EXPOSED PAD (PIN 29) IS PGND, MUST BE SOLDERED TO PCB
FE PACKAGE
28-LEAD PLASTIC TSSOP
T
JMAX
= 150°C,
θ
JA
= 21°C/W
EXPOSED PAD (PIN 29) IS PGND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
LTC3119EUFD#PBF
LTC3119IUFD#PBF
LTC3119EFE#PBF
LTC3119IFE#PBF
LTC3119HFE#PBF
LTC3119MPFE#PBF
TAPE AND REEL
LTC3119EUFD#TRPBF
LTC3119IUFD#TRPBF
LTC3119EFE#TRPBF
LTC3119IFE#TRPBF
LTC3119HFE#TRPBF
LTC3119MPFE#TRPBF
http://www.linear.com/product/LTC3119#orderinfo
PART MARKING*
3119
3119
3119
3119
3119
3119
PACKAGE DESCRIPTION
28-Lead (4mm
×
5mm) Plastic QFN
28-Lead (4mm
×
5mm) Plastic QFN
28-Lead Plastic Enhanced TSSOP
28-Lead Plastic Enhanced TSSOP
28-Lead Plastic Enhanced TSSOP
28-Lead Plastic Enhanced TSSOP
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 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.
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/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
3119fb
2
For more information
www.linear.com/LTC3119
LTC3119
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= PV
IN
= 12V, PV
OUT
= 5V, R
T
= 76.8k unless otherwise stated.
PARAMETER
Input Operating Voltage
Output Operating Voltage
V
CC
Undervoltage Lockout Threshold
V
CC
Undervoltage Lockout Hysteresis
Input Current in Shutdown
Input Current in Sleep
Oscillator Frequency
Oscillator Operating Frequency
PWM/SYNC Frequency Range
PWM/SYNC Logic Threshold
PWM/SYNC Pulse Width
PWM/SYNC Pin Current
Soft-Start Duration
Feedback Voltage
l
elecTrical characTerisTics
CONDITIONS
After Start-Up (Note 4)
V
CC
Rising
V
CC
Falling
RUN = 0V
FB = 0.9V
MIN
l
l
l
l
l
TYP
MAX
18
18
18
UNITS
V
V
V
V
V
mV
µA
µA
kHz
kHz
kHz
V
ns
nA
ms
mV
mV
nA
µS
V
V
µA
mV
2.5
0.25
0.8
2.18
2.35
2.25
60
2.4
3
31
l
l
l
900
400
400
0.3
100
1000
1100
2000
2000
l
0.7
1
6
1.1
50
803
811
50
1
1.24
Minimum Low or High Duration
787
779
795
795
1
120
Feedback Pin Current
Error Amplifier Transconductance
RUN Pin Logic Threshold
RUN Pin Comparator Threshold
RUN Pin Hysteresis Current
RUN Pin Hysteresis Voltage
PGOOD Threshold
PGOOD Hysteresis
PGOOD Pull Down Resistance
PGOOD Leakage
MPPC Pin Threshold
MPPC Pin Current
Inductor Current Limit
Burst Mode Operation Inductor
Current Limit
Maximum Duty Cycle
Minimum Duty Cycle
SW1, SW2 Minimum Low Time
(Note 3)
V
IN
> V
OUT
(Note 3)
Percentage of Period SW2 is Low in Boost Mode
Percentage of Period SW1 is High in Buck Mode
l
l
l
l
0.3
1.17
0.8
1.205
0.25
90
V
RUN
Rising
l
Percentage of FB Voltage Falling
Percentage of FB Voltage
V
PGOOD
= 18V
l
–9.5
–8
1.2
700
1
–6.5
2000
40
822
50
%
%
Ω
nA
mV
nA
A
A
%
%
ns
l
774
7
798
1
8
0.6
90
0
92
90
3119fb
For more information
www.linear.com/LTC3119
3
LTC3119
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= PV
IN
= 12V, PV
OUT
= 5V, R
T
= 76.8k unless otherwise stated.
PARAMETER
N-Channel Switch Resistance
CONDITIONS
Switch A (PV
IN
to SW1)
Switch B (SW1 to PGND)
Switch C (SW2 to PGND)
Switch D (SW2 to PV
OUT
)
PV
IN
= PV
OUT
= 18V, SW1 = SW2 = 0V, 18V
l
elecTrical characTerisTics
MIN
TYP
30
30
30
30
1
MAX
UNITS
mΩ
mΩ
mΩ
mΩ
N-Channel Switch Leakage
V
CC
Regulation Voltage
V
CC
Dropout Voltage
V
CC
Current Limit
V
CC
Reverse Current
10
3.85
µA
V
mV
mA
µA
3.55
180
3.70
90
5
V
CC
Current = 50mA, V
IN
= 3V
V
CC
= 5V, V
IN
= 3V
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:
The LTC3119 is tested under pulsed load conditions such
that T
J
≈ T
A
. The LTC3119E is guaranteed to meet specifications from
0°C to 85°C junction temperature. Specification over the –40°C to
125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3119I specifications are guaranteed over the –40°C to 125°C operating
junction temperature range. The LTC3119H specifications are guaranteed
over the –40°C to 150°C operating junction temperature range. The
LTC3119MP specifications are guaranteed and tested over the –55°C to
150°C operating junction temperature range. High temperatures degrade
operating lifetimes; operating lifetime is derated for junction temperatures
greater than 125°C.
Note 3:
Current measurements are performed when the LTC3119 is
not switching. The current limit values measured in operation will be
somewhat higher due to the propagation delay of the comparators.
Note 4:
Minimum input voltage is governed by the V
CC
UVLO threshold. If
V
CC
is maintained though external bootstrapping, the part will continue to
operate until power transfer to the output is no longer possible.
Note 5:
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 switch pin voltage is influenced by the magnitude and
direction of the inductor current.
Note 6:
This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. The maximum
rated junction temperature will be exceeded when this protection is active.
Continuous operation above the specified absolute maximum operating
junction temperature may impair device reliability or permanently damage
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