LT3688IFE#TRPBF

Overview

The LT3688IFE#TRPBF is a dual synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.8 V to 36 V and provides two independent adjustable outputs, each capable of delivering up to 800 mA. The device integrates a fixed 2.2 MHz switching frequency to minimize external component size while maintaining high efficiency. It features a low quiescent current of 65 uA during operation and includes a power-on reset generator with programmable delay. The IC is housed in a thermally enhanced TSSOP-EP-24 package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Dual-channel synchronous buck topology for independent output regulation
• Integrated power-on reset generator with programmable delay
• Fixed high-frequency switching for compact passive design
• Low quiescent current operation for improved light-load efficiency

Applications

• Portable electronics requiring multiple regulated rails
• Industrial control systems with wide input voltage ranges
• Communication equipment power distribution networks
• Battery-powered devices needing efficient step-down conversion

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm tape-and-reel packaging configuration. Ensure the part number matches the required thermal pad variant for proper heat dissipation. Cross-reference the datasheet revision date to validate electrical characteristics and pinout compatibility before integration into production designs.

Selection Notes

Select this component when dual isolated or non-isolated outputs are required from a single wide-voltage source. The fixed 2.2 MHz frequency reduces inductor size compared to lower-frequency alternatives. Consider the thermal performance of the TSSOP-EP package relative to the expected load current and ambient conditions to ensure reliable operation within the specified temperature range.

Part Context

This part belongs to the LT3688 family of dual synchronous buck regulators designed for space-constrained applications. It shares architectural similarities with other high-density power management ICs from Analog Devices but distinguishes itself through its integrated reset functionality and wide input voltage capability suitable for industrial and mobile environments.

Replacement Considerations

LT3688IUF#PBF: Different package type (QFN vs TSSOP) with similar electrical specifications.