SI-8000GL_10 Datasheet, PDF (1/2 Pages) Sanken electric – Compact, Separate Excitation Step-down Switching Mode Regulator ICs

1-1-2 Switching Mode Regulator ICs
SI-8000GL Series Compact, Separate Excitation Step-down Switching Mode Regulator ICs
■Features
• DIP 8 pin package
• Output current: 1.5A
• High efficiency: 86% (at VIN = 20V, lO = 1A, VO
= 5V)
• Capable of downsize a choke-coil due to IC's
high switching frequency (250kHz). (Com-
pared with conventional Sanken devices)
• The output-voltage-variable type can vary its
output voltage from 1V to 14V because of its
low reference voltage (Vref) of 1V.
• Wide Input Voltage Range (8 to 50V)
• Output ON/OFF available
• Built-in overcurrent protection and thermal
protection circuits
■Absolute Maximum Ratings
Parameter
DC Input Voltage
Power Dissipation
Junction Temperature
Storage Temperature
Thermal Resistance (junction to case)
Thermal Resistance (junction to ambient air)
Symbol
VIN
PD*1
Tj
Tstg
θ j-c
θ j-a
*1: Limited by thermal protection.
Ratings
53
1
+125
–40 to +125
28
100
Unit
V
W
°C
°C
°C/W
°C/W
■Applications
• Onboard local power supplies
• OA equipment
• For stabilization of the secondary-side output voltage of switching power supplies
■Recommended Operating Conditions
Ratings
Parameter
Symbol
SI-8010GL
Unit
DC Input Voltage Range
VIN
(8 or VO+3)^*1 to 50
V
Output Voltage Range
VO
1 to 14
V
Output Current Range
IO
0.02 to 1.5^*2
A
Operating Junction Temperature Range
Tjop
–30 to +125
°C
Operating Temperature Range
Top
–30 to +125
°C
*1: The minimum value of an input voltage range is the higher of either 8V or VO+3V.
*2: Please be sure to let the output current run more than 20 mA. When using by less than 20 mA, there is a possibility that the output voltage becomes unstable.
■Electrical Characteristics
Parameter
Symbol
min.
Reference Voltage
VREF
Conditions
0.97
Efficiency
Eff
Conditions
Oscillation Frequency
FOSC
Conditions
Line Regulation
∆VOLINE
Conditions
Load Regulation
∆VOLOAD
Conditions
Temperature Coefficient
of Reference Voltage
∆VREF/∆Ta
Ratings
SI-8010GL (Variable type)
typ.
1.00
VIN=12V, IO=1A
86
VIN=20V, IO=1A, VO=5V
250
VIN=12V, IO=1A
20
VIN=10 to 30V, IO=1A
10
VIN=12V, IO=0.1 to 1.5A
±0.5
Overcurrent Protection
IS
1.6
Starting Current
Conditions
Quiescent Circuit Current
Iq
Conditions
Circuit Current at Output OFF
Iq(OFF)
Conditions
CE/SS^*
Terminal
Low Level Voltage
Terminal Outflow
Current at Low Voltage
VSSL
ISSL
Conditions
VIN=12V
7
VIN=12V, IO=0A
VIN=12V, VON/OFF=0.3V
VSSL=0V
*: Pin 2 is the CE/SS 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. CE/SS-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 C4 flows into the ON/OFF control transistor. Therefore, limit the current securely to
protect the transistor if C3 capacitance is large. The CE/SS pin is pulled up to the power
supply in the IC, so applying the external voltage is prohibited.
SI-8000GL
2 CE/SS
max.
1.03
40
30
400
0.5
50
SI-8000GL
2 CE/SS
C4
(Ta=25°C)
Unit
V
%
kHZ
mV
mV
mV/°C
A
mA
µA
V
µA
SI-8000GL
2 CE/SS
C4
VO. ON/OFF
Soft start
Soft start
+VO. ON/OFF
60 ICs