LTC4227C ................................................ 0°C to 70°C
LTC4227I .............................................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
GN Package ...................................................... 300°C
pin conFiguraTion
TOP VIEW
DGATE1
HGATE
CPO1
OUT
TOP VIEW
DGATE1
16 NC
15 ON
21
14
EN
13 TMR
12
D2ON
11
FAULT
7
DGATE2
8
CPO2
9 10
NC
PWRGD
SENSE
–
SENSE
+
IN1
INTV
CC
GND
IN2
DGATE2
1
2
3
4
5
6
7
8
16 CPO1
15 HGATE
14 OUT
13 ON
12 TMR
11
D2ON
10
PWRGD
9
CPO2
20 19 18 17
SENSE
–
1
SENSE
+
2
IN1 3
INTV
CC
4
GND 5
IN2 6
GN PACKAGE
16-LEAD PLASTIC SSOP NARROW
T
JMAX
= 125°C,
θ
JA
= 110°C/W
UFD PACKAGE
20-LEAD (4mm
×
5mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 34°C/W
EXPOSED PAD (PIN 21) PCB GND CONNECTION OPTIONAL
2
422712fa
For more information
www.linear.com/LTC4227
LTC4227
orDer inForMaTion
LEAD FREE FINISH
LTC4227CUFD-1#PBF
LTC4227CUFD-2#PBF
LTC4227CUFD-3#PBF
LTC4227CUFD-4#PBF
LTC4227IUFD-1#PBF
LTC4227IUFD-2#PBF
LTC4227IUFD-3#PBF
LTC4227IUFD-4#PBF
LTC4227CGN-1#PBF
LTC4227CGN-2#PBF
LTC4227IGN-1#PBF
TAPE AND REEL
LTC4227CUFD-1#TRPBF
LTC4227CUFD-2#TRPBF
LTC4227CUFD-3#TRPBF
LTC4227CUFD-4#TRPBF
LTC4227IUFD-1#TRPBF
LTC4227IUFD-2#TRPBF
LTC4227IUFD-3#TRPBF
LTC4227IUFD-4#TRPBF
LTC4227CGN-1#TRPBF
LTC4227CGN-2#TRPBF
LTC4227IGN-1#TRPBF
PART MARKING*
42271
42272
42273
42274
42271
42272
42273
42274
42271
42272
42271
PACKAGE DESCRIPTION
20-Lead (4mm × 5mm) Plastic QFN
20-Lead (4mm × 5mm) Plastic QFN
20-Lead (4mm × 5mm) Plastic QFN
20-Lead (4mm × 5mm) Plastic QFN
20-Lead (4mm × 5mm) Plastic QFN
20-Lead (4mm × 5mm) Plastic QFN
20-Lead (4mm × 5mm) Plastic QFN
20-Lead (4mm × 5mm) Plastic QFN
16-Lead Plastic SSOP
16-Lead Plastic SSOP
16-Lead Plastic SSOP
TEMPERATURE RANGE
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
0°C to 70°C
0°C to 70°C
–40°C to 85°C
LTC4227IGN-2#PBF
LTC4227IGN-2#TRPBF
42272
16-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 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
SYMBOL
Supplies
V
IN
I
IN
V
INTVCC
V
INTVCC(UVL)
Input Supply Range
Input Supply Current
Internal Regulator Voltage
Internal V
CC
Undervoltage Lockout
PARAMETER
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.
CONDITIONS
l
l
l
MIN
2.9
TYP
MAX
18
UNITS
V
mA
V
V
mV
2
4.5
2.1
30
5
2.2
60
4
5.6
2.3
90
INTV
CC
Rising
l
l
∆V
INTVCC(HYST)
Internal V
CC
Undervoltage Lockout
Hysteresis
Ideal Diode Control
∆V
FWD(REG)
∆V
DGATE
I
CPO(UP)
I
DGATE(FPU)
I
DGATE(FPD)
I
DGATE2(DN)
t
ON(DGATE)
t
OFF(DGATE)
t
PLH(DGATE2)
Forward Regulation Voltage
(V
INn
– V
SENSE+
)
External N-Channel Gate Drive
(V
DGATEn
– V
INn
)
CPOn Pull-Up Current
DGATEn Fast Pull-Up Current
DGATEn Fast Pull-Down Current
DGATE2 Off Pull-Down Current
DGATEn Turn-On Delay
DGATEn Turn-Off Delay
D2ON
Low to DGATE2 High
IN < 7V, ∆V
FWD
= 0.1V, I = 0, –1µA
IN = 7V to 18V, ∆V
FWD
= 0.1V, I = 0,
–1µA
CPO = IN = 2.9V
CPO = IN = 18V
∆V
FWD
= 0.2V, ∆V
DGATE
= 0V, CPO = 17V
∆V
FWD
= – 0.2V, ∆V
DGATE
= 5V
D2ON
= 2V, ∆V
DGATE2
= 2.5V
∆V
FWD
= 0.2V , C
DGATE
= 10nF
∆V
FWD
= –0.2V , C
DGATE
= 10nF
l
l
l
l
l
10
5
10
–60
–50
25
7
12
–95
–85
–1.5
1.5
40
14
14
–120
–110
mV
V
V
µA
µA
A
A
l
l
l
l
40
100
0.25
0.2
40
200
0.5
0.5
100
µA
µs
µs
µs
422712fa
For more information
www.linear.com/LTC4227
3
LTC4227
elecTrical characTerisTics
SYMBOL
∆V
SENSE(CB)
∆V
SENSE(ACL)
∆V
HGATE
∆V
HGATE(PG)
I
HGATE(UP)
I
HGATE(DN)
I
HGATE(FPD)
t
PHL(SENSE)
t
OFF(HGATE)
t
D(HGATE)
t
P(HGATE)
Input/Output Pin
I
SENSE+
I
SENSE–
V
SENSE+(UVL)
SENSE
+
Input Current
SENSE
–
Input Current
SENSE
+
Undervoltage Lockout
SENSE
+
= 12V
SENSE
–
= 12V
SENSE
+
Rising
l
l
l
l
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.
PARAMETER
Circuit Breaker Trip Sense Voltage
(V
SENSE+
– V
SENSE–
)
Active Current Limit Sense Voltage
(V
SENSE+
– V
SENSE–
)
External N-Channel Gate Drive
(V
HGATE
– V
OUT
)
Gate-Source Voltage for Power Good
External N-Channel Gate Pull-Up Current Gate Drive On, HGATE = 0V
External N-Channel Gate Pull-Down
Current
External N-Channel Gate Fast Pull-Down
Current
Sense Voltage (SENSE
+
– SENSE
–
)
High to HGATE Low
EN
High to HGATE Low
ON Low to HGATE Low
SENSE
+
Low to HGATE Low
ON High,
EN
Low to HGATE Turn-On
Delay
ON to HGATE Propagation Delay
LTC4227-1, LTC4227-2
LTC4227-3, LTC4227-4
ON = Step 0.8V to 2V
Gate Drive Off
OUT = 12V , HGATE = OUT + 5V
Fast Turn-Off
OUT = 12V , HGATE = OUT + 5V
∆V
SENSE
= 300mV, C
HGATE
= 10nF
IN < 7V, I = 0, –1µA
IN = 7V to 18V, I = 0, –1µA
CONDITIONS
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
MIN
47.5
60
4.8
10
3.6
–7
150
100
TYP
50
65
7
12
4.2
–10
300
200
0.5
20
10
10
MAX
52.5
70
14
14
4.8
–13
500
300
1
40
20
20
150
2.4
20
2.2
100
2.05
90
1.26
140
0.65
1.26
1.22
140
±1
1.284
200
–13
1.272
0.25
–125
2.6
2.7
100
4
0.4
UNITS
mV
mV
V
V
V
µA
µA
mA
µs
µs
µs
µs
ms
ms
µs
mA
µA
V
mV
V
mV
V
V
V
mV
µA
V
mV
µA
V
V
µA
µA
%
µA
mA
V
422712fa
Hot Swap Control
50
0.8
100
1.6
10
1.2
10
1.75
10
1.21
40
0.55
1.21
1.07
40
1.185
40
–7
1.198
0.15
–75
1.4
1.4
50
1.9
50
1.235
80
0.6
1.235
1.145
90
0
1.235
110
–10
1.235
0.2
–100
2
2
50
1.9
0.15
∆V
SENSE+(HYST)
SENSE
+
Undervoltage Lockout
Hysteresis
V
ON(TH)
∆V
ON(HYST)
V
ON(RESET)
V
D2ON(H,TH)
V
D2ON(L,TH)
∆V
D2ON(HYST)
I
IN(LEAK)
V
EN(TH)
∆V
EN(HYST)
I
EN(UP)
V
TMR(TH)
I
TMR(UP)
I
TMR(DN)
I
TMR(RATIO)
I
OUT
V
OL
ON Pin Threshold Voltage
ON Pin Hysteresis
ON Pin Fault Reset Threshold Voltage
D2ON
Pin High Threshold
D2ON
Pin Low Threshold
D2ON
Pin Hysteresis
Input Leakage Current (ON,
D2ON)
EN
Pin Threshold Voltage
EN
Pin Hysteresis
EN
Pull-Up Current
TMR Pin Threshold Voltage
TMR Pull-Up Current
TMR Pull-Down Current
TMR Current Ratio I
TMR(DN)
/I
TMR(UP)
OUT Pin Current
Output Low Voltage (FAULT,
PWRGD)
OUT = 11V, IN = 12V, ON = 2V
OUT = 13V, IN = 12V, ON = 2V
I = 1mA
EN
= 1V
TMR Rising
TMR Falling
TMR = 1V, In Fault Mode
TMR = 2V, No Faults
ON =
D2ON
= 5V
EN
Rising
ON Falling
D2ON
Rising
D2ON
Falling
ON Rising
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
4
For more information
www.linear.com/LTC4227
LTC4227
elecTrical characTerisTics
SYMBOL
V
OH
I
OH
I
PU
t
RST(ON)
PARAMETER
Output High Voltage (FAULT,
PWRGD)
Input Leakage Current (FAULT,
PWRGD)
ON Low to
FAULT
High
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.
CONDITIONS
I = –1µA
V = 18V
l
l
l
MIN
TYP
0
MAX
±1
–13
40
UNITS
V
µA
µA
µs
l
INTV
CC
– 1 INTV
CC
– 0.5
Output Pull-Up Current (FAULT,
PWRGD)
V = 1.5V
–7
–10
20
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
All currents into device pins are positive; all currents out of
the device pins are negative. All voltages are referenced to GND unless
otherwise specified.
Note 3:
An internal clamp limits the DGATE and CPO pins to a minimum of
10V above and a diode below IN. Driving these pins to voltages beyond the
clamp may damage the device.
Note 4:
An internal clamp limits the HGATE pin to a minimum of 10V
above and a diode below OUT. Driving this pin to voltages beyond the
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Embedded System
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