BP5226-18 Datasheet, PDF (1/3 Pages) Rohm – Step-down DC/DC converter

Step-down DC/DC converter
18V/500mA output type
BP5226-18
Absolute Maximum Ratings
Parameter
Input voltage
Operating temperature range
Storage temperature range
Symbol
VIN
Topr
Tstg
Maximum surface temperature Tcmax
Maximum output current
Iomax
Limits
Unit
Conditions
V DC
°C Refer to derating curve
°C
°C ^{(Ambient temperature +}
the module self-heating) Tcmax
mApk
Dimensions(Unit : mm)
Electrical Characteristics
Parameter
Symbol Min.
Input voltage range
20
Output voltage
17.0
Output current
0
Line regulation
−
Load regulation
−
Output ripple voltage
−
CTL pin OFF voltage
3.1
CTL pin ON voltage
−
CTL terminal pull-up resistance
135
Power conversion efficiency
85
Typ. Max.
Unit
Conditions
DC
Vi=34V, Io=500mA
Vi=34V
Vi=20 to 46V, Io=500mA
Vi=34V, Io=0 to 500mA
Vi=34V, Io=500mA
SW1 OFF (VoOFF)
SW1 ON (VoON)
Vi=34V, Io=500mA
Application circuit
BP5226-18
BP5226-18
AC24V
D1
121110 7 5 3 2 1
FUSE
C1
L1
Ctl
Io
C2 Vo
Pin No.
Function
1 Output terminal:Vo(18V)
2 CTL terminal
3 Power inductor terminal
4 Skip
5 Power inductor terminal
6 Skip
7 COMMON
8 Skip
9 Skip
10 Input terminal
11 N.C.
12 Input terminal
Be sure to use fuse for safety.
For actual usage, Please kindly evaluate and confirm our part mounted in your product,
Especially, Please make sure to confirm the load current does not exceed Max. rated current
by using the current probe.
Input terminal is 10 and 12.
External components setting
FUSE: fuse
C1: Input capacitor
Please make sure to use quick acting (1.8A)
C2: Output capacitor
L1: Power inductor
Above 25V, 100µF to 1000µF, Low impedance
D1: Diode
Above 60V, current:above 1.0A
Derating Curve
Derating Curve
600
500
400
300
Operation Range
200
100
0
-30 -20 -10 0 10 20 30 40 50 60 70 80 90
Ambient Temperature Ta(°C)
Conversion Efficiency
Conversion Efficiency
(Ta=25°C, Vi=34V)
100
80
60
40
20
0
0
100 200 300 400 500
Output Current Io(mA)
Load Regulation
Load Regulation
(Ta=25°C, Vi=12V)
20.0
18.0
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0
0 100 200 300 400 500 600 700 800
Output Current Io(mA)