In automotive microcontroller or microprocessor power-supply applications, the watchdog is used to monitor the microcontroller working status to prevent software runaway. The watchdog must be independent of the microcontroller in a reliable system.
The TPS7B63-Q1 is a 300mA watchdog low-dropout regulator (LDO) designed for an operating voltage up to 40V, with typical quiescent current of only 19µA at light load. The device integrates a programmable function for selecting a window watchdog or standard watchdog, with an external resistor to set the watchdog time within 10% accuracy.
The PG pin on the TPS7B63-Q1 indicates when the output voltage is stable and in regulation. The power-good delay period and power-good threshold can be adjusted by selecting external components. The device also features integrated short-circuit and overcurrent protection. The combination of such features makes this device particularly flexible and designed to supply a microcontroller in automotive applications.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | TPS7B63-Q1 Automotive, 300mA, 40V High-Voltage, Ultra-Low-Quiescent-Current Watchdog LDO datasheet (Rev. D) | PDF | HTML | 06 Jun 2025 |
| Application note | An empirical analysis of the impact of board layout on LDO thermal performance (Rev. A) | PDF | HTML | 23 Sep 2025 | |
| Functional safety information | TPS7B63-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A) | 10 Jun 2020 | ||
| Application note | A Topical Index of TI LDO Application Notes (Rev. F) | 27 Jun 2019 | ||
| E-book | LDO Basics (Rev. A) | 08 Apr 2019 | ||
| Technical article | Discrete SBCs: versatile and scalable solutions for any application | PDF | HTML | 27 Jul 2017 | |
| Technical article | LDO basics: dropout | PDF | HTML | 16 Mar 2017 |
For additional terms or required resources, click any title below to view the detail page where available.
The TPS7B6350EVM evaluation module (EVM) helps you evaluate the operation and performance of the TPS7B6350-Q1 watchdog low-dropout (LDO) regulator. The TPS7B6350-Q1 is a monolithic integrated 40-V 300-mA watchdog LDO regulator in a 16-pin HTSSOP package. The device is (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |
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