LTM4641
ELECTRICAL CHARACTERISTICS
SYMBOL
V
VING
PARAMETER
Gate Drive Voltage for Power-
Interrupt MOSFET, MSP
Power-Interrupt MOSFET Drive
V
IN
= 4.5V, 0A ≤ I
OUT
≤ 10A, V
ING
Sourcing 1µA
V
IN
= 28V, 0A ≤ I
OUT
≤ 10A, V
ING
Sourcing 1µA
V
IN
= 38V, 0A ≤ I
OUT
≤ 10A, V
ING
Sourcing 1µA
V
IN
= 4V (Ramped Down from 4.5V), I
OUT
= 0A,
V
ING
Sourcing 1µA
V
ING
Tied to V
INGP
, and:
V
IN
= 4.5V, V
ING
Pulled to 6.5V
V
IN
= 28V, V
ING
Pulled to 30V
V
ING
Tied to V
INGP
, Pulled to 33V, and:
RUN Pulled to 0V (CROWBAR Inactive)
OV
PGM
Pulled to 0V (CROWBAR Active)
OV
PGM
Driven from 650mV to 550mV, V
ING
Discharge Response Time
V
INGP
Driven to (V
INH
+ 10V)
V
INGP
-to-V
INH
Differential Voltage; I
VINGP
= 5mA
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
The
l
denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= V
INH
= V
INL
= 28V, per the typical application
shown in Figure 45, unless otherwise noted.
CONDITIONS
MIN
11.5
35
45
10.5
TYP
13.3
38.4
48.4
11.5
MAX
15.5
41
51.5
14.2
UNITS
V
V
V
V
I
VING(UP)
I
VING_DOWN(CROWBAR
ACTIVE,CROWBAR
INACTIVE)
V
ING
Pull-Up Current
V
ING
Pull-Down Current
V
ING
OVP Pull-Down Delay
Zener Diode Leakage Current
Zener Diode Breakdown Voltage
l
l
l
l
l
350
425
3
24
475
550
20
27
1.3
1
15
600
675
30
30
2.6
µA
µA
mA
mA
µs
nA
V
t
VING(OVP_DELAY)
I
VINGP(LEAK)
V
INGP(CLAMP)
V
OVPGM
I
OVPGM(UP)
I
OVPGM(DOWN)
OVP
TH
OVP
ERR
t
CROWBAR(OVP_DELAY)
V
CROWBAR(OH)
V
CROWBAR(OL)
Fault Pins and Functions
Default Output Overvoltage Program OV
PGM
Electrically Open Circuit
Setting
OV
PGM
Pull-Up Current
OV
PGM
Pull-Down Current
Output Overvoltage Protection
Inception Threshold
Output Overvoltage Protection
Inception Error
CROWBAR Response Time
CROWBAR Output, Active High
Voltage
CROWBAR Output, Passive Low
Voltage
OV
PGM
= 0V
OV
PGM
= 1V
Ramping Up Differential V
OSNS+
-to-V
OSNS–
Difference Between OVP
TH
and V
OVPGM
(OVP
TH
-V
OVPGM
)
OVP
GM
Driven from 650mV to 550mV
OVP
GM
Pulled to 0V and:
I
CROWBAR
= –100μA, I
INTVCC
= –20mA
I
CROWBAR
= –4mA, I
INTVCC
= –20mA
I
CROWBAR
= 1μA
V
INL
Ramped Up from/Down to 0V
CROWBAR Ramped Up Until HYST Goes Logic
Low
RUN = 0V, T
A
= 25°C
RUN = 0V, T
A
= 125°C
(See Figure 10 for Reference)
Ramping TEMP Downward Until HYST Outputs
Logic Low
Ramping TEMP Upward Until HYST Outputs
Logic High
Ramping UVLO, OVLO or IOVRETRY Positive
Until HYST Toggles Its State
l
l
l
650
–2.07
0.945
647
–12
666
–2
1
666
0
400
680
–1.91
1.06
683
12
500
5
4.9
500
900
1.6
1010
mV
μA
μA
mV
mV
ns
V
V
mV
mV
V
mV
mV
mV
mV
mV
Voltage Until CROWBAR Outputs Logic High
4.3
4.2
4.65
4.55
260
550
V
CROWBAR(OVERSHOOT)
CROWBAR Peak Voltage Overshoot
at V
INL
Start-Up and Shutdown
V
CROWBAR(TH)
V
TEMP
OT
TH(INCEPTION)
OT
TH(RECOVER)
UVOV
TH
CROWBAR Latchoff Threshold
TEMP Voltage
1.4
950
1.5
980
585
438
514
500
TEMP Overtemperature Inception
Threshold
TEMP Overtemperature Recovery
Threshold
UVLO/OVLO/IOVRETRY
Undervoltage/Overvoltage Inception
Thresholds
428
501
488
448
527
512
4641f
6
LINER [ LINEAR TECHNOLOGY ]
