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© 2017 ROHM Co., Ltd.
No. 60AP001E Rev.001
2017.4
© 2014 ROHM Co., Ltd.
No. 60UG012E Rev.003
APR.2017
User
’s Guide
Switching Regulator Series
Step-Down DC/DC Converter
BD9E101FJ-LB Evaluation Board
BD9E101FJ-EVK-001
BD9E101FJ-EVK-001 Evaluation board delivers an output 5.0 volts from an input 7.2 to 36 volts using BD9E101FJ-LB, a synchronous rectification
step-down DC/DC converter integrated circuit, with output current rating of maximum 1A. 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=12kΩ, R2=3kΩ
Output Voltage Setting Range
V
IN
×0.0855
V
IN
×0.7
V
Output Current Range
0
1
A
Loop Band Width
31.6
kHz
Phase Margin
77.1
degrees
Input Ripple Voltage
90
mVpp
I
O
= 1A
Output Ripple Voltage
60
mVpp
I
O
= 1A
Output Rising Time
3
ms
Operating Frequency
570
kHz
Maximum Efficiency
85.4
%
I
O
= 0.85A
(NOTE1) When the output voltage is 5.0V, it is 7.2V by limiting ratio of the maximum duty.
(NOTE2) However, (V
IN
×0.
0855) ≥ 1.0V
(NOTE2)
(NOTE1)
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