TPS3850-Q1 Datasheet, PDF (1/39 Pages) Texas Instruments – Precision Voltage Supervisor with Programmable Window Watchdog Timer

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TPS3850-Q1
SBVS264 – JANUARY 2017
TPS3850-Q1 Precision Voltage Supervisor with Programmable Window 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
• 0.8% Voltage Threshold Accuracy (Max)
• Low Supply Current: I_DD = 10 µA (typ)
• User-Programmable Watchdog Timeout
• User-Programmable Reset Delay
• Factory Programmed Precision Watchdog and
Reset Timers:
– ±15% Accurate WDT and RST Delays
• Open-Drain Outputs
• Precision Over- and Undervoltage Monitoring:
– Supports Common Rails from 0.9 V to 5.0 V
– 4% and 7% Fault Windows Available
– 0.5% Hysteresis
• Watchdog Disable Feature
• Available in a Small 3-mm × 3-mm, 10-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 TPS3850-Q1 combines a precision voltage
supervisor with a programmable window watchdog
timer. The TPS3850-Q1 window comparator achieves
0.8% accuracy (–40°C to +125°C) for both
overvoltage (V_IT+(OV)) and undervoltage (V_IT–(UV))
thresholds. The TPS3850-Q1 also includes accurate
hysteresis on both thresholds, making the device
ideal for use with tight tolerance systems. The
supervisor RESET delay can be set by factory-
programmed default delay settings, or programmed
by an external capacitor. The factory-programmed
RESET delay features a 15% accuracy, high-
precision delay timing.
The TPS3850-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 window watchdog timeouts can be
set by factory-programmed default delay settings, or
programmed by an external capacitor. The watchdog
can be disabled via logic pins to avoid undesired
watchdog timeouts during the development process.
The TPS3850-Q1 is available in a small 3.00-mm ×
3.00-mm, 10-pin VSON package. The TPS3850-Q1
features wettable flanks for easy optical inspection.
Device Information⁽¹⁾
PART NUMBER
PACKAGE BODY SIZE (NOM)
TPS3850-Q1
VSON (10)
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
1.8V
1.2V
TPS3850-Q1
SENSE
VDD
SET1
RESET
SET0
WDO
CRST
WDI
CWD
GND
V_CORE
V_I/O
Microcontroller
RESET
NMI
GPIO
GND
Copyright © 2016, Texas Instruments Incorporated
1
Overvoltage Threshold (V_IT+(OV)) 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.