Dropper Type Regulator ICs
[2-output]
SI-3101S
Features
Single input dual output <sub output (5V/0.07A), main output (5V/0.4A)>
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 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
(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)
V
IN
V
INB
V
C
I
O1
I
O2
P
D1
40
–13
*
6
V
IN
0.07
*
0.4
18
1.5
–40 to +125
–40 to +115
–40 to +125
5.5
66.7
1
V
V
V
A
A
W
W
ºC
ºC
ºC
ºC/W
ºC/W
Stand-alone without heatsink
With infinite heatsink
Stand-alone without heatsink
1
2
3
4
5
0.45
P1.7
±0.7
• 4 = 6.8
±0.7
3.9
+0.2
–0.1
One minute
(4.3)
8.2
±0.7
*
1
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
V
IN
1
OCP
TSD
DRIVE
DET
ERR
REF
(8.0)
Symbol
Ratings
Unit
Conditions
5.0
±0.6
(17.9)
a
V
O1
4
Electrical Characteristics
Ratings
Parameter
Input voltage
CH1
Output voltage
CH2
Channel-channel voltage difference
(V
O1
—V
O2
)
Dropout voltage
CH1
CH2
Line regulation
CH1
CH2
Load regulation
CH1
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)
5
V
O2
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
min
6
*
2
4.80
4.80
–0.1
typ
max
35
Unit
V
V
V
V
V
V
mV
mV
mV
mV
dB
dB
I
O
=0.05A
I
O
=0.3A
Conditions
OCP
DRIVE
OVP
*
1
DET
ERR
5.00
5.00
5.20
5.20
0.1
1.0
1.0
2
V
C
CONT
3
GND
I
O1
=0 to 0.05A
I
O2
=0 to 0.3A
I
O1
0.05A
I
O2
0.4A
V
IN
=6 to 18V, I
O
=0.05A
V
IN
=6 to 18V, I
O
=0.3A
I
O1
=0 to 0.05A
I
O2
=0 to 0.3A
f =100 to 120Hz
f =100 to 120Hz
I
O1
=0A, V
C
=0V
10
10
30
40
54
54
30
30
70
70
Standard Circuit Diagram
D
3
D
2
1
D
1
2
V
C
SI- 3101S
3
4
V
O1
GND
C
O1
5
V
O2
V
IN
0.8
0.1
*
3
mA
A
A
+
C
IN
+
+
C
O2
CH1
CH2
Output ON
0.5
*
3
4.2
3.2
4.5
3.5
4.8
3.8
100
–100
35
*
4
V
V
µA
µA
V
V
C
=4.8V
V
C
=3.2V
C
O1
:
C
O2
:
*1 C
IN
:
Output control current
Output OFF
Overvoltage protection starting
voltage
Thermal protection starting
temperature
T
TSD
130
*
5
ºC
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.)
Notes:
*1. Since P
D
(max)
= (V
IN
– V
O
) • I
O1
+ (V
IN
– V
O2
) • I
O2
= 18 (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
= 0.05A or I
O2
= 0.3A) 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.
12
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