Data Sheet
Non-Isolated Step-Down 3-Terminal DC/DC Converters
BP5277-33 / BP5277-50 / BP5277-90 / BP5277-12 / BP5277-13 / BP5277-15
Description
The BP5275 series of DC/DC converters utilize high rated
voltage.
A control circuit, switching element, and coil are built in, along
with input/output capacitors, resulting in stable operation with
no external components required.
High conversion efficiency, combined with an original heat
dissipation structure, enables configuration an ultra-compact
switching power supplies.
500mA output is possible with no heat sink required (800mA
with heat sink).
In addition, the ICs are pin-compatible with conventional
TO-220 LDO regulators, making replacement easy.
Low ripple voltage with high precision output ensure stable
operation against the fluctuating voltages from main power
supplies, making them ideal for use as local power supplies
(i.e. for microcontrollers).
Dimensions
(Unit : mm)
ec
N
ew om
m
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ns d
f
2xC0.5
16.3 MAX.
2.6
C0.5
26.4 MAX.
23.7
1
2 3
4.0±1.0
2.54±0.2
0.75
1.3
2.54±0.2
0.5
Note : Dimensions without tolerance is typical.
Pin function
List of the series
ot
R
Pin No.
Pin Name
Applications
Power supplies for copiers, personal computers,
1
Vi
facsimiles, AV equipment, measuring instruments,
2
GND
vending machines, security device, registers,
3
Vo
industrial equipment, and maintenance tools
Features
1) High rated voltage
2) No external parts required
3) High power conversion efficiency.
4) Heat sink unnecessary.
5) Low output ripple voltage
6) High output voltage accuracy
7) Pin-compatible with conventional 3-pin LDOs
8) Compact package.
BP5277-33 / BP5277-50 / BP5277-90 / BP5277-12 / BP5277-13 / BP5277-15 : SIP3
BP5277
−
33
36
BP5277
−
50
36
5
500 / 800
83
BP5277
−
90
36
9
500 / 800
88
BP5277
−
12
36
12
500 / 800
90
BP5277
−
13
36
13
500 / 800
91
Input voltage
Output voltage
3.3
500 / 800
76
N
Maximum output current
(no heat sink / include heat sink)
Power conversion
efficiency (Vi=24V)
Absolute maximum ratings (Ta=25°C)
Parameter
Input voltage
Operating temperature range
Storage temperature range
Allowable maximum surface temperature
Maximum output current 1
Maximum output current 2 (with Heat Sink)
Symbol
Vi
Topr
Tstg
Tcmax
I
O
1max
I
O
2max
Limits
BP5277
−
33
36
−30
to 85
−40
to 105
100
500
800
BP5277
−
50
36
−30
to 85
−40
to 105
100
500
800
BP5277
−
90
36
−30
to 85
−40
to 105
100
500
800
BP5277
−
12
36
−30
to 85
−40
to 105
100
500
800
BP5277
−
13
36
−30
to 85
−40
to 105
100
500
800
BP5277
−
15
36
−30
to 85
−40
to 105
100
500
800
Unit
V
or
6.2 MAX.
(2.3)
Function
Input terminal
GND
Output termial
BP5277
−
15
36
15
500 / 800
93
Unit
V
V
mA
%
°C
°C
°C
mA
mA
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© 2011 ROHM Co., Ltd. All rights reserved.
1/9
2011.12 -
Rev. A
BP5277-33 / BP5277-50 / BP5277-90 / BP5277-12 / BP5277-13 / BP5277-15
Block diagram
Vi(24V)
1
Data Sheet
Measurement circuit
Control
Circuit
3
Vo
Vin
GND
Ii
A
V Vi
123
Io
A
V Vo
Vout
GND
GND
2
Electrical characteristics
BP5277−33
(Unless otherwise noted, Vi=24.0V, Io1=500mA)
Parameter
Input voltage
Symbol
Vi
Min.
8.0
Output voltage
Output current 1
Output current 2
Line regulation
Load regulation
Output ripple voltage
Conversion efficiency
Operation frequency
∗1
Max output current should be reduced according to the surrounding temperature.
BP5277−50
(Unless otherwise noted, Vi=24.0V, Io1=500mA)
Parameter
Input voltage
Symbol
Vi
Min.
8.0
Output voltage
Output current 1
Output current 2
Line regulation
Load regulation
R
Output ripple voltage
Conversion efficiency
Operation frequency
ot
∗1
Max output current should be reduced according to the surrounding temperature.
BP5277−90
(Unless otherwise noted, Vi=24.0V, Io1=500mA)
Parameter
Symbol
Vi
V
O
I
O
1
I
O
2
Vr
Vl
Vp
η
f
Min.
12.0
8.80
0
0
−
−
−
83
−
Input voltage
Output voltage
Output current 1
Output current 2
Line regulation
Load regulation
Output ripple voltage
Conversion efficiency
Operation frequency
N
∗1
Max output current should be reduced according to the surrounding temperature.
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© 2011 ROHM Co., Ltd. All rights reserved.
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Typ.
Max.
32.0
3.37
500
800
50
50
Unit
V
Conditions
24.0
3.30
−
−
DC
V
O
3.23
0
V
I
O
1=0mA
I
O
1
mA
mA
∗1
∗1
I
O
2
Vr
Vl
0
−
−
−
With heat sink
5
5
mV
Vi=8 to 32V
mV
I
O
=0 to 500mA
Vp
η
f
40
76
100
−
−
mV
P-P
%
71
−
900
kHz
Typ.
Max.
32.0
5.10
500
800
50
50
Unit
V
Conditions
24.0
5.00
−
−
DC
V
O
4.90
0
V
I
O
1=0mA
I
O
1
mA
mA
I
O
2
Vr
Vl
0
−
−
−
With heat sink
5
5
mV
Vi=8 to 32V
mV
I
O
=0 to 500mA
Vp
η
f
40
83
100
−
−
mV
P-P
%
78
−
900
kHz
Typ.
24.0
9.00
−
−
5
5
40
88
900
Max.
32.0
9.20
500
800
50
50
100
−
−
Unit
V
V
mA
mA
mV
mV
mV
P-P
%
kHz
With heat sink
Vi=12 to 32V
I
O
=0 to 500mA
DC
I
O
1=0mA
Conditions
2/9
or
∗1
∗1
∗1
∗1
2011.12 -
Rev. A
BP5277-33 / BP5277-50 / BP5277-90 / BP5277-12 / BP5277-13 / BP5277-15
Electrical characteristics
BP5277-12
(Unless otherwise noted, Vi=24.0V, Io1=500mA)
Parameter
Input voltage
Output voltage
Output current 1
Output current 2
Line regulation
Load regulation
Output ripple voltage
Conversion efficiency
Operation frequency
Symbol
Vi
V
O
I
O
1
I
O
2
Vr
Vl
Vp
η
f
Min.
15.0
11.75
0
0
−
−
−
85
−
Typ.
24.0
12.00
−
−
5
5
40
90
900
Max.
32.0
12.25
500
800
50
50
100
−
−
Unit
V
V
mA
mA
mV
mV
mV
P-P
%
kHz
With heat sink
Vi=15 to 32V
I
O
=0 to 500mA
DC
I
O
1=0mA
∗1
∗1
Data Sheet
Conditions
∗1
Max output current should be reduced according to the surrounding temperature.
BP5277−13
(Unless otherwise noted, Vi=24.0V, Io1=500mA)
Parameter
Input voltage
Symbol
Vi
Min.
16.5
Output voltage
Output current 1
Output current 2
Line regulation
Load regulation
Output ripple voltage
Conversion efficiency
Operation frequency
∗1
Max output current should be reduced according to the surrounding temperature.
BP5277−15
(Unless otherwise noted, Vi=24.0V, Io1=500mA)
Parameter
Input voltage
Symbol
Vi
Min.
19.0
Output voltage
Output current 1
Output current 2
Line regulation
Load regulation
Output ripple voltage
Conversion efficiency
Operation frequency
N
ot
∗1
Max output current should be reduced according to the surrounding temperature.
OPERATION NOTES
occurred because of rapid start-up of power voltage. Be sure not to exceed absolute maximum ratings even momentarily.
fuse. Please evaluate sufficiently at using environment about the action when the output circuit shorts.
•There is fear of destruction of the internal circuit in case that input voltage exceeds the absolute maximum ratings (36V) by such as a surge
•This product has a protection element for safety. The protection element is fused for safety when the current which the protection element will
•There are some case that the module generates heat exceeding allowable maximum surface temperature when the load current which exceeds
the maximum output current is flowed. Please make design keeping enough margins not to exceed allowable maximum surface temperature at
any time under any application or any test conditions.
•The aluminum board at back part of the product is connected to GND.
Please mind the arrangement not to contact surrounding parts.
•When using the module with bent lead pin, it might be destroyed with an extreme stress for the PCB or the aluminum board. Please use the
module without bending the lead pin.
•The aluminum board in the back might come off when an excessive stress is put in the direction of the thickness. When fixing to the heat sink
etc. to use this product, please mount to PCB after fixing to the heat sink and both the heat sink and this hold to PCB.
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© 2011 ROHM Co., Ltd. All rights reserved.
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Typ.
Max.
32.0
Unit
V
Conditions
24.0
DC
V
O
12.70
0
0
−
−
−
13.00
−
−
13.30
500
800
50
50
V
I
O
1=0mA
I
O
1
mA
mA
∗1
∗1
I
O
2
Vr
Vl
With heat sink
5
5
mV
mV
Vi=16.5 to 32V
I
O
=0 to 500mA
Vp
η
f
40
91
100
−
−
mV
P-P
%
86
−
900
kHz
Typ.
Max.
32.0
Unit
V
Conditions
24.0
DC
V
O
14.70
0
0
−
−
−
15.00
−
−
15.30
500
800
50
50
V
I
O
1=0mA
I
O
1
mA
mA
I
O
2
Vr
Vl
With heat sink
5
5
mV
mV
Vi=19 to 32V
R
I
O
=0 to 500mA
Vp
η
f
40
93
100
−
−
mV
P-P
%
88
−
900
kHz
3/9
or
∗1
∗1
2011.12 -
Rev. A
BP5277-33 / BP5277-50 / BP5277-90 / BP5277-12 / BP5277-13 / BP5277-15
BP5277-33
Data Sheet
Line Regulation (Io=500mA)
7
Output Voltage vs. Temperature Fluctuation (Vi=24V)
7
6
6
Output Voltage
Vo [V]
Output Voltage Vo [V]
4
4
2
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2
3
3
1
Ta=85
°C
Ta=25
°C
Ta=−30
°C
30
1
0
5
0
10
15
20
25
35
0
100
or
Ta=85
°C
Ta=25
°C
Ta=−30
°C
400
500
200
300
5
5
Intput Voltage Vi [V]
Output Current Io [mA]
Power Conversion Efficiency Fluctuation (Ta=25°C)
100
Output Voltage vs. Input Voltage Fluctuation (Ta=25°C)
7
Power Conversion Efficiency
η[%]
90
80
70
60
50
40
30
20
10
0
0
6
Output Voltage Vo [V]
5
4
3
Vi=8V
2
Vi=8V
Vi=24V
Vi=32V
400
500
Vi=24V
Vi=32V
400
1
0
100
200
300
500
0
100
200
300
ot
R
Output Current Io [mA]
Output Current
Io [mA]
Derating Curve (No heat sink)
Derating Curve (With heat sink)
Vi=24V, 32V
Vi=32V
Vi=24V
600
500
400
300
200
100
1000
N
Load Current Io2 [mA]
Load Current Io1 [mA]
70°C75°C
800
75°C
600
500mA
400
OPERATION RANGE
OPERATION RANGE
250mA
100mA
200
0
-40
0
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
Ambient Temperature Ta [°C]
Ambient Temperature Ta [°C]
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
4/9
2011.12 -
Rev. A
BP5277-33 / BP5277-50 / BP5277-90 / BP5277-12 / BP5277-13 / BP5277-15
BP5277-50
Data Sheet
Line Regulation (Io=500mA)
7
Output Voltage vs. Temperature Fluctuation (Vi=24V)
7
6
6
4
4
2
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2
3
3
1
Ta=85
°C
Ta=25
°C
Ta=−30
°C
30
1
0
0
5
10
15
20
25
35
0
100
or
Ta=85
°C
Ta=25
°C
Ta=−30
°C
400
500
200
300
5
Output Voltage
Vo [V]
Output Voltage Vo [V]
5
Intput Voltage Vi [V]
Output Current Io [mA]
Power Conversion Efficiency Fluctuation (Ta=25°C)
100
Output Voltage vs. Input Voltage Fluctuation (Ta=25°C)
7
Power Conversion Efficiency
η[%]
90
80
70
60
50
40
30
20
10
0
6
Output Voltage Vo [V]
5
4
3
Vin=8V
2
Vin=8V
Vin=24V
Vin=32V
400
500
Vin=24V
Vin=32V
400
1
0
100
200
300
500
0
0
100
200
300
ot
R
Output Current Io [mA]
Output Current
Io [mA]
Derating Curve (No heat sink)
Derating Curve (With heat sink)
Vi=24V, 32V
Vi=32V
Vi=24V
600
500
400
300
1000
N
Load Current Io1 [mA]
Load Current Io2 [mA]
65°C 73°C
75°C
800
600
500mA
400
OPERATION RANGE
OPERATION RANGE
200
150mA
100
0
-40
100mA
200
0
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
Ambient Temperature Ta [°C]
Ambient Temperature Ta [°C]
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© 2011 ROHM Co., Ltd. All rights reserved.
5/9
2011.12 -
Rev. A
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