LTC1985-1.8 데이터 시트보기 (PDF) - Linear Technology

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LTC1985-1.8

Micropower Precision Triple Supply Monitor with Push-Pull Reset Output in a 5-Lead SOT-23 Package

Linear Technology 

TYPICAL APPLICATIO S

LTC1985-1.8

Triple Supply Monitor (3V, 1.8V and Adjustable)

ADJUSTABLE SUPPLY

OR DC/DC FEEDBACK

DIVIDER

3V

1.8V

R1*

R2*

LTC1985-1.8

5

VCC3

4

VCC18

3

VCCA

2

GND

1

RST

SYSTEM RESET

1985-18 TA02

*TO PRESERVE THRESHOLD ACCURACY, SET PARALLEL

COMBINATION OF R1 AND R2 ≤ 66.5k

Dual Supply Monitor (3V and 1.8V, Defeat VCCA Input)

3V

1.8V

LTC1985-1.8

5

VCC3

4

VCC18

3

VCCA

2

GND

1

RST

SYSTEM RESET

1985-18 TA03

Dual Supply Monitor (3V Plus Adjustable)

ADJUSTABLE

SUPPLY

3V

R1*

R2*

LTC1985-1.8

5

VCC3

4

VCC18

3

VCCA

2

GND

1

RST

SYSTEM RESET

1985-18 TA04

*TO PRESERVE THRESHOLD ACCURACY, SET PARALLEL

COMBINATION OF R1 AND R2 ≤ 66.5k

Using VCCA Tied to DC/DC Feedback Divider

2.5V

LTC1435

6

VOSENSE

27.4k

1%

3V

2.26k

1%

1.8V

ADJUSTABLE

RESET TRIP

THRESHOLD 2.31V

22.6k

1%

LTC1985-1.8

5

VCC3

4

VCC18

3

VCCA

2

GND

1

RST

1985-18 TA05

SYSTEM RESET

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

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