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
l
l
t
UVLO/OVLO/IOVRETRY/ TEMP
Response Time
50mV Overdrive (All Pins)
5mV Overdrive, UVLO/OVLO/IOVRETRY Pins
Only (Note 4)
25
125
100
500
µs
µs
UVOVD
UVOV
50
I
Input Current of UVLO, OVLO and
IOVRETRY
UVLO = 0.55V or OVLO = 0.45V or
IOVRETRY = 0.45V
30
nA
V
V
V
Housekeeping Circuitry UVLO
Voltage on INTV , INTV Rising (Note 4)
1.9
5
2
2.1
50
V
HOUSEKEEPING(UVLO)
HYST(SWITCHING ON)
HYST(SWITCHING OFF,
CC
CC
Hysteresis, INTV Returning (Note 4)
25
mV
CC
l
l
HYST Voltage (M
Logic High)
Off, RUN
Off, RUN
RUN Electrically Open Circuit
RUN = 1.8V
4.9
1.85
5.1
2.1
5.25
2.35
V
V
HYST
l
HYST Voltage (M
Logic Low)
RUN = 0V
170
350
480
mV
HYST
RUN)
l
V
HYST Voltage, Switching Action
Inhibited (M On)
UVLO < UVOV or OVLO > UVOV or
TH TH
30
65
mV
HYST(SWITCHING OFF,
FAULT)
IOVRETRY > UVOV or TEMP < OT
TH(INCEPTION)
HYST
TH
or CROWBAR > V
or
CROWBAR(TH)
UVLO(FALLING)
DRV < DRVCC
CC
(See Figures 62, 63)
l
TMR
Timeout and Power-On Reset Period
C
= 1nF, Time from Fault Clearing to HYST
5
9
14
ms
UOTO
TMR
Being Released by Internal Circuitry
l
l
l
l
l
l
l
l
V
V
LATCH Clear Threshold Input High
LATCH Clear Threshold Input Low
LATCH Input Current
1.2
V
V
LATCH(IH)
LATCH(IL)
LATCH
0.8
1
I
I
I
V
V
V
= 7.5V
= 1.6V
μA
μA
μA
mV
V
LATCH
TMR Pull-Up Current
= 0V
–1.2
1.2
–2.1
2.1
–2.8
2.8
TMR(UP)
TMR(DOWN)
TMR
TMR
TMR Pull-Down Current
V
Timer Disable Voltage
Referenced to INTV
–180
–270
TMR(DIS)
CC
OTBH
OTBH
OTBH Low Level Input Voltage
0.4
1.2
VIL
VZ
OTBH Pin Voltage When Left
Electrically Open Circuit
–10μA ≤ I
≤ 10μA
0.6
0.9
V
OTBH
l
I
Maximum OTBH Current
OTBH Electrically Shorted to SGND
30
μA
OTBH(MAX)
–40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LTM4641I is guaranteed over the –40°C to 125°C operating junction
temperature range. The LTM4641MP is tested and guaranteed over the
full –55°C to 125°C operating temperature range. Note that the maximum
ambient temperature consistent with these specifications is determined by
specific operating conditions in conjunction with board layout, the rated
package thermal impedance and other environmental factors.
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
The LTM4641 SW absolute maximum rating of 40V is verified in ATE by
regulating V
while at 40V , in a controlled manner guaranteed to not
OUT
IN
affect device reliability or lifetime. Static testing of SW leakage current at
40V is performed at control IC wafer level only.
IN
Note 3: See output current derating curves for different V , V
and T .
A
IN OUT
Note 2: The LTM4641 is tested under pulsed load conditions such that
Note 4: 100% tested at wafer level only.
T ≈ T . The LTM4641E is guaranteed to meet performance specifications
J
A
from 0°C to 125°C junction temperature. Specifications over the
4641f
7
Linear [ Linear ]
