LT1641-1/LT1641-2
W W U W
U
W
U
ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
TOP VIEW
Supply Voltage (VCC) ...............................–0.3V to 100V
Input Voltage (SENSE).............................–0.3V to 100V
Input Voltage (TIMER) ...............................–0.3V to 44V
Input Voltage (FB, ON)...............................–0.3V to 60V
Output Voltage (PWRGD) ........................–0.3V to 100V
Output Voltage (GATE) ............................–0.3V to 100V
Operating Temperature Range
LT1641-1C, LT1641-2C ........................... 0°C to 70°C
LT1641-1I, LT1641-2I ........................ –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ON
FB
1
2
3
4
8
7
6
5
V
CC
SENSE
GATE
PWRGD
GND
TIMER
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 110°C/W
S8 PART MARKING
ORDER PART NUMBER
LT1641-1CS8
LT1641-1IS8
16411
16411I
16412
16412I
LT1641-2CS8
LT1641-2IS8
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
DC ELECTRICAL CHARACTERISTICS
The
cc
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T = 25°C. V = 24V
A
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
80
UNITS
V
V
V
V
V
Operating Range
Supply Current
●
●
●
●
●
9
CC
CC
CC
CC
I
ON = 3V
2
5.5
mA
V
CC
V
V
V
V
Undervoltage Lockout
7.5
8.3
8.8
LKO
FBH
FB Pin High Voltage Threshold
FB Pin Low Voltage Threshold
FB Pin Hysteresis Voltage
FB Pin Input Current
FB Low to High Transition
FB High to Low Transition
1.280
1.221
1.313
1.233
80
1.345
1.245
V
V
FBL
mV
µA
FBHST
INFB
I
V
= GND
–1
FB
∆V
FB
FB Pin Threshold Line Regulation
9V ≤ V ≤ 80V
●
0.05
mV/V
CC
V
SENSE Pin Trip Voltage (V – V
)
V
V
= 0V
= 1V
●
●
8
39
12
47
17
55
mV
mV
SENSETRIP
CC
SENSE
FB
FB
I
I
GATE Pin Pull-Up Current
GATE Pin Pull-Down Current
External N-Channel Gate Drive
Charge Pump On, V
= 7V
●
●
–5
35
–10
70
–20
100
µA
GATEUP
GATEDN
GATE
Any Fault Condition, V
= 2V
mA
GATE
∆V
V
V
– V , V = 10.8V to 20V
= 20V to 80V
●
●
4.5
10
18
18
V
V
GATE
GATE
CC CC
CC
I
I
TIMER Pin Pull-Up Current
TIMER Pin Pull-Down Current
ON Pin High Threshold
ON Pin Low Threshold
ON Pin Hysteresis
V
V
= 0V
= 1V
●
●
●
●
–24
1.5
–80
3
–132
5
µA
µA
V
TIMERUP
TIMERON
TIMER
TIMER
V
V
V
ON Low to High Transition
ON High to Low Transition
1.280
1.221
1.313
1.233
80
1.345
1.245
ONH
ONL
V
mV
µA
ONHYST
INON
I
ON Pin Input Current
V
= GND
–1
ON
V
PWRGD Output Low Voltage
I
= 2mA
O
O
●
●
0.4
2.5
V
V
OL
I = 4mA
I
PWRGD Pin Leakage Current
V
= 80V
PWRGD
●
10
µA
OH
164112fc
2
Linear [ Linear ]
