Watchdog LDO. TPS7B6350-Q1 Datasheet

TPS7B6350-Q1 LDO. Datasheet pdf. Equivalent

Part TPS7B6350-Q1
Description Ultralow-Quiescent-Current Watchdog LDO
Feature Product Folder Order Now Technical Documents Tools & Software Support & Community TPS7B6333-Q1,.
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Total Page 30 Pages
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TPS7B6333-Q1, TPS7B6350-Q1
SLVSDU9A – FEBRUARY 2017 – REVISED MARCH 2017
TPS7B63xx-Q1 300-mA 40-V High-Voltage, Ultralow-Quiescent-Current Watchdog LDO
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 2
– Device CDM ESD Classification Level C4B
• Maximum Output Current: 300 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: 400 mV at 300 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)
– 19 µA Typical at Light Loads With WD_EN
High (Watchdog Disabled)
• Configurable for Window Watchdog or Standard
Watchdog
• Open-to-Closed Window Ratio Configurable as
1:1 or 8:1
• Fully Adjustable Watchdog Period (From 10 ms to
500 ms)
• 9% Accurate Watchdog Period
• Dedicated WD_EN Pin to Control Watchdog ON-
OFF
• Fully Adjustable Power-Good Threshold and
Power-Good Delay Period
• Low Input-Voltage Tracking to UVLO
• Integrated Fault Protection
– Overload Current-Limit Protection
– Thermal Shutdown
• 16-Pin HTSSOP Package
2 Applications
• Automotive MCU Power Supply
• Body Control Modules (BCM)
• Body Comfort Modules
• EV and HEV Battery Management Systems
(BMS)
• Electronic Gear Shifter
• Transmission Control Unit (TCU)
• Electrical Power Steering (EPS)
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 TPS7B63xx-Q1 device is a family of 300-mA
watchdog LDOs designed for an operating voltage up
to 40 V, with typical quiescent current of only 19 µA
at light load. The devices integrate a programmable
function for selecting a window watchdog or standard
watchdog, with an external resistor to set the
watchdog time within 9% accuracy.
The PG pin on the TPS7B63xx-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 selecting external
components. The devices also feature integrated
short-circuit and overcurrent protection. The
combination of such features makes these devices
particularly flexible and suitable to supply
microcontroller in automotive applications.
Device Information(1)
PART NUMBER OUTPUT VOLTAGE
PACKAGE
TPS7B6333-Q1
TPS7B6350-Q1
Fixed 3.3 V
Fixed 5 V
HTSSOP (16)
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Schematic
Battery
IN
EN
WD_EN
Digital Output
MCU O
WD
WTS
TPS7B63xx-Q1
OUT
RADJ
WDO
PG
ROSC
FSEL
DELAY
WRS
MCU Supply
MCU I
MCU RESET
Copyright © 2017, Texas Instruments Incorporated
1
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. PRODUCTION DATA.



TPS7B6350-Q1
TPS7B6333-Q1, TPS7B6350-Q1
SLVSDU9A – FEBRUARY 2017 – REVISED MARCH 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 6
6.6 Switching Characteristics .......................................... 7
6.7 Typical Characteristics .............................................. 8
7 Detailed Description ............................................ 12
7.1 Overview ................................................................. 12
7.2 Functional Block Diagram ....................................... 12
7.3 Feature Description................................................. 12
7.4 Device Functional Modes........................................ 19
8 Application and Implementation ........................ 20
8.1 Application Information............................................ 20
8.2 Typical Application ................................................. 20
9 Power Supply Recommendations...................... 23
10 Layout................................................................... 23
10.1 Layout Guidelines ................................................. 23
10.2 Layout Example .................................................... 23
11 Device and Documentation Support ................. 24
11.1 Documentation Support ........................................ 24
11.2 Related Links ........................................................ 24
11.3 Receiving Notification of Documentation Updates 24
11.4 Community Resources.......................................... 24
11.5 Trademarks ........................................................... 24
11.6 Electrostatic Discharge Caution ............................ 24
11.7 Glossary ................................................................ 24
12 Mechanical, Packaging, and Orderable
Information ........................................................... 24
4 Revision History
Changes from Original (February 2017) to Revision A
Page
• Changed Typical Application Schematic ................................................................................................................................ 1
• Changed Dropout Voltage vs Output Current graph .............................................................................................................. 8
• Changed Load Regulation graph............................................................................................................................................ 8
• Changed TPS7B63xx-Q1 Typical Application Schematic .................................................................................................... 20
2 Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: TPS7B6333-Q1 TPS7B6350-Q1





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