108
s
Features
2 regulators combined 1 package
Compact inline package
Output current (0.5A
2 output)
Output voltage of Ch2 selectable from 4 levels.
Built-in flywheel diode (Schottky barrier diode)
Requires only 7 external components (2 outputs)
Phase correction and output voltage adjustment performed internally
Built-in reference oscillator (125kHz) - Compact choke coil can be used
due to high frequency (compared to existing Sanken product)
Built-in overcurrent and thermal protection circuits
Built-in soft start circuit (Output ON/OFF control)
s
Applications
For BS and CS antenna power supplies
For stabilization of the secondary stage of switching power supplies
Electronic equipment
s
Lineup
2-Output Separate Excitation Switching Type
Unit
V
W
W
C
C
Symbol
V
IN
P
D1
P
D2
T
j
T
stg
STA801M/802M
s
Recommended Operating Conditions
s
Absolute Maximum Ratings
q
STA801M/802M
Unit
V
A
C
Parameter
DC Input Voltage
Power Dissipation
Junction Temperature
Storage Temperature
Part Number
STA801M
STA802M
Parameter
DC Input Voltage Range
Output Current Range per Channel
Operating Temperature Range
Output Voltage (V)
Ch1
Ch2(Select one output)
5
9.0 / 11.5 / 12.1 / 15.5
9
9.1 / 11.7 / 12.1 / 15.7
Ratings
43
6.7(With infinite heatsink)
1.6(Without heatsink, stand-alone operation)
+125
40 to +125
Symbol
V
IN
I
O
T
jop
Ratings
min.
max.
Ch2 V
Omax.
+2
40
0
0.5
20
+125
109
q
STA801M/802M
s
Electrical Characteristics
(T
a
=25
C)
*Efficiency indicates the value when only one channel is active. The value can be calculated as shown below. 7.5mA is deducted for the no-load
circuit current of
Icc
at unused output.
2
=
V
O
I
O
100(%)
V
IN
(I
IN
0.0075)
Ch1
Ch2
(Select one output)
V
O
2-4
Common
Unit
V
%
mV/
C
mV
mV
V
V
V
V
%
mV/
C
mV
mV
mA
kH
Z
A
Symbol
V
O
1
Conditions
1
Conditions
V
O
/
T
a1
V
OLINE1
Conditions
V
OLOAD1
Conditions
V
O
2-1
Conditions
V
O
2-2
Conditions
V
O
2-3
Conditions
V
O
2-4
Conditions
Conditions
V
O
/
T
a
V
OLINE
Conditions
V
OLOAD
Conditions
I
CC
f
I
S1
Ratings
STA801M
STA802M
min.
typ.
max.
min.
typ.
max.
4.80
5.00
5.20
8.64
9.00
9.36
V
IN
=20V, I
O
=0.3A
V
IN
=20V, I
O
=0.3A
80
86
V
IN
=20V, I
O
=0.3A
V
IN
=20V, I
O
=0.3A
0.5
1.0
30
90
35
110
V
IN
=10 to 30V, I
O
=0.3A
V
IN
=14 to 30V, I
O
=0.3A
10
40
20
80
V
IN
=20V, I
O
=0.1 to 0.4A
V
IN
=20V, I
O
=0.1 to 0.4A
8.64
9.00
9.36
8.74
9.10
9.46
V
IN
=20V, I
O
=0.3A
V
IN
=20V, I
O
=0.3A
11.04
11.50
11.96
11.24
11.70
12.16
V
IN
=20V, I
O
=0.3A
V
IN
=20V, I
O
=0.3A
11.62
12.10
12.58
11.62
12.10
12.58
V
IN
=20V, I
O
=0.3A
V
IN
=20V, I
O
=0.3A
14.88
15.50
16.12
15.08
15.70
16.32
V
IN
=20V, I
O
=0.3A
V
IN
=20V, I
O
=0.3A
89
89
V
IN
=20V, I
O
=0.3A
V
IN
=20V, I
O
=0.3A
2.0
2.0
40
130
40
130
V
IN
=20 to 30V, I
O
=0.3A
V
IN
=20 to 30V, I
O
=0.3A
30
120
30
120
V
IN
=20V, I
O
=0.1 to 0.4A
V
IN
=20V, I
O
=0.1 to 0.4A
15
15
125
125
0.51
0.7
0.51
0.7
Parameter
Output voltage 1
Efficiency *
Temperature Coefficient of Output Voltage
Line Regulation
Load Regulation
Output voltage 2-1
Output voltage 2-2
Output voltage 2-3
Output voltage 2-4
Efficiency*
Temperature Coefficient of Output Voltage
Line Regulation
Load Regulation
No-load Circuit Current
Switching Frequency
Overcurrent Protection Starting Current
112
s
Selecting External Components
1. Inductors L
1
and L
2
(1) Suitable for switching regulators
Do not use a coil as a noise filter because it generates excess heat.
(2) Appropriate inductance
A low inductance may cause abnormal oscillation, or cause the overcurrent protection circuit to malfunction in the rated current range.
(3) Satisfying the rated current
Exceeding the rated current may generate an extremely high current to flow due to magnetic saturation.
2. Capacitors C
1
, C
2
, and C
3
(1) Satisfy the breakdown voltage and allowable ripple current
Exceeding the ratings of these capacitors or using them without derating may shorten their service lives and also cause abnormal oscillation.
(2) Low impedance (C
2
, and C
3
)
A low-impedance model is recommended for C
2
and C
3
to reduce the ripple voltage and stabilize switching. For stable operation throughout
the input voltage range, however, the DC equivalent series resistance (ESR) of C
2
and C
3
should be 0.1 ohm or less.
3. Capacitors C
4
and C
5
(1) C
4
and C
5
are soft-start capacitors.
s
Selecting Ch2 Output Voltage
When the V
O2
C
ont
terminal voltage is set to 0.5V or less, the output voltage changes to the values shown below. To switch the potential at the V
O2
C
ont
terminal, drive the open collector of the transistor. No external voltage can be applied to the terminal. Leave the terminal open when not in use
because the terminal is already pulled up in the IC. When using terminal no. 9, short it to terminal no. 10.
( ): STA802M
s
Soft Start ON/OFF Circuit
Terminal nos. 3 and 8 are soft start terminals. Connect a capacitor to the terminal to permit a soft start. Output can be turned on and off by using
the soft start terminals. Set the soft start terminal voltage to V
SSL
(0.15V) or less to stop the output. To switch the potential at the soft start terminals,
drive the open collector of the transistor. Since the discharge currents from C
4
and C
5
flow to the ON/OFF control transistor, limit the current for
protection. The SS terminal is pulled up to the power supply in the IC and no external voltage can be applied to the terminal.
9pin
10pin
STA801M
STA802M
OPEN
Low
OPEN
Low
9V
12.1V
9.1V
12.1V
11.5V
15.5V
11.7V
15.7V
STA800M
V
O2
Cont
1
9
10
7
V
O2
9V (9.1V)
12.1V (12.1V)
+
STA800M
V
O2
Cont
1
10
7
V
O2
11.5V (11.7V)
15.5V (15.7V)
+
STA800M
S.S.
C
4
, C
5
3 or 8
+
STA800M
Soft start
Soft start +V
O
ON/OFF
S.S.
C
4
, C
5
3 or 8
+
V
O2
Cont terminal
(1 pin)
V
O2
sensing
terminal
V
O2
output voltage
Low : 0.5V or less
q
STA801M/802M
113
s
Typical Characteristics
P
D
Characteristics(Ch1:5V)
Overcurrent Protection Characteristics(Ch1:5V)
Rise Characteristics(Ch2:9V)
Efficiency Characteristics(Ch2:9V)
P
D
Characteristics(Ch2:9V) Temperature Characteristics(Ch1:5V, Ch2:9V)
STA801M
Load Regulation(Ch1:9V)
P
D
Characteristics(Ch1:9V)
P
D
Characteristics(Ch2:15.7V)
6
4
2
0
0
5
10
15
20
Input Voltage V
IN
(V)
Output Voltage V
O
(V)
0.3A
I
O
=0A
0.5A
5.1
5.0
4.9
0
0
0.1
0.2
0.3
0.4
0.5
Output Current I
O
(A)
Output Voltage V
O
(V)
V
IN
=40V
20V
10V
7V
100
80
60
40
0
0
0.1
0.2
0.3
0.4
0.5
Output Current I
O
(A)
Efficiency (%)
V
IN
=7V
20V
30V
40V
0.8
0.6
0.4
0.2
0
0
0.1
0.2
0.3
0.4
0.5
Output Current I
O
(A)
Power Dissipation P
D
(W)
30V
7V
V
IN
=40V
20V
6
4
2
0
0
0.2
0.4
0.6
0.8
1.0
Output Current I
O
(A)
Output Voltage V
O
(V)
V
IN
=7V
20V
40V
100
80
60
40
0
0
0.1
0.2
0.3
0.4
0.5
Output Current I
O
(A)
Efficiency (%)
20V
30V
V
IN
=11V
40V
0.8
0.6
0.4
0.2
0
0
0.1
0.2
0.3
0.4
0.5
Output Current I
O
(A)
Power Dissipation P
D
(W)
30V
11V
V
IN
=40V
20V
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0.1
0.2
0.3
0.4
0.5
Output Current I
O
(A)
Power Dissipation P
D
(W)
20V
30V
V
IN
=40V
17.7V
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0.1
0.2
0.3
0.4
0.5
Output Current I
O
(A)
Power Dissipation P
D
(W)
30V
20V
11V
V
IN
=40V
9.1
9.0
8.9
0
0
0.1
0.2
0.3
0.4
0.5
Output Current I
O
(A)
Output Voltage V
O
(V)
V
IN
=40V
30V
20V
11V
160
140
120
100
80
0
5.6
5.4
5.2
5.0
4.8
0
9.6
9.4
9.2
9.0
8.8
0
40
20
0
20
40
60
80
100
120
f
Ambient Temperature T
a
(
C)
Oscillation Frequency f (kHz)
Output Voltage V
O
(V)
(V
IN
=20V, I
O
=0.3A) ch1 ch2
Efficiency (%)
V
O
ch2 9V
V
O
ch1 5V
ch2 9V
ch1 5V
STA802M
Rise Characteristics(Ch1:5V)
Load Regulation(Ch1:5V)
Efficiency Characteristics(Ch1:5V)
(T
a
=25
C)
q
STA801M/802M
12
8
4
0
0
5
10
15
20
Input Voltage V
IN
(V)
Output Voltage V
O
(V)
I
O
=0A
0.3A
0.5A
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