STA810M Series
sExternal
Dimensions (SIP8 [STA 8Pin])
4
±0.2
(Unit : mm)
2.3
±0.2
1.7MAX
9
±0.2
SK
a
b
(1)
STA811M
3.15
±0.5
1.2
±0.1
(Measured at
the root of pin)
2–(R1)
R-END
0.65
)
1.15
+0.2
–0.1
7×P2.54±0.1=17.78
(Measured at the root)
C1.5
±0.5
20.15
±0.3
(3.1)
0.55
+0.2
–0.1
4.3
±0.7
(Measured at
the tip)
0.7
0.7
1
2
3
4
5
6
7
8
Plan View
Pin Assignment
q
SW
OUT
w
GND
e
V
IN
r
N.C
t
GND
y
V
OS
u
ON/OFF
i
GND
sBlock
Diagram
STA811M
V
IN
C
1
+
PReg.
ON/OFF
7
+
C
3
ON/OFF
Soft
Start
Oscillator
+
Thermal
Protection
Reset
Latch &
Driver
Overcurrent
Protection
3
V
IN
SW
OUT
1
L
V
OUT
+
C
2
Di
GND
2
V
OS
6
Comparator
+
Error Amp
Reference
Voltage
GND
5,8
sTypical
Connection Diagram
L1
V
IN
3.V
IN
1.SW
6.V
OS
V
OUT
sThermal
Derating
20
18
With Infinite Heatsink
2–(R
+
C
1
7.ON/OFF
2.GND
5,8.GND
Power Dissipation P
D
(W)
STA811M
Without Insulating Sheet
With Silicone Grease
Heatsink: Alminum
16
14
12
10
8
6
50×50×2mm (17.9°C/W)
4
2
Without Heatsink (37°C/W)
25×50×2mm
(25°C/W)
100×100×2mm (11.5°C/W)
+
C
2
C
3
GND
GND
P
D
= V
O
·I
O
100
–1
ηχ
C
1
: 220
µ
F/50V
C
2
: 470
µ
F/25V
C
3
: 0.47
µ
F/10V (Only when using soft start function)
L
1
: 100
µ
H
0
–25
0
25
50
75
100
125
V
O
:
V
IN
:
I
O
:
ηχ
:
Output voltage
Input voltage
Otuput current
Efficiency (%)
Ambient Temperature T
a
(°C)
ICs
77
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