Datasheet
LTC3621/LTC3621-2
3
3621fb
For more information www.linear.com/LTC3621
elecTrical characTerisTics
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
J
= 25°C. (Note 3) V
IN
= 12V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Operating Voltage 2.7 17 V
V
OUT
Operating Voltage 0.6 V
IN
V
I
VIN
Input Quiescent Current Shutdown Mode, V
RUN
= 0V
Burst Mode Operation
Forced Continuous Mode (Note4), V
FB
< 0.6V
0.1
3.5
1.5
1.0
7
µA
µA
mA
V
FB
Regulated Feedback Voltage LTC3621/LTC3621-2
l
0.594
0.591
0.6
0.6
0.606
0.609
V
V
I
FB
FB Input Current LTC3621/LTC3621-2 10 nA
V
OUT
Regulated Fixed Output Voltage LTC3621-3.3/LTC3621-23.3
l
3.267
3.250
3.3
3.3
3.333
3.350
V
V
LTC3621-5/LTC3621-25
l
4.950
4.925
5.0
5.0
5.050
5.075
V
V
I
FB(VOUT)
Feedback Input Leakage Current Fixed Output Versions 2 10 µA
ΔV
LINE(REG)
Reference Voltage Line Regulation V
IN
= 2.7V to 17V (Note 5) 0.01 0.015 %/V
ΔV
LOAD(REG)
Output Voltage Load Regulation (Note 5) 0.1 %
I
LSW
NMOS Switch Leakage
PMOS Switch Leakage
0.1
0.1
1
1
µA
µA
R
DS(ON)
NMOS On-Resistance (Bottom FET) V
IN
= 5V 0.15 Ω
PMOS On-Resistance (Top FET) 0.37 Ω
D
MAX
Maximum Duty Cycle V
FB
= 0.5V, V
MODE/SYNC
= 1.5V
l
100 %
t
ON(MIN)
Minimum On-Time 60 ns
V
RUN
RUN Input High Threshold
RUN Input Low Threshold
0.3
1.0 V
V
I
RUN
RUN Input Current V
RUN
= 12V 0 20 nA
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3621EMS8E-2#PBF LTC3621EMS8E-2#TRPBF LTGHZ 8-Lead Plastic MSOP –40°C to 125°C
LTC3621IMS8E-2#PBF LTC3621IMS8E-2#TRPBF LTGHZ 8-Lead Plastic MSOP –40°C to 125°C
LTC3621EMS8E-23.3#PBF LTC3621EMS8E-23.3#TRPBF LTGNZ 8-Lead Plastic MSOP –40°C to 125°C
LTC3621IMS8E-23.3#PBF LTC3621IMS8E-23.3#TRPBF LTGNZ 8-Lead Plastic MSOP –40°C to 125°C
LTC3621EMS8E-25#PBF LTC3621EMS8E-25#TRPBF LTGQB 8-Lead Plastic MSOP –40°C to 125°C
LTC3621IMS8E-25#PBF LTC3621IMS8E-25#TRPBF LTGQB 8-Lead Plastic MSOP –40°C to 125°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/