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FSP3125SE Datasheet(PDF) 2 Page - FOSLINK SEMICONDUCTOR CO.,LTD

Part # FSP3125SE
Description  150KHZ竊?A PWM BUCK DC/DC CONVERTER
PDF  9 Pages
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Manufacturer  FOSLINK [FOSLINK SEMICONDUCTOR CO.,LTD]
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FSP3125SE Datasheet(HTML) 2 Page - FOSLINK SEMICONDUCTOR CO.,LTD

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150KHZ，2A PWM BUCK DC/DC CONVERTER
2007-3-27
2/9
FSP3125
ABSOLUTE MAXIMUM RATINGS
Parameter
Value
Unit
Supply Voltage
+24
V
On/Off Pin Input Voltage
-0.3 to +18
V
Feedback Pin Voltage
-0.3 to +18
V
Output Voltage to Ground
-1
V
Power Dissipation
Internally Limited
W
Storage Temperature
-65 to +150
℃
Operating Temperature
-40 to +125
℃
Operating Voltage
+4.5 to +22
V
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, VIN=12V for 3.3V, 5V and adjustable version and VIN=18V for the 12V version. ILOAD =
0.5A)
Parameter
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
-50
Feedback Bias Current
IFB
VFB = 1.3V
(Adjustable Version Only)
-10
-100
nA
127
150
173
Oscillator Frequency
Fosc
110
173
kHz
Short Circuit Oscillator
Frequency
FCSP
When Current Limit Occur and
VFB ＜ 0.5V, TA=25°C
10
30
50
kHz
1.4
Saturation Voltage
VSAT
IOUT= 2A, No Outside Circuit ,
VFB = 0V force drive on
1.25
1.5
V
Maximum Duty Cycle(On)
VFB = 0V force drive on
100
Minimum Duty Cycle(Off)
DC
VFB =12V force drive off
0
%
3.6
6.9
Current Limit
ICL
Peak Current
No Outside Circuit ,
VFB = 0V force drive on
3.4
7.5
A
Output=0
No Outside Circuit ,
VFB = 12V force drive off
-50
µA
Output=-1
Output
Leakage
Current
IL
VIN = 22V
-30
mA
Quiescent Current
IQ
VFB = 12V force drive off
5
10
mA
200
Standby Quiescent Current
ISTBY
ON/OFF Pin=5V,VIN = 22V
70
250
µA
VIL
Low (Regulator ON)
0.6
ON/OFF Pin Logic Input
Threshold Voltage
VIH
High (Regulator OFF)
2.0
1.3
V
ON/OFF Pin Input Current
IL
VLOGIC=0.5V(ON)
-5
ON/OFF Pin Logic Input
Current
IH
VLOGIC=2.5V(OFF)
-15
µA
Thermal Resistance
θJC
SOP8L
Junction to Case
15
Thermal Resistance with
Copper Area of Approximately
3 in
2
θJA
SOP8L
Junction to
Ambient
70
℃
/W



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