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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)
2xC0.5
6.2 MAX.
2.6
16.3 MAX.
23.7
26.4 MAX.
C0.5
4.0±1.0
1
2 3
0.75
1.3
2.54±0.2
2.54±0.2
0.5
(2.3)
Note : Dimensions without tolerance is typical.
Pin function
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
Function
Input terminal
GND
Output termial
List of the series
BP5277−33
BP5277−50
BP5277−90
BP5277−12
BP5277−13
BP5277−15
Unit
Input voltage
36
36
36
36
36
36
V
Output voltage
3.3
5
9
12
13
15
V
500 / 800
500 / 800
500 / 800
500 / 800
500 / 800
500 / 800
mA
76
83
88
90
91
93
%
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
Symbol
Limits
BP5277−33
BP5277−50
BP5277−90
BP5277−12
BP5277−13
BP5277−15
Unit
Vi
36
36
36
36
36
36
V
Topr
−30 to 85
−30 to 85
−30 to 85
−30 to 85
−30 to 85
−30 to 85
°C
°C
Tstg
−40 to 105
−40 to 105
−40 to 105
−40 to 105
−40 to 105
−40 to 105
Allowable maximum surface temperature
Tcmax
100
100
100
100
100
100
°C
Maximum output current 1
IO1max
500
500
500
500
500
500
mA
Maximum output current 2 (with Heat Sink)
IO2max
800
800
800
800
800
800
mA
Storage temperature range
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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
Data Sheet
Measurement circuit
Vi(24V) 1
Control
Circuit
3
Vo
123
Ii
A
Vin
V Vi
Io
A
Vout
V Vo
GND
GND
GND 2
Electrical characteristics
BP5277−33 (Unless otherwise noted, Vi=24.0V, Io1=500mA)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Vi
8.0
24.0
32.0
V
DC
Output voltage
VO
3.23
3.30
3.37
V
IO1=0mA
Output current 1
I O1
0
−
500
mA
Output current 2
IO2
800
mA
With heat sink
Vr
0
−
−
Line regulation
5
50
mV
Vi=8 to 32V
Load regulation
Vl
−
5
50
mV
IO=0 to 500mA
Output ripple voltage
Vp
−
40
100
mVP-P
Conversion efficiency
η
71
76
−
%
f
−
900
−
kHz
Input voltage
Operation frequency
Conditions
∗1
∗1
∗1 Max output current should be reduced according to the surrounding temperature.
BP5277−50 (Unless otherwise noted, Vi=24.0V, Io1=500mA)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Vi
8.0
24.0
32.0
V
DC
Output voltage
VO
4.90
5.00
5.10
V
IO1=0mA
Output current 1
I O1
0
−
500
mA
−
800
mA
With heat sink
5
50
mV
Vi=8 to 32V
IO=0 to 500mA
Input voltage
Output current 2
IO2
Line regulation
Vr
0
−
Load regulation
Vl
−
5
50
mV
Output ripple voltage
Vp
−
40
100
mVP-P
Conversion efficiency
η
78
83
−
%
Operation frequency
f
−
900
−
kHz
Unit
Conditions
∗1
∗1
∗1 Max output current should be reduced according to the surrounding temperature.
BP5277−90 (Unless otherwise noted, Vi=24.0V, Io1=500mA)
Parameter
Symbol
Min.
Typ.
Max.
Conditions
Input voltage
Vi
12.0
24.0
32.0
V
DC
Output voltage
VO
8.80
9.00
9.20
V
IO1=0mA
Output current 1
I O1
0
−
500
mA
Output current 2
IO2
800
mA
With heat sink
Line regulation
Vr
0
−
−
5
50
mV
Vi=12 to 32V
Load regulation
Vl
−
5
50
mV
IO=0 to 500mA
Output ripple voltage
Vp
−
40
100
mVP-P
Conversion efficiency
η
83
88
−
%
Operation frequency
f
−
900
−
kHz
∗1
∗1
∗1 Max output current should be reduced according to the surrounding temperature.
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© 2011 ROHM Co., Ltd. All rights reserved.
2/9
2011.12 - Rev. A
BP5277-33 / BP5277-50 / BP5277-90 / BP5277-12 / BP5277-13 / BP5277-15
Data Sheet
Electrical characteristics
BP5277-12 (Unless otherwise noted, Vi=24.0V, Io1=500mA)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Vi
15.0
24.0
32.0
V
DC
Output voltage
VO
11.75
12.00
12.25
V
IO1=0mA
Output current 1
IO1
0
−
500
mA
−
800
mA
With heat sink
5
50
mV
Vi=15 to 32V
IO=0 to 500mA
Input voltage
Output current 2
IO2
Line regulation
Vr
0
−
Load regulation
Vl
−
5
50
mV
Output ripple voltage
Vp
−
40
100
mVP-P
Conversion efficiency
η
85
90
−
%
Operation frequency
f
−
900
−
kHz
Max.
Unit
Conditions
∗1
∗1
∗1 Max output current should be reduced according to the surrounding temperature.
BP5277−13 (Unless otherwise noted, Vi=24.0V, Io1=500mA)
Parameter
Symbol
Min.
Typ.
Conditions
Input voltage
Vi
16.5
24.0
32.0
V
DC
Output voltage
VO
12.70
13.00
13.30
V
IO1=0mA
500
mA
Output current 1
IO1
0
−
Output current 2
IO2
−
800
mA
With heat sink
Line regulation
Vr
0
−
5
50
mV
Vi=16.5 to 32V
Load regulation
Vl
−
5
50
mV
IO=0 to 500mA
Output ripple voltage
Vp
−
40
100
mVP-P
Conversion efficiency
η
86
91
−
%
Operation frequency
f
−
900
−
kHz
∗1
∗1
∗1 Max output current should be reduced according to the surrounding temperature.
BP5277−15 (Unless otherwise noted, Vi=24.0V, Io1=500mA)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Vi
19.0
24.0
32.0
V
DC
Output voltage
VO
14.70
15.00
15.30
V
IO1=0mA
Output current 1
IO1
0
−
500
mA
−
800
mA
With heat sink
5
50
mV
Vi=19 to 32V
IO=0 to 500mA
Input voltage
Output current 2
IO2
Line regulation
Vr
0
−
Load regulation
Vl
−
5
50
mV
Output ripple voltage
Vp
−
40
100
mVP-P
Conversion efficiency
η
88
93
−
%
Operation frequency
f
−
900
−
kHz
Conditions
∗1
∗1
∗1 Max output current should be reduced according to the surrounding temperature.
OPERATION NOTES
•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
occurred because of rapid start-up of power voltage. Be sure not to exceed absolute maximum ratings even momentarily.
•This product has a protection element for safety. The protection element is fused for safety when the current which the protection element will
fuse. Please evaluate sufficiently at using environment about the action when the output circuit shorts.
•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.
3/9
2011.12 - Rev. A
BP5277-33 / BP5277-50 / BP5277-90 / BP5277-12 / BP5277-13 / BP5277-15
Data Sheet
BP5277-33
Output Voltage vs. Temperature Fluctuation (Vi=24V)
7
6
6
Output Voltage Vo [V]
Output Voltage Vo [V]
Line Regulation (Io=500mA)
7
5
4
3
2
5
4
3
2
Ta=85°C
Ta=25°C
Ta=−30°C
1
Ta=85°C
Ta=25°C
Ta=−30°C
1
0
0
5
10
15
20
25
30
0
35
100
200
Intput Voltage Vi [V]
Power Conversion Efficiency Fluctuation (Ta=25°C)
400
500
Output Voltage vs. Input Voltage Fluctuation (Ta=25°C)
100
7
Power Conversion Efficiency η[%]
90
6
Output Voltage Vo [V]
80
70
60
50
40
30
5
4
3
2
Vi=8V
Vi=8V
20
Vi=24V
10
Vi=24V
1
Vi=32V
Vi=32V
0
0
100
0
200
300
400
500
0
100
200
Derating Curve (No heat sink)
Vi=24V, 32V
Load Current Io2 [mA]
70°C75°C
400
OPERATION RANGE
250mA
200
100mA
100
0
-40
500
1000
600
300
400
Derating Curve (With heat sink)
Vi=32V
Vi=24V
500
300
Output Current Io [mA]
Output Current Io [mA]
Load Current Io1 [mA]
300
Output Current Io [mA]
75°C
800
600
500mA
OPERATION RANGE
400
200
0
-20
0
20
40
60
80
100
-40
Ambient Temperature Ta [°C]
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© 2011 ROHM Co., Ltd. All rights reserved.
-20
0
20
40
60
80
100
Ambient Temperature Ta [°C]
4/9
2011.12 - Rev. A
BP5277-33 / BP5277-50 / BP5277-90 / BP5277-12 / BP5277-13 / BP5277-15
Data Sheet
BP5277-50
Output Voltage vs. Temperature Fluctuation (Vi=24V)
7
6
6
Output Voltage Vo [V]
Output Voltage Vo [V]
Line Regulation (Io=500mA)
7
5
4
3
2
Ta=85°C
Ta=25°C
Ta=−30°C
1
5
4
3
2
Ta=85°C
Ta=25°C
Ta=−30°C
1
0
0
10
5
15
20
25
30
35
0
100
Intput Voltage Vi [V]
Power Conversion Efficiency Fluctuation (Ta=25°C)
300
400
500
Output Voltage vs. Input Voltage Fluctuation (Ta=25°C)
100
7
Power Conversion Efficiency η[%]
90
6
Output Voltage Vo [V]
80
70
60
50
40
30
Vin=8V
20
5
4
3
2
Vin=24V
10
Vin=8V
Vin=24V
1
Vin=32V
Vin=32V
0
0
100
200
300
400
0
500
0
100
Output Current Io [mA]
400
500
Vi=24V, 32V
1000
600
Load Current Io2 [mA]
65°C 73°C
400
300
OPERATION RANGE
200
150mA
100mA
100
0
-40
300
Derating Curve (With heat sink)
Vi=32V
Vi=24V
500
200
Output Current Io [mA]
Derating Curve (No heat sink)
Load Current Io1 [mA]
200
Output Current Io [mA]
75°C
800
600
500mA
OPERATION RANGE
400
200
0
-20
0
20
40
60
80
100
-40
Ambient Temperature Ta [°C]
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© 2011 ROHM Co., Ltd. All rights reserved.
-20
0
20
40
60
80
100
Ambient Temperature Ta [°C]
5/9
2011.12 - Rev. A
BP5277-33 / BP5277-50 / BP5277-90 / BP5277-12 / BP5277-13 / BP5277-15
Data Sheet
BP5277-90
Output Voltage vs. Temperature Fluctuation (Vi=24V)
16
14
14
12
12
Output Voltage Vo [V]
Output Voltage Vo [V]
Line Regulation (Io=500mA)
16
10
8
6
Ta=85°C
Ta=25°C
Ta=−30°C
4
2
10
8
6
Ta=85°C
Ta=25°C
Ta=−30°C
4
2
0
0
10
15
20
25
30
35
0
100
Intput Voltage Vi [V]
Power Conversion Efficiency Fluctuation (Ta=25°C)
400
500
16
90
Power Conversion Efficiency η[%]
300
Output Voltage vs. Input Voltage Fluctuation (Ta=25°C)
100
14
Output Voltage Vo [V]
80
70
60
50
40
30
Vi=12V
20
12
10
8
6
Vi=12V
4
Vi=24V
10
Vi=24V
2
Vi=32V
Vi=32V
0
0
0
100
200
300
400
500
0
100
Derating Curve (No heat sink)
400
500
Vi=24V, 32V
1000
Load Current Io2 [mA]
600
65°C 70°C
400
300
OPERATION RANGE
200
150mA
100
0
-40
300
Derating Curve (With heat sink)
Vi=32V
Vi=24V
500
200
Output Current Io [mA]
Output Current Io [mA]
Load Current Io1 [mA]
200
Output Current Io [mA]
70°C
800
600
OPERATION RANGE
400
400mA
200
80mA
0
-20
0
20
40
60
80
100
-40
Ambient Temperature Ta [°C]
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© 2011 ROHM Co., Ltd. All rights reserved.
-20
0
20
40
60
80
100
Ambient Temperature Ta [°C]
6/9
2011.12 - Rev. A
BP5277-33 / BP5277-50 / BP5277-90 / BP5277-12 / BP5277-13 / BP5277-15
Data Sheet
BP5277-12
Output Voltage vs. Temperature Fluctuation (Vi=24V)
16
14
14
12
12
Output Voltage Vo [V]
Output Voltage Vo [V]
Line Regulation (Io=500mA)
16
10
8
6
4
10
8
6
4
Ta=85°C
Ta=25°C
Ta=−30°C
2
Ta=85°C
Ta=25°C
Ta=−30°C
2
0
0
10
15
20
25
30
100
0
35
Intput Voltage Vi [V]
Power Conversion Efficiency Fluctuation (Ta=25°C)
400
500
16
90
14
80
Output Voltage Vo [V]
Power Conversion Efficiency η[%]
300
Output Voltage vs. Input Voltage Fluctuation (Ta=25°C)
100
70
60
50
40
30
12
10
8
6
Vi=15V
Vi=24V
Vi=32V
20
10
Vi=15V
Vi=24V
Vi=32V
4
2
0
0
0
100
200
300
400
500
0
100
Output Current Io [mA]
Load Current Io [mA]
400
300
OPERATION RANGE
200
150mA
100
80mA
0
20
40
60
80
70°C
800
600
OPERATION RANGE
400
400mA
200
0
-40
100
Ambient Temperature Ta [°C]
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© 2011 ROHM Co., Ltd. All rights reserved.
500
Vi=24V, 32V
63°C 70°C
-20
400
1000
600
0
-40
300
Derating Curve (With heat sink)
Vi=32V
Vi=24V
500
200
Output Current Io [mA]
Derating Curve (No heat sink)
Load Current Io [mA]
200
Output Current Io [mA]
-20
0
20
40
60
80
100
Ambient Temperature Ta [°C]
7/9
2011.12 - Rev. A
BP5277-33 / BP5277-50 / BP5277-90 / BP5277-12 / BP5277-13 / BP5277-15
Data Sheet
BP5277-13
Output Voltage vs. Temperature Fluctuation (Vi=24V)
18
16
16
14
14
Output Voltage Vo [V]
Output Voltage Vo [V]
Line Regulation (Io=500mA)
18
12
10
8
6
Ta=85°C
Ta=25°C
Ta=−30°C
4
2
12
10
8
6
Ta=85°C
Ta=25°C
Ta=−30°C
4
2
0
0
15
20
25
30
0
35
100
Intput Voltage Vi [V]
Power Conversion Efficiency Fluctuation (Ta=25°C)
90
16
Power Conversion Efficiency η[%]
18
80
400
500
14
Output Voltage Vo [V]
70
60
50
40
30
12
10
8
6
Vi=16.5V
Vi=24V
Vi=32V
10
300
Output Voltage vs. Input Voltage Fluctuation (Ta=25°C)
100
20
200
Output Current Io [mA]
Vi=16.5V
Vi=24V
Vi=32V
4
2
0
0
100
200
300
400
500
0
100
200
300
400
500
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
1000
Load Current Io2 [mA]
Load Current Io1 [mA]
600
60°C 67°C
500
400
300
OPERATION RANGE
200
160mA
100
0
-40
80mA
-20
0
20
40
60
80
600
OPERATION RANGE
400
300mA
200
0
-40
100
Ambient Temperature Ta [°C]
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© 2011 ROHM Co., Ltd. All rights reserved.
65°C
800
-20
0
20
40
60
80
100
Ambient Temperature Ta [°C]
8/9
2011.12 - Rev. A
BP5277-33 / BP5277-50 / BP5277-90 / BP5277-12 / BP5277-13 / BP5277-15
Data Sheet
BP5277-15
Output Voltage vs. Temperature Fluctuation (Vi=24V)
18
16
16
14
14
Output Voltage Vo [V]
Output Voltage Vo [V]
Line Regulation (Io=500mA)
18
12
10
8
6
12
10
8
6
Ta=85°C
Ta=25°C
Ta=−30°C
4
2
Ta=85°C
Ta=25°C
Ta=−30°C
4
2
0
0
15
20
25
30
0
35
100
200
Intput Voltage Vi [V]
18
90
16
80
70
60
50
40
30
12
10
8
6
Vi=19V
Vi=24V
Vi=32V
4
2
0
0
0
100
200
300
400
0
500
100
200
Output Current Io [mA]
300
400
Derating Curve (With heat sink)
Vi=32V
Vi=24V
Vi=24V, 32V
1000
600
Load Current Io2 [mA]
60°C 67°C
500
400
300
OPERATION RANGE
200
160mA
85mA
100
0
-40
500
Output Current Io [mA]
Derating Curve (No heat sink)
Load Current Io1 [mA]
500
14
Vi=19V
Vi=24V
Vi=32V
10
400
Output Voltage vs. Input Voltage Fluctuation (Ta=25°C)
Output Voltage Vo [V]
Power Conversion Efficiency η[%]
Power Conversion Efficiency Fluctuation (Ta=25°C)
100
20
300
Output Current Io [mA]
65°C
800
600
OPERATION RANGE
400
300mA
200
0
-20
0
20
40
60
80
100
-40
Ambient Temperature Ta [°C]
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© 2011 ROHM Co., Ltd. All rights reserved.
-20
0
20
40
60
80
100
Ambient Temperature Ta [°C]
9/9
2011.12 - Rev. A
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specified herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
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