LTC4222
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
TC4222CG#PBF
LTC4222IG#PBF
LTC4222CUH#PBF
LTC4222IUH#PBF
LTC4222CG#TRPBF
LTC4222IG#TRPBF
LTC4222CUH#TRPBF
LTC4222IUH#TRPBF
LTC4222CG
LTC4222IG
LTC4222
36-Lead Plastic SSOP
36-Lead Plastic SSOP
32-Lead (5mm × 5mm) Plastic QFN
32-Lead (5mm × 5mm) Plastic QFN
0°C to 70°C
–40°C to 85°C
0°C to 70°C
LTC4222
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VDD = 12V unless otherwise noted.
SYMBOL
Supplies
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
l
l
l
l
l
l
l
l
V
Input Supply Range
2.9
29
1.2
4
V
mA
mA
V
DDn
DD1
DD2
I
I
V
V
Input Supply Current
Input Supply Current
V
V
V
= 12V
0.85
3
DD1
DD2
DD1
= 12V, I
= 0mA
DD2
INTVCC
V
V
Input Supply Undervoltage Lockout
Input Supply Undervoltage Lockout Hysteresis
Internal Regulator Voltage
Rising
DD
2.34
60
2.43
80
2.53
100
3.45
2.73
65
DDn(UVL)
mV
V
DDn(HYST)
INTV
INTV
INTV
I
= 0mA
3.15
2.55
35
3.3
2.64
50
CC
INTVCC
INTV Undervoltage Lockout
INTV Rising
V
CC(UVL)
CC(HYST)
CC
CC
INTV Undervoltage Lockout Hysteresis
mV
CC
Current Limit and Circuit Breaker (Both Channels)
l
ΔV
SENSE(TH)
Circuit Breaker Threshold (V – V )
SENSE
47.5
48.75
50
50
52.5
51.25
mV
mV
DD
l
l
l
ΔV
SENSE
Current Limit Voltage (V – V
)
V
V
= 1.3V
= 0V
46
14
130
50
16.6
150
54
19
165
mV
mV
mV
DD
SENSE
FB
FB
Start-Up Timer Expired
l
l
t
I
OC Fault Filter
ΔV
= 100mV
10
0
20
20
30
40
μs
D(OC)
SENSE
+ –
SENSE / Pin Input Current
V
SENSE
= 12V
μA
SENSE(IN)
Gate Drive
l
ΔV
GATE
External N-Channel Gate Drive
GATE
V = 2.9V to 29V
DD
4.7
5.9
6.5
V
(V
– V
) (Note 3)
SOURCE
l
l
l
I
I
I
External N-Channel Gate Pull-Up Current
External N-Channel Gate Pull-Down Current
Gate On, V
Gate Off, V
= 0V
–8
–12
1
–18
1.5
μA
mA
mA
GATE(UP)
GATE(DN)
GATE(LIM)
GATE
= 15V
0.8
GATE
Pull-Down Current from GATE to SOURCE
During OC/UVLO
V
= 15V, (V – V )n = 200mV
SENSE
450
GATE
DD
l
l
t
(V – SENSE) High to GATE Low
V
V
– SENSE = 200mV, C = 10nF
GATE
0.5
4.3
1
μs
V
PHL(SENSE)
DD
DD
V
(GATE-SOURCE) Voltage for Power Bad Fault
= 2.9V to 29V
3.8
4.7
GS(POWERBAD)
SOURCE
Comparator Inputs
l
V
CONFIG, EN, FB, ON, OV and UV Input
Threshold
V
Rising
IN
1.215
1.235
1.255
V
INPUT(TH)
l
l
ΔV
ΔV
CONFIG, EN, ON Hysteresis
80
2
128
7
180
20
mV
mV
CONFIG,EN,ON(HYST)
FB Power Good Hysteresis
FB(HYST)
4222f
3