LTC2917IDDB-B1#TRPBF datasheet, PDF

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LTC2917IDDB-B1#TRPBF: DescriptionProcessor Supervisor 1 Open Drain Automotive 10-Pin DFN EP T/R; File Size160KB，16 Pages; ManufacturerADI; Websitehttps://www.analog.com

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LTC2917IDDB-B1#TRPBF Overview

Processor Supervisor 1 Open Drain Automotive 10-Pin DFN EP T/R

LTC2917IDDB-B1#TRPBF Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Compliant
ECCN (US)	EAR99
Part Status	Active
Number of Supervisors	1
Maximum Reset Active Time (ms)	260
Output Driver	Open Drain
Monitored Voltage (V)	1.8
Minimum Operating Supply Voltage (V)	0.8
Maximum Operating Supply Voltage (V)	5.5
Maximum Supply Current (uA)	80
Power Fail Detection	No
Watchdog Timer	Yes
Manual Reset	No
Chip Enable Signals	No
Battery Backup Switching	No
Minimum Operating Temperature (°C)	-40
Maximum Operating Temperature (°C)	85
Supplier Temperature Grade	Industrial
Packaging	Tape and Reel
Type	Power Supply Monitor
Pin Count	10
Standard Package Name	DFN
Supplier Package	DFN EP
Mounting	Surface Mount
Package Height	0.75(Max)
Package Length	3
Package Width	2
PCB changed	10
Lead Shape	No Lead

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FEATURES

■

LTC2917/LTC2918

Voltage Supervisor with

27 Selectable Thresholds

and Watchdog Timer

DESCRIPTION

The LTC

2917-A/LTC2917-B and LTC2918-A/LTC2918-B

are low voltage single-supply monitors with selectable

thresholds and an adjustable watchdog timer. The parts

operate from 1.5V to 5.5V and consume a quiescent cur-

rent of only 30μA.

Two three state inputs select one of nine internally pro-

grammed thresholds without the need for external resistors.

For the LTC2917, an additional three state input determines

the tolerance (–5%, –10%, –15%). The tolerance for the

LTC2918 is ﬁxed at –5%. Threshold accuracy is guaranteed

at ±1.5% over the entire operating temperature range.

Glitch ﬁltering ensures reliable reset operation without

false triggering.

The reset timeout and the watchdog timeout may be set

with no external components, or adjusted using an exter-

nal capacitor. A windowed watchdog feature is available

for high-reliability applications (B1 versions). A separate

manual reset input on the LTC2918-A/LTC2918-B allows

a simple push button interface.

Operation to 125°C makes the LTC2917-A/LTC2917-B

and LTC2918-A/LTC2918-B suitable for automotive

applications.

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

■

9 Selectable Supply Voltages

12V, 5V, 3.3V, 2.5V, 1.8V

1.5V, 1.2V, 1V, +ADJ (0.5V)

3 Selectable Tolerances

–5%, –10%, –15% (LTC2917)

Manual Reset Input (LTC2918)

1.5V to 5.5V Supply Operation

Adjustable Watchdog Timeout

Windowed Watchdog Timeout for Higher Reliability

Applications (LTC2917-B, LTC2918-B)

6.2V Shunt Regulator for High Voltage Operation

Guaranteed Operation to 125°C

Guaranteed Threshold Accuracy: ±1.5%

Low Quiescent Current: 30μA Typical

Power Supply Glitch Immunity

Guaranteed

RST

for V

≥ 0.8V

10-Lead MSOP Packages and (3mm

2mm) DFN

Packages

APPLICATIONS

■

Handheld Devices

Cell Phone Base Stations

Automotive Control Systems

Network Servers

Optical Networking Systems

TYPICAL APPLICATION

1.8V Supply Monitor with Manual

Reset and Internal Timers Selected

1.8V

Monitor Selection Table

NOMINAL VOLTAGE

12V

SEL1

Open

GND

SEL2

Open

GND

Open

GND

Open

GND

29178fb

0.1μF

LTC2918-A

GND

RST

WDI

SEL1

SEL2

10k

3.3V

μP

RST

I/O

29178 TA01

2.5V

1.8V

1.5V

1.2V

ADJ (0.5V)

WDU

= 1.6s

RST

= 200ms

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