SI-8400L/8500L Series
sExternal
Dimensions (Non-package type [EI-12.5 core/EI-19 core])
SI-8400L
V
IN
y
V
IN
r
e
L
IN
12
±0.5
(Unit : mm)
SI-8500L
L
IN
r
a
b
Vo
q
14.5
±0.5
w
GND
Pin 1 marking
a. Part Number
b. Lot Number
Not encapsulated in a plastic
package
Product Mass: Approx. 5.1g
SK
10
±0.2
13.2
q w e
V
OUT
SS GND
±0.1
26
Pin1 marking
φ
0.6
4
3.7
18
(2.17)
(10.16)
4.7
φ
0.8max.
±0.6
±0.6
(7.62)
(2.19)
26
a
b
a. Part Number
b. Lot Number
Not encapsulated in a plastic
package
Product Mass: Approx. 14.5g
±0.1
18
2
sBlock
Diagram
SI-8400L
3
4
V
IN
Reg.
OSC
Reset
OCP
Latch
&
Drive
TSD
Di
1
Amp.
Amp.
SI-8500L
L
IN
L
1
1
V
O
6
V
IN
Reg.
OSC
Reset
OCP
Latch
&
Drive
TSD
Di
1
MIC
1
4
L
IN
L
1
1
V
O
MIC
1
Comp.
Comp.
V
REF
V
REF
2
GND
2
S.S.
3
GND
sTypical
Connection Diagram
V
IN
V
IN
SI-8400L
GND
2
V
OUT
L
IN
3
N.C
V
O
V
IN
V
IN
SI-8500L
S.S
2
C
3
GND
3
V
OUT
L
IN
4
N.C
GND
V
O
4
+
C
1
220
µ
F
1
+
6
+
C
1
470
µ
F
1
+
C
2
470
µ
F
GND
C
2
470
µ
F
GND
GND
C
3
is necessary only for using soft start function.
sT
a
-P
D
Characteristics
1.5
3.0
SI-8400L
SI-8500L
P
D
=V
O
•I
O
100
–1
ηχ
Power Dissipation P
D
(W)
Power Dissipation P
D
(W)
1.0
2.0
V
O
: Output voltage
I
O
: Output current
ηχ
: Efficiency (%)
The efficiency depends on the input voltage
and the output current. Therefore, obtain the
value from the efficiency graphs and substi-
tute the percentage in the formula above.
0.5
1.0
0
0
25
50
75
100
0
0
25
50
75
100
Ambient Temperature T
a
(°C)
Ambient Temperature T
a
(°C)
ICs
81
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