Overview
The L4931CD50 is a very low drop voltage regulator produced by STMicroelectronics. This regulator is part of the L4931 series, which is known for its low dropout voltage and low quiescent current, making it particularly suitable for low noise, low power applications, especially in battery-powered systems. The L4931CD50 is available in an SO-8 package and offers a fixed output voltage of 5V with an output current up to 250 mA.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Type of Integrated Circuit | Voltage Regulator (LDO, Linear, Fixed) |
| Output Voltage | 5V |
| Output Current | 0.25 A (250 mA) |
| Voltage Drop | 0.4 V |
| Input Voltage Range | 4 V to 20 V |
| Operating Temperature Range | -40°C to 125°C |
| Output Tolerance | ±2% (typical) |
| Package Type | SO-8 |
| Mounting Type | SMD |
| Quiescent Current | Typ. 50 µA in OFF mode, 600 µA in ON mode |
Key Features
- Very low dropout voltage (0.4 V)
- Very low quiescent current (typ. 50 µA in OFF mode, 600 µA in ON mode)
- Logic controlled electronic shutdown (available in PPAK and SO-8 packages)
- Internal current and thermal limit
- Only 2.2 µF capacitor required for stability
- High supply voltage rejection (70 dB typ. for 5 V version)
- Available in ± 1 % (AB) or 2 % (C) selection at 25 °C
Applications
The L4931CD50 is suitable for a variety of applications, including:
- Battery-powered systems due to its low power consumption and low noise characteristics.
- Industrial applications requiring stable and efficient voltage regulation.
- Local voltage regulation on PCBs where space and cost savings are critical.
- Systems requiring low dropout voltage and high supply voltage rejection.
Q & A
- What is the output voltage of the L4931CD50?
The output voltage of the L4931CD50 is 5V.
- What is the maximum output current of the L4931CD50?
The maximum output current of the L4931CD50 is 250 mA.
- What is the typical quiescent current of the L4931CD50 in ON mode?
The typical quiescent current in ON mode is 600 µA.
- What is the operating temperature range of the L4931CD50?
The operating temperature range is from -40°C to 125°C.
- What package types are available for the L4931 series?
The L4931 series is available in SO-8, DPAK, and TO-92 packages.
- Does the L4931CD50 have a shutdown feature?
- What is the input voltage range for the L4931CD50?
The input voltage range is from 4 V to 20 V.
- What is the typical output tolerance of the L4931CD50?
The typical output tolerance is ±2%.
- How much capacitor is required for stability?
Only a 2.2 µF capacitor is required for stability.
- What are some common applications for the L4931CD50?
Common applications include battery-powered systems, industrial applications, and local voltage regulation on PCBs.
