150KHZ 3A PWM BUCK DC/DC CONVERTER
FSP3123
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
SD
V
FB
V
OUT
P
D
T
ST
T
OP
V
OP
Paramrter
Supply Voltage
ON/OFF Pin input Voltage
Feedback Pin Voltage
Output Voltage to Ground
Power Dissipation
Storage Temperature
Operating Temperature
Operating Voltage
Rating
+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 (ALL OUTPUT VOLTAGE VERSIONS)
Unless otherwise specified, V
IN
=12V for 3.3V,5V, adjustable version and V
IN
=18V for the 12V version. I
LOAD
=0.5A
Symbol
I
B
F
OSC
F
CSP
V
SAT
DC
I
CL
I
L
I
Q
I
STBY
V
IL
V
IH
I
H
I
L
θ
JC
Paramrter
Feedback bias current
Oscillator frequency
Short Circuit Oscillator
Frequency
Saturation voltage
Max.Duty Cycle(ON)
Min.Duty Cycle(OFF)
Current limit
Output
leakage
current
Output=-1
Quiescent Current
Standby Quiesient
Current
Output=0
ON/OFF pin logic input
threshold voltage
ON/OFF pin logic input
current
ON/OFF pin input
current
Thermal Resistence
Thermal Resistence
with Copper Area of
Approximately 3 in
2
When Current Limit
Occur and
V
FB
＜
0.5V, T
A
=25°C
I
OUT
=3A
no outside circuit
V
FB
=0V force driver on
V
FB
=0V force driver on
V
FB
=12V force driver off
Peak current
no outside circuit
V
FB
=0V force driver on
no outside circuit
V
FB
=12V force driver off
V
IN
=22V
V
FB
=12V force driver off
ON/OFF Pin=5V
V
IN
=22V
Low(regultaor ON)
High(regultaor OFF)
V
LOGIC
=2.5V(OFF)
V
LOGIC
=0.5V(ON)
TO220-5L
TO263-5L
PDIP8L
TO220-5L
Junction
to case
Junction
to ambient
2.5
3.5
12
28
℃
/W
2.0
-15
µA
-5
℃
/W
Conditions
V
FB
=1.3V(Adjustable
version only)
Min.
127
110
10
Typ.
-10
150
Max.
-50
-100
173
173
50
1.4
1.5
100
0
3.6
3.4
6.9
7.5
-50
5
70
1.3
-30
10
200
250
0.6
Unit
nA
KHz
kHz
V
%
A
µA
mA
mA
µA
V
30
TO263-5L
23
PDIP8L
35
Specifications with
boldface type
are for full operating temperature range, the other type are for TJ=25
º
C.
θ
JA
2/11
2007-6-12
FOSLINK [ FOSLINK SEMICONDUCTOR CO.,LTD ]
