L4995AJ

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

The L4995AJ is a monolithic integrated low-drop voltage regulator from the STMicroelectronics L4995 family, designed for automotive applications. It provides a fixed 5 V output with a maximum current of 500 mA. The device utilizes a p-channel MOSFET regulating element to maintain regulation despite input voltage transients up to 40 V. Key electrical specifications include an operating DC supply voltage range of 5.6 V to 31 V and a low quiescent current consumption of 3 uA. The output voltage accuracy is specified at 2%. The component features a dropout voltage of 500 mV at 400 mA, with line and load regulation both rated at 25 mV. It operates within a junction temperature range of -40 °C to +150 °C.

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

• Integrates watchdog, enable, and externally programmable reset circuits for flexible system control
• Features thermal shutdown and short circuit protection mechanisms
• Includes an enable input for active enabling or disabling of the voltage regulator
• Supports programmable reset pulse delay and watchdog timer via external capacitors

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

• Supplying microprocessor systems in automotive environments
• Automotive electronic modules requiring AEC-Q100 qualified components
• Systems needing integrated reset and watchdog functionality

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

Verify the specific suffix (e.g., JTR) against the required package type, as the base part number covers multiple variants. Confirm RoHS compliance status through official documentation. Ensure the selected variant matches the necessary pin configuration for the target PCB layout. Cross-reference the datasheet revision date to ensure compatibility with current design standards.

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

Select this component when a fixed 5 V output is required for automotive-grade microprocessor power supplies. The L4995AJ variant specifically includes both externally programmable reset and enable functions. Consider the wide input voltage range and high junction temperature capability for harsh automotive environments. Evaluate the need for integrated safety features like watchdog timers to simplify system architecture.

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

The L4995 belongs to a family of monolithic integrated voltage regulators available in 12-pin and 24-pin packages. This family is distinguished by its ability to handle input voltage transients up to 40 V while maintaining low dropout performance. The devices are pre-trimmed for high precision and are fully qualified under the AEC-Q100 standard for automotive reliability.

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

Public confirmed substitute part numbers are not provided in the source material.