L4925

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

The L4925 is a monolithic integrated low-dropout voltage regulator providing a fixed 5V output with a maximum current capability of 500mA. It operates within an input voltage range of 6V to 28V and supports transient voltages up to 40V. The device features extremely low quiescent current and a dropout voltage of less than 0.6V. Integrated functions include a power-on reset circuit that senses the output voltage and a programmable reset pulse delay controlled by an external capacitor. Additional protections encompass thermal shutdown and short-circuit limiting.

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

• Integrated power-on reset circuit sensing the regulated output voltage
• Programmable reset pulse delay time using an external capacitor
• Very low dropout voltage performance for efficient power regulation
• Built-in thermal shutdown and short-circuit protection mechanisms

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

• Microcomputer controlled systems
• Automotive applications
• Power supply units requiring reset functionality

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

Verify component status as the L4925 is listed as Not Recommended for New Designs (NRND) or Obsolete in various sources. Confirm availability through authorized distributors or secondary markets if sourcing for production. Ensure compatibility with existing PCB layouts and design specifications before procurement, as replacement components may require design adjustments.

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

Select this component for designs requiring a fixed 5V rail with integrated system reset capabilities. It is suitable for automotive environments due to its wide operating temperature range and robust transient voltage handling. Consider the obsolete status when planning long-term product lifecycles. Verify package availability, typically SOIC-20, against board space constraints.

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

The L4925 belongs to STMicroelectronics' family of very low drop voltage regulators designed for microcomputer systems. It combines linear regulation with digital reset logic, simplifying power management architectures. This integration reduces external component count compared to separate regulator and reset IC solutions.

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 NRND/Obsolete status, engineering teams should evaluate alternative LDOs with integrated reset functions from current portfolios.