Design contains obsolete parts

BD9E151NUX-EVK-101: 5V @ 1.2A, 6 ~ 28V in


The BD9E151NUX-EVK-101 evaluation board has been specifically developed to evaluate the BD9E151NUX non-synchronous buck DC/DC converter with integrated 80mΩ high-side MOSFET. Features include wide input (6.0 to 28.0V) and output (1.0V to 23.0V) voltage ranges and a fixed operating frequency of 600kHz. Multiple protection functions are also built in, including a fixed soft start circuit that prevents inrush current during startup, UVLO (Under Voltage Lock Out), TSD (Thermal Shutdown), OCP (Over Current Protection), and OVP (Over Voltage Protection). An EN pin allows for simple ON/OFF control to reduce standby current.

The BD9E151NUX is a 28V, 1.2A diode-rectification buck converter that integrated internal high-side 30V Power MOSFET. To increase efficiency at light loads, a pulse skipping is automatically activated. Furthermore, the 0µA shutdown supply current allows the device to be used in battery powered application. Current mode control with internal slope compensation simplifies the external component count while allowing the use of ceramic output capacitors.


Manufacturer Rohm Semiconductor
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number BD9E151NUX-EVK-101-ND
Eval Board Supplier Rohm Semiconductor
Eval Board -
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 5 V
Current Out 1.2 A
Voltage In 6 ~ 28 V
Efficiency @ Conditions >90%, 12V in, 5V @ 0.1 ~ 1.2 A
Voltage Out Range 1 ~ Vin x 0.7
Features Over Current Protection
Over Voltage Protection
Shutdown, Enable, Standby
Soft Start
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 600 kHz
Standby Current [Typical] 0 µA
Quiescent Current [Typical] 800 µA
Component Count + Extras 12 + 6
Internal Switch Yes
Design Author Rohm
Application / Target Market Distributed Power Systems
Industrial Power
Security IP Camera
Standby Current [Maximum] 10 µA
Quiescent Current [Maximum] 1.6 mA
Main I.C. Base Part BD9E151
Date Created By Author 2015-12
Date Added To Library 2019-10

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