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TPS7B6833QPWPRQ1 Datasheet(PDF) 1 Page - Texas Instruments

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Part # TPS7B6833QPWPRQ1
Description  500-mA 40-V High-Voltage Ultralow Quiescent-Current Watchdog LDO
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS7B6833QPWPRQ1 Datasheet(HTML) 1 Page - Texas Instruments

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MCU
Supply
OUT
IN
TPS7B6850-Q1
PGADJ
EN
DELAY
WDO
WRS
ROSC
WD
PG
WD_EN
WTS
FSEL
Battery
MCU I/O
GND
MCU I/O
MCU
I/O
MCU
Reset
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCT PREVIEW Information. Product in design phase of
development. Subject to change or discontinuance without notice.
TPS7B6833-Q1, TPS7B6850-Q1
SLVSD43 – MAY 2015
TPS7B68xx-Q1 500-mA 40-V High-Voltage Ultralow Quiescent-Current Watchdog LDO
1
1 Features
1
Qualified for Automotive Applications
AEC-Q100 Qualified With the Following Results
Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
Device HBM ESD Classification Level H2
Device CDM ESD Classification Level C3B
Maximum Output Current: 500 mA
4-V to 40-V Wide VIN Input-Voltage Range With
Up to 45-V Transients
Fixed 3.3-V and 5-V Outputs
Maximum Dropout Voltage: 600 mV at 500 mA
Stable With Output Capacitor in Wide-Range of
Capacitance (4.7 µF to 500 µF) and ESR (0.001
Ω
to 20
Ω)
Low Quiescent Current (I(Q))
< 4 µA When EN Is Low (Shutdown Mode)
24 µA Typical at Light Loads With WD_EN
High (Watchdog Disabled)
Configurable for Window or Standard Watchdog
Open-and-Close Window Ratio 1:1 or 8:1
Configurable
Fully Adjustable Watchdog Period (From 10 ms to
500 ms)
9% Accurate Watchdog Period Across
Temperature
Dedicated WD_EN Pin to Control Watchdog ON-
OFF
Fully Adjustable Power-On Reset Threshold and
Period
Low Input-Voltage Tracking to UVLO
Integrated Fault Protection
Overload Current-Limit Protection
Thermal Shutdown
28-Pin HTSSOP Package
2 Applications
Automotive MCU Power Supply
Body Control Modules
Body Comfort Modules
EV and HEV Battery Monitor Systems
Electronic Gear Shifter
Transmission
3 Description
In
automotive
microcontroller
or
microprocessor
power-supply applications, the watchdog is used to
monitor the microcontroller working status to prevent
software runaway. It is necessary for the watchdog to
be independent of the microcontroller in a reliable
system.
The TPS7B68xx-Q1 is a family of 500-mA watchdog
LDOs designed for an operating voltage up to 40 V,
with typical quiescent current of only 24 µA at light
load. The devices integrate a programmable function
for selecting a window or standard watchdog, with an
external resistor to set the watchdog time within 9%
accuracy.
The PG pin on the TPS7B68xx-Q1 devices indicate
when the output voltage is stable and in regulation.
The
power-good
delay
period
and
power-good
threshold can be adjusted by external components.
The devices also feature an integrated short-circuit
and overcurrent protection. The combination of such
features makes these devices particularly flexible and
suitable
to
supply
microcontroller
systems
in
automotive applications.
Device Information(1)
PART NUMBER
OUTPUT VOLTAGE
(VO)
PACKAGE
TPS7B6833-Q1
Fixed 3.3 V
HTSSOP (28)
TPS7B6850-Q1
Fixed 5 V
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Schematic


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