LTC3831 LINER [Linear Technology], LTC3831 Datasheet - Page 3

• Manufacturer Part Number: LTC3831
• Description: High Power Synchronous Switching Regulator Controller for DDR Memory Termination
• Manufacturer: LINER [Linear Technology]

Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
Note 3: Supply current in normal operation is dominated by the current
needed to charge and discharge the external FET gates. This will vary with
the LTC3831 operating frequency, operating voltage and the external FETs
used.
Note 4: The LTC3831EGN is guaranteed to meet performance
specifications from 0 C to 70 C. Specifications over the –40 C to 85 C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
range, otherwise specifications are at T
SYMBOL
V
V
I
I
I
R
t
t
DC
ELECTRICAL CHARACTERISTICS
IN
SS
SSIL
r
NOV
IH
IL
, t
+
MAX
f
PARAMETER
SHDN Input High Voltage
SHDN Input Low Voltage
SHDN Input Current
Soft-Start Source Current
Maximum Soft-Start Sink Current
Undercurrent Limit
R
Driver Rise/Fall Time
Driver Nonoverlap Time
Maximum TG Duty Cycle
+
Input Resistance
A
= 25 C. V
CC
, PV
CONDITIONS
V
V
V
PV
Figure 2, PV
Figure 2, PV
Figure 2, V
SHDN
SS
IMAX
CC1
CC1
The
= 0V, V
, PV
= V
= 8V
= V
CC
CC2
CC
FB
denotes specifications that apply over the full operating temperature
IMAX
, V
CC1
CC1
= 0V (Note 5), PV
= 5V, V
IFB
= PV
= PV
Note 5: Rise and fall times are measured using 10% and 90% levels. Duty
cycle and nonoverlap times are measured using 50% levels.
Note 6: Guaranteed by design, not subject to test.
Note 7: PV
at 95% maximum duty cycle and for the current limit protection circuit to
be active.
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: 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 opera-
tion above the specified maximum operating junction temperature may impair
device reliability.
= 0V, V
= 0V, V
CC2
CC2
R
IFB
+ = 2.5V, V
= 5V (Note 5)
= 5V (Note 5)
SS
CC1
= V
= V
CC
must be higher than V
CC1
CC
(Note 8),
= 8V
R
– = GND, unless otherwise noted. (Note 2)
CC
MIN
2.4
–8
25
91
by at least 2.5V for TG to operate
49.5
TYP
–12
120
0.1
1.6
80
95
LTC3831
MAX
–16
250
250
0.8
1
UNITS
3
3831f
mA
k
ns
ns
%
V
V
A
A