150KHZ， PWM BUCK DC/DC CONVERTER
2A
FSP3125
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
On/Off Pin Input Voltage
Feedback Pin Voltage
Output Voltage to Ground
Power Dissipation
Storage Temperature
Operating Temperature
Operating Voltage
Value
+24
-0.3 to +18
-0.3 to +18
-1
Internally Limited
-65 to +150
-40 to +125
+4.5 to +22
Unit
V
V
V
V
W
℃
℃
V
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, V
IN
=12V for 3.3V, 5V and adjustable version and V
IN
=18V for the 12V version. I
LOAD
=
0.5A)
Parameter
Feedback Bias Current
Oscillator Frequency
Short Circuit Oscillator
Frequency
Saturation Voltage
Maximum Duty Cycle(On)
Minimum Duty Cycle(Off)
Current Limit
Output
Leakage
Current
Output=-1
Quiescent Current
Output=0
Standby Quiescent Current
ON/OFF Pin Logic Input
Threshold Voltage
ON/OFF Pin Input Current
ON/OFF Pin Logic Input
Current
Thermal Resistance
Thermal Resistance with
Copper Area of Approximately
3 in
2
Symbol
I
FB
F
osc
F
CSP
V
SAT
DC
When Current Limit Occur and
V
FB
＜
0.5V, T
A
=25°C
I
OUT
= 2A, No Outside Circuit ,
V
FB
= 0V force drive on
V
FB
= 0V force drive on
V
FB
=12V force drive off
Peak Current
No Outside Circuit ,
V
FB
= 0V force drive on
No Outside Circuit ,
V
FB
= 12V force drive off
V
IN
= 22V
V
FB
= 12V force drive off
ON/OFF Pin=5V,V
IN
= 22V
Low (Regulator ON)
High (Regulator OFF)
V
LOGIC
=0.5V(ON)
V
LOGIC
=2.5V(OFF)
SOP8L
SOP8L
Junction to Case
Junction to
Ambient
15
70
℃/W
2.0
Test Conditions
V
FB
= 1.3V
(Adjustable Version Only)
Min.
Typ.
-10
127
110
10
150
30
1.25
0
3.6
3.4
6.9
7.5
-50
5
70
1.3
-30
10
200
250
0.6
-5
-15
µA
µA
mA
mA
µA
V
Max.
-50
-100
173
173
50
1.4
1.5
100
Unit
nA
kHz
kHz
V
%
A
I
CL
I
L
I
Q
I
STBY
V
IL
V
IH
I
L
I
H
θ
JC
θ
JA
2/9
2007-3-27
FOSLINK [ FOSLINK SEMICONDUCTOR CO.,LTD ]
