BP5275-18 [ROHM]
Non-Isolated Step-Down 3-Terminal DC/DC Converters; 非隔离降压型三端DC / DC转换器
| 型号： | BP5275-18 |
| 厂家： | 
ROHM |
| 描述： | Non-Isolated Step-Down 3-Terminal DC/DC Converters |
| 文件： | 总9页 (文件大小：614K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Data Sheet
Non-Isolated Step-Down 3-Terminal DC/DC Converters
BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50
Dimensions (Unit : mm)
Description
The BP5275 series of DC/DC converters utilize a synchronous
rectification system.
A control circuit, switching element, and coil are built in, along
with input/output capacitors, resulting in stable operation with
no external components required.
5.2
13.8 MAX
2xC0.5
C0.5
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).
0.75
1.3
2.54 0.2
0.5
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).
2.54 0.2
Pin No.1
2
3
Note : Dimensions without tolerance is typical.
Applications
Power supplies for copiers, personal computers,
facsimiles, AV equipment, measuring instruments,
vending machines, security device, registers,
industrial equipment, and maintenance tools
Features
1) No external parts required
2) High power conversion efficiency.
3) Heat sink unnecessary.
4) Low output ripple voltage
5) High output voltage accuracy
6) Pin-compatible with conventional 3-pin LDOs
7) Compact package.
BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50 : SIP3
List of the series
BP5275−18
4.5 to 14
1.8
BP5275−25
4.5 to 14
2.5
BP5275−33
5.0 to 14
3.3
BP5275−50
6.0 to 14
5.0
Unit
V
Input voltage
Output voltage
V
Maximum output current
(no heat sink / include heat sink)
500 / 800
73
500 / 800
78
500 / 800
83
500 / 800
88
mA
%
Power conversion
efficiency (Vin=12V)
Absolute maximum ratings (Ta=25°C)
Limits
Parameter
Input voltage
Symbol
Unit
BP5275−18
BP5275−25
BP5275−33
BP5275−50
15
15
15
15
VIn
V
−30 to 85
−40 to 105
100
−30 to 85
−40 to 105
100
−30 to 85
−40 to 105
100
−30 to 85
−40 to 105
100
Operating temperature range
Storage temperature range
°C
Topr
Tstg
°C
°C
°C
°C
Allowable maximum surface temperature
Maximum output current 1
Tcmax
IO1max
500
500
500
500
Maximum output current 2 (with Heat Sink)
800
800
800
800
IO2max
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev. A
1/7
BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50
Data Sheet
Block diagram
Measurement circuit
1
2 3
Control
Circuit
Io
Vin
A
A
Vout
GND
V
V
V
Vin
GND
Electrical characteristics
BP5275−18 (Unless otherwise noted : Ta=25°C, Vin=12V, lo1=500mA)
Parameter
Symbol
Min.
Typ.
Max.
Unit
V
Conditions
DC
Vin
4
12
14
Input voltage
VO
1.75
0
1.80
1.85
500
800
50
V
IO1=0mA
Output voltage
1
1
IO1
mA
mA
mV
mV
Output current 1
Output current 2
Line regulation
IO2
With heat sink
Vin=4 to 14V
IO=0 to 500mA
0
5
10
5
Vr
Vl
50
Load regulation
mVP-P
msec
%
80
Output ripple voltage
Minimum start-up time
Conversion efficiency
Vp
Ts
Vin=0V 3V,Ro=3.6Ω
4
7
65
73
Operation frequency
f
1.5
MHz
1 Derating required according to the input voltage and ambient temperature.
BP5275-25 (Unless otherwise noted : Ta=25°C, Vin=12V, lo1=500mA)
Parameter
Input voltage
Symbol
Vin
Min.
4
Typ.
12
Max.
14
Unit
V
Conditions
DC
Output voltage
VO
2.45
0
2.50
2.55
500
800
50
V
IO1=0mA
Output current 1
Output current 2
Line regulation
1
1
IO1
mA
mA
mV
mV
mVP-P
msec
%
IO2
0
With heat sink
Vin=4 to 14V
5
10
5
Vr
Vl
Load regulation
50
IO1=0 to 500mA
Output ripple voltage
Minimum start-up time
Conversion efficiency
50
Vp
Ts
Vin=3V 4V,Ro=5Ω
4
7
73
78
Operation frequency
f
1.5
MHz
1 Derating required according to the input voltage and ambient temperature.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev. A
2/7
BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50
Data Sheet
Electrical characteristics
BP5275−33 (Unless otherwise noted :Ta=25°C, Vin=12V, lo1=500mA)
Parameter
Symbol
Min.
4.5
3.23
0
Typ.
Max.
Unit
V
Conditions
Input voltage
DC
Vin
12
14
Output voltage
IO1=0mA
VO
3.30
3.37
500
800
50
V
1
1
Output current 1
Output current 2
Line regulation
IO1
mA
mA
mV
mV
mVP-P
msec
%
IO2
0
With heat sink
Vin=4.5 to 14V
IO=0 to 500mA
5
10
5
Vr
Vl
Load regulation
50
Output ripple voltage
Minimum start-up time
Conversion efficiency
50
Vp
Ts
Vin=3V 4.5V,Ro=6.6Ω
4
7
78
83
Operation frequency
f
1.5
MHz
1 Derating required according to the input voltage and ambient temperature.
BP5275-50 (Unless otherwise noted : Ta=25°C, Vin=12V, lo1=500mA)
Parameter
Input voltage
Symbol
Vin
Min.
6
Typ.
12
Max.
14
Unit
V
Conditions
DC
Output voltage
VO
4.9
0
5.0
5.1
500
800
50
V
IO1=0mA
Output current 1
Output current 2
Line regulation
1
1
IO1
mA
mA
mV
mV
mVP-P
msec
%
IO2
0
With heat sink
Vin=6 to 14V
5
10
5
Vr
Vl
Load regulation
50
IO1=0 to 500mA
Output ripple voltage
Minimum start-up time
Conversion efficiency
50
Vp
Ts
Vin=3V 6V,Ro=10Ω
4
83
7
88
1.5
Operation frequency
f
MHz
1 Derating required according to the input voltage and ambient temperature.
●OPERATION NOTES
・This module will stop outputting because of protection circuit when the input voltage becomes maximum input voltage or less.
Please note that the input voltage must not become maximum input voltage in any state of the load.
・After the circuit starts, the output voltage needs to become the fixed voltage within minimum activation time.
If the output voltage is below the fixed voltage after the minimum activation time, it doesn’t work because of the protection circuit.
Please evaluate sufficiently about activation characteristics of input voltage and load characteristics when starting.
・When the output circuit shorts, short-circuit protection of timer-latch type will work and stop outputting.
To release the protection, it is necessary to turn on the switch again.
This product also has protection element for safety. The protection element is fused if the current, with which the protection
element will fuse, will be input by the time the short-circuit protection of timer-latch hangs.
Please evaluate sufficiently at using environment about the action when the output circuit shorts.
・There are some case that the heat generates at the module by exceeding allowable maximum surface temperature when the
load current which exceeds the maximum output current is electrified.
Please make design keeping enough margins not to exceed allowable maximum surface temperature at any time under any
application or any test conditions.
・The heat sink at back parts of the product is connected to GND. Please mind the arrangement not to contact with
surrounding parts.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev. A
3/7
BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50
Data Sheet
●BP5275-18
Line Regulation
Output Voltage vs. Temperature Fluctuation（Vin=12V）
1.85
1.84
1.83
1.82
1.81
1.80
1.79
1.78
1.85
1.84
1.83
1.82
1.81
1.80
1.79
1.78
Ta= 80°C
Ta= 80°C
1.77
1.77
Ta= 25°C
Ta= 25°C
1.76
1.76
Ta=−35°C
Ta=−35°C
1.75
1.75
0
2
4
6
8
10 12 14 16
0
100
200
300
400
500
Intput Voltage Vin [V]
Output Current Io [ｍＡ]
Power Conversion Efficiency Fluctuation（Ta=25°C）
100
Output Voltage vs. Input Voltage Fluctuation（Ta=25°C）
1.85
1.84
1.83
1.82
1.81
1.80
1.79
1.78
90
80
70
60
50
40
30
20
10
0
Vin= 6V
Vin= 6V
Vin=12V
Vin=14V
1.77
Vin=12V
1.76
Vin=14V
1.75
0
100
200
300
400
500
0
100
200
300
400
500
Output Current Io [ｍＡ]
Output Current Io [ｍＡ]
Derating Curve (With heat sink)
Derating Curve (No heat sink)
Vin=10V以下
Vin=12V
Vin=14V
Vin=12V以下
Vin=14V
1000
600
500
400
300
200
100
0
76℃
65
℃ 75℃
800
600
400
200
0
550mA
333mA
250mA
OPERATION RANGE
OPERATION RANGE
-40
-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.
2011.08 - Rev. A
4/7
BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50
Data Sheet
●BP5275-25
Output Voltage vs. Temperature Fluctuation（Vin=12V）
Line Regulation
2.55
2.55
2.54
2.53
2.52
2.51
2.50
2.49
2.48
2.54
2.53
2.52
2.51
2.50
2.49
2.48
Ta= 80°C
Ta= 80°C
2.47
2.47
Ta= 25°C
Ta= 25°C
2.46
2.46
Ta=−35°C
Ta=−35°C
2.45
2.45
0
2
4
6
8
10
12
14
16
0
100
200
300
400
500
Intput Voltage Vin [V]
Output Current Io [ｍＡ]
Output Voltage vs. Input Voltage Fluctuation（Ta=25°C）
Power Conversion Efficiency Fluctuation（Ta=25°C）
100
90
80
70
60
50
40
30
2.55
2.54
2.53
2.52
2.51
2.50
2.49
2.48
Vin= 6V
Vin= 6V
2.47
20
Vin=12V
Vin=12V
2.46
10
Vin=14V
Vin=14V
2.45
0
0
100
200
300
400
500
0
100
200
300
400
500
Output Current Io [ｍＡ]
Output Current Io [ｍＡ]
Derating Curve (With heat sink)
Derating Curve (No heat sink)
Vin=10V以下
Vin=12V
Vin=14V
Vin=12V以下
Vin=14V
1000
800
600
400
200
0
600
500
400
300
200
100
0
74℃
65
℃ 75℃
528mA
333mA
250mA
OPERATION RANGE
OPERATION RANGE
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
Ambient Temperature Ta [℃]
Ambient Temperature Ta [℃]
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev. A
5/7
BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50
Data Sheet
●BP5275-33
Line Regulation
Output Voltage vs. Temperature Fluctuation（Vin=12V）
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
Ta= 80°C
Ta= 80°C
3.24
3.24
Ta= 25°C
Ta= 25°C
3.22
3.22
Ta=−35°C
Ta=−35°C
3.20
3.20
0
2
4
6
8
10 12 14 16
0
100
200
300
400
500
Intput Voltage Vin [V]
Output Current Io [ｍＡ]
Output Voltage vs. Input Voltage Fluctuation（Ta=25°C）
Power Conversion Efficiency Fluctuation（Ta=25°C）
100
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
90
80
70
60
50
40
30
Vin= 6V
Vin= 6V
3.24
20
Vin=12V
Vin=12V
3.22
10
Vin=14V
Vin=14V
3.20
0
0
100
200
300
400
500
0
100
200
300
400
500
Output Current Io [ｍＡ]
Output Current Io [ｍＡ]
Derating Curve (With heat sink)
Derating Curve (No heat sink)
Vin=10V以下
Vin=12V
Vin=14V
Vin=12V以下
Vin=14V
1000
800
600
400
200
0
600
500
400
300
200
100
0
73
℃
65
℃ 75℃
333mA
250mA
505mA
OPERATION RANGE
OPERATION RANGE
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
Ambient Temperature Ta [℃]
Ambient Temperature Ta [℃]
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev. A
6/7
BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50
Data Sheet
●BP5275-50
Line Regulation
5.10
Output Voltage vs. Temperature Fluctuation（Vin=12V）
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
5.08
5.06
5.04
5.02
5.00
4.98
4.96
Ta= 80°C
Ta= 80°C
4.94
4.94
Ta= 25°C
Ta= 25°C
4.92
4.92
Ta=−35°C
Ta=−35°C
4.90
4.90
0
2
4
6
8
10 12 14 16
0
100
200
300
400
500
Intput Voltage Vin [V]
Output Current Io [ｍＡ]
Power Conversion Efficiency Fluctuation（Ta=25°C）
100
Output Voltage vs. Input Voltage Fluctuation（Ta=25°C）
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
90
80
70
60
50
40
30
20
10
0
Vin= 6V
Vin= 6V
Vin=12V
Vin=14V
4.94
Vin=12V
4.92
Vin=14V
4.90
0
100
200
300
400
500
0
100
200
300
400
500
Output Current Io [ｍＡ]
Output Current Io [ｍＡ]
Derating Curve (With heat sink)
Derating Curve (No heat sink)
Vin=10V以下
Vin=12V
Vin=14V
Vin=12V以下
Vin=14V
1000
800
600
400
200
0
600
500
400
300
200
100
0
72℃
65
℃ 75℃
333mA
250mA
480mA
OPERATION RANGE
OPERATION RANGE
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
Ambient Temperature Ta [℃]
Ambient Temperature Ta [℃]
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev. A
7/7
Notice
N o t e s
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, commu-
nication 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, fuel-
controller 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.
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© 2011 ROHM Co., Ltd. All rights reserved.
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