Reflow Peak Body Temperature ............................ 260°C
pin conFiguraTion
TOP VIEW
V
FB1
RUN1
RLIM
PGOOD1
SW1
1
2
3
4
5
11
GND
10 V
FB2
9 RUN2
8 PGOOD2
7 SW2
6 V
IN
TOP VIEW
V
FB1
RUN1
RLIM
PGOOD1
SW1
1
2
3
4
5
11
GND
10
9
8
7
6
V
FB2
RUN2
PGOOD2
SW2
V
IN
DD PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 40°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
MSE PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 45°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
LTC3619BEDD#PBF
LTC3619BIDD#PBF
LTC3619BEMSE#PBF
LTC3619BIMSE#PBF
TAPE AND REEL
LTC3619BEDD#TRPBF
LTC3619BIDD#TRPBF
LTC3619BEMSE#TRPBF
LTC3619BIMSE#TRPBF
PART MARKING*
LFFH
LFFH
LTFFJ
LTFFJ
PACKAGE DESCRIPTION
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead (3mm
×
3mm) Plastic DFN
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
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/
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 3)
SYMBOL
V
IN
V
UV
PARAMETER
V
IN
Operating Voltage Range
V
IN
Undervoltage Lockout
V
IN
Low to High
CONDITIONS
l
l
elecTrical characTerisTics
MIN
2.5
TYP
2.1
MAX
5.5
2.5
UNITS
V
V
3619bfb
2
LTC3619B
elecTrical characTerisTics
SYMBOL
I
FB
V
FBREG
ΔV
LINEREG
ΔV
LOADREG
I
S
f
OSC
I
LIM(PEAK)
I
INLIM
R
DS(ON)
PARAMETER
Feedback Pin Input Current
Feedback Voltage (Channels 1, 2)
V
FB
Line Regulation
V
FB
Load Regulation (Channel 1)
V
FB
Load Regulation (Channel 2)
Supply Current
Active Mode (Note 4)
Shutdown
Oscillator Frequency
Peak Switch Current Limit
Channel 1 (400mA)
Channel 2 (800mA)
Input Average Current Limit
LTC3619BE, –40°C < T
J
< 85°C (Note 7)
LTC3619BI, –40°C < T
J
< 125°C (Note 7)
V
IN
= 2.5V to 5.5V (Note 7)
I
LOAD
= 0mA to 400mA (Note 7)
I
LOAD
= 0mA to 800mA (Note 7)
V
FB1
= V
FB2
= 0.95
×
V
FBREG
V
RUN1
= V
RUN2
= 0V, V
IN
= 5.5V
V
FB
= V
FBREG
V
IN
= 5V, V
FB
< V
FBREG
, Duty Cycle <35%
RLIM = 116k
RLIM = 116k, LTC3619BE
RLIM = 116k, LTC3619BI
V
IN
= 5V, I
SW
= 100mA
V
IN
= 5V, I
SW
= 100mA
V
IN
= 5V, I
SW
= 100mA
V
IN
= 5V, I
SW
= 100mA
V
IN
= 5V, V
RUN
= 0V
V
FB
from 0.06V to 0.54V
l
l
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 3)
CONDITIONS
l
l
l
MIN
0.588
0.582
TYP
0.600
0.600
0.01
0.5
0.5
600
MAX
±30
0.612
0.618
0.25
UNITS
nA
V
V
%/V
%
%
875
1
2.7
µA
µA
MHz
mA
mA
1.8
550
1800
2.25
800
2400
475
475
475
0.45
0.35
0.27
0.25
0.01
l
l
450
437
427
500
513
523
mA
mA
mA
Ω
Ω
Ω
Ω
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
Power Good Threshold
I
SW(LKG)
t
SOFTSTART
V
RUN
I
RUN
PGOOD
1
1.3
1.2
1
µA
ms
V
µA
%
%
0.3
0.4
l
0.95
1
0.01
0V ≤ V
RUN
≤ 5V
Entering Window
V
FB
Ramping Up
V
FB
Ramping Down
Leaving Window
V
FB
Ramping Up
V
FB
Ramping Down
PGOOD Rising and Falling, V
IN
= 5V
–5
5
–7
7
9
–9
90
11
–11
30
±1
%
%
µs
Ω
µA
PGOOD Blanking
R
PGOOD
I
PGOOD
Power Good Blanking Time
Power Good Pull-Down On-Resistance
PGOOD Leakage Current
8
V
PGOOD
= 5V
15
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 LTC3619B is tested under pulsed load conditions such that
T
J
≈ T
A
. The LTC3619BE is guaranteed to meet performance specifications
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 LTC3619BI is guaranteed
to meet specified performance over the full –40°C to 125°C operating
junction temperature range. Note that the maximum ambient temperature
is determined by specific operating conditions in conjunction with board
layout, the rated package thermal resistance and other environmental
factors.
Note 4:
Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5:
The 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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