TPS3851-Q1 Datasheet, PDF (1/34 Pages) Texas Instruments – High-Accuracy Voltage Supervisor with Integrated Watchdog Timer

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TPS3851-Q1
SBVS286 – MARCH 2017
TPS3851-Q1 High-Accuracy Voltage Supervisor with Integrated Watchdog Timer
1 Features
•1 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
• Input Voltage Range: V_DD = 1.6 V to 6.5 V
• 1% Voltage Threshold Accuracy
• Low Supply Current: I_DD = 10 µA (typ)
• User-Programmable Watchdog Timeout
• Factory Programmed Precision Watchdog and
Reset Timers:
– ±15% Accurate WDT and RST Delays
• Open-Drain Outputs
• Precision Undervoltage Monitoring:
– Supports Common Rails from 1.8 V to 5.0 V
– 4% and 7% Undervoltage Thresholds
Available
– 0.5% Hysteresis
• Watchdog Disable Feature
• Available in a Small 3-mm × 3-mm, 8-Pin VSON
Package
2 Applications
• Safety Critical Applications
• Automotive Vision Systems
• Automotive ADAS Systems
• Telematics Control Units
• FPGAs and ASICs
• Microcontrollers and DSPs
3 Description
The TPS3851-Q1 device combines a precision
voltage supervisor with a programmable watchdog
timer. The TPS3851-Q1 comparator achieves a 0.8%
accuracy (–40°C to +125°C) for the undervoltage
(V_ITN) threshold. The TPS3851-Q1 also includes
accurate hysteresis on the undervoltage threshold
making the device ideal for use with tight tolerance
systems. The supervisor RESET delay features a
15% accuracy, high-precision delay timing.
The TPS3851-Q1 includes a programmable
watchdog timer for a wide variety of applications. The
dedicated watchdog output (WDO) enables increased
resolution to help determine the nature of fault
conditions. The watchdog timeouts can be
programmed either by an external capacitor, or by
factory-programmed default delay settings. The
watchdog can be disabled via logic pins to avoid
undesired watchdog timeouts during the development
process.
The TPS3851-Q1 is available in a small 3.00-mm ×
3.00-mm, 8-pin VSON package. The TPS3851-Q1
features wettable flanks that allow for easy optical
inspection.
Device Information⁽¹⁾
PART NUMBER
PACKAGE BODY SIZE (NOM)
TPS3851-Q1
VSON (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit
1.8 V
TPS3851-Q1
VDD
SET1
MR
CWD
RESET
WDO
WDI
GND
V_DD
Microcontroller
RESET
NMI
GPIO
GND
Copyright © 2016, 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.