TPS3852-Q1 Datasheet, PDF (1/28 Pages) Texas Instruments – High-Accuracy Voltage Supervisor with Integrated Watchdog Timer

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TPS3852-Q1
SBVS285 – FEBRUARY 2017
TPS3852-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
• V_DD Input Voltage Range: 1.6 V to 6.5 V
• 0.8% 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
• Manual Reset Input (MR)
• Precision Voltage Monitoring:
– Supports Common Rails from 1.8 V to 5.0 V
– 4% and 7% 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 TPS3852-Q1 is a precision voltage supervisor
with an integrated window watchdog timer. The
TPS3852-Q1 includes a precision undervoltage
supervisor with an undervoltage threshold (V_ITN) that
achieves 0.8% accuracy over the specified
temperature range of –40°C to +125°C. In addition,
the TPS3852-Q1 includes accurate hysteresis making
the device ideal for use with tight tolerance systems.
The supervisor RESET delay features a 15%
accuracy, high-precision delay timer.
The TPS3852-Q1 includes a programmable window
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 to avoid undesired
watchdog timeouts during the development process.
The TPS3852-Q1 is available in a small 3.00-mm ×
3.00-mm, 8-pin VSON package. The TPS3852-Q1
features wettable flanks that allow for easy optical
inspection.
Device Information⁽¹⁾
PART NUMBER
PACKAGE BODY SIZE (NOM)
TPS3852-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.
3.3 V
Typical Application Circuit
TPS3852-Q1
V_DD
SET1
MR
CWD
RESET
WDO
WDI
GND
V_DD
Microcontroller
RESET
NMI
GPIO
GND
Copyright © 2016, Texas Instruments Incorporated
1
Undervoltage Threshold (V_ITN) Accuracy vs
Temperature
0.5
Unit 1
Unit 3
Unit 5
Unit 2
Unit 4
Average
0.3
0.1
-0.1
-0.3
-0.5
-50 -25
0
25
50
75
Temperature (qC)
100 125
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.