Datasheet

LTC4364-1/LTC4364-2
4
436412f
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 12V.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
TMR(R)
TMR Retry Threshold HGATE Rising (After 32 Cycles), V
CC
= 4V to 80V
l
0.125 0.15 0.175 V
∆V
TMR
Early Warning Timer Window V
TMR(G)
– V
TMR(F)
, V
CC
= 4V to 80V
l
75 100 125 mV
V
UV
UV Input Threshold UV Falling, V
CC
= 4V to 80V
l
1.22 1.25 1.28 V
V
UV(HYST)
UV Input Hysteresis
l
25 50 80 mV
V
UV(RST)
UV Reset Threshold UV Falling, V
CC
= 4V to 80V, LTC4364-1 Only
l
0.5 0.6 0.7 V
V
OV
OV Input Threshold OV Rising, V
CC
= 4V to 80V
l
1.22 1.25 1.28 V
V
OV(HYST)
OV Input Hysteresis 12 mV
I
IN
UV, OV Input Current UV, OV = 1.25V
UV, OV = –30V
l
l
0
–0.3
1
–0.6
µA
mA
V
OL
ENOUT, F LT Output Low I
SINK
= 0.25mA
I
SINK
= 2mA
l
l
0.1
0.5
0.3
1.3
V
V
I
LEAK
ENOUT, F LT Leakage Current ENOUT, F LT = 80V
l
0 2.5 µA
∆V
OUT(TH)
Out High Threshold (V
CC
– V
OUT
) ENOUT from Low to High
l
0.4 0.7 1 V
V
OUT(RST)
Out Reset Threshold ENOUT from High to Low
l
1.4 2.2 3 V
I
OUT
OUT Input Current V
CC
= OUT = 12V, SHDN Open
OUT = –15V
l
l
40
–4
80
–8
µA
mA
Output Current in Shutdown, I
SNS
+ I
OUT
V
CC
= SOURCE = SENSE = OUT = 12V, Shutdown
l
12 40 µA
V
SHDN
SHDN Input Threshold V
CC
= 4V to 80V
l
0.5 1.6 2.2 V
V
SHDN(FLT)
SHDN Pin Float Voltage V
CC
= 12V to 80V
l
2.3 4 6.5 V
I
SHDN
SHDN Input Current SHDN = 0.5V
Maximum Allowable Leakage, V
CC
= 4V
SHDN = –30V
l
l
–1 –3.3
–1.5
–120 –300
µA
µA
µA
D Retry Duty Cycle, Overvoltage
Retry Duty Cycle, Output Short
FB = 1.5V, V
CC
= 80V, OUT = 16V
∆V
SNS
= 60mV, V
CC
– OUT = 12V
l
l
0.125
0.075
0.2
0.12
%
%
t
OFF,HGATE(UV)
Undervoltage to HGATE Low Propagation
Delay
UV Steps from 1.5V to 1V
l
1.3 4 μs
t
OFF,HGATE(OV)
Overvoltage to HGATE Low Propagation
Delay
FB Steps from 1V to 1.5V
l
0.25 1 μs
t
OFF,HGATE(OC)
Overcurrent to HGATE Low Propagation
Delay
∆V
SNS
Steps from 0mV to 150mV, OUT = 0V
l
0.5 2 μs
Ideal Diode
ΔV
DGATE
DGATE Gate Drive, (V
DGATE
− V
SOURCE
) V
CC
= 4V, No Fault, I
DGATE
= 0µA, −1µA
V
CC
= 8V to 80V, No Fault, I
DGATE
= 0µA, −1µA
l
l
5
10
8.5
12
12
16
V
V
I
DGATE(UP)
DGATE Pin Pull-Up Current
DGATE = SOURCE = V
CC
= 12V, ∆V
SD
= 0.1V
l
–5 –10 –15 µA
I
DGATE(DN)
DGATE Pin Pull-Down Current
∆V
DGATE
= 5V, ∆V
SD
= –0.2V
∆V
DGATE
= 5V, Shutdown/Fault Turn-Off
l
l
60
0.4
130
1
mA
mA
∆V
SD
Ideal Diode Regulation Voltage,
(V
SOURCE
− V
SENSE
)
∆V
DGATE
= 2.5V, V
CC
= SOURCE = 12V
∆V
DGATE
= 2.5V, V
CC
= SOURCE = 4V
l
l
10
24
30
48
45
72
mV
mV
t
OFF(DGATE)
DGATE Turn-Off Propagation Delay
∆V
SD
Steps from 0.1V to –1V
l
0.35 1.5 μs
Note 1: Stress 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.
Note 2: All Currents into device pins are positive and all currents out
of device pins are negative. All voltages are referenced to GND unless
otherwise specified.
Note 3: Internal clamps limit the HGATE and DGATE pins to minimum of
10V above the SOURCE pin. Driving these pins to voltages beyond the
clamp may damage the device.