L4931ABDT80-TR

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

The L4931ABDT80-TR is a very low dropout voltage regulator from STMicroelectronics, featuring a fixed 8.0 V output and a maximum continuous output current of 250 mA. It operates with an input voltage range up to 20 V and maintains a typical dropout voltage of 0.4 V at full load. The device incorporates TTL-compatible shutdown logic control for power management and requires only a 2.2 µF capacitor for stability. It offers high supply voltage rejection of 70 dB (typical) and includes internal current and thermal limiting protections. The component functions reliably across an extended temperature range from -40 °C to +125 °C.

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

• Very low dropout voltage capability ensures efficient regulation in battery-powered systems
• TTL compatible shutdown logic allows precise board-level standby mode control
• Minimal external capacitance requirement reduces space and cost
• Integrated current and thermal limiting protects against overload conditions

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

• Battery-powered portable electronic devices
• Low noise linear power regulation circuits
• Local regulators requiring standby mode functionality
• General purpose low dropout voltage regulation

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

Verify the specific suffix DT80 corresponds to the 8.0 V fixed output variant when sourcing. Confirm package type matches design requirements as the family supports multiple form factors. Check manufacturer documentation for current status as some variants may be discontinued. Ensure compatibility with required output tolerance specifications before finalizing procurement.

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

Select this component for applications requiring stable 8.0 V regulation with minimal voltage drop. Consider the 250 mA output limit when sizing for load requirements. Evaluate the need for shutdown logic if power conservation is critical. Verify that the SO-8 or DPAK package fits the available PCB real estate constraints.

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

This part belongs to the L4931 family of very low dropout regulators designed for low power and low noise applications. The series provides various fixed output voltages and packaging options including SO-8, DPAK, TO-92, and PPAK. The AB suffix indicates a tighter output voltage tolerance compared to standard C grade variants.

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

Consult official substitution lists for equivalent LDO regulators with matching 8.0 V output and 250 mA current capacity. Verify pinout compatibility if replacing in existing designs.