LM22677QTJE-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM22677QTJE-ADJ/NOPB is a Texas Instruments SIMPLE SWITCHER® step-down DC/DC switching regulator. It operates with an input voltage range of 4.5 V to 42 V and delivers up to 5 A output current. The adjustable output voltage spans from 1.285 V to 37 V. Key electrical parameters include a typical quiescent current of 3.4 mA, a switching frequency of 500 kHz, and a maximum duty cycle of 90%. The device supports frequency synchronization and includes overcurrent protection. It functions within an operating temperature range of -40°C to +125°C and utilizes a TO-263-7 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-side switch enables compact design with minimal external components
• Frequency synchronization capability allows multiple regulators to operate in phase or out of phase
• Built-in thermal shutdown and cycle-by-cycle current limiting protect against overload conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial point-of-load regulation
• Automotive electronics systems
• Distributed power architectures

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'QTJE' indicates automotive qualification (AEC-Q100) and extended temperature rating as per official datasheets. Confirm the 'ADJ' designation matches the required adjustable output configuration. Ensure the 'NOPB' suffix denotes lead-free and RoHS compliance. Cross-reference the manufacturer part number directly with the latest TI documentation to validate pinout and thermal pad specifications before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when an input voltage up to 42 V and continuous output current of 5 A are required. The adjustable output feature provides flexibility for various load requirements. Consider the TO-263-7 package for adequate thermal dissipation in high-current applications. Verify that the 500 kHz switching frequency aligns with EMI constraints and inductor size requirements. Ensure the system environment meets the -40°C to +125°C operating temperature range.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2267x family of SIMPLE SWITCHER regulators, which are designed for high-efficiency step-down conversion. The family shares common control architecture but varies in output current capabilities and package options. The LM22677 specifically targets higher current applications compared to lower-rated siblings like the LM22671 or LM22674.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes within the same family include LM22677TJE-ADJ/NOPB (non-automotive grade) or LM22677MRX-ADJ/NOPB (different package). For automotive applications, verify if LM22677Q-ADJ variants are available. Always check pin compatibility and thermal performance when substituting.