1-1-1 Linear Regulator ICs
SI-3000KS Series
Surface-Mount, Low Current Consumption, Low Dropout Voltage Linear Regulator ICs
■Features
• Compact surface-mount package (SOP8)
• Output current: 1.0 A
• Compatible with low ESR capacitor
• Low circuit current at output OFF Iq
≤
350
µ
A
(I
O
= 0 A, V
C
= 2 V)
• Low current consumption Iq (OFF)
≤
1
µ
A (V
C
= 0 V)
• Low dropout voltage V
DIF
≤
0.6 V (I
O
= 1 A)
• 3 types of output voltages (2.5 V, 3.3 V, and
variable type) available
• Output ON/OFF control terminal voltage
compatible with LS-TTL
• Built-in drooping-type-overcurrent and thermal
protection circuits
■Absolute
Maximum Ratings
Parameter
DC Input Voltage
Output Control Terminal Voltage
DC Output Current
Power Dissipation
Junction Temperature
Storage Temperature
Thermal Resistance (Junction to Ambient Air)
Thermal resistance (Junction to Lead (pin 7))
Symbol
V
IN*1
V
C
I
O*1
P
D*1, *2
T
j
T
stg
Ratings
17
V
IN
1.0
0.76
–40 to +125
–40 to +125
130
22
Unit
V
V
A
W
°C
°C
°C/W
°C/W
(T
a
=25°C)
θ
j-a*
θ
j-l
*1: V
IN
(max) and I
O
(max) are restricted by the relation PD = (V
IN
- V
O
)
×
I
O
. Please calculate these values referring to the
Copper laminate area vs. Power dissipation data as shown hereinafter.
*2: When mounted on a glass epoxy board of 1600 mm
2
(copper laminate area 2%).
■Applications
• Local power supplies
• Battery-driven electronic equipment
■Electrical
Characteristics
Ratings
Parameter
Input Voltage
Output Voltage
(Reference voltage V
ADJ
for SI-3012KS)
Symbol
V
IN
V
O
(V
ADJ
)
Conditions
V
DIF
Dropout Voltage
Conditions
Conditions
Line Regulation
Load Regulation
Quiescent Circuit Current
Circuit Current at Output OFF
Temperature Coefficient of
Output Voltage
Ripple Rejection
Overcurrent Protection
Starting Current
*2
Control Voltage (Output ON)
*3
Control Voltage (Output OFF)
V
C
Terminal
Control Current (Output ON)
Control Current (Output OFF)
∆V
OLINE
Conditions
∆V
OLOAD
Conditions
I
q
Conditions
I
q
(OFF)
Conditions
∆V
O
/∆T
a
Conditions
R
REJ
Conditions
I
S1
Conditions
V
C
, IH
V
C
, IL
I
C
, IH
Conditions
I
C
, IL
Conditions
–5
0
–5
2.0
0.8
40
V
C
=2V
0
V
C
=0V
–5
1.2
V
IN
=3.3V (V
O
=2.5V)
2.0
0.8
40
V
IN
=3.3V, V
C
=0V
±0.3
T
j
=0 to 100°C (V
O
=2.5V)
55
V
IN
=3.3V, f=100 to 120H
Z
(V
O
=2.5V)
1.2
V
IN
=3.3V
2.0
I
O
=0.5A (V
O
=2.5V)
0.6
I
O
=1A (V
O
=2.5V)
10
V
IN
=3.3 to 8V, I
O
=10mA (V
O
=2.5V)
40
V
IN
=3.3V, I
O
=0 to 1A (V
O
=2.5V)
350
V
IN
=3.3V, I
O
=0A, V
C
=2V, R2=24kΩ
1
V
IN
=3.3V, V
C
=0V
±0.3
T
j
=0 to 100°C
55
V
IN
=3.3V, f=100 to 120H
Z
1.2
V
IN
=3.3V, I
O
=0A, V
C
=2V
1
V
IN
=3.3V, I
O
=0 to 1A
350
V
IN
=3.3 to 8V, I
O
=10mA
40
I
O
=1A
10
SI-3012KS (variable type)
min.
2.4
1.24
1.28
V
IN
=3.3V, I
O
=10mA
0.3
I
O
=0.5A
0.6
1.32
typ.
max.
min.
*1
(T
a
=25°C, V
c
=2 V unless otherwise specified)
SI-3025KS
typ.
2.50
V
IN
=3.3V, I
O
=10mA
0.4
I
O
=0.5A
0.6
I
O
=1A
15
V
IN
=5 to 10V, I
O
=10mA
50
V
IN
=5V, I
O
=0 to 1A
350
V
IN
=5V, I
O
=0A, V
C
=2V
1
V
IN
=5V, V
C
=0V
±0.3
T
j
=0 to 100°C
55
V
IN
=5V, f=100 to 120H
Z
V
IN
=5V
0.8
40
0
mV
mV
max.
2.55
min.
*1
SI-3033KS
typ.
3.300
V
IN
=5V, I
O
=10mA
0.4
max.
Unit
V
3.366
V
2.45
3.234
V
µ
A
µ
A
mV/
°C
dB
A
V
µ
A
µ
A
*1: Refer to the Dropout Voltage parameter.
*2: The I
s1
is specified at the 5% drop point of output voltage V
O
on the condition that V
IN
= V
O
+ 1 V, and I
O
= 10 mA.
*3: Output is OFF when the output control terminal V
C
is open. Each input level is equivalent to LS-TTL level. Therefore, the device can be driven directly by LS-TTLs.
14
ICs
SI-3000KS Series
■External
Dimensions (SOP8)
5.1
±0.4
1.27
0.4
±0.1
0.15
+0.1
–0.05
0.5
±0.1
(Unit : mm)
Pin Assignment
q
V
C
w
V
IN
e
V
O
r
Sence (ADJ for SI-3012KS)
t
GND
y
GND
u
GND
i
GND
Plastic Mold Package Type
Flammability: UL 94V-0
Product Mass: Approx. 0.1 g
8
7
6
5
4.4
±0.2
1
2
3
4
0.10
0.4
±0.1
0.12 M
■Block
Diagram
●SI-3012KS
V
IN
2
3 V
OUT
0.05
±0.05
1.55
±0.15
1.5
±0.1
0~
0.995max.
10
1.27
°
6.2
●SI-3025KS,
SI-3033KS
V
IN
2
3 V
OUT
4
V
C
1
-
+
4 ADJ
TSD
8
7
REF
6
5 GND
V
C
1
-
+
Sense
TSD
8
7
REF
6
5 GND
■Typical
Connection Diagram
●SI-3012KS
V
IN
2
+
●SI-3025KS,
SI-3033KS
V
O
3
V
IN
2
V
O
3
C
O
R1
C
O
C
IN
V
C
GND ADJ
1
4
5 to 8
Load
C
IN
sense
V
C
GND 4
1
5 to 8
Load
R2
R2
R
1
, R
2
: Output voltage setting resistors
The output voltage can be set by connecting R
1
and R
2
as shown above.
The recommended value of R
2
is 24 kΩ .
C
IN
: Input capacitor (22
µ
F or larger)
C
O
: Output capacitor (22
µ
F or larger)
For SI-3000KS series, Co has to be a low ESR capacitor.
When using the electrolytic capacitor, the SI-3000KS series may oscillate at a low temperature.
R1=(V
O
–V
ADJ
)
÷
(V
ADJ
/R2)
■Reference
Data
Copper Laminate Area vs.
Thermal Resistance
140
Area of PC board : 40×40mm
1.2
Copper Laminate Area vs.
Power Dissipation
Tj=100°C Area of PC board : 40×40mm
Ta=25°C
Thermal resistance
θ
j-a (°C/W)
120
Power dissipation P
D
(W)
1
Ta=50°C
Ta=80°C
0.8
100
• Obtaining the junction temperature
Measure the temperature T
L
at the lead part of the GND
pin (pin 7) with a thermocouple, etc. Then, substitute
this value in the following formula to obtain the junction
temperature.
0.6
0.4
T
j
=P
D
× θ
j–L
+ T
L
(
θ
j–L
= 22
°
C/W)
80
60
0.2
40
10
100
Copper laminate area (mm
2
)
(GND terminal)
1000
0
10
100
Copper laminate area (mm
2
)
(GND terminal)
1000
ICs
15
qSI-3000KS
Series
sExample
of Solder Pattern Design
L
L
b2
e1
l2
e1
B
1
L
e
b
e
α
e
e
e
e
*1
B
2
Symbol
e1
e
α
β
1
β
2
L
b2
l2
Dimensions (mm)
5.72
1.27±0.15
0.2
0.2 to 0.5
0.2
0.6
0.76
L+
β
1+
β
2
GND pattern
b2
8
7
6
5
l2
(Reference value conforming to EIAJ
Standard ED-7402-1)
*1 The inner frame stage on which a monolithic IC is mounted is
directly connected to the GND pins (pins 5 through 8). By
expanding the area of the copper connected to the GND pins,
the heat radiation can be improved. It is recommended to
design the solder pattern by opening the insulation film of the
solder patterns of pins 5, 6, 7, and 8, on the wide GND
pattern as shown in Figure 1.
e1
1
2
3
4
e
e
Figure 1
e
sReference
Data
Thermal resistance vs. Copper area
140
Area of PC board : 40×40mm
1.2
Power dissipation vs. Copper area
Tj=100°C Area of PC board : 40×40mm
Ta=25°C
Thermal resistance
θ
j-a (°C/W)
120
Power dissipation P
D
(W)
1
Ta=50°C
Ta=80°C
0.8
100
0.6
0.4
80
60
0.2
40
10
100
Copper area (mm
2
)
1000
0
10
100
Copper area (mm
2
)
1000
• Calculating junction temperature
Measure the temperature TL of the lead of the GND pin (pin 7) by using a thermocouple, and substitute the
measured value into the following expression to calculate the junction temperature.
T
j
=P
D
× θ
j–L
+ T
L
(
θ
j–L
= 22
°
C/W)
qSI-3000KS
Series
sTaping
Specifications
Carrier tape
Surface resistance of em-
bossed tape: 100 kΩ maxi-
mum (among 10 pockets)
160 to 240mm
(About 25 pockets)
1,000PCS
(1,000 pockets)
160 to 240mm
(About 25 pockets)
400 to 600mm
Leader
Vacant seal section
Trailer
IC compartments
Vacant seal section
Cover tape
(Unit : mm)
4
2
8
φ
1.55
Tape draw-out direction
t=3
5.5
12
5.75
(4.75)
5.55
7.0
φ
2
2.1
6.7
Reel: Number of packed
products: 1000
Hole
Hole
B
1.5
60
°
60
°
Hole
Hole
φ
13±0.2
φ
60
φ
180
φ
R2
3
2
Hole
Hole
φ
1
0
Hole
Hole
13±0.3
15.4±1.0
Expanded view of center
2
5
φ
1
3
.5
10
Hole
4
Hole
5
30
°
11.9
Hole
10
Hole
φ
3
2
R2
φ
60
°
3
°
60
qSI-3000KS
Series
sTypical
Characteristics Examples of SI-3012KS and SI-3025KS
(T
a
=25°C) *V
out
=2.5 V for SI-3012KS (RS=24 kΩ)
Dropout voltage
1
Rise characteristics
3
Line regulation
2.54
2.52
0.8
2.50
Dropout voltage V
0.6
Output voltage V
Output voltage V
2
I
O
=0 to 1A
0.25A step
1
2.48
2.46
2.44
2.42
2.40
0
I
O
=0 to 1A
0.25A step
0.4
0.2
0
0.2
0.4
0.6
Output current A
0.8
1
0
1
2
Input voltage V
3
4
2
4
6
Input voltage V
8
10
Load regulation
2.52
Overcurrent protection characteristics
3
Input voltage vs. Quiescent current
600
I
O
=0A
V
C
=2V
2.50
2
V
IN
=3.3V
4V
5V
6V
Quiescent Current
µ
A
500
Output voltage V
2.48
V
IN
=3.3V
4V
5V
6V
8V
Output voltage V
400
2.46
300
2.44
1
200
2.42
100
2.40
0
0.2
0.4
0.6
Output current A
0.8
1
0
0.2
0.4
0.6 0.8
1 1.2
Output current A
1.4
1.6
0
2
4
6
8 10 12
Input voltage V
14
16
18
Circuit current
60
Control terminal voltage vs. Output voltage
3
Control terminal voltage vs. Control terminal current
30
25
GND current mA
I
O
=1A
Output voltage V
40
2
I
O
=0A
Control terminal current
µ
A
2
20
15
0.75A
20
0.5A
0.25A
0
2
4
Input voltage V
6
0A
8
1
10
5
0
0.5
1
1.5
Control ternimal voltage V
0
1
2
3
Control terminal voltage V
4
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