Overview
The L4931CD33-TR is a very low drop voltage regulator produced by STMicroelectronics. It is available in the SO-8 package and is part of a wide range of output voltages, including 3.3V, 3.5V, and 5V. This regulator is particularly suited for low noise, low power applications, especially in battery-powered systems. The very low dropout voltage (0.4 V) and the very low quiescent current make it an ideal choice for applications requiring minimal power consumption.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage (nom) | 3.3 | V |
| Output Tolerance (typ) | ±1% (AB) or ±2% (C) at 25 °C | % |
| Output Current (nom) | 0.25 A (250 mA) | A |
| Dropout Voltage | 0.4 V (typ), 0.6 V (max) | V |
| Quiescent Current | 50 µA (OFF mode), 600 µA (ON mode) | µA |
| Operating Input Voltage | Up to 20 V | V |
| Operating Temperature Range | -40 to 125 °C | °C |
| Supply Voltage Rejection | 70 dB (typ) for 5 V version | 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 typ. for 5 V version)
- Wide operating temperature range (-40 to 125 °C)
Applications
The L4931CD33-TR is suitable for a variety of applications, including:
- Low noise, low power systems
- Battery-powered devices
- Industrial automation
- Consumer electronics requiring low power consumption
- Automotive systems (specific models like L4931CD33-TRY)
Q & A
- What is the typical dropout voltage of the L4931CD33-TR?
The typical dropout voltage is 0.4 V.
- What is the maximum output current of the L4931CD33-TR?
The maximum output current is 250 mA.
- What is the operating temperature range of the L4931CD33-TR?
The operating temperature range is from -40 to 125 °C.
- What type of shutdown control does the L4931CD33-TR have?
The L4931CD33-TR has logic controlled electronic shutdown.
- What is the quiescent current in OFF mode for the L4931CD33-TR?
The quiescent current in OFF mode is typically 50 µA.
- What is the supply voltage rejection for the 5 V version of the L4931CD33-TR?
The supply voltage rejection for the 5 V version is typically 70 dB.
- What package types are available for the L4931 series?
The L4931 series is available in SO-8, DPAK, and TO-92 packages.
- What is the output voltage tolerance for the L4931CD33-TR?
The output voltage tolerance is ±1% (AB) or ±2% (C) at 25 °C.
- How much capacitance is required for stability?
Only 2.2 µF capacitor is required for stability.
- Is the L4931CD33-TR RoHS compliant?
