L387A

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

The L387A is a positive fixed linear voltage regulator manufactured by STMicroelectronics, designed for applications requiring stable power delivery. It provides a fixed output voltage of 5V with a maximum continuous output current capability of 500mA. The device accepts an input voltage range up to a maximum of 26V and exhibits a maximum dropout voltage of 0.8V when operating at full load current. Key electrical specifications include a static current consumption of 15mA and a maximum supply current of 180mA. The component is housed in a Pentawatt-5 package featuring vertical, bent, and staggered leads, suitable for through-hole mounting. It operates reliably within a temperature range spanning from -40°C to 125°C.

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

• Integrates comprehensive protection mechanisms including overcurrent limiting and thermal shutdown to safeguard against operational faults.
• Incorporates a reset control feature to manage system states during power events or fault conditions.
• Utilizes Pentawatt-5 packaging to facilitate efficient heat dissipation for high-current linear regulation tasks.

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

• Power supply circuits for industrial equipment
• Embedded systems requiring stable 5V logic rails
• Consumer electronics power management modules

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

Verify component authenticity and datasheet alignment due to the part's discontinued status. Confirm that replacement strategies account for the specific Pentawatt-5 package dimensions and pinout configuration. Ensure that any substitute components meet the original thermal and electrical requirements for the intended application environment.

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

Select this regulator for designs necessitating a robust 5V fixed output with moderate current demands up to 500mA. Consider the 26V maximum input rating and 0.8V dropout characteristic for input voltage headroom calculations. Evaluate the thermal performance within the Pentawatt-5 package to ensure adequate heat sinking for sustained operation at higher ambient temperatures.

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

The L387A belongs to the L387 family of linear regulators produced by STMicroelectronics. It serves as a specialized variant offering fixed 5V regulation within the broader PMIC portfolio. The component represents a legacy solution for through-hole applications, characterized by its specific mechanical footprint and protection features tailored for reliable standalone voltage regulation.

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

Public confirmed substitute part numbers are not available in the provided documentation. Due to the discontinued status, engineers must evaluate alternative regulators based on matching pin compatibility, voltage/current ratings, and package dimensions.