| Dropout Voltage (max) | 0.4 V |
| Quiescent Current | Typ. 50 µA in OFF mode, 600 µA in ON mode |
| Operating Temperature Range | -40°C to +125°C |
| Dimensions | 6.6 x 6.2 x 2.4 mm |
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
- Available in ± 1% (AB) or 2% (C) selection at 25°C
- Supply voltage rejection: 70 dB typ. for 5 V version
Applications
The L4931ABDT33 is suitable for a variety of applications, including low noise, low power systems and battery-powered devices. It is particularly useful in industrial and automotive environments due to its wide operating temperature range and high reliability. Other applications include consumer electronics, medical devices, and any system requiring efficient and stable voltage regulation.
Q & A
- What is the maximum output current of the L4931ABDT33? The maximum output current is 250 mA.
- What is the typical dropout voltage of the L4931ABDT33? The typical dropout voltage is 0.4 V.
- What are the available output voltages for the L4931 series? The available output voltages include 2.7 V, 3.3 V, 3.5 V, 5 V, 8 V, and 12 V.
- What is the quiescent current in OFF and ON modes? The quiescent current is typically 50 µA in OFF mode and 600 µA in ON mode.
- What is the operating temperature range of the L4931ABDT33? The operating temperature range is from -40°C to +125°C.
- Does the L4931ABDT33 have internal current and thermal limits? Yes, it has internal current and thermal limits.
- What type of shutdown control does the L4931ABDT33 have? It has logic-controlled electronic shutdown.
- How much capacitance is required for stability? Only 2.2 µF is required for stability.
- What is the supply voltage rejection for the 5 V version? The supply voltage rejection is typically 70 dB for the 5 V version.
- In what packages is the L4931 series available? The L4931 series is available in TO-252 (DPAK), SO-8, and TO-92 packages.
