SI-8400L/8500L Series
■External Dimensions (Non-package type [EI-12.5 core/EI-19 core])
(Unit : mm)
SI-8400L
SI-8500L
VIN
y
LIN
r
e LIN
V
IN
r
q
w GND
14.5±0.5
Vo
Not encapsulated in a plastic
package
Not encapsulated in a plastic
package
SK
Pin 1 marking
Product Mass: Approx. 5.1g
Product Mass: Approx. 14.5g
q
w
e
VOUT SS GND
26±0.1
Pin1 marking
φ
0.8max.
(10.16)
(2.17)
(7.62)
(2.19)
φ
0.6
2
4
18
■Block Diagram
SI-8400L
SI-8500L
3
LIN
4
LIN
L1
1
L1
4
6
1
MIC1
MIC
1
VIN
VO
V
IN
VO
Reg.
OSC
OCP
Reg.
OSC
OCP
Latch
Reset
Latch
&
Drive
Reset
&
Drive
Comp.
Comp.
TSD
TSD
Di1
Di1
Amp.
Amp.
VREF
V
REF
2
GND
S.S.
2
3
GND
■Typical Connection Diagram
VOUT
VIN
VIN
VO
VOUT
VIN
VO
VIN
SI-8400L
SI-8500L
4
1
6
1
GND
2
LIN
3
S.S GND
LIN
+
+
+
+
C1
220µF
C2
470µF
2
3
4
C1
µ
C2
470 F
µ
470 F
N.C
C3
N.C
GND
GND
GND
GND
C3 is necessary only for using soft start function.
■Ta-PD Characteristics
3.0
2.0
1.0
0
100
1.5
PD=VO•IO
–1
SI-8400L
SI-8500L
ηχ
VO :Output voltage
IO :Output current
ηχ :Efficiency (%)
1.0
0.5
0
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
25
50
75
100
0
25
50
75
(°C)
100
Ambient Temperature T
a
(°C)
Ambient Temperature T
a
ICs
55
ETC [ ETC ]
