BD9845FV-E2

DC DC Switching Controllers Overview

The BD9845FV-E2 is a single-channel step-down switching regulator controller manufactured by ROHM Semiconductor. It operates with an input voltage range of 3.6 V to 35 V and supports adjustable switching frequencies from 100 kHz to 1.5 MHz. The device provides a maximum output current of 1 A and delivers regulated output voltages between 29 V and 36 V. It features a low quiescent current of 1 uA and functions within an operating temperature range of -40°C to +85°C. The component is housed in a compact SSOP-B-14 surface-mount package, designed for efficient power management in space-constrained applications.

DC DC Switching Controllers Feature Summary

• Integrates a single-channel buck converter controller topology for external FET drive
• Supports wide input voltage ranges suitable for various power supply architectures
• Features adjustable switching frequency to optimize efficiency and component size
• Designed for small form factor implementations using compact SSOP-B-14 packaging

DC DC Switching Controllers Applications

• Portable electronic devices requiring compact power solutions
• Industrial control systems utilizing standard voltage rails
• Consumer electronics with limited board space constraints

DC DC Switching Controllers Procurement Notes

Verify the specific suffix E2 against the manufacturer's latest datasheet to confirm pinout compatibility and RoHS status. Confirm that the SSOP-B-14 package dimensions match your PCB footprint requirements. Ensure the design accounts for the absence of internal power FETs, as this is a controller requiring external components. Check for any end-of-life notifications or recommended new design alternatives if planning long-term production.

DC DC Switching Controllers Selection Notes

Select this component when a single-channel buck controller is required with a wide input voltage capability up to 35 V. It is suitable for designs where external FET selection allows for customized current handling beyond the 1 A nominal rating. Consider this part for applications needing flexible switching frequency adjustment between 100 kHz and 1.5 MHz to balance noise and efficiency. Verify that the system does not require integrated shutdown pins or power good signals, as these are not provided in this specific controller variant.

DC DC Switching Controllers Part Context

This component belongs to the BD9845FV series of switching regulators from ROHM Semiconductor. It is classified under PMIC - Power Management ICs and specifically falls within the Switching Voltage Regulators category. The device is distinct from integrated converters as it functions primarily as a controller, necessitating external power switches for operation.

DC DC Switching Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's official replacement guide for direct equivalents.