Design contains obsolete parts

BD9328EFJ_EVK: 3.3V @ 2A, 4.2 ~ 18V in


This evaluation board has been developed for ROHM’s step-down switching regulator customers evaluating BD9328EFJ. While accepting a wide power supply of 4.2 - 18V, a step down output of 3.3V or any external resistor defined voltage can be produced.

The ICs have two integrated low resistance N-channel MOSFETs and a fixed synchronization frequency of 380 kHz. A Soft Start circuit prevents in-rush current during startup along with UVLO (low voltage error prevention circuit) and TSD (thermal shutdown detection) protection circuits. An EN pin allows for simple ON/OFF control of the IC to reduce standby current consumption.


Manufacturer Rohm Semiconductor
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number BD9328EFJ_EVK-ND
Eval Board Supplier Rohm Semiconductor
Eval Board Board not Stocked
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 3.3 V
Current Out 2 A
Voltage In 4.2 ~ 18 V
Efficiency @ Conditions >90%, 12V in, 3.3V @ 0.25 ~ 1.7 A
Voltage Out Range
Features Electrolytic Free
Over Current Protection
Shutdown, Enable, Standby
Soft Start
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 380 kHz
Standby Current [Typical] 15 µA
Quiescent Current [Typical] 1.2 mA
Component Count + Extras 11 + 5
Internal Switch Yes
Design Author Rohm
Application / Target Market Point of Load (PoL)
Standby Current [Maximum] 27 µA
Quiescent Current [Maximum] 3 mA
Main I.C. Base Part BD9328
Date Created By Author
Date Added To Library 2017-05

Eval Board


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