SI-8033JD Datasheet

1-1-3 DC/DC Converter ICs
SI-8000JD Series
Surface-Mount, Separate Excitation Step-down Switching Mode
■Features
■Lineup
• Surface-mount package (TO263-5)
Part Number
SI-8033JD
SI-8050JD
SI-8090JD
SI-8120JD
VO(V)
3.3
5.0
9.0
12.0
• Output current: 1.5A
IO(A)
• High efficiency: 77 to 88%
• Requires only 4 discrete components
1.5
■Absolute Maximum Ratings
• Internally-adjusted phase correction and
output voltage
Parameter
• Capable of downsizing a choke-coil due to IC's
high switching frequency (125 kHz). (Compared with conventional Sanken devices)
Symbol
Ratings
Unit
DC Input Voltage
VIN
43
V
Output Current
IO
1.5
A
PD
3
W
°C
Power
• Built-in foldback-overcurrent and thermal
protection circuits
• Output ON/OFF available (Circuit current at
output OFF: 200µA max)
Dissipation*
Junction Temperature
Tj
+125
Storage Temperature
Tstg
–40 to +125
°C
Thermal Resistance (Junction to Case)
θ j-c
3
°C/W
Thermal Resistance (Junction to
Ambient Air)
θ j-a
33.3
°C/W
Conditions
When mounted on glass-epoxy board 40 × 40 mm (copper
area 100%)
When mounted on glass-epoxy board 40 × 40 mm (copper
area 100%)
*: Limited by thermal protection circuit
• Soft start available by ON/OFF pin Conditions
■Applications
• Power supplies for telecommunication equipment
• Onboard local power supplies, etc.
■Recommended Operating Conditions
Ratings
Parameter
Symbol
DC Input Voltage Range
SI-8033JD
SI-8050JD
SI-8090JD
SI-8120JD
VIN1
5.3 to 40
7 to 40
11 to 40
14 to 40
VIN2
6.3 to 40
8 to 40
12 to 40
15 to 40
DC Output Current Range*
Unit
Conditions
IO=0 to 1A
V
IO=0 to 1.5A
IO
0 to 1.5
A
Operating Junction Temperature Range
Tjop
–30 to +125
°C
VIN≥VO+3V
Operating Temperature Range*
Top
–30 to +125
°C
*: Limited by Ta–PD characteristics
■Electrical Characteristics
(Ta=25°C)
Ratings
Parameter
Symbol
VO
Output Voltage
SI-8033JD
typ.
max.
min.
3.234
3.30
3.366
4.90
Conditions
η
Efficiency
Conditions
f
Oscillation Frequency
Conditions
Load Regulation
Temperature Coefficient of Output Voltage
Overcurrent Protection
Starting Current
ON/OFF*
Pin
Conditions
IS1
Conditions
typ.
max.
min.
typ.
max.
5.00
5.10
8.82
9.00
9.18
11.76
12.00
12.24
VIN=20V, IO=0.5A
VIN=21V, IO=0.5A
VIN=24V, IO=0.5A
77
82
86
88
VIN=15V, IO=0.5A
VIN=20V, IO=0.5A
VIN=21V, IO=0.5A
VIN=24V, IO=0.5A
125
125
125
125
VIN=15V, IO=0.5A
VIN=20V, IO=0.5A
VIN=21V, IO=0.5A
VIN=24V, IO=0.5A
80
40
100
10
10
30
VIN=15V, IO=0.2 to 0.8A
50
40
10
VIN=20V, IO=0.2 to 0.8A
±0.5
40
mV/ °C
1.6
A
VIN=24V
VSSL
0.5
0.5
0.5
0.5
Outflow Current
at Low Voltage
ISSL
100
100
100
100
Quiescent Circuit Current
Conditions
Iq(oFF)
Conditions
7
VIN=15V, Io=0A
7
VIN=20V, Io=0A
200
VIN=15V, VON/OFF=0.3V
7
VIN=21V, Io=0A
200
VIN=20V, VON/OFF=0.3V
V
µA
VSSL=0V
7
*: Pin 5 is the ON/OFF pin. Soft start at power on can be performed with a capacitor connected to
this pin.
The output can also be turned ON/OFF with this pin.
The output is stopped by setting the voltage of this pin to VSSL or lower.
ON/OFF-pin voltage can be changed with an open-collector drive circuit of a transistor.
When using both the soft-start and ON/OFF functions together, the discharge current from C3
flows into the ON/OFF control transistor. Therefore, limit the current securely to protect the
transistor if C3 capacitance is large.
The ON/OFF pin is pulled up to the power supply in the IC, so applying the external voltage is
prohibited.
mA
VIN=24V, Io=0A
200
200
VIN=21V, VON/OFF=0.3V
VIN=24V, VON/OFF=0.3V
µA
SI-8000JD
SI-8000JD
SI-8000JD
5 ON/OFF
5 ON/OFF
5 ON/OFF
C3
VOUT. ON/OFF
ICs
mV
VIN=24V, IO=0.2 to 0.8A
VIN=21V
Conditions
mV
40
±1.0
1.6
VIN=20V
kHZ
130
10
±1.0
1.6
VIN=15V
60
%
VIN=18 to 30V, IO=0.5A
VIN=21V, IO=0.2 to 0.8A
±0.5
1.6
120
VIN=15 to 30V, IO=0.5A
V
Low Level Voltage
Iq
16
Unit
min.
VIN=10 to 30V, IO=0.5A
∆VO/∆Ta
SI-8120JD
max.
VIN=8 to 30V, IO=0.5A
∆VOLOAD
Conditions
SI-8090JD
typ.
VIN=15V, IO=0.5A
25
∆VOLINE
Line Regulation
SI-8050JD
min.
Soft Start
C3
Soft Start
+VOUT. ON/OFF
SI-8000JD Series
■External Dimensions (TO263-5)
(Unit : mm)
±0.2
10.0
(8.0)
±0.2
1.2
(2×R0.45)
(3°)
±0.3
±0.15
0.10
(3°)
±0.1
(3°)
±0.2
2.54
(R0.3)
4.9
±0.3
±0.2
2.4
(R0.3)
2.0
(0.75)
±0.2
4.9
±0.10
0.88
0 to 6°
(0.5)
±0.1
±0.1
±0.25
(1.7
0.8
±0.25
)
(1.7
)
1
2
3
4
Pin Assignment
q VIN
w SWOUT
e GND
r VOS
t ON/OFF
15.30
15.3
9.2±
±0.3
±0.2
(6.8)
±0.2
1.3 +0.10
–0.05
±0.2
(4.6)
3-R0.3
φ1.5 Dp:
(4.4)
±0.2
4.5
9.2
(15°)
(1.75)
(0.40)
Case temperature
measurement point
(1.7
±0.25
0.8
±0.25
(1.7
)
)
Plastic Mold Package Type
Flammability: 94V-0
Product Mass: Approx. 1.48g
5
±0.2
9.9
(3°)
(3°)
2-R0.3
±0.02
10.0
■Typical Connection Diagram
■Block Diagram
L1
VIN
1
SWOUT
VIN
PReg.
SI-8000JD
OCP
5 ON/OFF
+
Latch &
Drive
Reset
SWOUT
VIN
2
C1
ON/OFF
Soft
Start
1
VOS
2
VOUT
4
+
ON/OFF GND
5
3
Di
C2
C3
OSC
GND
+
–
TSD
Comp.
Error Amp.
C1
C2
C3
L1
Di
4
+
–
VREF
GND
3
:
:
:
:
:
GND
50V/220µF
25V/470µF
10V/0.47µF (Only when using soft-start function)
100µH
SJPB-H6 (Sanken)
■Reference Data
Thermal Resistance (junction to ambient air)
θ j-a (°C/W )
Copper Laminate Area on Glass Epoxy Board vs.
Thermal Resistance (Junction to Ambient Air) (Typical Value)
Output Current vs. Power Dissipation (Typical)
Power Dissipation Pd (W)
55
50
With glass epoxy board of 40 × 40 mm
45
40
35
30
0
200
400
600
800
1000
1200
1400
1600
1800
Copper Laminate Area (mm2)
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
40V
30V
20V
VIN 8V
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
Output Current IO (A)
■Ta-PD Characteristics
3.5
Power Dissipation PD (W)
3
Copper Area
40×40 mm
( θ j-a : 33.3°C/W)
PD=VO·IO
20×40 mm
( θ j-a : 37°C/W)
2.5
20×20 mm
( θ j-a :44°C/W)
2
10×10 mm
( θ j-a : 53°C/W)
100
VO
–1 –VF·IO 1–
ηχ
VIN
The efficiency depends on the input voltage and the output current. Therefore, obtain the value
from the efficiency graph and substitute the percentage in the formula above.
VO : Output Voltage
1.5
VIN : Input Voltage
IO : Output Current
1
ηχ : Efficiency (%)
0.5
VF : D1 forward voltage
0
–25
0
25
50
75
100
125
0.4V(IO=2A)(SJPB-H6)
Ambient Temperature Ta (°C)
Thermal design for D1 must be considered separately.
ICs
17