LTC3719 LINER [Linear Technology], LTC3719 Datasheet - Page 3

• Manufacturer Part Number: LTC3719
• Description: 2-Phase, High Efficiency, Step-Down Controller for AMD Opteron CPUs
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
I
I
V
V
I
I
I
DF
TG1, 2 t
TG1, 2 t
BG1, 2 t
BG1, 2 t
TG/BG t
BG/TG t
t
Internal V
V
V
V
V
V
VID Parameters
V
R
ATTEN
R
VID
VID
VID
V
Q
RUN/SS
SCL
SDLHO
SENSE
ON(MIN)
RUN/SS
RUN/SSLO
INTVCC
LDO
LDO
EXTVCC
LDOHYS
BIAS
NO_CPU
ATTEN
PULLUP
MAX
THLOW
THHIGH
LEAK
INT
EXT
ERR
1D
2D
r
f
r
f
CC
Regulator
PARAMETER
Input DC Supply Current
Soft-Start Charge Current
RUN/SS Pin ON Threshold
RUN/SS Pin Latchoff Arming
RUN/SS Discharge Current
Shutdown Latch Disable Current
Total Sense Pins Source Current
Maximum Duty Factor
Top Gate Transition Time:
Bottom Gate Transition Time:
Top Gate Off to Bottom Gate On Delay
Synchronous Switch-On Delay Time
Bottom Gate Off to Top Gate On Delay
Top Switch-On Delay Time
Minimum On-Time
Internal V
INTV
EXTV
EXTV
EXTV
Operating Supply Voltage Range
Resistance Between ATTENIN
and ATTENOUT Pins
Resistive Divider Error
VID0 to VID4 Pull-Up Resistance
VID0 to VID4 Logic Threshold Low
VID0 to VID4 Logic Threshold High
VID0 to VID4 Leakage
NO_CPU Maximum Output Voltage
Rise Time
Fall Time
Rise Time
Fall Time
Normal Mode
Shutdown
CC
CC
CC
CC
Load Regulation
Voltage Drop
Switchover Voltage
Switchover Hysteresis
CC
Voltage
CONDITIONS
(Note 5)
V
V
V
V
Soft Short Condition V
V
Each Channel: V
In Dropout
(Note 6)
C
C
(Note 6)
C
C
C
C
Tested with a Square Wave (Note 7)
6V < V
I
I
I
I
(Note 8)
V
I
CC
CC
CC
CC
NO_CPU
RUN/SS
RUN/SS
RUN/SS
RUN/SS
EAIN
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
BIAS
= 0 to 20mA, V
= 20mA, V
= 20mA, EXTV
= 20mA, EXTV
A
= 0.5V
< VID0–VID4 < 7V
= 25 C. V
= 3300pF
= 3300pF
= 3300pF
= 3300pF
= 3300pF Each Driver (Note 6)
= 3300pF Each Driver (Note 6)
IN
= 2mA
= 0V
= 1.9V
Rising
Rising from 3V
< 30V, V
The
EXTVCC
SENSE1
IN
EXTVCC
CC
CC
EXTVCC
denotes the specifications which apply over the full operating
= 15V, V
Ramping Positive
Ramping Negative
= 5V
EAIN
–
, 2
= 4V
= 4V
– = V
= 0.5V, V
BIAS
SENSE1
= 5V, V
RUN/SS
+
, 2
+ = 0V
RUN/SS
= 4.5V
= 5V unless otherwise noted.
– 0.35
– 0.5
MIN
– 85
1.0
0.5
4.8
4.5
2.7
1.6
98
–1.2
99.5
TYP
– 60
180
1.2
1.5
4.1
1.6
5.0
0.2
4.7
0.2
30
40
30
20
90
90
20
80
10
40
2
LTC3719
MAX
0.25
160
1.9
4.5
5.2
1.0
5.5
0.4
0.4
40
90
90
90
90
4
5
1
sn3719 3719fs
UNITS
3
mA
mV
k
k
ns
ns
ns
ns
ns
ns
ns
%
%
%
A
A
V
V
A
A
A
V
V
V
V
V
V
A
V