2

LT1641

1641fd

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

LT1641CS8 ............................................. 0

°C to 70°C

LT1641IS8 .......................................... – 40

°C to 85°C

Storage Temperature Range ................. – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300

°C

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

(Note 1)

The

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

●

980

V

ON = 3V

●

2

5.5

mA

●

7.5

8.3

8.8

V

FB Pin High Voltage Threshold

FB Low to High Transition

●

1.280

1.313

1.345

V

FB Pin Low Voltage Threshold

FB High to Low Transition

●

1.221

1.233

1.245

V

FB Pin Hysteresis Voltage

80

mV

FB Pin Input Current

– 1

µA

FB Pin Threshold Line Regulation

9V

●

0.05

mV/V

●

812

17

mV

●

39

47

55

mV

GATE Pin Pull-Up Current

●

–5

– 10

– 20

µA

GATE Pin Pull-Down Current

●

35

70

100

mA

External N-Channel Gate Drive

●

4.5

18

V

●

10

18

V

TIMER Pin Pull-Up Current

●

– 24

– 80

– 132

µA

TIMER Pin Pull-Down Current

●

1.5

3

5

µA

ON Pin High Threshold

ON Low to High Transition

●

1.280

1.313

1.345

V

ON Pin Low Threshold

ON High to Low Transition

●

1.221

1.233

1.245

V

ON Pin Hysteresis

80

mV

ON Pin Input Current

– 1

µA

PWRGD Output Low Voltage

●

0.4

V

●

2.5

V

PWRGD Pin Leakage Current

●

10

µA

DC ELECTRICAL CHARACTERISTICS

1641

1641I

LT1641CS8

LT1641IS8

1

2

3

4

8

7

6

5

TOP VIEW

SENSE

GATE

TIMER

ON

FB

PWRGD

GND

S8 PACKAGE

8-LEAD PLASTIC SO

NOT RECOMMENDED FOR NEW DESIGNS

SEE LT1641-1/LT1641-2

ORDER PART NUMBER

S8 PART MARKING

Consult LTC Marketing for parts specified with wider operating temperature ranges.

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/