4
LT4220
4220f
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.
AC ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR A CE CHARACTERISTICS
UW
SUPPLY VOLTAGE (V)
0
SUPPLY CURRENT (mA)
2
3
20
4220 G01
1
0
5
10
15
4
FB
+
VOLTAGE (V)
–1.5
V
CC
-SENSE
+
VOLTAGE (mV)
50
40
30
20
10
0
–1.0
–0.5 0 0.5
4220 G02
1.0 1.5 –1.5
–1.0
–0.5 0 0.5 1.0 1.5
FB
–
VOLTAGE (V)
SENSEK-SENSE
–
VOLTAGE (mV)
60
50
40
30
20
10
0
4220 G03
T
A
= 25°C
I
CC
I
EE
V
CC
= 5V
V
EE
= –5V
ON
+
= 2V
ON
–
= –2V
T
A
= 25°C
V
CC
= 5V
V
EE
= –5V
ON
+
= 2V
ON
–
= –2V
T
A
= 25°C
Positive Circuit Breaker Sense
Voltage vs FB
+
Voltage
Negative Circuit Breaker Sense
Voltage vs FB
–
Voltage
Supply Current vs Supply Voltage
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
PHLON
+
ON
+
Low to GATE
+
Low 5k Pull-Up to GATE
+
, 1nF Load Capacitor ● 0.6 0.8 1.2 µs
t
PLHON
+
ON
+
High to GATE
+
High 5k Pull-Up to GATE
+
, 1nF Load Capacitor ● 0.6 1.5 3 µs
t
PHLFB
+
FB
+
Low to PWRGD Low 5k Pull-Up to PWRGD ● 0.5 0.8 1.2 µs
t
PLHFB
+
FB
+
High to PWRGD High 5k Pull-Up to PWRGD ● 0.6 1.25 3 µs
t
PHLON
–
ON
–
Low to GATE
–
Low 5k Pull-Up to GATE
–
, 1nF Load Capacitor ● 0.6 1 1.5 µs
t
PLHON
–
ON
–
High to GATE
–
High 5k Pull-Up to GATE
–
, 1nF Load Capacitor ● 1 2.1 3.5 µs
t
PHLFB
–
FB
–
Low to PWRGD Low 5k Pull-Up to PWRGD ● 0.6 1 1.5 µs
t
PLHFB
–
FB
–
High to PWRGD High 5k Pull-Up to PWRGD ● 0.8 1.25 2 µs
t
SENSE
+
SENSE
+
to GATE
+
Low 1nF On GATE
+
, 100mV Step, 5k Pull-Up ● 146 µs
t
SENSE
–
SENSE
–
to GATE
–
Low 1nF On GATE
–
, 100mV Step, 5k Pull-Up ● 146 µs
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages referenced to ground (GND) unless
specified.
Note 3: The absolute voltage difference between FB
+
and FB
–
required to
force either the GATE
+
or GATE
–
current to 0µA.
