LTC3621-2_15 Datasheet, PDF (3/18 Pages) Linear Technology – 17V, 1A Synchronous Step-Down Regulator with 3.5A Quiescent Current

LTC3621/LTC3621-2
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
LTC3621HMS8E-2#PBF LTC3621HMS8E-2#TRPBF LTGHZ
8-Lead Plastic MSOP
–40°C to 150°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
LTC3621HMS8E-23.3#PBF LTC3621HMS8E-23.3#TRPBF LTGNZ
8-Lead Plastic MSOP
–40°C to 150°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
LTC3621HMS8E-25#PBF LTC3621HMS8E-25#TRPBF LTGQB
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/
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
V_OUT
Operating Voltage
I_VIN
Input Quiescent Current
Shutdown Mode, V_RUN = 0V
Burst Mode Operation
Forced Continuous Mode (Note 4), V_FB
< 0.6V
2.7
17
V
0.6
V_IN
V
0.1
1.0
µA
3.5
7
µA
1.5
mA
V_FB
Regulated Feedback Voltage
LTC3621/LTC3621-2
0.594
0.6
0.606
V
l 0.591
0.6
0.609
V
I_FB
FB Input Current
V_OUT
Regulated Fixed Output Voltage
LTC3621/LTC3621-2
LTC3621-3.3/LTC3621-23.3
10
nA
3.267
3.3
3.333
V
l 3.250
3.3
3.350
V
LTC3621-5/LTC3621-25
4.950
5.0
5.050
V
l 4.925
5.0
5.075
V
I_FB(VOUT) Feedback Input Leakage Current
ΔV_LINE(REG) Reference Voltage Line Regulation
ΔV_LOAD(REG) Output Voltage Load Regulation
I_LSW
NMOS Switch Leakage
PMOS Switch Leakage
Fixed Output Versions
V_IN = 2.7V to 17V (Note 5)
(Note 5)
2
10
µA
0.01
0.015
%/V
0.1
%
0.1
1
µA
0.1
1
µA
R_DS(ON)
NMOS On-Resistance (Bottom FET)
PMOS On-Resistance (Top FET)
V_IN = 5V
0.15
Ω
0.37
Ω
D_MAX
Maximum Duty Cycle
V_FB = 0.5V, V_MODE/SYNC = 1.5V
l
100
%
t_ON(MIN)
V_RUN
Minimum On-Time
RUN Input High Threshold
RUN Input Low Threshold
60
ns
1.0
V
0.3
V
I_RUN
RUN Input Current
V_RUN = 12V
0
20
nA
For more information www.linear.com/LTC3621
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