Data Sheet

© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSQ-Series • Rev. 1.1.3 8
FSCQ-Series — Green Mode Fairchild Power Switch (FPS™)
Electrical Characteristics
T
A
= 25°C unless otherwise specified.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
Sync Section
V
SH1
Sync Threshold in Normal QR (H)
V
CC
= 18 V, V
FB
= 5 V
4.2
4.6
5.0
V
V
SL1
Sync Threshold in Normal QR (L)
2.3
2.6
2.9
V
V
SH2
Sync Threshold in Extended QR (H)
2.7
3.0
3.3
V
V
SL2
Sync Threshold in Extended QR (L)
1.6
1.8
2.0
V
f
SYH
Extended QR Enable Frequency
90
kHz
f
SYL
Extended QR Disable Frequency
45
kHz
Total Device Section
I
OP
Operating Supply Current in
Normal Operation
(8)
FSCQ0565RT
V
FB
= 5 V
4
6
mA
FSCQ0765RT
4
6
FSCQ0965RT
6
8
FSCQ1265RT
6
8
FSCQ1565RT
7
9
I
OB
Operating Supply Current in Burst Mode (Non-
Switching)
(8)
V
FB
= GND
0.25
0.50
mA
I
START
Startup Current
V
CC
= V
START
– 0.1 V
25
50
μA
I
SN
Sustain Latch Current
(6)
V
CC
= V
STOP
– 0.1 V
50
100
μA
Current Sense Section
I
LIM
Maximum Current Limit
(9)
FSCQ0565RT
V
CC
= 18 V, V
FB
= 5 V
3.08
3.50
3.92
A
FSCQ0765RT
4.40
5.00
5.60
FSCQ0965RT
5.28
6.00
6.72
FSCQ1265RT
6.16
7.00
7.84
FSCQ1565RT
7.04
8.00
8.96
I
BUR(pk)
Burst Peak Current
FSCQ0565RT
V
CC
= 18 V, V
FB
= Pulse
0.45
0.65
0.85
A
FSCQ0765RT
0.65
0.90
1.15
FSCQ0965RT
0.60
0.90
1.20
FSCQ1265RT
0.80
1.20
1.60
FSCQ1565RT
1.00
Notes:
6. These parameters, although guaranteed, are tested only in wafer test process.
7. These parameters, although guaranteed by design, are not tested in production.
8. This parameter is the current flowing in the control IC.
9. These parameters indicate inductor current.
10. These parameters, although guaranteed, are tested only in wafer test process.