1-1-3 DC/DC Converter ICs
SI-8000Y Series CFuullr-Mreonldt, MSeopdareateCEoxncittraotilonSStetepp-ddoowwnnSwSitwchitincghMinogdeMRoegduelator ICs
■Features
• Compact (equivalent to TO220) full-mold
package
• Output current: 8.0 A
• High efficiency: 86%
• Built-in reference oscillator (130 kHz)
• Built-in drooping-type-overcurrent protection
and thermal protection circuits
• Built-in soft start circuit (Output ON/OFF
available)
• Low current consumption during off
■Absolute Maximum Ratings
Parameter
Input Voltage
Power Dissipation
Junction Temperature
Storage Temperature
Thermal Resistance (Junction to Case)
Thermal Resistance (Junction to Ambient Air)
Symbol
VIN
PD1
PD2
Tj
Tstg
θj-c
θj-a
Ratings
45
20.8(With infinite heatsink)
1.8(Without heatsink, stand-alone operation)
–30 to +150
–40 to +150
6
66.7
■Applications
• AV equipment
• OA equipment
• Gaming equipment
• Onboard local power supplies
■Recommended Operating Conditions
Parameter
Symbol
SI-8010Y
Input Voltage Range
VIN
8 or VO+3* to 43
Output Voltage Range
Vo
1 to 15
Output Current Range
Io
Operating Junction Temperature Range
Tjop
Operating Temperature Range
Top
*: The minimum value of the input voltage range is 8 V or Vo + 3V, whichever is higher.
Raings
0 to 8.0
–30 to +135
–30 to +85
SI-8050Y
8 to 43
5
Unit
V
W
W
°C
°C
°C/W
°C/W
Unit
V
V
A
°C
°C
■Electrical Characteristics
Parameter
Symbol
Output Voltage
(Reference voltage for SI-8010Y)
VO(VREF)
Conditions
Temperature Coefficient of Output Voltage ∆VO/∆T(∆VREF/∆T)
(Reference voltage temperature coefficient for SI-8010Y)
Conditions
Efficiency
η
Conditions
Oscillation Frequency
fo
Conditions
Line Regulation
∆VOLINE
Conditions
Load Regulation
∆VOLOAD
Conditions
Overcurrent Protection Starting Current
Is
Conditions
Iq
Quiescent Circuit Current
Conditions
Iq(OFF)
Conditions
EN/SS Pin*
Outflow Current at
Low Voltage
Low Level Voltage
ISSL
Conditions
VSSL
Conditions
Error Amplifier Voltage Gain
AEA
Error Amplifier Transformer Conductance
GEA
Current Sense Amplifier Impedance
1/GCS
Maximum ON Duty
DMAX
Minimum ON Time
DMIN
*:R1=8kΩ, R2=2kΩ when Ta=25°C and Vo=5V
SI-8010Y*
mIN.
typ.
max.
0.98
1.00
1.02
VIN=30V, Io=0.1A
±0.1
VIN=30V, Io=0.1A, Ta=0 to 100°C
86
VIN=30V, Io=3A
130
VIN=30V, Io=3A
30
90
VIN=10 to 43V, Io=3A
30
90
VIN=30V, Io=0.1 to 8A
8.1
VIN=20V
8
VIN=30V, Io=0A, EN/SS=open
200
500
VIN=30V, EN/SS=0V
10
30
VIN=30V, EN/SS=0V
0.5
VIN=30V
300
800
0.16
92
200
Ratings
SI-8050Y
mIN.
typ.
max.
4.90
5.00
5.10
VIN=30V, Io=0.1A
±0.5
VIN=30V, Io=0.1A, Ta=0 to 100°C
86
VIN=30V, Io=3A
130
VIN=30V, Io=3A
30
90
VIN=10 to 43V, Io=3A
30
90
VIN=30V, Io=0.1 to 8A
8.1
VIN=20V
8
VIN=30V, Io=0A, EN/SS=open
200
500
VIN=30V, EN/SS=0V
10
30
VIN=30V, EN/SS=0V
0.5
VIN=30V
300
800
0.16
92
200
SI-8000Y
Unit
V
mV/°C
%
kHz
mV
mV
A
mA
µA
µA
V
V/V
µA/V
V/A
%
nsec
SI-8000Y
5 SS
C6
5 SS
C6
54 ICs
Soft start
Soft start
+VOUT. ON/OFF