Datasheet

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