LT3688HFE#TRPBF

Overview

The LT3688HFE#TRPBF is a dual-channel 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 withstands transients up to 60 V. Each channel delivers an output current of 800 mA, supporting adjustable output voltages up to 32.4 V. The device features a fixed switching frequency of 2.2 MHz and maintains a low quiescent current of 65 uA. It integrates two power-on reset timers and a watchdog timer for system protection. The component is housed in a TSSOP-EP-24 package and supports operation temperatures from -40°C to +150°C.

Feature Summary

• Dual-channel synchronous buck topology providing independent adjustable outputs
• Integrated power-on reset generators and watchdog timer for enhanced reliability
• High transient voltage tolerance up to 60 V on the input supply
• Low quiescent current consumption during active operation

Applications

• Industrial control systems requiring robust power management
• Automotive electronics operating within wide input voltage ranges
• Communication infrastructure equipment needing reliable reset timing
• Portable devices utilizing single-cell lithium-ion battery inputs

Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the HFE variant corresponds to the specified temperature grade and package type required for your design. Ensure compatibility with the intended switching frequency and reset timing configurations before finalizing procurement orders.

Selection Notes

Select this regulator for applications requiring dual isolated or non-isolated outputs from a single high-voltage source. Consider the 2.2 MHz frequency for smaller passive component sizes compared to lower-frequency alternatives. Evaluate the thermal performance requirements given the 800 mA per channel capability and the available package options.

Part Context

This component belongs to the LT3688 family of dual synchronous step-down regulators designed for high-efficiency power conversion. It complements other Analog Devices PMIC solutions by offering integrated safety features like watchdogs and resets. The series targets markets demanding compact, reliable power supplies with minimal external component counts.

Replacement Considerations

LT3688IUF#PBF offers similar electrical characteristics but utilizes a 24-WFQFN package instead of TSSOP-EP-24.