qSI-3000R
Series
SI-3000R Seires
5-Terminal, Multi-Function, Full-Mold, Low Dropout Voltage Dropper Type with Reset Function
sFeatures
• Reset signal output (As the output rises it sends a reset signal to the micro-
computer to secure normal operation of the system. As the output drops a
reset signal is also sent out to protect the system.)
• Reset signal detection output voltage level Voth is 92% of output voltage in
the standard specification. Models with different setting values for different
needs are scheduled to be added to the series.
• Delay time for reset signal can be adjusted freely by external capacitor.
• Compact full-mold package (equivalent to TO220)
• Output current: 1.5A
• Low dropout voltage :V
DIF
≤1V
(at I
O
=1.5A)
Applicable to battery driven equipment with built-in microcomputer.
• Built-in droping type overcurrent, overvoltage, thermal protection circuits
• Low circuit current I
D
=typ.1.5mA(I
O
=0A)
sApplications
• Microcomputer-controlled equipment
• Battery-driven micro-computer-controlled equipment
sAbsolute
Maximum Ratings
Parameter
DC Input Voltage
Voltage of Rest Signal Output Terminal
DC Output Current
Power Dissipation
Junction Temperature
Ambient Operating Temperature
Storage Temperature
Thermal Resistance (junction to case)
Thermal Resistance (junction to ambient air)
Symbol
V
IN
V
RST
I
O
P
D1
P
D2
T
j
T
OP
T
stg
R
th(j-c)
R
th(j-a)
Ratings
SI-3050R
35
V
IN
1.5
*1
18(With infinite heatsink)
1.5(Without heatsink, stand-alone operation)
–30 to +125
–30 to +105
–30 to +125
5.5
66.7(Without heatsink, stand-alone operation)
V
V
A
W
W
°C
°C
°C
°C/W
°C/W
Unit
(T
a
=25°C)
52
qSI-3000R
Series
sElectrical
Characteristics
Ratings
Parameter
Input Voltage
Output Voltage
Symbol
min.
V
IN
V
O
Conditions
V
DIF
Dropout Voltage
Conditions
Conditions
Line Regulation
Load Regulation
Ripple Rejection
Quiescent Circuit
Current
Overcurrent Protection Starting
Current (Drooping Type)
Limited Current at Overcurrent
Protection Operation
DLY
Threshold
Terminal Source
Reset Threshold Voltage Level
(Voth: Threshold Output Voltage)
Reset Threshold Voltage Hysteresis
H-level Output Voltage
V
RST
L-level Output Voltage
Terminal*4 Sink Current at H level
Source Current at L level
∆V
oth
V
RSTH
V
RSTL
I
RSTH
I
RSTL
–16
50
V
CC
–1
100
∆V
OLINE
Conditions
∆V
OLOAD
Conditions
R
REJ
Conditions
I
q
Conditions
I
S1
Conditions
I
S2
Conditions
V
DLyth
I
DLY
V
oth
/V
O
2.7
25
90
1.6
V
IN
=8V
2.9
35
92
1.6
V
IN
=8V
V
IN
=8V, I
O
=0 to 1.5A
54
V
IN
=8V, f=100 to 120H
Z
1.5
V
IN
=8V, I
O
=0A
V
IN
=6 to 15V, I
O
=1.0A
I
O
≤1.0A
6
*2
4.80
5.00
V
IN
=8V, I
O
=1.0A
SI-3050R
typ.
(T
a
=25°C unless otherwise specified)
Unit
max.
30
*1
5.20
0.5
V
1.0
V
V
I
O
≤1.5A
30
100
mV
mV
dB
5.0
mA
A
A
3.1
45
94
150
0.8
–20
V
µA
%
mV
V
V
µA
mA
*1: V
IN(max)
and I
O(max)
are restricted by the relation P
D(max)
=(V
IN
-V
O
)•I
O
=18(W).
*2: Refer to the dropout voltage.(Refer to Setting D
C
Input Voltage on page 7.)
*3: I
S
1 is specified at –5(%) drop point of output voltage V
O
on the condition that V
IN
=8V, I
O
=1.0A.
*4: Reset signal output terminal V
RST
is an open-collector output. Use a pull-up resistor when connecting it to a logic circuit.
53
qSI-3000R
Series
sReset
Signal Output Timing Chart
V
IN
Input Voltage
V
O
+V
DIF
GND
V
oth
V
O
V
oth
Output Voltage
GND
V
DLY
Voltage Across
Delay Capacitor
V
DLY
th
The delay time
tDLY
of the reset signal can
be calculated from the following formula:
t
DLY
=
V
RSTH
O(V)
Reset Signal Output
V
DLYth
×
C
DLY
I
DLY
V
RSTL
O(V)
Vo drops for a period
less than t
RESET
(min)
*I
DLY
is the current flowing from the
DLY
terminal shown in the standard connec-
tion circuit diagram.
t
DLY
t
DLY
t
RESET (mim.)
sOutline
Drawing
φ
3.2
±0.2
0.5
(unit:mm)
10.0
±0.2
4.2
±0.2
±0.2
2.8
4.0
±0.2
7.9
±0.2
(17.9)
Part Number
Lot Number
16.9
±0.3
2.6
±0.1
(2.0)
±0.6
Plastic Mold Package Type
Flammability: UL94V-0
Weight: Approx. 2.3g
0.95
±0.15
0.85
–0.1
(4.6)
+0.2
5.0
Terminal Connections
q
GND
w
DELAY
e
V
O
r
Rest Signal output
t
V
IN
0.45
–0.1
P1.7
±0.7
×4=6.8
±0.7
+0.2
3.9
±0.7
(4.3)
8.2
±0.7
1 2 3 4 5
Forming No. 1101
54
(8.0)
qSI-3000R
Series
sBlock
Diagram
T
r1
5
3
MIC
Reg.
Drive
OCP, OVP
Amp.
Reset
4
TSD
V
REF
1
2
sStandard
External Circuit
*
4
D
1
5
SI-3050R
3
C
0
*1 C
1
*
3
4
: Output capacitor (Approx. 200µF)
: Oscillation prevention capacitor (C
1
: Approx. 47µF)
The distance between terminals No.5 (V
IN
) and No.1 (GND)
must be made as short as possible. If the input line is induc-
tive or in the case of long wiring, a capacitor of approxi-
mately 0.33µF with superior high frequency characteristics
must be connected in parallel. Tantalum capacitors are rec-
R
1
C
0
+
*
1
C
1
DC Input
V
O
+
1
2
Reset Signal
Output Terminal
DC Output
V
O
*
4
D
2
*
2
C
DLY
*2 C
DLY
*3 R
1
*4 D
1
D
2
ommended for C
1
and C
0
, particularly at low temperatures.
: Delay capacitor (reset output)
: Pull-up resistor (300Ω or above)
: Protection diodes
These diodes are required for protection against reverse
biasing of the input and output. Sanken EU2Z is recom-
mended.
sT
a
-P
D
Characteristics
20
Infinite heatsink
With Silicon Grease
Heatsink: Aluminum
Power Dissipation P
D
(W)
15
200×200×2mm (2.3°C/W)
10 100×100×2mm (5.2°C/W)
75×75×2mm (7.6°C/W)
5
Without heatsink
0
–30
0
25
50
75
100
Ambient Temperature T
a
(°C)
P
D
=I
O
•[V
IN
(mean)–V
O
]
55
qSI-3000R
Series
sTypical
Characteristics
(T
a
=25°C)
I
O
vs. V
DIF
Characteristics
0.8
Temperature Coefficient of Output Voltage
5.06
5.04
V
IN
=8V
l
O
=10mA
Rise Characteristics
6
5
Dropout Voltage V
DIF
(V)
0.6
Output Voltage V
O
(V)
Output Voltage V
O
(V)
5.02
5.00
4.98
4.96
4.94
4.92
4
l
O
=0A
0.5A
1A
1.5A
0.4
3
2
0.2
1
0
0
0.5
1.0
1.5
4.90
–40 –20
0
20
40
60
80 100 120 140
0
0
1
2
3
4
5
6
7
8
Output Current lo (A)
Ambient Temperature T
a
(°C)
Input Voltage V
IN
(V)
Circuit Current
25
Overcurrent Protection Characteristics
6
Thermal Protection Characteristics
6
V
IN
=8V
l
O
=10mA
8V
Ground Current I
G
(mA)
Output Voltage V
O
(V)
20V
15V
20
5
5
Output Voltage Vo (V)
V
IN
=30V
25V
4
4
15
6V
3
3
10
l
O
=1
.5A
1A
2
2
5
0.5A
0A
0
0
5
10
15
20
25
30
1
1
0
0
0.5
1
1.5
2
2.5
3
0
60
80
100
120
140
160
180
Input Voltage V
IN
(V)
Output Current l
O
(A)
Case Temperature T
C
(°C)
Note on Thermal Protection:
The thermal protection circuit is intended for pro-
tection against heat during instantaneous short-
circuiting. Its operation is not guaranteed for short-
circuiting over extended periods of time.
Reset Output vs. V
O
Characteristics
6
V
IN
=8V l
O
=0A
R
L
=510Ω
5
Reset Output vs. DLY Terminal Voltage Characteristics
6
V
IN
=8V l
O
=0A
R
L
=510Ω
5
Reset Signal Delay Time tDLY(sec)
10
V
IN
=8V
l
O
=0A
1
Reset Output Voltage V
RST
(V)
Reset Output Voltage V
RST
(V)
4
4
Delay Time t
DLY
(sec.)
100m
3
3
10m
2
2
1m
1
1
100µ
10µ
1p
0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
10p
100p 1000p 0.01µ 0.1µ
1µ
10µ
Output Voltage V
O
(V)
DLY Terminal Voltage V
DLY
(V)
Delay Capacitor Capacitance C
DLY
(F)
56
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