L4931CZ25

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The L4931CZ25 is a very low drop voltage regulator available in SO-8, DPAK, and TO-92 packages. It features a dropout voltage of 0.4 V and a quiescent current of 600 µA in ON mode and 50 µA in OFF mode. The device provides an output current up to 250 mA with fixed output voltages including 3.3 V, 3.5 V, and 5 V. It requires only a 2.2 µF capacitor for stability and includes internal current and thermal limits. The supply voltage rejection is typically 70 dB for the 5 V version. The operating temperature range extends from -40 to 125 °C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Very low dropout voltage of 0.4 V suitable for battery-powered systems
• Logic controlled electronic shutdown function in PPAK and SO-8 packages
• Requires only a 2.2 µF capacitor for stability

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Low noise, low power applications
• Battery-powered systems
• Local regulators requiring standby mode

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific package type (SO-8, DPAK, or TO-92) and output voltage selection (AB for ±1% or C for 2%) against the datasheet specifications. Confirm that the inhibit control feature is required if using SO-8 or PPAK packages, as this functionality is not available in all package variants. Ensure the application environment stays within the specified -40 to 125 °C temperature range.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select the L4931CZ25 when a very low dropout voltage and low quiescent current are critical for system efficiency. The device is particularly suitable for applications where space savings are achieved by using a small 2.2 µF output capacitor. Consider the logic-controlled shutdown feature if board-level power management is required.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

The L4931 belongs to a family of very low drop voltage regulators designed for low noise and low power applications. It is often used in battery-powered systems where minimizing power consumption is essential. The inclusion of a TTL-compatible shutdown logic control allows for efficient power management in local regulator configurations.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Check for direct substitutes such as the LM2931, which offers similar low dropout characteristics but may have different current ratings and automotive qualifications. Verify pin compatibility and electrical parameters before substitution.