150KHZ 500MA STEP DOWN VOLTAGE REGULATOR
FSP3127
OPERATING CONDITIONS
Parameter
Input Voltage
Junction Temperature
Symbol
V
IN
T
J
Test Conditions
Min.
4.5
-40
Typ.
Max.
40
+125
Unit
V
°C
ELECTRICAL CHARACTERISTICS
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
Output
Feedback
Efficiency
Output
Feedback
Efficiency
Output
Feedback
Efficiency
Output
Feedback
FSP3127-5.0V
Symbol
I
FB
F
osc
F
CSP
V
SAT
DC
Test Conditions
V
FB
= 1.3V
(Adjustable Version Only)
No Outside Circuit ,
V
FB
= 0V force drive on
When Current Limit Occur and
V
FB
＜
0.5V, T
A
=25°C
I
OUT
= 0.5A,
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
= 40V
V
FB
= 12V force drive off
ON/OFF Pin=5V,V
IN
= 40V
Low (Regulator ON)
High (Regulator OFF)
V
LOGIC
=0.5V(ON)
V
LOGIC
=2.5V(OFF)
SOP8L
PDIP8L
Junction to Ambient
Junction to Ambient
4.5V
≤V
IN
≤40V
0.1A
≤I
LOAD
≤0.5A
V
OUT
Programmed for 3V
V
IN
=12V, I
LOAD
= 0.5A
4.5V
≤V
IN
≤40V
0.1A
≤I
LOAD
≤0.5A
V
IN
=12V, I
LOAD
= 0.5A
7V
≤V
IN
≤40V
0.2=1A
≤I
LOAD
≤2=0.5A
V
IN
=12V, I
LOAD
= 2=0.5A
15V
≤V
IN
≤40V
0.1A
≤I
LOAD
≤0.5A
2.0
Min.
Typ.
10
127
110
10
150
30
0.9
100
0
0.65
0.58
0.8
2
2
5
85
1.3
0.02
5
150
95
1.193
1.18
80
3.168
3.135
80
4.8
4.75
82
11.52
5
5.2
5.25
11.4
3.3
3.432
3.465
1.23
1.267
1.28
1.3
1.4
50
15
10
200
250
0.6
5
15
µA
℃/W
V
%
V
%
V
%
V
A
µA
mA
mA
µA
V
Max.
50
100
173
173
50
1.1
1.2
Unit
nA
kHz
kHz
V
%
I
CL
I
L
I
Q
I
STBY
V
IL
V
IH
I
L
I
H
θ
JA
V
FB
FSP3127-ADJ
η
V
FB
FSP3127-3.3V
η
V
FB
η
FSP3127-12V
V
FB
12
12.48
12.6
Efficiency
η
V
IN
=12V, I
LOAD
= 0.5A
88
Specifications with
boldface
are for full operating temperature range, the other type are for T
J
=25°C
%
2/8
2007-4-9
FOSLINK [ FOSLINK SEMICONDUCTOR CO.,LTD ]
