LTC2917IDDB-A1#PBF datasheet, PDF

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LTC2917IDDB-A1#PBF: DescriptionSupervisory circuit LTC2917 - Voltage Supervisor with 27 Selectable Thresholds and Watchdog Timer; CategoryPower/power management The power supply circuit; File Size156KB，16 Pages; ManufacturerADI; Websitehttps://www.analog.com; Environmental Compliance

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LTC2917IDDB-A1#PBF Overview

Supervisory circuit LTC2917 - Voltage Supervisor with 27 Selectable Thresholds and Watchdog Timer

LTC2917IDDB-A1#PBF Parametric

Parameter Name	Attribute value
Brand Name	Analog Devices Inc
Is it lead-free?	Contains lead
Is it Rohs certified?	conform to
Maker	ADI
package instruction	HVSON,
Contacts	10
Manufacturer packaging code	05-08-1722
Reach Compliance Code	compliant
Adjustable threshold	YES
Analog Integrated Circuits - Other Types	POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 code	R-PDSO-N10
JESD-609 code	e3
length	3 mm
Humidity sensitivity level	1
Number of channels	1
Number of functions	1
Number of terminals	10
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	HVSON
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	250
Certification status	Not Qualified
Maximum seat height	0.8 mm
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	1.5 V
Nominal supply voltage (Vsup)	2.5 V
surface mount	YES
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	2 mm

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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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