LT3663
3
3663fc
For more information For more information www.linear.com/LT3663
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: Absolute Maximum Voltage at V
IN
and RUN pins is 60V for
nonrepetitive 1 second transients.
Note 3: The LT3663E is guaranteed to meet performance specifications
from 0°C to 125°C. Specifications over the –40°C to 125°C operating
temperature range are assured by design, characterization, and
correlation with statistical process controls. The LT3663I specifications
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V, R
ILIM
= 36.5k unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Undervoltage Lockout Rising
l
7 7.5 V
V
IN
Undervoltage Lockout Hysteresis 500 mV
V
IN
Overvoltage Lockout Rising
l
36 39 41 V
V
IN
Overvoltage Lockout Hysteresis 1 V
V
IN
Supply Current Not Switching 2.4 3.2 mA
V
IN
Supply Current in Shutdown V
RUN
= 0V 0.01 2 µA
Run Input Voltage High 2.5 V
Run Input Voltage Low 0.3 V
Run Pin Bias Current V
RUN
= 2.3V (Note4)
V
RUN
= 0V
6
0.01
15
0.1
µA
µA
V
OUT
Current Limit Range
l
0.4 1.2 A
V
OUT
Current Limit
l
0.8 1 1.2 A
Operating Frequency LT3663
LT3663-X
1350
900
1500
1000
1650
1100
kHz
kHz
Maximum Duty Cycle
l
80 92 %
Feedback Voltage LT3663
l
784 800 816 mV
FB Bias Current V
FB
= 0.8V, LT3663 50 150 nA
Regulated Output Voltage LT3663-3.3
LT3663-5
l
l
3.234
4.900
3.3
5
3.366
5.100
V
V
V
OUTS
Bias Current LT3663-X 90 120 µA
Switch Peak Current Limit (Note 5)
l
1.6 2 2.5 A
Switch V
CESAT
I
SW
= 1A 275 mV
Minimum BOOST Voltage I
SW
= 1A (Note 6) 1.85 2.2 V
Boost Diode Drop I
DIODE
= 60mA 0.9 1.2 V
Boost Pin Current I
SW
= 1A 28 mA
are guaranteed over the full –40°C to 125°C temperature range. The
LT3663H specifications are guaranteed over the –40°C to 150°C operating
temperature range. High junction temperatures degrade operating
lifetimes. Operating lifetime is derated at junction temperatures greater
than 125°C.
Note 4: Current flows into pin.
Note 5: Switch Peak Current Limit guaranteed by design and/or correlation
to static test.
Note 6: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3663IMS8E-5#PBF LT3663IMS8E-5#TRPBF LTFMZ 8-Lead Plastic MSOP –40°C to 125°C
LT3663HMS8E-5#PBF LT3663HMS8E-5#TRPBF LTFMZ 8-Lead Plastic MSOP –40°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
orDer inForMaTion
