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LTC1421 数据表(PDF) 3 Page - Linear Technology

部件名 LTC1421
功能描述  Dual Supply Hot Swap Controller for Advanced Mezzanine Card
PDF  24 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC1421 数据表(HTML) 3 Page - Linear Technology

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LTC4223-1/LTC4223-2
3
422312f
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are TA = 25°C, VCC = 3.3V, VAUXIN = 3.3V, V12VIN =12V, unless otherwise specified. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supplies
VDD
Input Supply Range
VCC
AUXIN
12VIN
●
●
●
2.7
2.7
10
6
6
14
V
V
V
IDD
Input Supply Current
VCC
AUXIN
12VIN
●
●
●
0.8
0.4
0.6
2
1
1
mA
mA
mA
VDD(UVLO)
Input Supply Undervoltage Lockout
VCC Rising
VAUXIN Rising
V12VIN Rising
●
●
●
2.3
2.4
9.4
2.45
2.5
9.7
2.6
2.6
10
V
V
V
ΔVDD(UVLO,
HYST)
Input Supply Undervoltage Lockout
Hysteresis
VCC
AUXIN
12VIN
●
●
●
40
70
70
110
110
110
180
150
150
mV
mV
mV
Current Limit
ΔVSENSE(CB)
Circuit Breaker Trip Sense Voltage,
(V12VIN – V12VSENSE)
●
47.5
50
52.5
mV
ΔVSENSE(ACL)
Active Current Limit Sense Voltage,
(V12VIN – V12VSENSE)
●
54
60
66
mV
IAUX(ACL)
AUXOUT Active Current Limit
VAUXOUT = 0V
●
165
240
330
mA
Integrated Switch
RDS(ON)
Switch Resistance
(VAUXIN – VAUXOUT)/IAUXOUT
IAUXOUT = 150mA (Note 4)
●
0.3
0.5
Ω
Gate Drive
ΔVGATE
External N-Channel Gate Drive
(V12VGATE – V12VOUT)
(Note 3)
●
4.5
6.2
7.9
V
IGATE(UP)
External N-Channel Gate Pull-Up Current
Gate Drive On, V12VGATE = 0V
●
–7
–10
–14
μA
IGATE(DN)
External N-Channel Gate Pull-Down Current
Gate Drive Off
V12VGATE = 17V, V12VOUT = 12V
●
0.5
1
2
mA
IGATE(FPD)
External N-Channel Gate Fast Pull-Down
Current
Fast Turn Off
V12VGATE = 17V, V12VOUT = 12V
●
90
160
250
mA
Current Sense
G12IMON
12IMON Pin Gain Ratio
ΔV12IMON/Δ(V12VIN – V12VSENSE)
(V12VIN – V12VSENSE) = (75mV, 25mV)
●
30
33
36
V/V
V12IMON
12IMON Pin Output Voltage
(V12VIN – V12VSENSE) = 75mV, VCC = 2.7V
●
2.25
2.475
2.7
V
ΔVSENSE(MAX) 12IMON Pin Maximum Input Sense Voltage
●
82.5
mV
V12IMON(CLP)
12IMON Pin Clamp Voltage
(V12VIN – V12VSENSE) = 150mV, VCC = 2.7V
●
2.9
3.2
3.5
V
R12IMON
12IMON Pin Output Resistance
(V12VIN – V12VSENSE) = 0V
●
115
165
215
kΩ
V12IMON(MIN)
12IMON Pin Minimum Output Voltage
(V12VIN – V12VSENSE) = 0V
●
0
130
mV
Comparator Inputs
VPG(TH)
Power Good Threshold Voltage
V12VOUT Falling
VAUXOUT Falling
●
●
10
2.8
10.3
2.885
10.6
2.97
V
V
VPG(HYST)
Power Good Hysteresis
V12VOUT
VAUXOUT
●
●
20
5
60
16
110
30
mV
mV
VTMR(TH)
TIMER Pin Threshold Voltage
VTIMER Rising
VTIMER Falling
●
●
1.198
0.15
1.235
0.2
1.272
0.25
V
V



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