EXPOSED PAD (PIN 15) IS PGND, MUST BE SOLDERED TO PCB
MSE PACKAGE
16-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 40°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC3111EDE#PBF
LTC3111IDE#PBF
LTC3111HDE#PBF
LTC3111MPDE#PBF
LTC3111EMSE#PBF
LTC3111IMSE#PBF
LTC3111HMSE#PBF
LTC3111MPMSE#PBF
TAPE AND REEL
LTC3111EDE#TRPBF
LTC3111IDE#TRPBF
LTC3111HDE#TRPBF
LTC3111MPDE#TRPBF
LTC3111EMSE#TRPBF
LTC3111IMSE#TRPBF
LTC3111HMSE#TRPBF
LTC3111MPMSE#TRPBF
PART MARKING*
3111
3111
3111
3111
3111
3111
3111
3111
PACKAGE DESCRIPTION
14-Lead (4mm
×
3mm) Plastic DFN
14-Lead (4mm
×
3mm) Plastic DFN
14-Lead (4mm
×
3mm) Plastic DFN
14-Lead (4mm
×
3mm) Plastic DFN
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–55°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–55°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 nonstandard 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/
3111fa
2
For more information
www.linear.com/LTC3111
LTC3111
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= V
OUT
= PWM/SYNC = RUN = 5V unless otherwise
noted.
PARAMETER
Input Operating Range
V
IN
UVLO Threshold
V
IN
UVLO Hysteresis
V
CC
UVLO Threshold
V
CC
UVLO Hysteresis
Output Voltage Adjust Range
INTV
CC
Clamp Voltage
Quiescent Current—Burst Mode Operation
Quiescent Current—Shutdown
Feedback Voltage
Feedback Leakage
NMOS Switch Leakage
NMOS Switch On-Resistance
Input Current Limit
Peak Current Limit
Burst Current Limit
Burst Zero Current Threshold
Reverse Current Limit
Maximum Duty Cycle
Minimum Duty Cycle
SW1, SW2 Minimum Low Time
Frequency
SYNC Frequency Range
PWM/SYNC Threshold
RUN Threshold to Enable V
CC
RUN Threshold to Disable V
CC
RUN Threshold to Enable Switching
RUN Hysteresis
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 lifetimes.
Note 2:
The LTC3111 is tested under pulsed load conditions such that
T
J
≈ T
A
. The LTC3111E is guaranteed to meet specifications from
0°C to 85°C junction temperature. Specifications over the –40°C to
125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3111I is guaranteed to meet performance specifications from –40°C
Rising
Falling
Rising
Percentage of the Period SW2 is Low in Boost Mode
(Note 7)
Percentage of the Period SW1 is Low in Buck Mode
(Note 7)
(Note 7)
PWM/SYNC = 5V
(Note 6)
l
l
l
l
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
CONDITION
MIN
l
TYP
2.1
200
2.35
190
MAX
15
2.3
2.5
15
UNITS
V
V
mV
V
mV
V
V
µA
µA
V
nA
µA
mΩ
mΩ
2.5
1.9
2.2
2.5
3.9
4.2
55
0
Rising
Rising
l
l
V
IN
= 5V or 15V
FB = 1V, PWM/SYNC = 0V
RUN = V
OUT
= V
CC
= 0V, Not Including Switch Leakage
PWM Operation
FB = 0.8V
Switches A, B, C, D, V
IN
= V
OUT
= 15V
Switch A
Switch B, C, D
l
4.5
80
1
0.82
50
5
l
0.78
0.8
0
0.5
90
105
l
2.3
3
5.8
0.8
0.1
–1
3.7
A
A
A
A
A
%
PWM/SYNC = 0V
PWM/SYNC = 0V
85
90
0
160
%
ns
700
600
0.5
0.35
0.3
1.15
800
0.9
0.8
1.18
120
900
1500
1.5
1.15
1.23
kHz
kHz
V
V
V
V
mV
to 125°C junction temperature, the LTC3111H is guaranteed to meet
performance specifications from –40°C to 150°C junction temperature
and the LTC3111MP is guaranteed and tested to meet performance
specifications from –55°C to 150°C junction temperature. High junction
temperatures degrade operating lifetimes: operating lifetime is derated
for junction temperatures greater than 125°C. Note that the maximum
ambient temperature consistent with these specifications is determined by
specific operating conditions in conjunction with board layout, the rated
package thermal resistance and other environmental factors.
3111fa
For more information
www.linear.com/LTC3111
3
LTC3111
ELECTRICAL CHARACTERISTICS
Note 3:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperatures will exceed 150°C when overtemperature protection is
active. Continuous operation above the specified maximum operating
junction temperature may impair device reliability.
Note 4:
Voltage transients on the switch pins beyond the DC limit specified
in the Absolute Maximum Ratings, are non-disruptive to normal operation
when using good layout practices, as shown on the demo board or
described in the data sheet and application notes.
Note 5:
The junction temperature (T
J
in °C) is calculated from the ambient
temperature (T
A
in °C) and power dissipation (P
D
in Watts) according to
the formula:
T
J
= T
A
+ (P
D
•
θ
JA
)
where
θ
JA
(in °C/W) is the package thermal impedance.
Note 6:
SYNC frequency range is tested with a square wave. Operation
with 100ns minimum high or low time is assured by design.
Note 7:
Switch timing measurements are made in an open-loop test
configuration. Timing in the application may vary somewhat from these
values due to differences in the switch pin voltage during the non-overlap
durations when the switch pin voltage is influenced by the magnitude and
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