qSTR9000
Series
STR9000 Series
5-Terminal, Low Dropout Voltage Dropper Type
sFeatures
•
•
•
•
•
•
5-terminal regulator with two screw mount package
Output current: 4.0A
Low dropout voltage :V
DIF
≤1V
(at I
O
=4A)
Fine adjustment of output voltage
Output ON/OFF control
Built-in foldback overcurrent protection circuits
sApplications
• For stabilization of the secondary stage of switching power supplies
• Electronic equipment
sAbsolute
Maximum Ratings
Parameter
DC Input Voltage
DC Output Current
Power Dissipation
Junction Temperature
Ambient Operating Temperature
Storage Temperature
Thermal Resistance (junction to case)
Symbol
V
IN
I
O
P
D1
P
D2
T
j
T
op
T
stg
R
th(j-c)
Ratings
STR9005
25
4.0
75(T
C
=25°C)
3.2(Without heatsink, stand-alone operation)
–30 to +125
–20 to +100
–30 to +125
1.25
STR9012/9015
30
Unit
V
V
W
W
°C
°C
°C
°C/W
(T
a
=25°C)
sElectrical
Characteristics
Ratings
Parameter
Input Voltage
Output Voltage
Symbol
min.
V
IN
V
O
Conditions
V
DIF
Dropout Voltage
Conditions
1.0
Conditions
Line Regulation
Load Regulation
Temperature Coefficient of Output Voltage
Ripple Rejection
Overcurrent Protection
Starting Current
Output ON/OFF Control Voltage
(Voltage between terminal No.3 and 5)
Voltage with Output Off
∆V
OLINE
Conditions
∆V
OLOAD
Conditions
∆V
O
/∆T
a
R
REJ
Conditions
I
S1
Conditions
V
O
(ON)
V
O
(OFF)
V
O
Conditions
V
IN
=8V, I
O
=0A
2.0
0.5
V
IN
=15V, I
O
=0A
4.1
V
IN
=8V
0.6
2.0
0.5
V
IN
=20V, I
O
=0A
4.1
V
IN
=16V
0.6
2.0
0.5
10
40
±0.5
54
30
100
V
IN
=6 to 15V, I
O
=2.0A
V
IN
=8V, I
O
=0 to 3.0A
I
O
=4.0A
30
80
±1.5
54
f=100 to 120H
Z
4.1
V
IN
=20V
0.6
80
200
50
100
±1.5
54
100
200
6
4.9
5.0
V
IN
=8V, I
O
=2.0A
0.5
I
O
=2.0A
1.0
1.0
STR9005
typ.
max.
15
5.1
min.
13
11.8
12.0
V
IN
=16V, I
O
=2.0A
0.5
STR9012
typ.
max.
25
12.2
min.
16
14.8
15.0
V
IN
=20V, I
O
=2.0A
0.5
STR9015
typ.
max.
25
15.2
(T
a
=25°C)
Unit
V
V
V
mV
mV
mV/°C
dB
A
V
V
V
V
IN
=13 to 25V, I
O
=2.0A
V
IN
=16V, I
O
=0 to 3.0A
V
IN
=16 to 25V, I
O
=2.0A
V
IN
=20V, I
O
=0 to 3.0A
*Output is turned on when voltage between terminal No.3 and 5 is less than 0.6V, and turned off if more than 2.0V.
66
qSTR9000
Series
sOutline
Drawing
±0.3
±0.2
(unit:mm)
36.0
24.4
6.0max.
2.0
±0.2
30
°
±0.3
12.0
Part Number
21.2
Lot Number
±0.3
φ
3.2
±0.1
Plastic Mold Package Type
Flammability: UL94V-0
Weight: Approx. 14.5g
3.0
0.6
–0.1
+0.2
4.7max.
20.0min.
2.0
1.0
–0.1
+0.2
Terminal Connections
q
w
e
r
t
Output (backside of case)
Output Fine Adjustment
Output ON/OFF Control
Input
Ground
q
3.5
w
e
5.45×4
5.45
r
t
sBlock
Diagram
4
Tr
1
1
R
2
M
R
4
R
1
2
Drive
Amp.
Reg.
R
6
Protection
V
REF
Tr
2
R
7
R
5
R
3
R
8
3
5
67
qSTR9000
Series
sStandard
External Circuit
C
1
: Oscillation prevention capacitor (approx. 0.33µF)
Connection to terminal No.4 must be made as short as
possible.
C
2
: Output capacitor (47 to 100µF)
Connection to terminal No.1 must be made as short as
possible.
D
1
: Protection diode (RM1Z)
Required for protection against reverse biasing of input
and output.
Note 1: Prevention of oscillation at low temperatures
At low temperatures, oscillation may occur unless an
output capacitor with good tanδ is used. Be sure to
connect a tantalum capacitor (approx. 10µF) in par-
allel with output capacitor C
2
.
Note 2: An isolation type diode is provided from input to
ground and also from output to ground. These may
be destroyed if the device is reverse biased. In this
case, use a diode with low V
F
to protect them.
D
1
V
IN
4
DC input
3
C
1
STR9000
5
2
+
C
2
1
V
O
DC output
sT
a
-P
D
Characteristics
24
150×150×2(3.3°C/W)
Power Dissipation P
D
(W)
20
16
100×100×2(5.2°C/W)
12
75×75×2(7.6°C/W)
8
4
0
–20
Without heatsink
Without Mica
With Slicon Grease
Heatsink: Aluminum
Unit: mm
0
25
50
75
100
Ambient Temperature T
a
(°C)
68
qSTR9000
Series
External Variable Output Voltage Circuit
1. Variable output voltage with a single external resistor
Output Voltage V
O
(V)
5.3
5.2
5.1
5.0
4.9
4.8
q
Typical Characteristics of Variable Output Voltage
STR9005
(T
a
=25°C)
The output voltage of the STR9000 series may be decreased by insert-
ing a resistor between terminals No.1 (output terminal) and No.2 (out-
put fine adjustment terminals). Alternatively, the output voltage may be
increased by inserting a resistor between terminals No.2 and No.5
(ground terminal).
<Standard External Circuit>
V
IN
V
O
4
STR9000
+
3
5
2
1
R
EX
for Vo down
+
R
EX
for Vo up
Variable Output
Voltage Range
4.7
20K
50K 100K
500K
1M
5M
10M
50M
External Resistor R
EX
(Ω)
STR9012
14
(T
a
=25°C)
GND
Select either one of the external resistor.
GND
Output Voltage V
O
(V)
13
Variable Output
Voltage Range
12
11
2. Fine adjustment of output voltage
The output voltage may be finely adjusted by using terminals No.1, No.2
and No. 5 as shown in the following connections.
<Standard External Circuit>
10
9
20K
50K 100K
500K
1M
5M
10M
50M
External Resistor R
EX
(Ω)
STR9015
V
IN
V
O
4
STR9000
+
3
5
2
VR
R
2
1
Output Voltage V
O
(V)
17
(T
a
=25°C)
R
1
+
16
15
Variable Output Voltage Range
14
GND
GND
13
Note: The fine adjustment range of output voltage for the STR9000 se-
ries is
±0.5V
max for STR9012 and +1.0V/-2.0V max for STR9015.
Adjustment exceeding these values may cause start-up errors.
12
20K
50K 100K
500K
1M
5M
10M
50M
External Resistor R
EX
(Ω)
: Insertion of resistor between terminals No. 2 and No. 5
: Insertion of resistor between terminals No. 2 and No. 1
w
Typical Characteristics of Fine Output Voltage Adjustment
STR9005
(T
a
=25°C)
STR9012
14
(T
a
=25°C)
STR9015
20
(T
a
=25°C)
5.4
R
1
=150 kΩ
R
2
=150 kΩ
R
1
=100 kΩ
R
2
= 30 kΩ
13
18
R
1
=100 kΩ
R
2
= 20 kΩ
Output Voltage V
O
(V)
Output Voltage V
O
(V)
Output Voltage V
O
(V)
0
100
200
300
400
500
5.2
16
5.0
12
14
4.8
11
12
4.6
0
100
200
300
400
500
10
10 0
100
200
300
400
500
V
R
(kΩ)
V
R
(kΩ)
V
R
(kΩ)
69
qSTR9000
Series
sTypical
Characteristics
(T
a
=25°C)
I
O
vs. V
DIF
Characteristics
1.0
Temperature Coefficient of Output Voltage(STR9005)
5.04
V
IN
=8V
l
O
=10mA
Circuit Current(STR9005)
70
V
O
=5V
60
Dropout Voltage V
DIF
(V)
Ground Current l
G
(mA)
0.8
5.02
Output Voltage V
O
(V)
50
40
30
20
10
l
O
=4A
3A
2A
1A
0A
0.6
5.00
0.4
4.98
0.2
4.96
0
0
1.0
3.0
3.0
4.0
4.94
–20
0
20
40
60
80
100 120 140
0
0
5
10
15
17.5
Output Current l
O
(A)
Ambient Temperature T
a
(°C)
Input Voltage V
IN
(V)
Rise Characteristics(STR9005)
7
6
Rise Characteristics(STR9012)
15
Rise Characteristics(STR9015)
17.5
15
Output Voltage V
O
(V)
Output Voltage V
O
(V)
Output Voltage Vo (V)
5
4
l
O
=0A
3
2
1
0
1A
2A
3A
4A
10
l
O
=0A
1A
2A
3A
4A
l
O
=0A
1A
10
2A
3A
4A
5
5
0
5
10
15
20
0
0
5
10
15
20 22.5
0
0
5
10
15
20 22.5
Input Voltage V
IN
(V)
Input Voltage V
IN
(V)
Input Voltage V
IN
(V)
Overcurrent Protection Characteristics(STR9005)
7
6
Overcurrent Protection Characteristics(STR9012)
15
Overcurrent Protection Characteristics(STR9015)
17.5
15
25V
20V
=16
V
IN
Output Voltage V
O
(V)
Output Voltage V
O
(V)
5
Output Voltage V
O
(V)
20V
V
IN
25V
16V
15V
V
=13
V
V
IN
=6V
10
8V
4
3
2
1
0
10
5
5
0
1
2
3
4
5
6
7
8
0
0
1
2
3
4
5
6
7
8
9
0
0
1
2
3
4
5
6
7
8
9
Output Current l
O
(A)
Output Current l
O
(A)
Output Current l
O
(A)
70
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