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LT1641

1641fd

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

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

● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. Vcc = 24V

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VCC

VCC Operating Range

●

980

ICC

VCC Supply Current

ON = 3V

●

5.5

VLKO

VCC Undervoltage Lockout

●

7.5

8.3

8.8

VFBH

FB Pin High Voltage Threshold

FB Low to High Transition

●

1.280

1.313

1.345

VFBL

FB Pin Low Voltage Threshold

FB High to Low Transition

●

1.221

1.233

1.245

VFBHST

FB Pin Hysteresis Voltage

IINFB

FB Pin Input Current

VFB = GND

– 1

µA

∆VFB

FB Pin Threshold Line Regulation

≤ VCC ≤ 80V

●

0.05

mV/V

VSENSETRIP

SENSE Pin Trip Voltage (VCC – VSENSE)VFB = 0V

●

812

VFB = 1V

●

IGATEUP

GATE Pin Pull-Up Current

Charge Pump On, VGATE = 7V

●

–5

– 10

– 20

µA

IGATEDN

GATE Pin Pull-Down Current

Any Fault Condition, VGATE = 2V

●

100

∆VGATE

External N-Channel Gate Drive

VGATE – VCC, VCC = 10.8V to 20V

●

4.5

VCC = 20V to 80V

●

ITIMERUP

TIMER Pin Pull-Up Current

VTIMER = 0V

●

– 24

– 80

– 132

µA

ITIMERON

TIMER Pin Pull-Down Current

VTIMER = 1V

●

1.5

µA

VONH

ON Pin High Threshold

ON Low to High Transition

●

1.280

1.313

1.345

VONL

ON Pin Low Threshold

ON High to Low Transition

●

1.221

1.233

1.245

VONHYST

ON Pin Hysteresis

IINON

ON Pin Input Current

VON = GND

– 1

µA

VOL

PWRGD Output Low Voltage

IO = 2mA

●

0.4

IO = 4mA

●

2.5

IOH

PWRGD Pin Leakage Current

VPWRGD = 80V

●

µA

DC ELECTRICAL CHARACTERISTICS

TJMAX = 125°C, θJA = 110°C/W

1641

1641I

LT1641CS8

LT1641IS8

TOP VIEW

VCC

SENSE

GATE

TIMER

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/

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