LT8602IUJ#PBF

Overview

The LT8602IUJ#PBF is a quad-channel, current-mode, monolithic buck switching regulator manufactured by Analog Devices. It features two high-voltage synchronous buck regulators with an input range of 3 V to 42 V and output currents up to 1.5 A (OUT1) and 2.5 A (OUT2). Two low-voltage channels operate from 2.6 V to 5.5 V with output currents up to 1.8 A. The device utilizes a single oscillator with an adjustable switching frequency from 250 kHz to 2.2 MHz. Quiescent current is 30 μA in micropower Burst Mode operation. It includes programmable power-on reset, cycle-by-cycle current limit, thermal shutdown, and a 2-phase clock to reduce input ripple.

Feature Summary

• Quad-channel architecture integrating two high-voltage and two low-voltage synchronous buck regulators
• Micropower Burst Mode operation enabling ultra-low quiescent current at light loads
• Integrated programmable power-on reset and power good indicators for system monitoring
• Two-phase clock configuration reducing input current ripple on both high and low voltage rails

Applications

• Automotive systems requiring wide input voltage ranges
• Distributed supply regulation in industrial controls
• Industrial power supplies needing multiple isolated or non-isolated rails

Procurement Notes

Verify the specific suffix IUJ against the datasheet to confirm package type and temperature grade. Confirm RoHS compliance status through official documentation. Check for limited availability or obsolescence notices directly from Analog Devices. Ensure ESD handling procedures are followed during procurement and storage. Validate that the ordering part number matches the required pinout and thermal characteristics.

Selection Notes

Select this component when four independent regulated outputs are required from a single IC. Choose the LT8602 for applications demanding high efficiency across varying load conditions. Consider the wide input voltage range for automotive or industrial bus architectures. Evaluate the need for programmable power-on reset functionality before finalizing the design. Compare thermal performance requirements against the QFN-40 package capabilities.

Part Context

The LT8602 belongs to the LT860x family of high-voltage synchronous step-down regulators. It shares architectural similarities with the LT8601 but offers additional channel integration. The device is designed for space-constrained applications requiring multiple power rails. It complements other Analog Devices PMIC solutions for complex power management tasks.

Replacement Considerations

LT8601EUJ#PBF: Offers three channels instead of four; verify channel count requirements.

FAQ

What is the maximum output current for the high-voltage channels?

The high-voltage channels support output currents up to 1.5 A for OUT1 and 2.5 A for OUT2.

How does the LT8602 reduce input ripple current?

It uses a 2-phase clock where channels 1 and 3 operate 180 degrees out of phase with channels 2 and 4.