L4949EPTR-E

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

The L4949EPTR-E is a monolithic integrated 5V low-dropout voltage regulator manufactured by STMicroelectronics. It operates within an input voltage range of 5 V to 28 V, with transient supply voltage support up to 40 V. The device provides a fixed positive output of 5 V ±1% with a maximum output current capability of 100 mA. Key electrical parameters include a quiescent current of 300 µA and a maximum dropout voltage of 0.5 V at full load. It features line regulation of 20 mV and load regulation of 30 mV. The component is housed in a 20-SOIC package and is qualified under AEC-Q100 standards for automotive applications.

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

• Integrates power-on reset circuitry that senses the output voltage with programmable pulse delay via an external capacitor.
• Includes a voltage sense comparator for monitoring input conditions alongside standard linear regulation functions.
• Provides comprehensive protection mechanisms including thermal shutdown and short-circuit current limiting.

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

• Supplying microcomputer-controlled systems in automotive environments
• Power management units requiring high-precision standby voltage
• Automotive electronic control modules needing AEC-Q100 compliance

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

Verify the specific suffix 'EPTR' confirms the 20-SOIC surface-mount packaging and tape-and-reel delivery format. Confirm AEC-Q100 qualification status if automotive reliability is required. Check RoHS compliance details against current environmental regulations. Ensure design-in compatibility with existing PCB footprints for SOIC-20 packages before finalizing procurement orders.

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

Select this component when a fixed 5V output with integrated supervisory functions is required. The 20-SOIC package offers higher pin count than the 8-pin variant, supporting additional sensing or reset features. Consider the 300 µA quiescent current for standby efficiency requirements. Verify that the 100 mA output current meets the load demands of the target microcomputer system.

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

This part belongs to the L4949Ex-E series of multifunction very low drop voltage regulators. It shares core specifications with the L4949ED-E but differs in package configuration. The EP variant utilizes a 20-SOIC footprint, distinguishing it from the ED variant which uses an SOIC-8 package. Both serve similar automotive and industrial power management roles.

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

The L4949EDTR-E serves as a functional alternative within the same family but utilizes an SOIC-8 package rather than the 20-SOIC form factor. Designers must account for significant pinout and physical dimension differences during substitution. No other direct cross-model replacements are confirmed in public documentation.