LTC1421 LINER [Linear Technology], LTC1421 Datasheet - Page 3

• Manufacturer Part Number: LTC1421
• Description: Hot Swap Controller
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
SYMBOL
I
I
V
V
V
I
V
V
I
AC CHARACTERISTICS
t
t
t
t
t
t
t
t
t
t
t
t
The denotes specifications which apply over the full operating temperature
range.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are reference to ground unless otherwise
specified.
RAMP
CP
IN
PU
1
2
3
4
5
6
7
9
10
11
CHL
CLH
AUXVCC
IL
IH
OL
OH
V
V
GATEHI
GATELO
PARAMETER
RAMP Pin Output Current
Charge Pump Output Current
GATEHI N-Channel Gate Drive
GATELO N-Channel Gate Drive
Auxiliary V
Input Low Voltage
Input High Voltage
Input Current
Output Low Voltage
Output High Voltage
Logic Output Pull-Up Current
CON1 or CON2 to CPON
PWRGD to RESET
PWRGD to DISABLE
POR to CPON
PWRGD to RESET
POR to CPON
CON1 or CON2 to CPON
Short-Circuit Detect to FAULT
Short-Circuit Detect to CPON
POR to FAULT
Comparator High to Low
Comparator Low to High
CC
Output Voltage
V
CONDITIONS
Charge Pump On, V
Charge Pump On, GATEHI = 0V
GATELO = 0V
V
V
CON1, CON2, POR
CON1, CON2, POR
CON1, CON2, POR = GND
RESET, COMPOUT, PWRGD, DISABLE, FAULT,
I
CPON, I
DISABLE, I
CPON, I
RESET, PWRGD, FAULT = GND
Figure 1, C
Figure 1, R
Figure 1, C
Figure 1, C
Figure 1, R
Figure 1, C
Figure 1, C
Figure 1, R
V
Figure 2, C
V
Figure 2, R
COMP
R
COMP
R
O
GATEHI
GATELO
CCLO
CCLO
CCLO
L
L
= 3mA
= 10k to V
= 10k to V
= 5V, Unloaded
– SETLO = 0mV to 100mV
– SETLO = 0mV to 100mV
–
–
O
O
= 1.232V, 10mV Overdrive
= 1.232V, 10mV Overdrive
= 3mA
= – 1mA
V
V
V
L
L
L
L
L
L
O
L
L
L
L
OUTHI
CCHI
OUTLO
= 15pF
= 10k to V
= 15pF
= 15pF
= 10k to V
= 15pF
= 15pF
= 10k to V
= 15pF
= 10k to V
= – 3mA
CCLO
CCLO
= 12V, V
, C
, C
RAMP
L
L
= 15pF
= 15pF
CCLO
CCLO
CCLO
CCLO
Note 3: After power-on reset, the V
V
Note 4: After power-on reset, the V
before the charge pump is restarted.
TRIP
CCLO
, C
, C
, C
, C
0.4V
point before the charge pump is restarted.
L
L
L
L
= 15pF
= 15pF
= 15pF
= 15pF
= 5V, T
A
= 25 C unless otherwise noted (Note 2).
LTC1421/LTC1421-2.5
OUTLO
OUTLO
MIN
– 30
160
140
160
140
3.4
11
10
15
15
6
2
4
and V
has to drop below the V
– 600
– 300
– 60
– 15
0.25
TYP
200
200
200
200
4.5
OUTHI
17
20
20
32
50
50
20
20
20
1
have to drop below the
MAX
1.45
– 90
280
280
240
240
0.8
0.4
0.5
1.5
23
16
16
30
30
TRIP
UNITS
point
3
ms
ms
ms
ms
ms
ms
ns
ns
ns
A
A
A
V
V
V
V
V
A
V
V
V
V
A
s
s
s
s
s