Datasheet

LT3763
4
3763fa
For more information www.linear.com/LT3763
elecTrical characTerisTics
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3763E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3763I is guaranteed to meet performance specifications over the
–40°C to 125°C operating junction temperature range. The LT3763H is
guaranteed over the –40°C to 150°C operating junction temperature range.
High junction temperatures degrade operating lifetimes; operating lifetime
is derated for junction temperatures greater than 125°C.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Current Monitor
Sense Voltage
(V
SENSE
+
– V
SENSE
–
)
V
ISMON
Regulated to 1V, V
SENSE
–
= 10V
V
ISMON
Regulated to 200mV, V
SENSE
–
= 10V
45
5
50
10
55
15
mV
mV
Input Current Monitor
Sense Voltage
(V
IVIN
+
– V
IVIN
–
)
V
IVINMON
Regulated to 1V, V
IVIN
+
= 12V
V
IVINMON
Regulated to 200mV, V
IVIN
+
= 12V
46
6
50
10
54
14
mV
mV
Input Current Limit Sense Voltage
(V
IVIN
+
– V
IVIN
–
)
l
45 50 55 mV
PWM Driver
PWM_OUT Driver On-Resistance
Gate Pull-Up
Gate Pull-Down
V
INTVCC
= 5V
2.2
0.9
Ω
Ω
PWM to P
WM_OUT Propagation Delay
Rising
Falling
V
INTVCC
= 5V
11
38
ns
ns
Current Control Loop g
m
Amp
Offset Voltage V
SENSE
–
= 4V, V
CTRL1
= 0V
l
–3 0 3 mV
Input Common Mode Range
V
CM(LOW)
V
CM(HIGH)
(Note 5)
V
CM(HIGH)
Measured from V
IN
to V
CM
, V
SENSE
+
= V
SENSE
–
0
1.4
V
V
Output Impedance 3.5 MΩ
g
m
l
375 475 625 µA/V
Differential Gain 1.7 V/mV
Overvoltage
FB Overvoltage Protection (V
FB
Maximum) 1.515 V
Overcurrent
Overcurrent Protection
(V
SENSE
+
– V
SENSE
–
Maximum)
V
SENSE
–
= 0V, R
T
= 221kΩ 85 mV
The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V, V
EN/UVLO
= 5V unless otherwise noted.
Note 3: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. The maximum
rated junction temperature will be exceeded when this protection is active.
Continuous operation above the specified absolute maximum operating
junction temperature may impair device reliability or permanently damage
the device.
Note 4: The minimum on- and off-times are guaranteed by design and are
not tested.
Note 5: The minimum common mode voltage is guaranteed by design and
is not tested.