SI-8000TM Ver la hoja de datos (PDF) - Sanken Electric co.,ltd.
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SI-8000TM Datasheet PDF : 15 Pages
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DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
*3 Efficiency is calculated by the following equation.
VO･IO
η(%)= VIN･IIN ×100
*4 No.5 terminal is a SS terminal to enable soft start by connecting a capacitor. The output can
be turned on and off by using a SS terminal. The output is stopped by decreasing the SS
terminal voltage below VSSL and in order to perform ON/OFF operation of Vout, it is required
to connect NPN transistor or the output of open collector type TTL between No.5 terminal
and GND.
In case that both soft and Vout ON/OFF are used, a protection measure such as limitation of
current is required, as the discharge current of C3 flows across a transistor for ON/OFF
operation, if the capacitance of C3 large. As a pull-up type resistor is provided inside the IC,
no external voltage can be applied. In case of no use of ON/OFF, please keep it open.
SSII--8000000TTMFE
5 SS
SSII--800000TTMFE
5 SS
C3
SSII--8800000TTMFE
5 SS
C3
VO.ON/OFF
Soft start
Soft start
+VO.ON/OFF
4-2 Typical characteristics (Ta=25℃)
（１）Efficiency
SI-80S0I8-T8M00E8TffMic／ieEnTEfcfFfyiEfcEiCifc nfiiuecc効rnyivec率Cneycuy特rv性e
Vo=5VTaA=d2ju5℃ste dV：VooR==155=vV4設a.2d定kjuO時shtemd：, RR21==04.82kkOΩhmR2=0 8kΩ
85
80
75
70
65
VIN=
8v,10v,15v,20v,30v,
40v
60
55
0
0.5
1
1.5
Iout A
Sanken Electric Co.,Ltd.
4/15
I02-001EA-050910
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