BP5275-18 Datasheet, PDF (1/9 Pages) Rohm – Non-Isolated Step-Down 3-Terminal DC/DC Converters

Data Sheet
Non-Isolated Step-Down 3-Terminal DC/DC Converters
BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50
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.
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)
13.8 MAX 2xC0.5 5.2
C0.5
2.54±0.2
0.75
0.5
1.3
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
Input voltage
Output voltage
Maximum output current
(no heat sink / include heat sink)
Power conversion
efficiency (Vin=12V)
BP5275−18 BP5275−25 BP5275−33 BP5275−50
Unit
4.5 to 14
4.5 to 14
5.0 to 14
6.0 to 14
V
1.8
2.5
3.3
5.0
V
500 / 800
500 / 800
500 / 800
500 / 800
mA
73
78
83
88
%
Absolute maximum ratings (Ta=25°C)
Parameter
Limits
Symbol
Unit
BP5275−18 BP5275−25 BP5275−33 BP5275−50
Input voltage
VIn
15
15
15
15
V
Operating temperature range
Topr
−30 to 85
−30 to 85
−30 to 85
−30 to 85
°C
Storage temperature range
Tstg
−40 to 105
−40 to 105
−40 to 105 −40 to 105
°C
Allowable maximum surface temperature
Tcmax
100
100
100
100
°C
Maximum output current 1
IO1max
500
500
500
500
°C
Maximum output current 2 (with Heat Sink) IO2max
800
800
800
800
°C
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2011.08 - Rev. A