L4931CD33-TRY

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

The L4931CD33-TRY is a very low dropout voltage regulator manufactured by STMicroelectronics, featuring a fixed 3.3 V output and a maximum continuous output current of 250 mA. It operates with a maximum input voltage of 20 V and maintains a typical dropout voltage of 0.4 V at full load. The device incorporates logic-controlled electronic shutdown, drawing approximately 600 µA in the ON state and 50 µA in the OFF state. It ensures stability with only a 2.2 µF output capacitor and includes internal thermal and current limiting protections. The component is housed in an SOT-223 (PPAK) surface-mount package and supports an operating temperature range from -40 °C to +125 °C.

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

• Very low dropout voltage capability suitable for battery-powered systems
• Logic-controlled electronic shutdown function for power management
• Requires minimal external capacitance for circuit stability
• Integrated thermal and current limiting protection mechanisms

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

• Battery-powered portable electronic devices
• Low noise linear regulation circuits
• Local voltage regulation in standby mode systems
• Low power consumer electronics applications

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

Verify the specific suffix 'TRY' against the official STMicroelectronics datasheet to confirm the PPAK/SOT-223 package type and tape-and-reel delivery format. Ensure the fixed 3.3 V output specification matches the design requirements. Confirm RoHS compliance status and check for any end-of-life notices or alternative recommendations provided by the manufacturer for this specific part number variant.

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

Select this component when a compact surface-mount solution is required for low-power regulation. The PPAK package offers space savings compared to through-hole options. The logic inhibit feature allows for system-wide power reduction. Verify that the 250 mA output current meets the load demands and that the 20 V input voltage range accommodates the source supply variations without exceeding absolute maximum ratings.

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

The L4931 series comprises very low dropout regulators available in multiple packages including SO-8, DPAK, TO-92, and PPAK. The CD33 designation indicates a fixed 3.3 V output with 2% accuracy. The TRY suffix typically denotes the PPAK surface-mount package and reel packaging. This series is designed for efficiency in low-power applications where minimizing quiescent current and dropout voltage is critical for extending battery life.

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

Direct substitutes within the same family include L4931CD33 and L4931CD33-TR, which share identical electrical characteristics but may differ in package style or standard tube packaging versus tape-and-reel. Verify pinout compatibility and thermal performance when substituting between different package types such as SO-8 or DPAK variants.