LTC2909 データシートの表示（PDF） - Linear Technology

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LTC2909

Precision Triple/Dual Input UV, OV and Negative Voltage Monitor

Linear Technology 

BLOCK DIAGRA

ADJ1

SEL

THREE-STATE

DECODE

CONTROL 2

+

CONTROL 1

–

ADJ2

+

–

VCC

+

–

+– 500mV

REF

+– 1.000V

LTC2909

VCC

VCC

6.5V

ADJUSTABLE

PULSE

GENERATOR

200ms

PULSE

GENERATOR

TMR

THREE-STATE

DECODE

RST

GND

SEL

GND

OPEN

VCC

CONTROL 1

H

L

L

CONTROL 2

H

H

L

WU

W

TI I G DIAGRA S

Normal Positive Polarity Input Timing

VADJ

VRT

tPROP

tRST

RST

1V

Normal Negative Polarity Input Timing

VADJ

VRT

tPROP

tRST

RST

1V

Normal UVLO Timing

VCC VCC(UVLO)

tUV

tRST

RST

1V

2909 BD

Comparator Mode Positive Polarity Input Timing

VADJ

VRT

tPROP

RST

1V

,VRT

tPROP

Comparator Mode Negative Polarity Input Timing

VADJ

VRT

tPROP

RST

1V

,VRT

tPROP

Comparator Mode UVLO Timing

VCC VCC(UVLO)

tUV

RST

1V

,VCC(UVLO)

tUV

2909 TD

2909fb

7

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