Datasheet

3/7
2011.08 - Rev. A
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
Data Sheet
BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50
BP5275−33 (Unless otherwise noted :Ta=25°C, Vin=12V, lo1=500mA)
Parameter Symbol Unit ConditionsMin. Typ. Max.
Vin 4.5
3.23
0
0
4
78
12
3.30
5
10
5
7
83
14
3.37
500
800
50
50
50
V
V
O V
I
O1
Vl
I
O2
mA
mA
With heat sink
Vr
mV
Vp
Ts
mV
msec
I
O=0 to 500mA
Vin=3V 4.5V,Ro=6.6Ω
Vin=4.5 to 14V
mV
P-P


%
I
O1=0mA






DC
1
1
BP5275-50 (Unless otherwise noted : Ta=25°C, Vin=12V, lo1=500mA)
Parameter Symbol Unit ConditionsMin. Typ. Max.
Vin 6
4.9
0
0
4
83
12
5.0
5
10
5
7
88
14
5.1
500
800
50
50
50
V
V
O V
I
O1
Vl
I
O2
mA
mA
Vr
mV
Vp
Ts
mV
msec
I
O1=0 to 500mA
Vin=3V 6V,Ro=10Ω
Vin=6 to 14V
mV
P-P


%
I
O1=0mA






DC
1
1
Electrical characteristics
With heat sink
1 Derating required according to the input voltage and ambient temperature.
1 Derating required according to the input voltage and ambient temperature.
Input voltage
Output voltage
Output current 1
Output current 2
Line regulation
Load regulation
Output ripple voltage
Minimum start-up time
Conversion efficiency
Input voltage
Output voltage
Output current 1
Output current 2
Line regulation
Load regulation
Output ripple voltage
Minimum start-up time
Conversion efficiency
f MHz1.5

Operation frequency
f MHz1.5

Operation frequency
●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.