LTC1921 datasheet(19/24 Pages) LINER

tên linh kiện	LTC1921

Giải thích chi tiết về linh kiện	Negative Voltage Hot Swap Controllers in SOT-23

PDF	24 Pages

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nhà sản xuất	LINER [Linear Technology]

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19 / 24 page

4251b12f

LTC4251B/LTC4251B-1/

LTC4251B-2

APPLICATIONS INFORMATION

Figure 10. Undervoltage Timing with an Overvoltage Glitch (All Waveforms are Referenced to VEE)

Figure 11. Overvoltage Timing (All Waveforms are Referenced to VEE)

24 5

6 7

8 9

VUV/0V DROPS BELOW VOVLO AND TIMER RESTARTS INITIAL TIMING CYCLE.

VUV/0V CLEARS VUVHI. CHECK TIMER < VTMRL, GATE < VGATEL AND SENSE < VCB.

VUV/0V OVERSHOOTS VOVHI AND TIMER ABORTS INITIAL TIMING CYCLE.

TIMER CLEARS VTMRL, CHECK GATE < VGATEL AND SENSE < VCB.

VOVHI

VUVHI

VOVLO

VTMRH

VTMRL

VACL

VCB

5.8μA

230μA

58μA

5.8μA

INITIAL TIMING CYCLE

START-UP CYCLE

4251b12 F10

UV/0V

TIMER

GATE

SENSE

5 6

UV/0V

TIMER

GATE

SENSE

VOVHI

VTMRH

VOVLO

VACL

VCB

5.8μA

4251b12 F11

230μA

58μA

VUV/0V DROPS BELOW VOVLO AND GATE RESTARTS.

VUV/0V OVERSHOOTS VOVHI AND GATE PULLS TO VEE. TIMER UNAFFECTED.

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