EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB
MSE PACKAGE
16-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 38°C/W
EXPOSED PAD (PIN 17) IS SGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC3604EUD#PBF
LTC3604IUD#PBF
LTC3604EMSE#PBF
LTC3604IMSE#PBF
TAPE AND REEL
LTC3604EUD#TRPBF
LTC3604IUD#TRPBF
LTC3604EMSE#TRPBF
LTC3604IMSE#TRPBF
PART MARKING*
LFPT
LFPT
3604
3604
PACKAGE DESCRIPTION
16-Lead (3mm
×
3mm) Plastic QFN
16-Lead (3mm
×
3mm) Plastic QFN
16-Lead Plastic MSOP
16-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/
2
3604fa
For more information
www.linear.com/LTC3604
LTC3604
ELECTRICAL CHARACTERISTICS
SYMBOL
V
VIN
I
Q
PARAMETER
Input Supply Range
Input DC Supply Current
Forced Continuous Operation
Sleep Current
Shutdown
Feedback Reference Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
Feedback Pin Input Current
Error Amplifier Transconductance
Minimum On-Time
Minimum Off-Time
Valley Switch Current Limit
Negative Valley Switch Current Limit
Oscillator Frequency
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
J
= 25°C. V
VIN
= 12V, unless otherwise specified.
CONDITIONS
l
MIN
3.6
TYP
MAX
15
1000
500
25
0.606
UNITS
V
µA
µA
µA
l
0.594
V
V
FB
V
VIN
= 3.6V to 15V
%/V
∆V
LINEREG
ITH = 0.6V to 1.6V
%
∆V
LOADREG
V
FB
= 0.6V
±30
nA
I
FB
ITH = 1.2V
2.0
mS
g
m(EA)
V
ON
= 1V, V
IN
= 4V
20
ns
t
ON(MIN)
V
IN
= 6V
40
60
ns
t
OFF(MIN)
2.6
3.4
4.3
A
I
LIM
–1.7
A
V
RT
= INTV
CC
1.4
2
2.6
MHz
f
OSC
R
RT
= 160k
1.7
2
2.3
MHz
R
RT
= 80k
3.4
4
4.6
MHz
Top Switch On-Resistance
130
mΩ
R
DS(ON)
Bottom Switch On-Resistance
100
mΩ
l
V
IN
Overvoltage Lockout Threshold
V
IN
Rising
16.8
17.5
18
V
V
VIN(OV)
l
V
IN
Falling
15.8
16.5
17
V
INTV
CC
Voltage
3.6V < V
IN
< 15V
3.13
3.3
3.45
V
V
INTVCC
INTV
CC
Load Regulation (Note 4)
I
INTVCC
= 0mA to 20mA
0.6
%
∆INTV
CC
INTV
CC
Undervoltage Lockout
INTV
CC
Rising, V
IN
= INTV
CC
2.75
2.9
V
V
UVLO
Threshold
INTV
CC
Falling, V
IN
= INTV
CC
2.45
V
l
RUN Threshold
RUN Rising
1.21
1.25
1.29
V
V
RUN
l
RUN Falling
0.97
1.0
1.03
V
RUN Leakage Current
V
VIN
= 15V
0
±3
µA
I
RUN(LKG)
PGOOD Good-to-Bad Threshold
FB Rising
8
10
%
V
FB_GB
FB Falling
–8
–10
%
PGOOD Bad-to-Good Threshold
FB Rising
–3
–5
%
V
FB_BG
FB Falling
3
5
%
Power Good Filter Time
20
40
µs
t
PGOOD
PGOOD Pull-Down Resistance
10mA Load
15
Ω
R
PGOOD
Switch Leakage Current
V
RUN
= 0V
0.01
1
µA
I
SW(LKG)
Internal Soft-Start Time
V
FB
from 10% to 90% Full Scale
400
700
µs
t
SS
TRACK = 0.3V
0.28
0.3
0.315
mV
V
FB_TRACK
TRACK Pin
TRACK Pull-Up Current
1.4
µA
I
TRACK
l
MODE V
IH
1.0
V
V
MODE/SYNC
MODE Threshold Voltage
l
MODE V
IL
0.4
V
l
0.95
V
SYNC Threshold Voltage
SYNC V
IH
MODE Input Current
MODE = 0V
–1.5
µA
I
MODE
MODE = INTV
CC
1.5
µA
junction temperature range are assured by design, characterization, and
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
correlation with statistical process controls. The LTC3604I is guaranteed
may cause permanent damage to the device. Exposure to any Absolute
over the full –40°C to 125°C operating junction temperature range. The
Maximum Rating condition for extended periods may affect device
maximum ambient temperature is determined by specific operating
reliability and lifetime.
conditions in conjunction with board layout, the rated package thermal
Note 2:
The LTC3604E is guaranteed to meet performance specifications
resistance and other environmental factors.
from 0°C to 85°C. Specifications over the –40°C to 125°C operating
3604fa
MODE = 0V
MODE = INTV
CC
, V
FB
> 0.6V
RUN = 0V
700
300
14
0.600
0.01
0.1
For more information
www.linear.com/LTC3604
3
LTC3604
ELECTRICAL CHARACTERISTICS
Note 3:
T
J
is calculated from the ambient temperature, T
A
, and power
dissipation, P
D
, according to the following formula:
T
J
= T
A
+ (P
D
•
θ
JA
)
where
θ
JA
= 45°C/W for the QFN package and
θ
JA
= 38°C/W for the MSOP
package.
Note 4:
Maximum allowed current draw when used as a regulated output
is 5mA. This supply is only intended to provide additional DC load current
as needed and not intended to regulate large transient or AC behavior as
these waveforms may impact LTC3604 operation.
Note 5:
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
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