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© 2017 ROHM Co., Ltd.
No. 60AP001E Rev.001
2017.4
© 2016 ROHM Co., Ltd.
No. 60UG018E Rev.002
APR.2017
User
’s Guide
Switching Regulator Series
Step-Down DC/DC Converter
BD9E303EFJ-LB Evaluation Board
BD9E303EFJ-EVK-001
BD9E303EFJ-EVK-001 Evaluation board delivers an output 5.0 volts from an input 7.0 to 36 volts using BD9E303EFJ-LB, a synchronous rectification
step-down DC/DC converter integrated circuit, with output current rating of maximum 3A. 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.
Performance specification
These are representative values, and it is not a guaranteed against the characteristics.
V
IN
= 24V, V
OUT
= 5.0V, Unless otherwise specified.
Parameter
Min
Typ
Max
Units
Conditions
Input Voltage Range
7.0
36
V
Output Voltage
5.0
V
R1=30kΩ, R2=7.5kΩ
Output Voltage Setting Range
V
IN
×0.06
V
IN
×0.8
V
Output Current Range
0
3
A
Loop Band Width
18.2
kHz
Phase Margin
70.8
degrees
Input Ripple Voltage
300
mVpp
I
O
= 3A
Output Ripple Voltage
30
mVpp
I
O
= 3A
Output Rising Time
2.2
ms
Operating Frequency
300
kHz
Maximum Efficiency
91.1
%
I
O
= 1.2A
(NOTE1) However, (V
IN
×0.
06) ≥ 1.0V
(NOTE1)
