LTC1553LCSW#TRM Linear Technology, LTC1553LCSW#TRM Datasheet - Page 3

• Manufacturer Part Number: LTC1553LCSW#TRM
• Manufacturer: Linear Technology

Specifications of LTC1553LCSW#TRM

• Lead Free Status / RoHS Status: Not Compliant

The
temperature range.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: When I
diode. This pin can handle input currents greater than 100mA below GND
without latchup. In the positive direction, it is not clamped to V
Note 3: All currents into device pins are positive; all currents out of the
device pins are negative. All voltages are referenced to ground unless
otherwise specified.
Note 4: This parameter is guaranteed by correlation and is not tested
directly.
Note 5: The LTC1553L goes into the shutdown mode if VID0 to VID4 are
floating. Due to the internal pull-up resistors, there will be an additional
0.25mA/pin if any of the VID0 to VID4 pins are pulled low.
SYMBOL
I
I
I
I
t
t
t
t
t
V
V
V
t
t
DC
V
V
R
I
ELECTRICAL CHARACTERISTICS
IMAX
SS
SSIL
SSHIL
SSHIL
SINK
PWRGD
PWRBAD
FAULT
OT
r
NOL
OT
OTDD
SHDN
IH
IL
IN
, t
MAX
f
denotes specifications which apply over the full operating
PARAMETER
I
Soft Start Source Current
Maximum Soft Start Sink Current
Under Current Limit
Soft Start Sink Current Under Hard
Current Limit
Hard Current Limit Hold Time
Power Good Response Time
Power Good Response Time
FAULT Response Time
OT Response Time
Over-Temperature Trip Point
Over-Temperature Driver Disable
Shutdown
Driver Rise and Fall Time
Driver Nonoverlap Time
Maximum G1 Duty Cycle
VID0 to VID4 Input High Voltage
VID0 to VID4 Input Low Voltage
VID0 to VID4 Internal Pull-Up
Resistance
Digital Output Sink Current
MAX
FB
is taken below GND, it will be clamped by an internal
Sink Current
CONDITIONS
V
V
V
(Notes 8, 9), V
V
V
V
V
V
OUTEN , VID0 to VID4 = 0 (Note 10) (Figure 3)
OUTEN , VID0 to VID4 = 0 (Note 10) (Figure 3)
OUTEN , VID0 to VID4 = 0 (Note 10) (Figure 3)
OUTEN , VID0 to VID4 = 0 (Note 10) (Figure 3)
(Figure 4)
(Figure 4)
(Figure 4)
IMAX
SS
SENSE
SENSE
SENSE
SENSE
SENSE
SENSE
= 0V, V
= V
CC
= V
= 0V, V
= 0V, V
from 0V to Rated V
from Rated V
from Rated V
CC
or PV
OUT
IMAX
V
, V
SS
IMAX
CC
CC
IMAX
= 0V, V
IMAX
= V
.
= 5V, PV
= V
= 4V, V
CC
= V
OUT
OUT
CC
IFB
CC
, V
to 0V
to V
Note 6: Supply current in normal operation is dominated by the current
needed to charge and discharge the external FET gates. This will vary with
the LTC1553L operating frequency, supply voltage and the external FETs
used.
Note 7: The open-loop DC gain and transconductance from the SENSE pin to
COMP pin will be (G
Note 8: The current limiting amplifier can sink but cannot source current.
Under normal (not current limited) operation, the output current will be zero.
Note 9: Under typical soft current limit, the net soft start discharge current
will be 60 A (I
current ratio is designed to be 5.5:1.
Note 10: When VID0 to VID4 are all HIGH, the LTC1553L will be forced to
shut down internally. The OUTEN trip voltages are guaranteed by design for
all other input codes.
= V
, V
IFB
IFB
CC
OUT
CC
IFB
CC
= 12V, T
= 0V
from 5V (Note 4)
= 0V
SSIL
A
= 25 C, unless otherwise noted. (Note 3)
) + [–11 A(I
ERR
)(1.260/3.3) and (g
SS
)] 50 A. The soft start sink-to-source
MIN
150
– 15
200
200
0.5
1.9
1.6
30
20
15
30
77
10
10
2
mERR
TYP
– 11
180
500
500
500
100
1.7
60
45
40
90
85
20
1
2
)(1.260/3.3) respectively.
LTC1553L
1000
1000
MAX
2.12
220
150
150
1.8
0.8
0.8
– 8
60
90
2
UNITS
3
mA
mA
ms
k
ns
ns
%
A
A
A
V
V
V
V
V
s
s
s
s