LTC4245
3
4245fa
The ?/SPAN> denotes the speci cations which apply over the full operating temperature
range, otherwise speci cations are at T
A
= 25癈. V
12VIN
= 12V, V
5VIN
= 5V, V
3VIN
= 3.3V, V
VEEIN
= 12V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supplies
I
DD
Input Supply Current
12V
IN
5V
IN
3V
IN
,
PRECHARGE Open
V
EEIN
?/DIV>
?/DIV>
?/DIV>
?/DIV>
3
0.5
0.6
0.5
5
1
1
1
mA
mA
mA
mA
V
UVL
Supply Undervoltage Lockout
12V
IN
5V
IN
, V
CFG
= 0V, Open
5V
IN
When V
CFG
= V
CC
, 3V
IN
V
EEIN
, V
CFG
= 0V
V
CC
Falling
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
10.2
4.25
2.7
10.2
3.4
10.5
4.38
2.8
10.5
3.8
10.8
4.5
2.9
10.8
4.2
V
V
V
V
V
V
CC
Internal Regulator Voltage
?/DIV>
5
5.5
6
V
Current Limit
擵
SNS(CB)
Circuit Breaker Trip Sense Voltage
   (V
12VIN
V
12VSENSE
)
   (V
5VIN
V
5VSENSE
)
   (V
3VIN
V
3VSENSE
)
   (V
VEESENSE
V
VEEIN
)
After Start-Up
?/DIV>
?/DIV>
?/DIV>
?/DIV>
45
22.5
22.5
40
50
25
25
50
55
27.5
27.5
60
mV
mV
mV
mV
擵
SNS(ACL)
Active Current Limit Sense Voltage
   (V
12VIN
V
12VSENSE
)
   (V
5VIN
V
5VSENSE
)
   (V
3VIN
V
3VSENSE
)
   (V
VEESENSE
V
VEEIN
)
After Start-Up
?/DIV>
?/DIV>
?/DIV>
?/DIV>
130
60
60
130
150
75
75
150
170
90
90
170
mV
mV
mV
mV
擵
SNS(FBL)
,
擵
SNS(FBH)
Foldback Current Limit Sense Voltage
   (V
12VIN
V
12VSENSE
)
   (V
5VIN
V
5VSENSE
)
   (V
3VIN
V
3VSENSE
)
   (V
VEESENSE
V
VEEIN
)
Start-Up, V
TIMER
= 0V
V
12VOUT
= 0V
V
12VOUT
= 12V
V
5VOUT
= 0V
V
5VOUT
= 5V
V
3VOUT
= 0V
V
3VOUT
= 3.3V
V
VEEOUT
= 0V
V
VEEOUT
= 12V
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
10
40
4
22
4
22
11
40
15
50
7.5
25
7.5
25
16
50
20
60
11
29
11
29
21
60
mV
mV
mV
mV
mV
mV
mV
mV
Gate Drive
擵
GATE
Gate Drive
Gate to Source
?/DIV>
5
6.2
7.5
V
I
GATE(UP)
Gate Pull-Up Current
Gate Drive On, 擵
GATE
= 0V
?/DIV>
16
20
24
糀
I
GATE(DN)
Gate Pull-Down Current
   12V
GATE
, 5V
GATE
, 3V
GATE
,
   V
EEGATE
Gate Drive Off, 擵
GATE
= 5V
V
OUT
= V
IN
V
VEEGATE
= 7V
?/DIV>
?/DIV>
0.9
1.7
1.3
3.5
1.7
5.3
mA
mA
I
GATE(FST)
Gate Fast Pull-Down Current
   12V
GATE
, 5V
GATE
   3V
GATE
   V
EEGATE
Fast Turn Off, 擵
GATE
= 5V
V
12VGATE
= 17V, V
5VGATE
= 10V
V
3VGATE
= 8.3V
V
VEEGATE
= 7V
?/DIV>
?/DIV>
?/DIV>
125
155
32
250
310
65
375
465
98
mA
mA
mA
Input/Output Pins
V
ON, BD_SEL#(TH)
ON, BD_SEL# Pin Threshold Voltage
V
ON
Rising, V
BD_SEL#
Rising
?/DIV>
1.21
1.235
1.26
V
擵
ON, BD_SEL#(HYST)
ON, BD_SEL# Pin Hysteresis
?/DIV>
70
120
170
mV
I
BD_SEL#(UP)
BD_SEL# Pull-Up Current
V
BD_SEL#
= 0V
?/DIV>
7
10
16
礎
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