Datasheet
2
LT4220
4220f
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
V
CC
Operating Range ● 2.7 16.5 V
I
CC
V
CC
Supply Current ● 2.7 4 mA
V
EE
V
EE
Operating Range ● –2.7 –16.5 V
I
EE
V
EE
Supply Current –1.6 –2.4 mA
V
PLKO
V
CC
Undervoltage Lockout ● 2.35 2.45 2.55 V
V
MLKO
V
EE
Undervoltage Lockout ● –2.4 –2.45 –2.5 V
V
ON
+
H
ON
+
ON Threshold ON
+
Rising ● 1.22 1.24 1.26 V
V
ON
+
HYS
ON
+
Hysteresis ● 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 ● 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 ● 0.05 1 mV/V
V
ON
–
HYS
ON
–
Hysteresis ● 25 50 70 mV
V
ON
–
H
ON
–
ON Voltage Threshold ON
–
Falling ● –1.22 –1.24 –1.26 V
I
ON
+
ON
+
Input Current V
ON
+
= 2V ● 0.01 ±1 µA
I
ON
–
ON
–
Input Current V
ON
–
= GND ● 0.01 ±1 µA
V
FB
+
H
FB
+
PWRGD Voltage Threshold FB
+
Rising ● 1.22 1.24 1.26 V
V
FB
+
HYS
FB
+
Hysteresis Gate = 5V ● 25 50 70 mV
V
FB
–
H
FB
–
PWRGD Voltage Threshold FB
–
Falling ● –1.22 –1.24 –1.26 V
V
FB
–
HYS
FB
–
Hysteresis Gate = 3V ● 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°C ≤ T
A
≤ 70°C
LT4220I ....................................... –40°C ≤ T
A
≤ 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
U
ORDER PART
NUMBER
LT4220CGN
LT4220IGN
GN PART MARKING
4220
4220I
T
JMAX
= 125°C, θ
JA
= 130°C/W
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°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