LTC4223-1/LTC4223-2
3
422312f
ELECTRICAL CHARACTERISTICS
 
The ?/SPAN> denotes the speci cations which apply over the full operating
temperature range, otherwise speci cations are T
A
 = 25癈, V
CC
 = 3.3V, V
AUXIN
 = 3.3V, V
12VIN
 =12V, unless otherwise speci ed. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supplies
V
DD
Input Supply Range
V
CC
AUXIN
12V
IN
?/DIV>
?/DIV>
?/DIV>
2.7
2.7
10
6
6
14
V
V
V
I
DD
Input Supply Current
V
CC
AUXIN
12V
IN
?/DIV>
?/DIV>
?/DIV>
0.8
0.4
0.6
2
1
1
mA
mA
mA
V
DD(UVLO)
Input Supply Undervoltage Lockout
V
CC
 Rising
V
AUXIN
 Rising
V
12VIN
 Rising
?/DIV>
?/DIV>
?/DIV>
2.3
2.4
9.4
2.45
2.5
9.7
2.6
2.6
10
V
V
V
DD(UVLO,
HYST)
Input Supply Undervoltage Lockout
Hysteresis
V
CC
AUXIN
12V
IN
?/DIV>
?/DIV>
?/DIV>
40
70
70
110
110
110
180
150
150
mV
mV
mV
Current Limit
SENSE(CB)
Circuit Breaker Trip Sense Voltage,
(V
12VIN
  V
12VSENSE
)
?/DIV>
47.5
50
52.5
mV
SENSE(ACL)
Active Current Limit Sense Voltage,
(V
12VIN
  V
12VSENSE
)
?/DIV>
54
60
66
mV
I
AUX(ACL)
AUXOUT Active Current Limit
V
AUXOUT
 = 0V
?/DIV>
165
240
330
mA
Integrated Switch
R
DS(ON)
Switch Resistance
(V
AUXIN
  V
AUXOUT
)/I
AUXOUT
I
AUXOUT
 = 150mA (Note 4)
?/DIV>
0.3
0.5
?/DIV>
Gate Drive
GATE
External N-Channel Gate Drive
(V
12VGATE
  V
12VOUT
)
(Note 3)
?/DIV>
4.5
6.2
7.9
V
I
GATE(UP)
External N-Channel Gate Pull-Up Current
Gate Drive On, V
12VGATE
 = 0V
?/DIV>
7
10
14
I
GATE(DN)
External N-Channel Gate Pull-Down Current
Gate Drive Off
V
12VGATE
 = 17V, V
12VOUT
 = 12V
?/DIV>
0.5
1
2
mA
I
GATE(FPD)
External N-Channel Gate Fast Pull-Down
Current
Fast Turn Off
V
12VGATE
 = 17V, V
12VOUT
 = 12V
?/DIV>
90
160
250
mA
Current Sense
G
12IMON
12IMON Pin Gain Ratio
12IMON
/?V
12VIN
  V
12VSENSE
)
(V
12VIN
  V
12VSENSE
) = (75mV, 25mV)
?/DIV>
30
33
36
V/V
V
12IMON
12IMON Pin Output Voltage
(V
12VIN
  V
12VSENSE
) = 75mV, V
CC
 = 2.7V
?/DIV>
2.25
2.475
2.7
V
SENSE(MAX)
12IMON Pin Maximum Input Sense Voltage
?/DIV>
82.5
mV
V
12IMON(CLP)
12IMON Pin Clamp Voltage
(V
12VIN
  V
12VSENSE
) = 150mV, V
CC
 = 2.7V    ?/SPAN>
2.9
3.2
3.5
V
R
12IMON
12IMON Pin Output Resistance
(V
12VIN
  V
12VSENSE
) = 0V
?/DIV>
115
165
215
k?/DIV>
V
12IMON(MIN)
12IMON Pin Minimum Output Voltage
(V
12VIN
  V
12VSENSE
) = 0V
?/DIV>
0
130
mV
Comparator Inputs
V
PG(TH)
Power Good Threshold Voltage
V
12VOUT
 Falling
V
AUXOUT
 Falling
?/DIV>
?/DIV>
10
2.8
10.3
2.885
10.6
2.97
V
V
V
PG(HYST)
Power Good Hysteresis
V
12VOUT
V
AUXOUT
?/DIV>
?/DIV>
20
5
60
16
110
30
mV
mV
V
TMR(TH)
TIMER Pin Threshold Voltage
V
TIMER
 Rising
V
TIMER
 Falling
?/DIV>
?/DIV>
1.198
0.15
1.235
0.2
1.272
0.25
V
V
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