L9777C13TR

Overview

The L9777C13TR is a monolithic integrated low-drop voltage regulator from STMicroelectronics, housed in a PowerSSO-12 package. It provides an adjustable positive output voltage with a maximum current capability of 600 mA. The device operates within a DC supply voltage range of 5.6 V to 31 V and features high precision output regulation with a typical accuracy of 2%. Designed for automotive applications, it includes comprehensive protection mechanisms such as over-temperature shutdown, short-circuit proofing, and overload protection.

Feature Summary

• Integrated reset circuit with double reset function and adjustable threshold sensing down to 1 V
• VDD tracking regulator switchable via the VDD_EN pin for power management control
• External capacitor configurable for setting NMI/reset power-up delay and watchdog frequency
• Robust protection against over temperature, short circuit, and overload conditions

Applications

• Automotive microprocessor systems under severe operating conditions
• Low-power voltage regulation requiring precise output stability
• Systems necessitating integrated reset and watchdog timer functions

Procurement Notes

Verify the specific suffix C13TR confirms the PowerSSO-12 package and 600 mA rating, as generic L9777 listings may indicate lower current variants or obsolete status. Confirm RoHS compliance and check for NRND (Not Recommended for New Designs) status on official distributor channels before finalizing procurement plans.

Selection Notes

Select this component when a single IC solution is required for both voltage regulation and system reset monitoring in automotive environments. Ensure the input voltage remains within the 5.6 V to 31 V range and that thermal dissipation requirements for 600 mA operation are met through adequate PCB layout or heat sinking strategies.

Part Context

This part belongs to the L9777 family of low-power regulators designed specifically for automotive electronics. Unlike standard linear regulators, this series integrates additional logic functions such as reset generation and watchdog timers, reducing the component count and board space required for complex microprocessor power management systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing reset thresholds and current capabilities if considering alternative manufacturers.