Battery-Backup Supervisor. TPS3617 Datasheet

TPS3617 Datasheet PDF, Equivalent


Part Number

TPS3617

Description

Battery-Backup Supervisor

Manufacture

etcTI

Total Page 18 Pages
PDF Download
Download TPS3617 Datasheet PDF


TPS3617 Datasheet
TPS3617
TPS3618
www.ti.com
SLVS339D – DECEMBER 2000 – REVISED DECEMBER 2006
BATTERY-BACKUP SUPERVISOR FOR RAM RETENTION
FEATURES
Supply Current of 40 µA (Max)
Battery Supply Current of 100 nA (Max)
Precision 5-V Supply Voltage Monitor, Other
Voltage Options on Request
Backup-Battery Voltage Can Exceed VDD
Watchdog Timer With 800-ms Time-Out
Power-On Reset Generator With Fixed 100-ms
Reset Delay Time
Voltage Monitor for Power-Fail or Low-Battery
Monitoring
Battery Freshness Seal (TPS3617 Only)
8-Pin MSOP Package
Temperature Range: –40° to +85°C
APPLICATIONS
Fax Machines
Set-Top Boxes
Advanced Voice Mail Systems
Portable Battery Powered Equipment
Computer Equipment
Advanced Modems
Automotive Systems
Portable Long-Time Monitoring Equipment
Point-of-Sale Equipment
MSOP (DGK) Package
(TOP VIEW)
VOUT
VDD
GND
PFI
VBAT
RESET
WDI
PFO
Power
Supply
0.1 µF
External
Source
ACTUAL SIZE
3,05 mm x 4,98 mm
DESCRIPTION
The TPS3617 and TPS3618 are battery-backup
supervisors that monitor 5 V supplies. They provide
a battery-backup function ideal for applications that
require data retention of CMOS RAM during fault
conditions. When the voltage at VDD drops below a
preset threshold (VIT), the active low push-pull
RESET output asserts, and VOUT switches from VDD
to VBAT. When VDD rises above the trip threshold,
VOUT switches immediately from VBAT to VDD.
The RESET output remains low until the delay time
(td) expires. During power on, RESET is asserted
when the supply voltage (VDD or VBAT) goes higher
than 1.1 V.
The PFI and PFO pins are provided if additional
voltage monitoring is needed. If the voltage at PFI is
less than 1.15 V, the push-pull PFO pin will assert
low. When the voltage at PFI exceeds the threshold
voltage, PFO will go high.
These devices also feature a watchdog timer pin
(WDI) that monitors processor activity and asserts
RESET if the the processor is inactive longer than
the watchdog timeout period. If the watchdog timer is
not used, the WDI pin should be left floating.
The TPS3617 and TPS3618 are available in an 8-pin
MSOP package and are characterized for operation
over a temperature range of –40°C to +85°C.
TPS3617
TPS3618
VDD
VBAT
Backup
Battery
Microcontroller
or
Microprocessor
Rx
PFI
RESET
WDI
PFO
Ry
VOUT
GND
Switchover
Capacitor
0.1 µF
RESET
I/O
I/O
VCC
GND
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2000–2006, Texas Instruments Incorporated

TPS3617 Datasheet
TPS3617
TPS3618
SLVS339D – DECEMBER 2000 – REVISED DECEMBER 2006
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric changes could cause the device not to meet its published
specifications.
PACKAGE INFORMATION(1)
PRODUCT
TPS3617-50
TPS3618-50
NOMINAL
SUPPLY
VOLTAGE
THRESHOLD
VOLTAGE (VIT)(2)
SPECIFIED
TEMPERATURE
RANGE
5V
4.55V
–40°C to +125°C
PACKAGE
MARKING
ASD
ANK
ORDERING
NUMBER
TPS3617-50DGK
TPS3617-50DGKR
TPS3618-50DGKT
TPS3618-50DGKR
TRANSPORT MEDIA,
QUANTITY
Tube, 80
Tape and Reel, 2500
Tape and Reel, 250
Tape and Reel, 2500
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this data sheet, or refer to our
web site at www.ti.com.
(2) For other threshold votages, contact the local TI sales office for availability and lead time.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature (unless otherwise noted)(1)
Input voltage range, VDD
Input voltage range, PFI pin
WDI pin
Continuous output current at VOUT, IO
All other pins, IO
Operating junction temperature range, TJ(2)
Storage temperature range, TSTG
Lead temperature soldering 1,6 mm (1/16 inch) from case for 10 seconds
Continuous total power dissipation
TPS3617, TPS3618
–0.3 to 7
–0.3 to (VDD + 0.3)
–0.3 to (VDD + 0.3)
400
±10
–40 to +85
–65 to +150
+260
See Dissipation Rating Table
UNIT
V
V
V
mA
mA
°C
°C
°C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating
Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) Due to the low dissipated power in this device, it is assumed that TJ = TA.
DISSIPATION RATING TABLE
PACKAGE
DGK
TA +25°C
POWER RATING
470 mW
DERATING FACTOR
ABOVE TA = +25°C
3.76 mW/°C
TA = +70°C
POWER RATING
301 mW
TA = +85°C
POWER RATING
241 mW
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Features Datasheet pdf TPS3617 TPS3618 www.ti.com SLVS339D DECEMBER 2000 – REVISED DECEMBER 20 06 BATTERY-BACKUP SUPERVISOR FOR RAM RE TENTION FEATURES • Supply Current of 40 µA (Max) • Battery Supply Curren t of 100 nA (Max) • Precision 5-V Sup ply Voltage Monitor, Other Voltage Opti ons on Request • Backup-Battery Volta ge Can Exceed VDD • Watchdog Timer Wi th 800-ms Time-Out • Power-On Reset G enerator With Fixed 100-ms Reset Delay Time • Voltage Monitor for Power-Fail or Low-Battery Monitoring • Battery Freshness Seal (TPS3617 Only) • 8-Pin MSOP Package • Temperature Range: 40° to +85°C APPLICATIONS • Fax M achines • Set-Top Boxes • Advanced Voice Mail Systems • Portable Battery Powered Equipment • Computer Equipme nt • Advanced Modems • Automotive S ystems • Portable Long-Time Monitorin g Equipment • Point-of-Sale Equipment MSOP (DGK) Package (TOP VIEW) VOUT V DD GND PFI VBAT RESET WDI PFO Power S upply 0.1 µF External Source ACTUAL SIZE 3,05 mm x 4,98 mm DESCRIPTION The TPS3617 and TPS3618 are battery-b.
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