EXPOSED PAD (PIN 13) IS PGND, MUST BE SOLDERED TO PCB
MSE PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 40°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 13) IS PGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC3863EMSE#PBF
LTC3863IMSE#PBF
LTC3863HMSE#PBF
LTC3863MPMSE#PBF
LTC3863EDE#PBF
LTC3863IDE#PBF
LTC3863HDE#PBF
LTC3863MPDE#PBF
TAPE AND REEL
LTC3863EMSE#TRPBF
LTC3863IMSE#TRPBF
LTC3863HMSE#TRPBF
LTC3863MPMSE#TRPBF
LTC3863EDE#TRPBF
LTC3863IDE#TRPBF
LTC3863HDE#TRPBF
LTC3863MPDE#TRPBF
PART MARKING*
3863
3863
3863
3863
3863
3863
3863
3863
PACKAGE DESCRIPTION
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead (4mm × 3mm) Plastic DFN
12-Lead (4mm × 3mm) Plastic DFN
12-Lead (4mm × 3mm) Plastic DFN
12-Lead (4mm × 3mm) Plastic DFN
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
Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications.
Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
Rev. B
2
For more information
www.analog.com
LTC3863
ELECTRICAL CHARACTERISTICS
SYMBOL
Input Supply
V
IN
V
UVLO
I
Q
Input Voltage Operating Range
Undervoltage Lockout
(V
IN
-V
CAP
) Ramping Up Threshold
(V
IN
-V
CAP
) Ramping Down Threshold
Hysteresis
PLLIN/MODE = 0V, FREQ = 0V,
V
FB
= 0.83V (No Load)
PLLIN/MODE = Open, FREQ = 0V,
V
FB
= 0.83V (No Load)
RUN = 0V
l
l
l
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C. (Note 4) V
IN
= 12V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
3.5
3.25
3.00
3.50
3.25
0.25
0.77
50
7
0.791
–0.005
–0.1
–0.015
1.8
–50
V
FB
= 0.77V
V
SENSE
= V
IN
V
RUN
Rising
V
SS
= 0V
R
FREQ
= 24.9kΩ
R
FREQ
= 64.9kΩ
R
FREQ
= 105kΩ
FREQ = 0V
FREQ = Open
l
l
l
l
l
TYP
MAX
60
3.8
3.50
UNITS
V
V
V
V
mA
µA
µA
V
%/V
%
mS
Input DC Supply Current
Pulse-Skipping Mode
Burst Mode Operation
Shutdown Supply Current
1.2
70
12
0.809
0.005
0.1
Output Sensing
V
REG
∆V
REG
∆V
IN
∆V
REG
∆V
ITH
g
m(EA)
I
FBN
V
ILIM
I
SENSE
V
RUN
V
RUNHYS
I
SS
f
Regulated Feedback Voltage V
REG
= (V
FB
– V
FBN
) V
ITH
= 1.2V (Note 5)
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
Error Amplifier Transconductance
Feedback Negative Input Bias Current
Current Limit Threshold (V
IN
-V
SENSE
)
SENSE Pin Input Current
RUN Pin Enable Threshold
RUN Pin Hysteresis
Soft-Start Pin Charging Current
Programmable Switching Frequency
V
IN
= 3.8V to 60V (Note 5)
V
ITH
= 0.6V to 1.8V (Note 5)
V
ITH
= 1.2V, ∆I
ITH
= ±5µA (Note 5)
0.800
–10
95
0.1
50
103
2
1.32
nA
mV
µA
V
mV
µA
kHz
kHz
kHz
kHz
kHz
kHz
V
V
%
ns
Current Sensing
85
Start-Up and Shutdown
1.22
1.26
150
10
105
440
810
350
535
Switching Frequency and Clock Synchronization
375
320
485
75
2
0.5
18
220
505
380
585
750
f
LO
f
HI
f
SYNC
V
CLK(IH)
V
CLK(LO)
f
FOLD
t
ON(MIN)
Low Switching Frequency
High Switching Frequency
Synchronization Frequency
Clock Input High Level into PLLIN/MODE
Clock Input Low Level into PLLIN/MODE
Foldback Frequency as Percentage of
Programmable Frequency
Minimum On-Time
V
FB
= 0V, FREQ = 0V
Rev. B
For more information
www.analog.com
3
LTC3863
ELECTRICAL CHARACTERISTICS
SYMBOL
Gate Driver
V
CAP
V
CAPDROP
Gate Bias LDO Output Voltage (V
IN
-V
CAP
)
Gate Bias LDO Dropout Voltage
I
GATE
= 0mA
V
IN
= 5V, I
GATE
= 15mA
9V ≤ V
IN
≤ 60V, I
GATE
= 0mA
Load = 0mA to 20mA
Gate High
Gate Low
GATE Going High without Delay,
V
FB(OV)
-V
FB(NOM)
in Percent
–3.5
2
0.9
10
l
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C. (Note 4) V
IN
= 12V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
7.6
TYP
8.0
0.2
0.002
MAX
8.5
0.5
0.03
UNITS
V
V
%/V
%
Ω
Ω
%
∆V
CAP(LINE)
Gate Bias LDO Line Regulation
∆V
CAP(LOAD)
Gate Bias LDO Load Regulation
R
UP
R
DN
Overvoltage
V
FBOV
V
FB
Overvoltage Lockout Threshold
Gate Pull-Up Resistance
Gate Pull-Down Resistance
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:
Continuous operation above the specified maximum operating
junction temperature may impair device reliability or permanently damage
the device.
Note 3:
The junction temperature (T
J
in °C) is calculated from the ambient
temperature (T
A
in °C) and power dissipation (P
D
in Watts) as follows:
T
J
= T
A
+ (P
D
•
θ
JA
)
where
θ
JA
(in °C/W) is the package thermal impedance provided in the Pin
Configuration section for the corresponding package.
Note 4:
The LTC3863 is tested under pulsed load conditions such that T
J
≈ T
A
. The LTC3863E is guaranteed to meet performance specifications
from 0°C to 85°C operating junction temperature range. The LTC3863E
specifications over the –40°C to 125°C operating junction temperature
range are assured by design, characterization and correlation with
statistical process controls. The LTC3863I is guaranteed to meet
performance specifications over the –40°C to 125°C operating junction
temperature range, the LTC3863H is guaranteed over the –40°C to 150°C
operating junction temperature range, and the LTC3863MP is guaranteed
and tested over the full –55°C to 150°C operating junction temperature
range. High junction temperatures degrade operating lifetimes; operating
lifetime is derated for junction temperatures greater than 125°C. The
maximum ambient temperature consistent with these specifications is
determined by specific operating conditions in conjunction with board
layout, the rated package thermal impedance and other environmental
factors.
Note 5:
The LTC3863 is tested in a feedback loop that adjust V
REG
or (V
FB
– V
FBN
) to achieve a specified error amplifier output voltage
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