LTC3890IGN-1#TRPBF

DC DC Switching Controllers Overview

The LTC3890IGN-1#TRPBF is a dual synchronous step-down DC/DC controller from Analog Devices, designed for high-performance power management. It operates with an input voltage range of 4V to 60V and provides two independent output channels. The device supports switching frequencies between 105kHz and 835kHz, utilizing a constant frequency current mode architecture. It features a typical no-load quiescent current of 60µA in sleep mode and 14µA in shutdown. The output voltage is adjustable down to 800mV, supporting up to 24V outputs. Packaged in a 28-pin SSOP, it includes integrated soft-start, tracking, and power good indicators.

DC DC Switching Controllers Feature Summary

• Dual-channel synchronous buck control with out-of-phase operation to minimize input capacitor ESR noise
• OPTI-LOOP compensation for optimized transient response across varying output capacitance and ESR values
• Independent TRACK/SS pins enabling synchronized ramping of output voltages during startup sequences
• Current foldback protection mechanism to limit MOSFET heat dissipation during short-circuit conditions

DC DC Switching Controllers Applications

• Automotive always-on systems requiring wide input voltage tolerance
• Distributed DC power systems in industrial equipment
• Battery-operated digital devices prioritizing low quiescent current
• High-efficiency point-of-load regulation modules

DC DC Switching Controllers Procurement Notes

Verify the specific suffix IGN-1 against the official Analog Devices datasheet to confirm pinout compatibility and functional configuration. Ensure the SSOP-28 package matches the target PCB footprint. Confirm RoHS compliance status through the manufacturer's latest documentation. Check for any recent production changes or PCN notices affecting availability. Validate that the tape and reel packaging meets storage and handling requirements.

DC DC Switching Controllers Selection Notes

Select this component when dual isolated outputs are required within a 60V input constraint. Consider the 60µA sleep current for battery-sensitive applications. Evaluate the 105kHz to 835kHz frequency range against EMI constraints and passive component size requirements. Ensure the thermal performance of the SSOP package aligns with the expected power dissipation levels in the final design.

DC DC Switching Controllers Part Context

This part belongs to the LTC3890 family of PolyPhase controllers, offering dual-channel synchronization capabilities. It complements higher-voltage variants like the LTC7892 and lower-voltage single-channel models such as the LTC3809. The IGN-1 designation specifies the industrial temperature grade and SSOP packaging variant within the broader product line.

DC DC Switching Controllers Replacement Considerations

LTC3890EUH#PBF offers identical electrical functionality but utilizes a 32-QFN package instead of SSOP-28. Designers must verify footprint compatibility and thermal pad connections when substituting. No other direct pin-compatible replacements are documented in the provided source material.