TPS79850QDGNRDL Texas Instruments In Stock
TPS79850QDGNRDL is a 500 mA low-dropout linear regulator by Texas Instruments with a fixed 5.0 V output and AEC-Q100 automotive qualification. Key specs: 500 mA output current, 200 mV typical dropout voltage, -40°C to 125°C operating temperature range. Available in a compact 8-pin WSON package for automotive and industrial applications.
- Manufacturer
- Texas Instruments
- Package
- —
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- AEC-Q100 Grade 1 automotive-qualified LDO regulator with -40°C to 125°C temperature range for under-hood and body control module designs
- 500 mA output current with 200 mV typical dropout voltage enabling high-efficiency 5 V rail generation from 5.2 V input supplies
- 8-pin WSON package (DGN) with exposed thermal pad enables compact, low-profile PCB integration in space-constrained automotive modules
Applications
The TPS79850QDGNRDL is designed for automotive ECUs, ADAS sensor modules, and body control units requiring a stable 5.0 V regulated supply from a 5.2 V to 12 V input rail in harsh -40°C to 125°C environments. Its AEC-Q100 Grade 1 qualification ensures reliable operation through automotive temperature cycling and reliability screening. The low 200 mV dropout voltage minimizes power dissipation and extends thermal margin in thermally-constrained automotive PCB assemblies.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output voltage and current does the TPS79850QDGNRDL provide for automotive power supply rails?
The TPS79850QDGNRDL provides a fixed 5.0 V regulated output at up to 500 mA continuous load current. This makes it suitable for powering 5 V microcontrollers, sensor interfaces, and CAN transceivers in automotive ECUs directly from a 12 V or 5.2 V post-regulator bus.
What automotive reliability qualification does the TPS79850QDGNRDL carry, and over what temperature range?
The TPS79850QDGNRDL is AEC-Q100 Grade 1 qualified, covering an ambient operating temperature range of -40°C to 125°C. AEC-Q100 Grade 1 is the standard qualification level for automotive electronics deployed in locations experiencing high thermal stress, such as engine compartment and transmission control modules.
How does the 200 mV typical dropout voltage of the TPS79850QDGNRDL reduce thermal dissipation compared to standard LDOs?
With only 200 mV typical dropout at 500 mA, the TPS79850QDGNRDL dissipates as little as 100 mW when the input is just above 5.0 V, compared to 500 mW or more for older LDOs with 1 V dropout under the same load. This lower dissipation reduces junction temperature rise and extends component lifetime in sealed automotive enclosures.
Which package does the TPS79850QDGNRDL use, and what benefit does the exposed thermal pad provide?
The TPS79850QDGNRDL uses an 8-pin WSON package (DGN footprint) with an exposed metal thermal pad on the bottom. The thermal pad connects directly to the PCB ground plane, reducing thermal resistance and allowing the device to sustain 500 mA output current across the full -40°C to 125°C automotive temperature range without requiring an external heatsink.
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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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