LTM4641
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full internal
operating teꢃperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = VINH = VINL = 28V, per the typical application
shown in Figure 45, unless otherwise noted.
SYꢁBOL
PARAꢁETER
CONDITIONS
ꢁIN
TYP
ꢁAX
UNITS
I
Output Current Limit
5.1kΩ Pull-Up from PGOOD to 5V Source, I
24
A
OUT(PK)
OUT
Ramped Up Until V
Below PGOOD Lower
OUT
Threshold, PGOOD Pulls Logic Low
I
Power Stage Input Current During
Output Short Circuit
V
Electrically Shorted to GND
45
mA
VINH(IOUT_SHORT)
OUT
Control Section
l
V
Differential Feedback Voltage from
OSNS
I
= 0A
591
600
609
mV
FB
OUT
+
–
V
to V
OSNS
I
TRACK/SS Pull-Up Current
FCB Threshold
V
= 0V
TRACK/SS
–0.45
0.76
–1
0.8
0
μA
V
TRACK/SS
V
0.84
1
FCB
I
t
t
FCB Pin Current
V
= 0.8V
FCB
μA
ns
ns
V
FCB
Minimum On-Time
Minimum Off-Time
(Note 4)
(Note 4)
43
75
ON(MIN)
OFF(MIN)
220
300
2.7
+
–
l
V
Remote Sense Pin-Pair Differential
Mode Input Range
Valid Differential V
(Use R
-to- V Range
OSNS
0
OSNS(DM)
OSNS
SET1B
= R
≤ 8.2k)
SET1A
–
+
l
l
V
Remote Sense Pin-Pair Common
Mode Input Range
Valid V
Valid V
(Use R
Common Mode Range
Common Mode Range
SET1B
–0.3
V
V
OSNS(CM)
OSNS
OSNS
3
= R
≤ 8.2k)
SET1A
+
R
+
Input Resistance
V
to GND
OSNS
16318 16400 16482
Ω
V
IN(VOSNS )
INTV , DRV , 1V
CC
CC
REF
l
V
Internal V Voltage
6V ≤ V ≤ 38V, INTV Not Connected to DRV ,
CC
5.1
5.3
5.4
INTVCC
CC
IN
CC
DRV = 5.3V
CC
INTV Load Regulation
RUN = 0V, INTV Not Connected to DRV ,
CC CC
∆V
CC
INTVCC(LOAD)
DRV = 5.3V and:
CC
V
INTVCC
I
I
Varied from 0mA to –20mA
Varied from 0mA to –30mA
–0.7
–1
2
3
%
%
INTVCC
INTVCC
l
V
INTV Voltage at Low Line
V
= 4.5V, R
fSET
= R
= 0Ω (~0.6V ,
OUT
4.2
4.3
V
INTVCC(LOWLINE)
CC
IN
SET1A
SET1B
R
Value Recommended in Table 1)
l
l
DRV
DRV Undervoltage Lockout
DRV Rising
3.9
3.2
4.05
3.35
4.2
3.5
V
V
CC(UVLO)
CC
CC
DRV Falling
CC
I
DRV Current
INTV Not Connected to DRV , DRV = 5.3V,
DRVCC
CC
CC
, R
CC
CC
to:
R
and R
Setting V
SET1A SET1B
SET2
OUT
≤ 10A
≤ 10A
1.8V , R
= 2MΩ, 0A ≤ I
= Open, 0A ≤ I
11
20
18
27
mA
mA
OUT fSET
OUT
OUT
6.0V , R
OUT fSET
(Use R
= R
≤ 8.2k)
SET1A
SET1B
l
l
V
1V DC Voltage Regulation
REF
I
I
= 0mA
0.985 1.000 1.015
0.980 1.000 1.020
V
V
1VREF(DC)
1VREF
1VREF
=
1mA
PGOOD Output
+
–
V
Power Good Window, Logic State
Transition Thresholds
Ramping Differential V
– V
Voltage:
PGOOD(TH)
OSNS
OSNS
Up, PGOOD Goes Logic Low → High
Up, PGOOD Goes Logic High → Low
Down, PGOOD Goes Logic Low → High
Down, PGOOD Goes Logic High → Low
533
645
621
525
556
660
644
540
579
675
667
555
mV
mV
mV
mV
+
–
V
V
Hysteresis
Differential V
– V Voltage Returning
OSNS
8
16
75
12
24
mV
mV
μs
PGOOD(HYST)
OSNS
l
Logic-Low Output Voltage
PGOOD Logic-Low Blanking Time
I
= 5mA
400
PGOOD(VOL)
PGOOD
+
–
t
Delay Between Differential V
Voltage Exiting PGOOD Valid Window to PGOOD
Going Logic Low (Note 4)
– V
OSNS OSNS
PGOOD(DELAY)
4641f
5
Linear [ Linear ]
