EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
MSE PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 43°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
LTC3600EDD#PBF
LTC3600IDD#PBF
LTC3600EMSE#PBF
LTC3600IMSE#PBF
TAPE AND REEL
LTC3600EDD#TRPBF
LTC3600IDD#TRPBF
LTC3600EMSE#TRPBF
LTC3600IMSE#TRPBF
http://www.linear.com/product/LTC3600#orderinfo
PART MARKING*
LFXB
LFXB
3600
3600
PACKAGE DESCRIPTION
12-Lead (3mm × 3mm) Plastic DFN
12-Lead (3mm × 3mm) Plastic DFN
12-Lead Plastic MSOP
12-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/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
2
3600fd
LTC3600
elecTrical characTerisTics
SYMBOL
V
IN
ISET
PARAMETER
V
IN
Supply Range
I
SET
Reference Current
l
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
= 12V, unless otherwise noted.
CONDITIONS
MIN
4
49.5
49.3
50
50
0.02
340
0.25
–3
l
TYP
MAX
15
50.5
51
0.05
UNITS
V
µA
µA
%/V
mV
µA
I
SET
Line Regulation
I
SET
DROP_OUT Voltage
I
SET
Load Regulation
Error Amp Input Offset
Error Amp Load Regulation
Minimum V
OUT
Voltage
g
m
(EA)
t
ON(MIN)
t
OFF(MIN)
I
LIM
R
TOP
R
BOTTOM
V
UVLO
V
RUN
Error Amplifier Transconductance
Minimum On-Time
Minimum Off-Time
Current Limit
Negative Current Limit
Top Power NMOS On-Resistance
Bottom Power NMOS On-Resistance
INTV
CC
Undervoltage Lockout Threshold
UVLO Hysteresis
Run Threshold
Run Hysteresis
RUN Pin Leakage
V
INTVCC
OV
UV
Internal V
CC
Voltage
INTV
CC
Load Regulation
Output Overvoltage PGOOD Upper
Threshold
Output Undervoltage PGOOD Lower
Threshold
PGOOD Hysteresis
PGOOD Pull-Down Resistance
PGOOD Leakage Current
V
MODE/SYNC
MODE/SYNC Threshold
INTV
CC
Rising
INTV
CC
Falling
RUN Rising
RUN Falling
RUN = 12V
5.5V < V
IN
< 15V
I
LOAD
= 0mA to 20mA
PGFB Rising
PGFB Falling
PGFB Returning
1mA Load
PGOOD = 5V
MODE V
IL(MAX)
MODE V
IH(MIN)
SYNC V
IH(MIN)
SYNC V
IL(MAX)
MODE = 5V
R
T
= 36.1k
V
IN
Rising
V
IN
Falling
(Note 3)
Mode = 0, R
T
= 36.1k
Run = 0
V
ISET
= 0, R
OUT
= 0
I
SET
> 45µA, V
IN
– V
SET
I
OUT
= 0 to 1.5A
(Note 4)
l
3
0.05
10
0.63
30
130
0.9
0.1
mV
%
mV
mS
ns
ns
l
1.6
2
–0.9
200
100
3.45
150
2.4
A
A
mΩ
mΩ
3.7
1.8
2
5.4
0.680
0.590
V
mV
V
V
µA
V
%
V
V
mV
Ω
l
1.55
0.13
0
4.8
0.620
0.520
5
0.3
0.645
0.555
10
200
1
4.3
2.5
9.5
l
µA
V
V
V
V
µA
MHz
kΩ
V
V
0.4
0.4
1
600
17.5
16
700
0
1100
1.5
1.06
MODE/SYNC Pin Current
f
OSC
V
INOV
I
Q
Switching Frequency
V
OUT
Pin Resistance to Ground
V
IN
Overvoltage Lockout
Input DC Supply Current
Discontinuous
Shutdown
0.92
µA
µA
3600fd
3
LTC3600
elecTrical characTerisTics
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. Absolute Maximum Ratings are those values
beyond which the life of a device may be impaired.
Note 2:
The LTC3600 is tested under pulsed load conditions such that
T
J
≈
T
A
. The LTC3600E is guaranteed to meet performance 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 LTC3600I is guaranteed over the full –40°C to 125°C operating
junction temperature range. 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
impedance and other environmental factors. 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 3:
Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 4:
The LTC3600 is tested in a feedback loop that adjusts V
OUT
to
achieve a specified error amplifier output voltage (I
TH
).
Note 5:
This IC includes overtemperature protection that is intended
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 6:
Duration of voltage transient is less than 20ns for each switching
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