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
Power-Interrupt ꢁOSFET Drive
l
l
l
l
V
Gate Drive Voltage for Power-
Interrupt MOSFET, MSP
V
V
V
V
V
= 4.5V, 0A ≤ I
≤ 10A, V Sourcing 1µA
11.5
35
13.3
38.4
48.4
11.5
15.5
41
51.5
14.2
V
V
V
V
VING
IN
IN
IN
IN
OUT
OUT
OUT
ING
= 28V, 0A ≤ I
= 38V, 0A ≤ I
≤ 10A, V Sourcing 1µA
ING
≤ 10A, V Sourcing 1µA
45
ING
= 4V (Ramped Down from 4.5V), I
= 0A,
10.5
OUT
Sourcing 1µA
ING
I
I
V
V
V
Pull-Up Current
V
Tied to V
, and:
VING(UP)
ING
ING
ING
ING
V
V
INGP
ING
l
l
= 4.5V, V Pulled to 6.5V
350
425
475
550
600
675
µA
µA
IN
IN
= 28V, V Pulled to 30V
ING
Pull-Down Current
OVP Pull-Down Delay
V
Tied to V
, Pulled to 33V, and:
VING_DOWN(CROWBAR
ING
INGP
l
l
RUN Pulled to 0V (CROWBAR Inactive)
OV Pulled to 0V (CROWBAR Active)
3
24
20
27
30
30
mA
mA
ACTIVE,CROWBAR
INACTIVE)
PGM
l
t
OV
Driven from 650mV to 550mV, V
ING
1.3
2.6
µs
VING(OVP_DELAY)
PGM
Discharge Response Time
I
Zener Diode Leakage Current
V
V
Driven to (V + 10V)
1
nA
V
VINGP(LEAK)
INGP
INGP
INH
V
Zener Diode Breakdown Voltage
-to-V Differential Voltage; I = 5mA
VINGP
15
INGP(CLAMP)
INH
Fault Pins and Functions
l
V
Default Output Overvoltage Program OV
Setting
Electrically Open Circuit
650
666
680
mV
OVPGM
PGM
l
l
l
I
I
OV
OV
Pull-Up Current
OV
OV
= 0V
= 1V
–2.07
0.945
647
–2
1
–1.91
1.06
683
μA
μA
OVPGM(UP)
PGM
PGM
PGM
PGM
Pull-Down Current
OVPGM(DOWN)
+
–
OVP
Output Overvoltage Protection
Inception Threshold
Ramping Up Differential V
Voltage Until CROWBAR Outputs Logic High
-to-V
OSNS
666
mV
TH
OSNS
l
l
OVP
Output Overvoltage Protection
Inception Error
Difference Between OVP and V
–12
0
12
mV
ns
ERR
TH
OVPGM
(OVP -V
)
TH OVPGM
t
CROWBAR Response Time
OVP Driven from 650mV to 550mV
400
500
CROWBAR(OVP_DELAY)
GM
V
CROWBAR Output, Active High
Voltage
OVP Pulled to 0V and:
CROWBAR(OH)
GM
l
l
I
I
= –100μA, I
= –20mA
= –20mA
4.3
4.2
4.65
4.55
5
4.9
V
V
CROWBAR
CROWBAR
INTVCC
INTVCC
= –4mA, I
l
l
l
V
V
V
V
CROWBAR Output, Passive Low
Voltage
I
= 1μA
CROWBAR
260
550
1.5
500
900
1.6
mV
mV
V
CROWBAR(OL)
CROWBAR(OVERSHOOT)
CROWBAR(TH)
TEMP
CROWBAR Peak Voltage Overshoot
V
Ramped Up from/Down to 0V
INL
at V Start-Up and Shutdown
INL
CROWBAR Latchoff Threshold
CROWBAR Ramped Up Until HYST Goes Logic
Low
1.4
TEMP Voltage
RUN = 0V, T = 25°C
950
980
585
1010
mV
mV
A
A
RUN = 0V, T = 125°C
(See Figure 10 for Reference)
l
l
l
OT
OT
TEMP Overtemperature Inception
Threshold
Ramping TEMP Downward Until HYST Outputs
Logic Low
428
501
488
438
514
500
448
527
512
mV
mV
mV
TH(INCEPTION)
TEMP Overtemperature Recovery
Threshold
Ramping TEMP Upward Until HYST Outputs
Logic High
TH(RECOVER)
UVOV
UVLO/OVLO/IOVRETRY
Undervoltage/Overvoltage Inception Until HYST Toggles Its State
Thresholds
Ramping UVLO, OVLO or IOVRETRY Positive
TH
4641f
6
Linear [ Linear ]
