STA801M

1-1-3 DC/DC Converter ICs
STA801M 2-Output Separate Excitation Step-down Switching Mode
■Features
■Lineup
• 2 regulators combined in 1 package
Output Voltage (V)
Part Number
• Compact inline package
Ch1
Ch2(Select one output)
5
9.0 / 11.5 / 12.1 / 15.5
STA801M
• Output current (0.5A × 2 outputs)
• Output voltage of Ch2 selectable from 4 levels
■Absolute Maximum Ratings
• Built-in flywheel diode (Schottky barrier diode)
• Requires only 7 discrete components (2
outputs)
Parameter
DC Input Voltage
• Internally-adjusted phase corrections and output
voltages
• Built-in reference oscillator (125kHz) - Enables
to downsize a choke-coil due to IC's high
oscillating frequency. (Compared with conventional Sanken devices)
Power Dissipation
Symbol
Ratings
VIN
43
Unit
V
PD1
6.7(With infinite heatsink)
W
PD2
1.6(Without heatsink, stand-alone operation)
W
Junction Temperature
Tj
+125
°C
Storage Temperature
Tstg
–40 to +125
°C
• Built-in overcurrent and thermal protection circuits
• Built-in soft start circuits (Output ON/OFF available)
■Applications
• For BS and CS antenna power supplies
• For stabilization of the secondary stage of switching power supplies
• Electronic equipment
■Recommended Operating Conditions
Parameter
Ratings
Symbol
min.
max.
Unit
DC Input Voltage Range
VIN
Ch2 VOmax.+2
40
Output Current Range per Channel
IO
0
0.5
A
Tjop
–20
+125
°C
Operating Temperature Range
V
■Electrical Characteristics
(Ta=25°C)
Ratings
Parameter
STA801M
Symbol
min.
Output voltage 1
Ch1
Efficiency *
Temperature Coefficient of Output Voltage
Line Regulation
Load Regulation
Output voltage 2-1
Ch2
(Select one output)
Output voltage 2-2
Output voltage 2-3
Output voltage 2-4
VO2-4
Efficiency*
Temperature Coefficient of Output Voltage
Line Regulation
Load Regulation
Common
No-load Circuit Current
Oscillation Frequency
Overcurrent Protection Starting Current
VO1
4.80
Conditions
η1
V
%
±0.5
30
Conditions
mV/°C
90
mV
VIN=10 to 30V, IO=0.3A
∆VOLOAD1
10
Conditions
40
mV
VIN=20V, IO=0.1 to 0.4A
8.64
Conditions
9.00
9.36
V
VIN=20V, IO=0.3A
11.04
Conditions
11.50
11.96
V
VIN=20V, IO=0.3A
11.62
Conditions
VO2-4
5.20
80
∆VOLINE1
VO2-3
5.00
VIN=20V, IO=0.3A
∆VO/∆Ta1
VO2-2
max.
VIN=20V, IO=0.3A
Conditions
VO2-1
Unit
typ.
12.10
12.58
V
VIN=20V, IO=0.3A
14.88
Conditions
15.50
16.12
V
VIN=20V, IO=0.3A
η
89
Conditions
%
VIN=20V, IO=0.3A
∆VO/∆Ta
±2.0
∆VOLINE
40
Conditions
mV/°C
130
mV
VIN=20 to 30V, IO=0.3A
∆VOLOAD
30
Conditions
120
VIN=20V, IO=0.1 to 0.4A
15
mA
f
125
kHZ
IS1
0.51
0.7
* 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
output.
η=
58
VO•IO
VIN•(IIN–0.0075)
ICs
× 100(%)
mV
ICC
A
Icc at unused
2
STA801M
■External Dimensions (SIP10 [STA 10Pin])
(Unit : mm)
9±0.2
3.15±0.5
(1)
4±0.2
(3.1)
1.15 +0.2
–0.1
2–(R0
.65)
R-END
0.55+0.2
–0.1
1.2±0.1
2–(R1)
9×P2.54±0.5=22.86±1
Pin Assignment
q VO2 Cont
w VOS1
e SS1
r SWOUT1
t GND
y VIN
u SWOUT2
+0.2
0.55 –0.1
4.3±0.7
(Measured at
the tip)
(Measured at the tip)
25.25±0.3
C1.5±0.5
i SS2
o VOS2–2
!0 VOS2–1
Plastic Mold Package Type
Flammability: UL94V-0
Product Mass: Approx. 2.5g
1 2 3 4 5 6 7 8 9 10
■Block Diagram
VIN 6
4 SWOUT1
P.Reg.
OCP
SS1 3
+
PWM
–
PWM
Logic
Drive
2 VOS1
+
Amp.
–
PWM
OSC
Vref
TSD
f/4
Reset
7 SWOUT2
OCP
PWM
Logic
SS2 8
10 VOS2 –1
Drive
+
PWM
–
9 VOS2 –2
VO2 Cont 1
+
Amp.
–
GND 5
Vref
■Typical Connection Diagram
STA800M
6
VIN
+
SWOUT1
VIN
+
STA801M
9
+
Vo2
9v
10
7
STA801M
+
Vo2
11.5v
10
C2 +
Ch 1
C4
330µF
VOS1
1
12.1V
Vo2Cont
1
15.5V
Vo2Cont
2
0.47µ F
8
Open:ON
Low :OFF
7
VO1
5V:100 µ H
C1
220µF
3 SS1
Open:ON
Low :OFF
Selection of connection method and output for VOS2-1 and VOS2-2 of Channel 2
L1
4
SWOUT2
SS2
C5
+ 0.47µ F
VO2 Cont
1
GND
5
L2
7
VO2
150 µ H
Ch 2
GND
VOS2
–2
+
VO2Cont Pin
C3
330µF
10
Or
Open
Low
9V
11.5V
12.1V
15.5V
VO2 Sensing Pin
VOS2
–1 9
Pin 9
Pin 10
■Ta-PD Characteristics
7
Power Dissipation PD (W)
6
With Infinite Heatsink
5
4
3
2
Without Heatsink
1
0
–30
0
25
50
75
100
125
Ambient Temperature Ta (°C)
ICs
59