BD9E300EFJ-EVK-001: 5V @ 2.5A, 7.2 ~ 33V in


BD9E300EFJ-EVK-001 Evaluation board delivers an output 5.0 volts from an input 7.2 to 33 volts using BD9E300EFJ, a synchronous rectification step-down DC/DC converter integrated circuit, with output current rating of maximum 2.5A. The output voltage can be set by changing the external parts of circuit and the loop-response characteristics also can be adjusted by the phase compensation circuit.

BD9E300EFJ-LB is a synchronous buck switching regulator with built-in power MOSFETs. It is capable of an output current of up to 2.5A. It has a high oscillation frequency of 1MHz while using small inductance value. It is a current mode control DC/DC converter and features high-speed transient response. Phase compensation can also be set easily.

For other variants please see the BD9E30x family of reference designs and ICs available from Rohm Semiconductor and Digi-Key Electronics.


Manufacturer Rohm Semiconductor
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number BD9E300EFJ-EVK-001-ND
Eval Board Supplier Rohm Semiconductor
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 5 V
Current Out 2.5 A
Voltage In 7.2 ~ 33 V
Efficiency @ Conditions >90%, 12V in, 5V @ 0.4 ~ 1.25 A
>80%, 24V in, 5V @ 0.25 ~ 2.5 A
Voltage Out Range - Fixed
Features Over Current Protection
Over Voltage Protection
Short Circuit Protection
Soft Start
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 1 MHz
Standby Current [Typical] 0 µA
Quiescent Current [Typical] 1.5 mA
Component Count + Extras 12 + 6
Internal Switch Yes
Design Author Rohm
Application / Target Market Distributed Power Systems
Power: Industrial Power
White Goods
Standby Current [Maximum] 10 µA
Quiescent Current [Maximum] 2.5 mA
Main I.C. Base Part BD9E300EFJ
Date Created By Author 2014-12
Date Added To Library 2019-10

Eval Board

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Quantity Available: 4