Datasheet

LTC4228-1/LTC4228-2
3
422812f
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4228CUFD-1#PBF LTC4228CUFD-1#TRPBF 42281
28-Lead (4mm × 5mm) Plastic QFN
0°C to 70°C
LTC4228CUFD-2#PBF LTC4228CUFD-2#TRPBF 42282
28-Lead (4mm × 5mm) Plastic QFN
0°C to 70°C
LTC4228IUFD-1#PBF LTC4228IUFD-1#TRPBF 42281
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
LTC4228IUFD-2#PBF LTC4228IUFD-2#TRPBF 42282
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
LTC4228CGN-1#PBF LTC4228CGN-1#TRPBF LTC4228GN-1 28-Lead Plastic SSOP 0°C to 70°C
LTC4228CGN-2#PBF LTC4228CGN-2#TRPBF LTC4228GN-2 28-Lead Plastic SSOP 0°C to 70°C
LTC4228IGN-1#PBF LTC4228IGN-1#TRPBF LTC4228GN-1 28-Lead Plastic SSOP –40°C to 85°C
LTC4228IGN-2#PBF LTC4228IGN-2#TRPBF LTC4228GN-2 28-Lead Plastic SSOP –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 T
A
= 25°C. V
IN
= 12V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supplies
V
IN
Input Supply Range
l
2.9 18 V
I
IN
Input Supply Current
l
2.5 5 mA
V
INTVCC
Internal Regulator Voltage I = 0, –500µA
l
4.5 5 5.6 V
V
INTVCC(UVL)
Internal V
CC
Undervoltage Lockout INTV
CC
Rising
l
2.1 2.2 2.3 V
∆V
INTVCC(HYST)
Internal V
CC
Undervoltage Lockout Hysteresis
l
30 60 90 mV
Ideal Diode Control
∆V
FWD(REG)
Forward Regulation Voltage (V
INn
– V
OUTn
)
l
10 25 40 mV
∆V
DGATE
External N-Channel Gate Drive
(V
DGATEn
– V
INn
)
IN < 7V, ∆V
FWD
= 0.1V, I = 0, –1µA
IN = 7V to 18V, ∆V
FWD
= 0.1V, I = 0, –1µA
l
l
5
10
7
12
14
14
V
V
∆V
DGATE(ST)
Diode MOSFET On Detect Threshold
STATUS Pulls Low, ∆V
FWD
= 50mV
l
0.3 0.7 1.1 V
I
CPO(UP)
CPOn Pull-Up Current CPO = IN = 2.9V
CPO = IN = 18V
l
l
–60
–50
–95
–85
–120
–110
µA
µA
I
DGATE(FPU)
DGATEn Fast Pull-Up Current
∆V
FWD
= 0.2V, ∆V
DGATE
= 0V, CPO = 17V
–1.5 A
I
DGATE(FPD)
DGATEn Fast Pull-Down Current
∆V
FWD
= –0.2V, ∆V
DGATE
= 5V
1.5 A
t
ON(DGATE)
DGATEn Turn-On Delay
∆V
FWD
= 0.2V, C
DGATE
= 10nF
l
0.25 0.5 µs
t
OFF(DGATE)
DGATEn Turn-Off Delay
∆V
FWD
= –0.2V, C
DGATE
= 10nF
l
0.2 0.5 µs
Hot Swap Control
∆V
SENSE(CB)
Circuit Breaker Trip Sense Voltage
(V
SENSEn
+
– V
SENSEn
–
)
l
47.5 50 52.5 mV
∆V
SENSE(ACL)
Active Current Limit Sense Voltage
(V
SENSEn
+
– V
SENSEn
–
)
l
55 65 75 mV
V
SENSE
+
(UVL)
SENSEn
+
Undervoltage Lockout SENSE
+
Rising
l
1.75 1.9 2.05 V
∆V
SENSE
+
(HYST)
SENSEn
+
Undervoltage Lockout Hysteresis
l
10 50 90 mV
I
SENSE
+
SENSEn
+
Input Current SENSE
+
= 12V
l
150 350 500 µA
I
SENSE
–
SENSEn
–
Input Current SENSE
–
= 12V
l
10 50 100 µA
∆V
HGATE
External N-Channel Gate Drive
(V
HGATEn
– V
OUTn
)
IN < 7V, I = 0, –1µA
IN = 7V to 18V, I = 0, –1µA
l
l
4.8
10
7
12
14
14
V
V