TPS3852 Datasheet, PDF (1/30 Pages) Texas Instruments – Precision Voltage Supervisor with Programmable Window Watchdog Timer

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TPS3852
SBVS302 – NOVEMBER 2016
TPS3852 Precision Voltage Supervisor with Programmable Window Watchdog Timer
1 Features
•1 VDD Input Voltage Range: 1.6 V to 6.5 V
• 0.8% Voltage Threshold Accuracy
• Low Supply Current: I_DD = 10 µA (typical)
• 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 Undervoltage Monitoring
– Supports Common Rails from 1.8 V to 5 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
• Telematics Control Units
• High-Reliability Industrial Systems
• Patient Monitoring
• Industrial Control Systems
• FPGAs and ASICs
• Microcontrollers and DSPs
Space
Space
Typical Application Circuit
3.3 V
TPS3852
VDD
SET1
MR
CWD
RESET
WDO
WDI
GND
VDD
Microcontroller
RESET
NMI
GPIO
GND
3 Description
The TPS3852 is a precision voltage supervisor with
an integrated window watchdog timer. The TPS3852
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 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 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 is available in a small 3.00-mm × 3.00-
mm, 8-pin VSON package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE BODY SIZE (NOM)
TPS3852
VSON (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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
Copyright © 2016, Texas Instruments Incorporated
-0.3
-0.5
-50 -25
0
25
50
75
Temperature (qC)
100 125
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.