LT3437IDD#PBF

Overview

The LT3437IDD#PBF is a monolithic buck switching regulator manufactured by Analog Devices Inc., housed in a 10-lead DFN package. It operates with an input voltage range of 3.3 V to 60 V and delivers up to 400 mA output current. The device features an adjustable output voltage, a fixed 200 kHz switching frequency, and supports shutdown functionality. It functions within a temperature range of -40°C to +125°C, drawing 75 µA during operation and 1.35 mA quiescent current.

Feature Summary

• Integrates a high-voltage capable power switch for direct connection to industrial or automotive bus lines.
• Provides synchronous rectification to maximize conversion efficiency across varying load conditions.
• Includes internal compensation and soft-start circuitry to simplify external component requirements.

Applications

• Industrial control systems requiring isolated or non-isolated DC-DC conversion.
• Automotive electronics operating on 12V or 24V nominal bus architectures.
• Point-of-load regulation for microprocessors and field-programmable gate arrays.

Procurement Notes

Verify the specific suffix 'IDD' against the official datasheet to confirm the thermal pad configuration and lead finish specifications. Ensure the procurement channel provides traceability documentation compliant with RoHS directives. Cross-reference the manufacturer part number directly with Analog Devices to avoid counterfeit components, as distributor listings may vary in packaging format descriptions.

Selection Notes

Select this component when a wide input voltage range extending to 60 V is required alongside moderate output current capabilities. The fixed 200 kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the DFN package size constraints and thermal dissipation requirements relative to the expected ambient temperature and load profile.

Part Context

This part belongs to the LT3437 family of high-voltage buck regulators designed for robust performance in electrically noisy environments. It serves as a compact solution for stepping down higher voltages to lower logic or analog supply rails without requiring external Schottky diodes due to its synchronous architecture.

Replacement Considerations

LT3437EDD#PBF