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BR301

P1-P3P4-P6P7-P9P10-P10
4
SANKEN ELECTRIC CO., LTD.
BR301-DS, Rev. 1.0
3.3 V, 1 A Non-Isolated Step Down DC/DC Converter Module
BR301
September 11, 2012
Performance Characteristics
at V
O
= 3.3 V
V
IN
= 8 V, I
O
= 0 A V
IN
= 30 V, I
O
= 0 A
V
IN
= 8 V, I
O
= 1 A
V
O
(2 V/div)
V
O
(2 V/div)
V
O
(2 V/div)
V
O
(2 V/div)
V
SW
(5 V/div)
V
SW
(5 V/div)
V
SW
(5 V/div)
V
SW
(5 V/div)
V
IN
(2 V/div)
V
IN
(2 V/div)
V
IN
(10 V/div)
V
IN
(2 V/div)
I
L
(500 mA/div)
I
L
(500 mA/div)
I
L
(500 mA/div)
I
L
(500 mA/div)
V
IN
= 30 V, I
O
= 1 A
t = 1.00 s/div t = 2.00 s/div
t = 1.00 s/div t = 1.00 s/div
5
SANKEN ELECTRIC CO., LTD.
BR301-DS, Rev. 1.0
3.3 V, 1 A Non-Isolated Step Down DC/DC Converter Module
BR301
September 11, 2012
Performance Characteristics
Temperature Rise At V
IN
= 30 V, V
O
= 3.3 V, I
O
= 1 A
Measurement Points
Temperature
(°C)
Temperature
Rise (°C)
Inductor Top 68.5 41.2
Diode Top 71.5 44.2
Ceramic capacitor Top 58.7 31.4
IC Bottom 74.8 47.5
Input ceramic capacitor Bottom 64.2 36.9
Output ceramic capacitor Bottom 62.2 34.9
Ambient temperature 27.3
Regulation
Output
Efficiency
Derating Curve (Natural Cooling)
6
SANKEN ELECTRIC CO., LTD.
BR301-DS, Rev. 1.0
3.3 V, 1 A Non-Isolated Step Down DC/DC Converter Module
BR301
September 11, 2012
Typical Application
VIN VO
V
IN
8 to 30 V
C
IN
220 μF
C
O
Electrolytic 470 μF
or Ceramic 30 μF
1
32
4
GND
NC
Load
BR301
Typical application circuit example
• An input electrolytic capacitor, C
IN
, of approximately 220 F should be connected to the input
side of the BR301. If the input voltage is stable, it is not required.
• An output capacitor, C
O
, either electrolytic of approximately 470 F or ceramic of
approximately 30 F should be connected to the output side of the BR301.
• For C
IN
, a YXF type made by Rubycon for switching power supplies or equivalent is
recommended.
• For C
O
, either a low impedance ZL type made by Rubycon, or three ceramic capacitors
connected in parallel (GRM31CR71E106KA12 made by Murata), for switching power
supplies or equivalent are recommended.
• Depending on PCB layout, output voltage ripple could be amplified. Please check the output
voltage ripple in the actual application.
P1-P3P4-P6P7-P9P10-P10

BR301

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Description:
DC DC CONVERTER 3.3V 3W
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