EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
MS PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 120°C/W
ORDER INFORMATION
LEAD FREE FINISH
LTC3419EDD#PBF
LTC3419EDD-1#PBF
LTC3419IDD#PBF
LTC3419IDD-1#PBF
LTC3419EMS#PBF
LTC3419EMS-1#PBF
LTC3419IMS#PBF
LTC3419IMS-1#PBF
TAPE AND REEL
LTC3419EDD#TRPBF
LTC3419EDD-1#TRPBF
LTC3419IDD#TRPBF
LTC3419IDD-1#TRPBF
LTC3419EMS#TRPBF
LTC3419EMS-1#TRPBF
LTC3419IMS#TRPBF
LTC3419IMS-1#TRPBF
PART MARKING*
LCQJ
LCWW
LCQJ
LCWW
LTCQK
LTCWX
LTCQK
LTCWX
PACKAGE DESCRIPTION
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–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/
3419fa
2
LTC3419
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IN
V
UV
I
FB
V
FBREG1
PARAMETER
V
IN
Operating Voltage
V
IN
Undervoltage Lockout
Feedback Pin Input Current
V
IN
Low to High
LTC3419
LTC3419-1
The
●
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C, V
IN
= 3.6V, unless otherwise noted.
CONDITIONS
●
●
●
●
●
●
●
●
●
●
●
●
MIN
2.5
TYP
2.1
3
MAX
5.5
2.5
±30
5
0.610
0.612
1.606
0.618
1.617
0.610
0.612
1.836
0.618
1.847
0.5
UNITS
V
V
nA
μA
V
V
V
V
V
V
V
V
V
V
%/V
%
Regulated Feedback Voltage (Channel 1) LTC3419E, 0°C < T
J
< 85°C
LTC3419E, –40°C < T
J
< 85°C
LTC3419E-1, –40°C < T
J
< 85°C
LTC3419I, –40°C < T
J
< 125°C
LTC3419I-1, –40°C < T
J
< 125°C
Regulated Feedback Voltage (Channel 2) LTC3419E, 0°C < T
J
< 85°C
LTC3419E, –40°C < T
J
< 85°C
LTC3419E-1, –40°C < T
J
< 85°C
LTC3419I, –40°C < T
J
< 125°C
LTC3419I-1, –40°C < T
J
< 125°C
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input DC Supply Current
Active Mode (Note 4)
Sleep Mode
Shutdown
Oscillator Frequency
Peak Switch Current Limit
Channel 1 (600mA)
Channel 2 (600mA)
Channel 1 (Note 5)
Top Switch On-Resistance
Bottom Switch On-Resistance
Channel 2 (Note 5)
Top Switch On-Resistance
Bottom Switch On-Resistance
Switch Leakage Current
Soft-Start Time
RUN Threshold High
RUN Leakage Current
MODE Threshold High
MODE Leakage Current
Output Ripple in Burst Mode Operation
V
OUT
= 1.5V, C
OUT
= 10μF
V
IN
= 2.5V to 5.5V (Note 7)
I
LOAD
= 0mA to 600mA (Note 7)
V
FB1
= V
FB2
= 0.95
×
V
FBREG
V
FB1
= V
FB2
= 1.05
×
V
FBREG
, V
IN
= 5.5V
RUN1 = RUN2 = 0V, V
IN
= 5.5V
V
FB
= V
FBREG
V
IN
= 3V, V
FB
< V
FBREG
, Duty Cycle < 35%
0.590
0.588
1.544
0.582
1.533
0.590
0.588
1.764
0.582
1.753
0.600
0.600
1.575
0.6
1.575
0.600
0.600
1.8
0.6
1.8
0.3
0.5
500
35
0.1
V
FBREG2
ΔV
LINE REG
ΔV
LOAD REG
I
S
700
60
1
2.7
μA
μA
μA
MHz
mA
mA
f
OSC
I
LIM
●
1.8
900
900
2.25
1200
1200
0.4
0.4
0.4
0.4
0.01
R
DS(ON)
V
IN
= 3.6V, I
SW
= 100mA
V
IN
= 3.6V, I
SW
= 100mA
V
IN
= 3.6V, I
SW
= 100mA
V
IN
= 3.6V, I
SW
= 100mA
V
IN
= 5V, V
RUN
= 0V
V
FB
from 10% to 90% Full Scale
●
●
●
●
0.6
0.6
0.6
0.6
1
1.3
1.2
1
1.2
1
Ω
Ω
Ω
Ω
μA
ms
V
μA
V
μA
mV
P-P
I
SW(LKG)
t
SOFTSTART
V
RUN
I
RUN
V
MODE
I
MODE
V
BURST
0.1
0.4
0.4
0.95
1
0.01
1
0.01
20
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:
Guaranteed by long term current density limitations.
Note 3:
The LTC3419E and LTC3419E-1 are guaranteed to meet specified
performance from 0°C to 85°C. Specifications over the –40°C to 125°C
operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3419I and LTC3419I-1 are guaranteed to meet specified performance
over the full –40°C to 125°C operating junction temperature range.
Note 4:
Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5:
The DFN switch on-resistance is guaranteed by correlation to
wafer level measurements.
Note 6:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 7:
The converter is tested in a proprietary test mode that connects
the output of the error amplifier to the SW pin, which is connected to an
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