TPS7B6850-Q1 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The TPS7B6850-Q1 is an AEC-Q100-qualified 500 mA, 40 V high-voltage ultralow quiescent-current LDO regulator with integrated watchdog timer from Texas Instruments, providing a fixed 5 V output and designed for automotive body electronics and battery-powered industrial systems.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 29
- Lifecycle
- ACTIVE
- Datasheet
- TPS7B6850-Q1 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- AEC-Q100 Grade 1 automotive-qualified 40 V input voltage rating
- 500 mA output current with ultralow quiescent current for always-on systems
- Integrated watchdog timer monitors microcontroller activity without external logic
- Fixed 5 V output suitable for powering automotive microcontrollers and sensors
- Operates across -40°C to 125°C automotive temperature range
Applications
The TPS7B6850-Q1 is designed for automotive body control modules, door-node ECUs, and always-on keep-alive circuits where the 40 V input tolerance handles load-dump transients and the ultralow quiescent current extends the vehicle standby time. The integrated watchdog timer adds system-level supervisory protection, making it a compact single-chip solution for powering safety-relevant microcontrollers in harsh automotive environments.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TPS7B6850-Q1:
Frequently Asked Questions
How does the integrated watchdog timer in the TPS7B6850-Q1 reduce external component count in automotive ECU designs?
The TPS7B6850-Q1 combines a 500 mA LDO regulator with an integrated watchdog timer in a single package, eliminating the need for a separate supervisor IC that would otherwise monitor the microcontroller heartbeat. In a typical automotive body ECU operating from a 12 V battery rail, this integration saves at least one IC and several passive components, reducing BOM cost and PCB area while meeting AEC-Q100 Grade 1 reliability requirements.
Why is the 40 V input rating of TPS7B6850-Q1 important for automotive 12 V battery systems?
Automotive 12 V battery systems can experience load-dump transients reaching 36 V to 40 V when the alternator disconnects suddenly while charging. The TPS7B6850-Q1's 40 V absolute maximum input rating provides a direct margin against these transients, allowing the regulator to protect downstream 5 V microcontrollers and sensor ICs without additional transient-voltage suppression components in many board designs.
In which automotive temperature conditions can the TPS7B6850-Q1 operate, and does it suit under-hood placement?
The TPS7B6850-Q1 is rated for operation across the full automotive temperature range of -40°C to 125°C, which covers both cold-start scenarios in extreme winter climates and the elevated ambient temperatures found in engine-compartment or near-gearbox placements. Its AEC-Q100 Grade 1 qualification confirms that the device has passed the industry-standard stress tests for these under-hood environments.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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