2
LT4220
4220f
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
CC
V
CC
Operating Range
q 2.7
16.5
V
I
CC
V
CC
Supply Current
q
2.7
4
mA
V
EE
V
EE
Operating Range
q 2.7
16.5
V
I
EE
V
EE
Supply Current
1.6
2.4
mA
V
PLKO
V
CC
Undervoltage Lockout
q 2.35
2.45
2.55
V
V
MLKO
V
EE
Undervoltage Lockout
q 2.4
2.45
2.5
V
V
ON
+
H
ON
+
ON Threshold
ON
+
Rising
q 1.22
1.24
1.26
V
V
ON
+
HYS
ON
+
Hysteresis
q
25
50
70
mV
V
ON
+
H
ON
+
ON Threshold Line Regulation
V
CC
= 2.7V, V
EE
= 2.7V to V
CC
= 16.5V, V
EE
= 16.5V q
0.02
0.15
mV/V
V
ON
H
ON
ON Threshold Line Regulation
V
CC
= 2.7V, V
EE
= 2.7V to V
CC
= 16.5V, V
EE
= 16.5V q
0.05
1
mV/V
V
ON
HYS
ON
Hysteresis
q
25
50
70
mV
V
ON
H
ON
ON Voltage Threshold
ON
Falling
q 1.22
1.24
1.26
V
I
ON
+
ON
+
Input Current
V
ON
+
= 2V
q
0.01
?
礎
I
ON
ON
Input Current
V
ON
= GND
q
0.01
?
礎
V
FB
+
H
FB
+
PWRGD Voltage Threshold
FB
+
Rising
q 1.22
1.24
1.26
V
V
FB
+
HYS
FB
+
Hysteresis
Gate = 5V
q
25
50
70
mV
V
FB
H
FB
PWRGD Voltage Threshold
FB
Falling
q 1.22
1.24
1.26
V
V
FB
HYS
FB
Hysteresis
Gate = 3V
q
25
50
70
mV
(Notes 1, 2)
V
CC
to GND ............................................................. 22V
V
EE
to GND ........................................................... 22V
TRACK, TIMER .............................. 0.3V to V
CC
+ 0.3V
ON
+
, FB
+
................................. V
EE
0.3V to V
CC
+ 0.3V
ON
, FB
.................................. V
EE
0.3V to V
CC
+ 0.3V
GATE
+
................................................ 0.3V to V
CC
+ 8V
GATE
..............................16.5V with V
EE
= 22V to 0V
SENSE
+
............................................. 0.3V to V
CC
+ 5V
SENSE
,
SENSEK ....................... V
EE
0.3V to V
EE
+ 3V
PWRGD, FAULT................................. 0.3V to V
CC
+ 5V
Operating Temperature Range
LT4220C...........................................0癈 d T
A
d 70癈
LT4220I ....................................... 40癈 d T
A
d 85癈
Storage Temperature Range ................. 65癈 to 150癈
Lead Temperature (Soldering, 10 sec)..................300癈
ABSOLUTE MAXIMUM RATINGS
W
W
PACKAGE/ORDER INFORMATION
U
U
ORDER PART
NUMBER
LT4220CGN
LT4220IGN
GN PART MARKING
4220
4220I
T
JMAX
= 125癈, ?/DIV>
JA
= 130癈/W
The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25?/SPAN>C. V
CC
= 5V, V
EE
= 5V, unless otherwise noted.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
GN PACKAGE
16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
V
EE
SENSEK
SENSE
GATE
FB
ON
TRACK
TIMER
V
CC
SENSE
+
GATE
+
FB
+
ON
+
FAULT
PWRGD
GND
DC ELECTRICAL CHARACTERISTICS
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