Rohm BD9G101G Application Note

ROHM Switching Regulator Solutions
Evaluation Board:
Step-down Switching Regulator
With Built-in Power MOSFET
BD9G101G (5V | 0.5A Output)
●Introduction
This application note will provide the steps necessary to operate and evaluate ROHM's step-down switching regulator using the BD9G101G
evaluation boards. Board layout recommendations, operation procedures, application data and build of materials are provided.
●Description
This evaluation board has been developed for ROHM's step-down switching regulator customers evaluating BD9G101G. While accepting a
wide power supply of 6-42V, a step down output of 1V-29V can be produced. The IC has an internal 800mohm Nch MOSFET (1A max) and
a fixed operating frequency range of 1.5MHz. A Soft Start circuit prevents in-rush current during startup along with UVLO (low voltage error
prevention circuit), OCP (over-current protection) and TSD (thermal shutdown detection) protection circuits. An EN pin allows for simple
ON/OFF control of the IC to reduce standby current consumption.
●Applications
Industrial distributed power applications
Automotive and battery powered equipment
●Evaluation Board Operating Limits and Absolute Maximum Ratings
Parameter
Supply Voltage
BD9G1010G
Output Voltage / Current
BD9G101G
BD9G101G
●Evaluation Board
Below is the evaluation board with the BD9G101G. Component selection and board layout guidelines are provided in the
BD9G101G datasheet.
Vout
GND
BD9673EFJ Eval Board
EN
BD9G101G Eval Board (Front)
Limit
Symbol
MIN TYP
VCC 6
VOUT -
IOUT - 0.5
VOUT
GND
VCC
ENABLE
H: Active
(ICOFF)
L: Inactive
(ICON)
Unit
MAX
- 42 V
5 - V
- A
BD9G101G Eval Board (Back)
No.0000000015
Conditions
*Set by R1 and R2
1