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IS31LT3353 Datasheet(PDF) 4 Page - Integrated Silicon Solution, Inc

Part # IS31LT3353
Description  40V/1A BUCK LED DRIVER WITH INTERNAL SWITCH
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Manufacturer  ISSI [Integrated Silicon Solution, Inc]
Direct Link  http://www.issi.com
Logo ISSI - Integrated Silicon Solution, Inc

IS31LT3353 Datasheet(HTML) 4 Page - Integrated Silicon Solution, Inc

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IS31LT3353
Integrated Silicon Solution, Inc. – www.issi.com
4
Rev. A, 10/13/2014
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input voltage, VIN
-0.3V ~ +43V
ISENSE voltage, VSENSE
VIN-5V ~ VIN+0.3V (VIN≥5V)
-0.3V ~ VIN+0.3V (VIN<5V)
LX output voltage, VLX
-0.3V ~ +43V
Adjust pin input voltage, VADJ
-0.3V ~ +6V
Switch output current, ILX
1.2A
Power dissipation, PD(MAX) (Note 2)
0.46W
Operating temperature, TA
-40°C ~ +125°C
Storage temperature, TST
-55°C ~ +150°C
Junction temperature, TJMAX
150°C
Junction to ambient, θJA
271°C/W
ESD (HBM) at LX pin
ESD (HBM) at other pins
ESD (CDM)
1kV
3kV
1kV
Note 1:
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these or any other condition beyond those indicated in the operational sections of the specifications is not
implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Note 2:
Detail information please refer to package thermal de-rating curve on Page 12.
ELECTRICAL CHARACTERISTICS
Test conditions: VIN = 12V, TA =TJ = 25°C, unless otherwise stated. (Note 3)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
VIN
Input voltage
6
40
V
IINQ_OFF
Quiescent supply current with output off
ADJ pin grounded
70
120
160
μA
IINQ_ON
Quiescent supply current with output
switching
ADJ pin floating
450
600
μA
VSENSE
Mean current sense threshold voltage
97
100
103
mV
VSENSEHYS
Sense threshold hysteresis
±15
%
ISENSE
ISENSE pin input current
VSENSE =VIN -0.1V
8
μA
VREF
Internal reference voltage
Measured on ADJ pin
with pin floating
1.2
V
VADJ
External control voltage range on ADJ
pin for dc brightness control
0.3
1.2
V
VADJ_OFF
DC voltage on ADJ pin to switch chip
from active (on) state to quiescent (off)
state
VADJ falling
0.15
0.2
0.25
V
VADJ_ON
DC voltage on ADJ pin to switch chip
from quiescent (off) state to active (on)
state
VADJ rising
0.2
0.25
0.3
V
RADJ
Resistance between ADJ pin and VREF
500
kΩ
ILX_MEAN
Continuous LX switch current
(Note 4)
1
A


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