Datasheet

LTC4227
3
422712fa
For more information www.linear.com/LTC4227
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4227CUFD-1#PBF LTC4227CUFD-1#TRPBF 42271 20-Lead (4mm × 5mm) Plastic QFN 0°C to 70°C
LTC4227CUFD-2#PBF LTC4227CUFD-2#TRPBF 42272 20-Lead (4mm × 5mm) Plastic QFN 0°C to 70°C
LTC4227CUFD-3#PBF LTC4227CUFD-3#TRPBF 42273 20-Lead (4mm × 5mm) Plastic QFN 0°C to 70°C
LTC4227CUFD-4#PBF LTC4227CUFD-4#TRPBF 42274 20-Lead (4mm × 5mm) Plastic QFN 0°C to 70°C
LTC4227IUFD-1#PBF LTC4227IUFD-1#TRPBF 42271 20-Lead (4mm × 5mm) Plastic QFN –40°C to 85°C
LTC4227IUFD-2#PBF LTC4227IUFD-2#TRPBF 42272 20-Lead (4mm × 5mm) Plastic QFN –40°C to 85°C
LTC4227IUFD-3#PBF LTC4227IUFD-3#TRPBF 42273 20-Lead (4mm × 5mm) Plastic QFN –40°C to 85°C
LTC4227IUFD-4#PBF LTC4227IUFD-4#TRPBF 42274 20-Lead (4mm × 5mm) Plastic QFN –40°C to 85°C
LTC4227CGN-1#PBF LTC4227CGN-1#TRPBF 42271 16-Lead Plastic SSOP 0°C to 70°C
LTC4227CGN-2#PBF LTC4227CGN-2#TRPBF 42272 16-Lead Plastic SSOP 0°C to 70°C
LTC4227IGN-1#PBF LTC4227IGN-1#TRPBF 42271 16-Lead Plastic SSOP –40°C to 85°C
LTC4227IGN-2#PBF LTC4227IGN-2#TRPBF 42272 16-Lead Plastic SSOP –40°C to 85°C
Consult LT C Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LT C Marketing for information
on nonstandard 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 4 mA
V
INTVCC
Internal Regulator Voltage
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
SENSE
+
)
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
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
I
DGATE2(DN)
DGATE2 Off Pull-Down Current D2ON = 2V, ∆V
DGATE2
= 2.5V
l
40 100 200 µA
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
t
PLH(DGATE2)
D2ON Low to DGATE2 High
l
40 100 µs