Automotive, high-accuracy voltage supervisor with Integrated watchdog timer
Product details
Parameters
Package | Pins | Size
Features
- 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: VDD = 1.6 V to 6.5 V
- 1% Voltage Threshold Accuracy
- Low Supply Current: IDD = 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
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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 (VITN) 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.
Exact equivalent in functionality and parametrics to the compared device:
Similar but not functionally equivalent to the compared device:
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | TPS3851-Q1 High-Accuracy Voltage Supervisor with Integrated Watchdog Timer datasheet | Mar. 30, 2017 |
Functional safety information | TPS3851-Q1 Functional Safety FIT Rate and Failure Mode Distribution | Dec. 19, 2019 | |
E-book | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | Jun. 28, 2019 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- High threshold accuracy: 0.8%
- Low IQ: 10 µA (typical)
- Manual reset (MR) input
- Open-drain RESET output
- User-programmable watchdog timer
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
-
download PMP22030 BOM.pdf (60KB) -
download PMP22030 Assembly Drawing.pdf (192KB) -
download PMP22030 PCB.pdf (1005KB) -
download PMP22030 CAD Files.zip (1134KB) -
download PMP22030 Gerber.zip (600KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SON (DRB) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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