BD90640EFJ-CE2

Overview

The BD90640EFJ-CE2 is a single-output step-down switching regulator manufactured by ROHM Semiconductor, housed in an HTSOP-J8 surface-mount package. It operates with an input voltage range of 3.5 V to 36 V and delivers a maximum output current of 4 A. The adjustable output voltage spans from 800 mV to 36 V. The device supports an external switching frequency setting between 50 kHz and 600 kHz and features a shutdown function. It is qualified under AEC-Q100 standards for automotive applications and functions within a temperature range of -40 °C to +125 °C.

Feature Summary

• Integrates a high-voltage P-channel POWER MOSFET to support wide input voltage ranges.
• Enables synchronization with external clock signals via the external synchronization input terminal.
• Provides over-current protection and low supply voltage error prevention mechanisms.

Applications

• Automotive electronic systems requiring robust power management
• Industrial control equipment operating under variable input conditions
• General-purpose DC-DC conversion in embedded systems

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm that the specific suffix matches the required packaging configuration. Check for any pending Product Change Notices (PCN) regarding specification updates. Ensure compatibility with existing thermal management designs given the operating temperature range. Validate AEC-Q100 qualification status if automotive functional safety compliance is mandatory for the target application.

Selection Notes

Select this component when a wide input voltage range up to 36 V is required alongside a 4 A output capability. Consider the HTSOP-J8 package for space-constrained printed circuit board layouts. Evaluate the need for external synchronization if noise immunity or frequency alignment with other system clocks is necessary. Verify that the adjustable output voltage range meets the specific load requirements without exceeding the maximum limits.

Part Context

This part belongs to ROHM's Buck topology switching regulator family designed for high-efficiency power conversion. It integrates the controller and power FETs into a single compact unit, reducing external component count. The series targets applications demanding reliability in harsh environments, supported by its automotive-grade qualification and wide operating temperature specifications.

Replacement Considerations

BD90640EFJ-C is listed as an alias for this component. Verify electrical characteristic equivalence before substitution. No other public substitute part numbers are confirmed in the provided documentation.