lt4254cgn-trpbf Linear Technology Corporation, lt4254cgn-trpbf Datasheet - Page 3

• Manufacturer Part Number: lt4254cgn-trpbf
• Description: Positive High Voltage Hot Swap Controller With Open-circuit Detect
• Manufacturer: Linear Technology Corporation

Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
temperature range, otherwise specifications are at T
SYMBOL
I
I
I
I
V
D
V
I
t
t
t
t
t
ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR A CE CHARACTERISTICS
PWRGD
INFB
TIMERPU
TIMERPD
INRTR
PHLUV
PLHUV
PHLFB
PLHFB
PHLSENSE
THTIMER
RETRY(TH)
TIMER
17
15
13
11
9
5
7
–50
SENSE Pin Regulation Voltage
vs Temperature, FB = 0V
–25
PARAMETER
PWRGD Pin Leakage Current
FB Input Current
TIMER Pull-Up Current
TIMER Pull-Down Current
TIMER Shut-Down Threshold Voltage
Duty Cycle (RETRY Mode)
RETRY Threshold
RETRY Input Current
UV Low to GATE Low
UV High to GATE High
FB Low to PWRGD Low
FB High to PWRGD High
(V
CC
0
TEMPERATURE (°C)
– V
SENSE
25
50
) High to GATE Low
75
W
100
4254 G01
U
125
45
60
55
50
40
A
–50
= 25°C. V
SENSE Pin Regulation Voltage
vs Temperature, FB > 2V
CONDITIONS
V
FB = 4.5V
C
RETRY = GND
C
C
V
PWRGD
TIMER
GATE
GATE
CC
–25
The
– V
= 100pF
= 100pF
= 10nF
SENSE
●
= 36V
CC
0
TEMPERATURE (°C)
denotes the specifications which apply over the full operating
= 24V unless otherwise noted.
= 275mV
25
Note 2: An internal clamp limits the GATE pin to a maximum of 11V above
V
beyond the clamp voltage may damage the part.
CC
50
(under normal operating conditions). Driving this pin to a voltage
75
100
4254 G02
125
●
●
●
●
●
3.0
2.5
1.5
1.0
2.0
10
I
–120
CC
MIN
– 60
T
4.3
1.5
0.4
–1
A
1
= 25°C
vs V
15
CC
– 120
–0.1
4.65
TYP
–85
20
0.1
0.8
1.7
0.8
3.2
2.5
3
3
6
V
CC
25
(V)
LT4254
–180
MAX
–40
4.5
1.2
10
5
5
4
30
35
UNITS
4254fb
3
4254 G03
µA
µA
µA
µA
µA
µs
µs
µs
µs
µs
%
V
V
40