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SI-8000SD 数据表(PDF) 1 Page - Sanken electric

部件名 SI-8000SD
功能描述  Surface Mount Separate Excitation Step-down Switching Mode Regulator ICs
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制造商  SANKEN [Sanken electric]
网页  http://www.sanken-ele.co.jp/en
标志 SANKEN - Sanken electric

SI-8000SD 数据表(HTML) 1 Page - Sanken electric

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50
ICs
■Features
• Surface-mount package (TO263-5)
• Output current: 3.0A
•High efficiency: 79% typ. (SI-8033SD), 84%
typ. (SI-8050SD)
• Requires only 4 discrete external components
• Internally-adjusted phase correction and
output voltage
• Built-in reference oscillator (60kHz)
• Built-in overcurrent and thermal protection
circuits
• Output ON/OFF available
• Soft start available by S.S pin
■Lineup
■Absolute Maximum Ratings
Unit
V
W
°C
°C
°C/W
°C/W
Ratings
43*1
3
+125
–40 to +125
3
33.3
Symbol
VIN
PD
Tj
Tstg
θj-c
θj-a
Parameter
DC Input Voltage
Power Dissipation*2
Junction Temperature
Storage Temperature
Thermal Resistance (Junction to Case)
Thermal Resistance
(Junction to Ambient Air)
Part Number
SI-8033SD
SI-8050SD
VO (V)
3.3
5.0
IO (A)
3
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%)
*1: 35V for SI-8033SD
*2: Limited by thermal protection circuit.
■Electrical Characteristics
Unit
V
%
kHZ
mV
mV
mV/
°C
A
V
µA
Parameter
Output Voltage
Efficiency
Oscillation Frequency
Line Regulation
Load Regulation
Temperature Coefficient of Output Voltage
Overcurrent Protection
Starting Current
Soft
Low-Level Voltage
Start Pin*
Outflow Current at
Low Voltage
Symbol
VO
Conditions
η
Conditions
f
Conditions
∆VOLINE
Conditions
∆VOLOAD
Conditions
∆VO/∆Ta
IS1
Conditions
VSSL
ISSL
Conditions
(Ta=25
°C)
Parameter
DC Input Voltage Range
Output Current Range*
Operating Junction Temperature Range
Operating Temperature Range*
Symbol
VIN1
IO
Tjop
Top
Ratings
SI-8033SD
SI-8050SD
5.5 to 28
7 to 40
0 to 3.0
–30 to +125
–30 to +125
Unit
V
A
°C
°C
*: Limited by Ta-PD characteristics.
■Recommended Operating Conditions
* Pin 5 is a soft start 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.
Soft-start 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.
If this pin is not used, leave it open.
Ratings
SI-8033SD
SI-8050SD
min.
typ.
max.
min.
typ.
max.
3.17
3.3
3.43
4.8
5.0
5.2
VIN=15V, IO=1A
VIN=20V, IO=1A
79
84
VIN=15V, IO=1A
VIN=20V, IO=1A
60
60
VIN=15V, IO=1A
VIN=20V, IO=1A
25
80
40
100
VIN=8 to 28V, IO=1A
VIN=10 to 30V, IO=1A
10
30
10
40
VIN=15V, IO=0.5 to 1.5A
VIN=20V, IO=0.5 to 1.5A
±0.5
±0.5
3.1
3.1
VIN=15V
VIN=20V
0.2
0.2
20
30
40
20
30
40
VSSL=0.2V
Surface Mount, Separate Excitation Step-down Switching Mode Regulator ICs
SI-8000SD Series
■Applications
•Power supplies for telecommunication equipment
• Onboard local power supplies
SI-8000SD
SI-8000SD
ON/OFF
5
ON/OFF
5
ON/OFF
C3
C3
5
VOUT. ON/OFF
Soft start
Soft start
+VOUT. ON/OFF
SI-8000SD
1-1-2 Switching Mode Regulator ICs


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