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LTC4252-1 Datasheet(数据表) 3 Page - Linear Technology

部件型号  LTC4252-1
说明  Negative Voltage Hot Swap Controllers
下载  36 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
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LTC4252-1 Datasheet(HTML) 3 Page - Linear Technology

 
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LTC4252-1/LTC4252-2
LTC4252A-1/LTC4252A-2
3
425212fb
LTC4252-1/-2
LTC4252A-1/-2
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
VZ
VIN – VEE Zener Voltage
IIN = 2mA
11.5
13
14.5
11.5
13
14.5
V
rZ
VIN – VEE Zener Dynamic Impedance
IIN = 2mA to 30mA
5
5
IIN
VIN Supply Current
UV = OV = 4V, VIN = (VZ – 0.3V)
0.8
2
0.9
2
mA
VLKO
VIN Undervoltage Lockout
Coming Out of UVLO (Rising VIN)
9.2
11.5
9
10
V
VLKH
VIN Undervoltage Lockout Hysteresis
1
0.5
V
VCB
Circuit Breaker Current Limit Voltage
VCB = (VSENSE – VEE)
40
50
60
45
50
55
mV
VACL
Analog Current Limit Voltage
VACL = (VSENSE – VEE),
80
100
120
mV
SS = Open or 2.2V
VACL
Analog Current Limit Voltage
VACL = (VSENSE – VEE),
1.05
1.20
1.38
V/V
VCB
Circuit Breaker Voltage
SS = Open or 1.4V
VFCL
Fast Current Limit Voltage
VFCL = (VSENSE – VEE)
150
200
300
150
200
300
mV
VSS
SS Voltage
After End of SS Timing Cycle
2.2
1.4
V
RSS
SS Output Impedance
100
50
k
ISS
SS Pin Current
UV = OV = 4V, VSENSE = VEE,22
28
µA
VSS = 0V (Sourcing)
UV = OV = 0V, VSENSE = VEE,28
28
mA
VSS = 2V (Sinking)
VOS
Analog Current Limit Offset Voltage
10
10
mV
VACL+VOS Ratio (VACL + VOS) to SS Voltage
0.05
0.05
V/V
VSS
IGATE
GATE Pin Output Current
UV = OV = 4V, VSENSE = VEE,
40
58
80
40
58
80
µA
VGATE = 0V (Sourcing)
UV = OV = 4V, VSENSE – VEE = 0.15V,
17
17
mA
VGATE = 3V (Sinking)
UV = OV = 4V, VSENSE – VEE = 0.3V,
190
190
mA
VGATE = 1V (Sinking)
VGATE
External MOSFET Gate Drive
VGATE – VEE, IIN = 2mA
10
12
VZ
10
12
VZ
V
VGATEH
Gate High Threshold
VGATEH = VIN – VGATE, IIN = 2mA,
2.8
2.8
V
for PWRGD Status (MS Only)
VGATEL
Gate Low Threshold
(Before Gate Ramp-Up)
0.5
0.5
V
VUVHI
UV Pin Threshold HIGH
3.075 3.225 3.375
V
VUVLO
UV Pin Threshold LOW
2.775 2.925 3.075
V
VUV
UV Pin Threshold
Low-to-High Transition
3.05
3.08
3.11
V
VUVHST
UV Pin Hysteresis
(
for LTC4252A Only)
300
292
324
356
mV
VOVHI
OV Pin Threshold HIGH
5.85
6.15
6.45
V
VOVLO
OV Pin Threshold LOW
5.25
5.55
5.85
V
VOV
OV Pin Threshold
Low-to-High Transition
5.04
5.09
5.14
V
VOVHST
OV Pin Hysteresis
(
for LTC4252A Only)
600
82
102
122
mV
ISENSE
SENSE Pin Input Current
UV = OV = 4V, VSENSE = 50mV
–15
–30
–15
–30
µA
IINP
UV, OV Pin Input Current
UV = OV = 4V
±0.1 ±1
±0.1
±1
µA
VTMRH
TIMER Pin Voltage High Threshold
4
4
V
VTMRL
TIMER Pin Voltage Low Threshold
1
1
V
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)




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