Dropper Type Regulator ICs
[2-output]
SI-3102S
Features
Single input dual output <sub output (5V/0.04A), main output (5V/0.1A)>
Main output can be externally turned ON/OFF (with ignition switch, etc.)
<most suitable as memory backup power supply>
Low standby current ( 0.8mA)
Low dropout voltage 1V
Built-in dropping type overcurrent, overvoltage and thermal protection circuits
TO220 equivalent 5-terminal full-mold miniature package
External Dimensions
(unit: mm)
3.2
±0.2
0.5
10.0
±0.2
4.2
±0.2
2.8
±0.2
4.0
±0.2
7.9
±0.2
16.9
±0.3
a
(2.0)
0.95
±0.15
(4.6)
0.85
–0.1
+0.2
b
2.6
±0.1
Absolute Maximum Ratings
Parameter
DC input voltage
Battery reverse connection
Output control terminal voltage
CH1
Output current
CH2
Power Dissipation
P
D2
Junction temperature
Operating temperature
Storage temperature
Junction to case thermal resistance
Junction to ambient-air thermal
resistance
Tj
T
OP
Tstg
j
-c
j
-a
(Ta=25ºC)
Symbol
V
IN
V
INB
V
C
I
O1
I
O2
P
D1
Ratings
35
–13
*
V
IN
0.04
0.1
*
22
1.8
–40 to +150
–40 to +105
–40 to +150
5.5
66.7
6
Unit
V
V
V
Conditions
0.45
+0.2
–0.1
One minute
P1.7
±0.7
• 4 = 6.8
±0.7
3.9
±0.7
(4.3)
8.2
±0.7
*
1
1
A
A
1
2
3
4
5
W
W
ºC
ºC
ºC
ºC/W
ºC/W
With infinite heatsink
Stand-alone without heatsink
1. V
IN
2. V
C
(on/off)
3. GND
4. V
O1
5. V
O2
a: Part No.
b: Lot No.
(Forming No. 1101)
Equivalent Circuit Diagram
Stand-alone without heatsink
(8.0)
5.0
±0.6
(17.9)
V
IN
1
OCP
V
O1
4
DET
ERR
REF
Electrical Characteristics
Parameter
Input voltage
CH1
Output voltage
CH2
Channel-channel voltage difference
(V
O1
—V
O2
)
Dropout voltage
CH1
CH2
CH1
Line regulation
CH2
CH1
Load regulation
CH2
CH1
Ripple rejection
CH2
Quiescent circuit current
Overcurrent protection
starting current
Output control voltage
Output OFF
Output ON
(Tj = 25ºC, V
IN
= 14V unless otherwise specified)
TSD
Symbol
V
IN
V
O1
V
O2
V
O
V
DIF1
V
DIF2
V
O LINE1
V
O LINE2
V
O LOAD1
V
O LOAD2
R
REJ1
R
REJ2
Iq
I
(S1) 1
I
(S1) 2
V
CH
V
CL
I
CH
I
CL
V
OVP
Ratings
min
6
*
4.80
4.80
–0.1
2
typ
max
30
*
1
Unit
V
V
V
V
V
V
mV
mV
mV
mV
dB
dB
I
O
= 0.04A
I
O
= 0.1A
Conditions
DRIVE
5
V
O2
5.00
5.00
5.20
5.20
0.1
1.0
1.0
OCP
DRIVE
OVP
DET
ERR
I
O1
=0 to 0.04A
I
O2
=0 to 0.1A
I
O1
0.04A
I
O2
0.1A
V
IN
= 6 to 30V, I
O
= 0.04A
V
IN
= 6 to 30V, I
O
= 0.1A
I
O1
= 0 to 0.04A
I
O2
= 0 to 0.1A
f = 100 to 120Hz
f = 100 to 120Hz
I
O1
= 0A, V
C
= 0V
2
V
C
CONT
3
GND
10
10
30
40
54
54
50
50
70
70
Standard Circuit Diagram
D
3
D
2
1
D
1
SI- 3102S
2
V
C
3
4
V
O1
GND
C
O1
5
V
O2
0.8
0.06
*
0.15
*
4.2
3.2
3
3
mA
A
A
CH1
CH2
Output ON
V
IN
4.5
3.5
4.8
3.8
100
V
V
µA
µA
V
V
C
= 4.8V
V
C
= 3.2V
+
C
IN
Output control current
Output OFF
+
+
C
O2
–100
30
*
4
151
*
5
Overvoltage protection starting
voltage
Thermal protection starting
temperature
T
TSD
ºC
Notes:
*1. Since P
D
(max)
= (V
IN
– V
O
) • I
O1
+ (V
IN
– V
O2
) • I
O2
= 22 (W), V
IN
(max)
, I
O1
(max)
and I
O2
(max)
may be limited depending on
operating conditions. Refer to the Ta—P
D
curve to compute the corresponding values.
*2. Refer to the dropout voltage.
*3. I
S1
rating shall be the point at which the output voltage V
O1
or V
O2
(V
IN
= 14V, I
O1
= 0.04A or I
O2
= 0.1A) drops to –5%.
*4. Overvoltage protection circuit is built only in CH2 (V
O2
side).
*5. The indicated temperatures are junction temperatures.
*6. All terminals, except V
IN
and GND, are open.
Output capacitor (47 to 100µF, 50V)
Output capacitor (47 to 100µF, 50V)
Input capacitors (approx. 47µF).
Tantalum capacitors are recommended, for C
O1
,
C
O2
and C
IN
, especially at low temperatures.
*
2
D
1,
D
2,
D
3
: Protection diode.
Required as protection against reverse biasing
between input and output.
(Recommended diode: Sanken EU2Z.)
C
O1
:
C
O2
:
*1 C
IN
:
14
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