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Surge Stopper. LTC4381 Datasheet

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Surge Stopper. LTC4381 Datasheet






LTC4381 Stopper. Datasheet pdf. Equivalent




LTC4381 Stopper. Datasheet pdf. Equivalent





Part

LTC4381

Description

Low Quiescent Current Surge Stopper



Feature


LTC4381 Low Quiescent Current Surge Stop per with 9mΩ MOSFET FEATURES n Withst ands Surge Voltages Up to 100V n Intern al 9mΩ N-Channel MOSFET n Guaranteed S afe Operating Area: 20ms at 70V, 1A n L ow Quiescent Current: 6µA Operating n Operates Through Automobile Cold Crank n Wide Operating Voltage Range: 4V to 7 2V n Overcurrent Protection n Selectabl e Internal 28.5V/47V .
Manufacture

Analog Devices

Datasheet
Download LTC4381 Datasheet


Analog Devices LTC4381

LTC4381; or Adjustable Output Clamp Voltage (Tabl e 1) n Reverse Input Protection to –6 0V n Adjustable Turn-On Threshold n Adj ustable Fault Timer with MOSFET Stress Acceleration n Latchoff and Retry Optio ns (Table 1) n Low Retry Duty Cycle Dur ing Faults (Table 1) n 32-Lead DFN (7mm × 5mm) Package APPLICATIONS n Automot ive 12V, 24V and 48V System n Avionic/I ndustrial Surge Prote.


Analog Devices LTC4381

ction n Hot Swap/Live Insertion n High S ide Switch for Battery Powered Systems n Automotive Load Dump Protection DESC RIPTION The LTC®4381 is an integrated solution for low quiescent current surg e stopper applications that protect loa ds from high voltage transients. Overvo ltage protection is provided by clampin g the gate voltage of an internal 9mΩ N-channel MOSFET to .


Analog Devices LTC4381

limit the output voltage to a safe value during overvoltage events such as load dump in automobiles. The MOSFET safe o perating area is production tested and guaranteed for the stresses during high voltage transients. Fixed output clamp voltages are selectable for 12V and 24 V/28V systems. For systems of any volta ge up to 80V, use the adjustable clamp versions. Overcurr.

Part

LTC4381

Description

Low Quiescent Current Surge Stopper



Feature


LTC4381 Low Quiescent Current Surge Stop per with 9mΩ MOSFET FEATURES n Withst ands Surge Voltages Up to 100V n Intern al 9mΩ N-Channel MOSFET n Guaranteed S afe Operating Area: 20ms at 70V, 1A n L ow Quiescent Current: 6µA Operating n Operates Through Automobile Cold Crank n Wide Operating Voltage Range: 4V to 7 2V n Overcurrent Protection n Selectabl e Internal 28.5V/47V .
Manufacture

Analog Devices

Datasheet
Download LTC4381 Datasheet




 LTC4381
LTC4381
Low Quiescent Current Surge
Stopper with 9mΩ MOSFET
FEATURES
n Withstands Surge Voltages Up to 100V
n Internal 9mΩ N-Channel MOSFET
n Guaranteed Safe Operating Area: 20ms at 70V, 1A
n Low Quiescent Current: 6µA Operating
n Operates Through Automobile Cold Crank
n Wide Operating Voltage Range: 4V to 72V
n Overcurrent Protection
n Selectable Internal 28.5V/47V or Adjustable Output
Clamp Voltage (Table 1)
n Reverse Input Protection to –60V
n Adjustable Turn-On Threshold
n Adjustable Fault Timer with MOSFET Stress
Acceleration
n Latchoff and Retry Options (Table 1)
n Low Retry Duty Cycle During Faults (Table 1)
n 32-Lead DFN (7mm × 5mm) Package
APPLICATIONS
n Automotive 12V, 24V and 48V System
n Avionic/Industrial Surge Protection
n Hot Swap/Live Insertion
n High Side Switch for Battery Powered Systems
n Automotive Load Dump Protection
DESCRIPTION
The LTC®4381 is an integrated solution for low quiescent
current surge stopper applications that protect loads from
high voltage transients. Overvoltage protection is pro-
vided by clamping the gate voltage of an internal 9mΩ
N-channel MOSFET to limit the output voltage to a safe
value during overvoltage events such as load dump in
automobiles. The MOSFET safe operating area is pro-
duction tested and guaranteed for the stresses during
high voltage transients. Fixed output clamp voltages are
selectable for 12V and 24V/28V systems. For systems of
any voltage up to 80V, use the adjustable clamp versions.
Overcurrent protection is also provided. An internal mul-
tiplier generates a TMR pin current proportional to VDS
and ID, so that operating time in both overcurrent and
overvoltage conditions is limited in accordance with
MOSFET stress.
The GATE pin can drive back-to-back MOSFETs for
reverse input protection, eliminating the voltage drop
and dissipation of a Schottky diode solution. A low 6µA
operating current permits use in always-on and battery
powered applications.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
12V System with 100V/0.5A/400ms Load Dump Overvoltage Protection
VIN
12V
(100VPK) 20k
0.1µF
200k
68V
CMHZ5266B
80mΩ
IN
SRC
DRN
SNS
VCC
OUT
ON
LTC4381-2
10Ω
GFET
SEL
GATE
12V/0.5A
OUTPUT
CLAMPED
AT 28.5V
22µF
FLT
33Ω
TMR
10µF
GND
4381 TA01a
47nF
12V, 0.5A with 100V Overvoltage Protection
100V INPUT SURGE
ILOAD = 0.5A
VIN
20V/DIV
12V
VOUT 12V
20V/DIV
100ms/DIV
4381 TA01b
Rev. 0
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1




 LTC4381
LTC4381
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
IN (Note 5)................................................ –0.3V to 100V
VCC, ON, SEL................................................ –60V to 80V
DRN (Note 3), SNS, OUT, SRC
LTC4381-1/LTC4381-2............................ –0.3V to 53V
LTC4381-3/LTC4381-4............................ –0.3V to 80V
SNS to OUT...................................................... –5V to 5V
GATE, GFET (Note 4)
LTC4381-1/LTC4381-2............................ –0.3V to 53V
LTC4381-3/LTC4381-4............................ –0.3V to 86V
GATE to OUT, GATE to VCC,
GFET to SRC (Note 4)............................. –0.3V to 10V
TMR.............................................................. –0.3V to 5V
FLT.............................................................. –0.3V to 80V
IDRN........................................................................2.5mA
Operating Junction Temperature Range
LTC4381C................................................. 0°C to 70°C
LTC4381I..............................................–40°C to 85°C
LTC4381H........................................... –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
TMR 1
ON 2
GND 3
DRN 4
NC 5
VCC 6
IN 7
SRC 8
SRC 9
SRC 10
SRC 11
SRC 12
SRC 13
SRC 14
SRC 15
SRC 16
32 SEL
31 FLT
30 OUT
29 SNS
28 NC
27 GATE
26 GFET
33
25 IN
IN
24 SRC
23 SRC
22 SRC
21 SRC
20 SRC
19 SRC
18 SRC
17 SRC
DKE PACKAGE
32-LEAD (7mm × 5mm) PLASTIC DFN
TJMAX = 150°C, θJA = 23°C/W
EXPOSED PAD (PIN 33) IS IN
ORDER INFORMATION
TUBE
TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC4381CDKE-2#PBF
LTC4381CDKE-2#TRPBF
43812
32-Lead (7mm × 5mm) Plastic DFN 0°C to 70°C
LTC4381IDKE-2#PBF
LTC4381IDKE-2#TRPBF
43812
32-Lead (7mm × 5mm) Plastic DFN –40°C to 85°C
LTC4381HDKE-2#PBF
LTC4381HDKE-2#TRPBF
43812
32-Lead (7mm × 5mm) Plastic DFN –40°C to 125°C
LTC4381CDKE-4#PBF
LTC4381CDKE-4#TRPBF
43814
32-Lead (7mm × 5mm) Plastic DFN 0°C to 70°C
LTC4381IDKE-4#PBF
LTC4381IDKE-4#TRPBF
43814
32-Lead (7mm × 5mm) Plastic DFN –40°C to 85°C
LTC4381HDKE-4#PBF
LTC4381HDKE-4#TRPBF
43814
32-Lead (7mm × 5mm) Plastic DFN –40°C to 125°C
Contact ADI Sales for LTC4381-1/LTC4381-3 option. Contact ADI Sales for parts specified with wider operating temperature ranges. *The temperature
grade is identified by a label on the shipping container.
Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
Rev. 0
2
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 LTC4381
LTC4381
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = OUT = SNS = DRN = 12V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
DC Characteristics
VIN
Input Voltage Range
(Note 7)
l4
80
VCC
Operating Voltage Range
LTC4381-1/LTC4381-2 (Note 7)
LTC4381-3/LTC4381-4 (Note 7, 8)
l4
80
l4
72
VOUT
Operating Voltage Range
VCC = OUT = SNS = DRN = 12V
l
72
IQ
Total Supply Current, ON
C-Grade and I-Grade
(Note 6)
H-Grade
l
6 12
l
20
VCC = OUT = SNS = DRN = 4V
l
18 35
ICC
VCC Current, Shutdown
VCC Current, ON
IIN
IN pin Leakage Current
ON = OUT = SNS = 0V
VCC = OUT = SNS = DRN = 12V
VCC = OUT = SNS = DRN = 4V
VIN = 24V, VGFET = VSRC = 0V, ON = 0V
l
5 10
l
4 12
l
16 30
l
10
IR
Reverse Input Current
VCC = –60V, ON Open, SEL = 0V
VCC = ON = SEL = –60V
l
0 –2
l
–1 –5
RON
MOSFET On-Resistance
IN = VCC = 8V, 12V, ISRC = –1A, IGATE = –1µA
9 13
l
28
SOA
MOSFET Safe Operating Area
VIN – VSRC = 70V, 1A, 10W√s
20
SNS, OUT, SEL, ON, DRN
ISNS
IOUT, ON
IOUT, SD
SNS Current, ON
OUT Current, ON
OUT Current, Shutdown
C-Grade and I-Grade
H-Grade
l
0.5 1.4
l
1.5 5.5
l
6 12
l
80
∆VSNS
ISEL
VSEL
ION
Current Limit Sense Voltage
(SNS – OUT)
SEL Input Current
SEL Input Threshold
ON Input Current
VCC = 12V, 24V, OUT = 6V, 12V
VCC = 12V, 24V, OUT = 0V
SEL = 0V to 80V
VON = 1V
l 45
l 40
l
l 0.4
l –1
50 55
62 95
±0.1
3
–2 –4
VON
ON Input Threshold
ON Rising
l 0.99 1.05 1.1
VON(HYST)
∆VDRN
VDS(MAX)
ON Input Hysteresis
DRN Voltage (DRN – OUT)
Overvoltage VDS Threshold
(DRN – OUT)
IDRN = 0.1mA
TMR = 0.8V, IDRN = 2µA
45
l 0.7 2.25 2.6
0.58 0.7 0.8
l 0.3
1.0
SRC, GATE, FLT, TMR
VSRC
SRC Voltage Output Clamp
VIN = VCC = 80V, SEL = 0V, IOUT = –10mA, LTC4381-1/LTC4381-2 l 25.5 28.5 31.5
VIN = VCC = 80V, SEL = VCC, IOUT = –10mA, LTC4381-1/LTC4381-2 l 43.5 47.0 50.5
VIN = 80V, VCC = 12V, IOUT = –10mA, LTC4381-3/LTC4381-4 l 19.0 22.5 26.0
VIN = 80V, VCC = 24V, IOUT = –10mA, LTC4381-3/LTC4381-4 l 31.0 34.5 38.0
VGFET(TH)
MOSFET Threshold
ISRC = –10mA
l1
3 4.6
∆VGATE
∆VCLAMP
GATE Drive (GATE – OUT)
SEL = SNS = OUT = VCC, 8V ≤ VCC ≤ 30V
GATE Clamp to VCC (GATE – VCC) SNS = OUT = 20V, IGATE = 0µA
l 10
l 12
11.1 14
13.5 15.5
UNITS
V
V
V
V
µA
µA
µA
µA
µA
µA
µA
mA
mA
ms
µA
µA
µA
µA
mV
mV
µA
V
µA
V
mV
V
V
V
V
V
V
V
V
V
Rev. 0
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3



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