TPS78518BQWDRBRQ1 Texas Instruments Integrated Circuit (Other) In Stock
The TPS78518BQWDRBRQ1 is an automotive-grade 1 A fixed LDO linear regulator with 315 mV nominal dropout voltage and 2.55 V to 6 V input range in an 8-pin WSON package. AEC-Q100 qualified, RoHS-compliant, and available from stock worldwide for automotive applications.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 9
- Lifecycle
- ACTIVE
- Datasheet
- TPS78518BQWDRBRQ1 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.7550(MOQ 250)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1 A output current with only 315 mV nominal dropout voltage (425 mV max) enabling efficient 1.8 V rail generation from a 2.1 V input in battery-powered automotive systems
- Input voltage range of 2.55 V to 6 V with 6.5 V absolute maximum, compatible with automotive 3.3 V and 5 V system rails in ADAS, infotainment, and body control modules
- AEC-Q100 automotive qualification and RoHS-compliant (Pb-free) 8-pin WSON package ensuring reliable operation in harsh automotive temperature and vibration environments
Applications
The TPS78518BQWDRBRQ1 is used in automotive ECUs, ADAS sensor modules, and infotainment systems where a high-accuracy 1 A LDO with low 315 mV dropout is needed to regulate automotive 3.3 V or 5 V rails down to a stable 1.8 V supply for processors, FPGAs, or memory devices. Its AEC-Q100 qualification and compact WSON-8 package also make it suitable for in-vehicle camera modules, automotive radar front-ends, and USB power conditioning circuits requiring low-noise regulated output with minimal thermal dissipation.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.425V |
| Dropout Voltage1-Nom | 0.315V |
| Input Voltage Absolute-Max | 6.5V |
| Input Voltage-Max | 6V |
| Input Voltage-Min | 2.55V |
| JESD-30 Code | S-PDSO-N8 |
| JESD-609 Code | e4 |
| Line Regulation-Max | 0.004% |
| Load Regulation-Max | 0.015% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 150°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 1.8306V |
| Output Voltage1-Min | 1.7694V |
| Output Voltage1-Nom | 1.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC8,.12,25 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Screening Level | AEC-Q100 |
| Surface Mount | YES |
| Technology | BICMOS |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 1.7% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the dropout voltage of the TPS78518BQWDRBRQ1 at full 1 A output current?
The TPS78518BQWDRBRQ1 has a nominal dropout voltage of 315 mV and a maximum of 425 mV at 1 A load current. This low dropout allows efficient regulation down to a 1.8 V output from an input as low as 2.55 V, making it ideal for automotive systems where battery voltage can drop significantly during cold-crank events.
Is the TPS78518BQWDRBRQ1 suitable for use in automotive ADAS sensor power designs?
Yes, the TPS78518BQWDRBRQ1 carries AEC-Q100 automotive qualification and is Pb-free (RoHS-compliant), making it appropriate for ADAS sensor modules, radar, and camera power supplies. Its 2.55 V to 6 V input range is compatible with 3.3 V and 5 V automotive system rails, and the 1 A output supports powering MCUs, DSPs, and imaging sensors in safety-critical automotive applications.
How does the TPS78518BQWDRBRQ1 compare with other 1 A automotive LDOs in terms of input voltage range?
With a 2.55 V to 6 V input voltage range and 6.5 V absolute maximum, the TPS78518BQWDRBRQ1 is optimized for 3.3 V and 5 V post-regulator stages rather than direct battery input. Compared to automotive LDOs rated to 40 V, this device trades wide input voltage range for very low 315 mV dropout and 1 A drive, making it best suited as a point-of-load regulator downstream of a buck converter in automotive power trees.
What package does the TPS78518BQWDRBRQ1 use and how does it affect thermal performance at 1 A?
The TPS78518BQWDRBRQ1 is housed in an 8-pin WSON (S-PDSO-N8) with an exposed thermal pad, enabling efficient heat dissipation into the PCB ground plane. At 1 A with 425 mV maximum dropout, the maximum power dissipation is 425 mW; the thermal pad connection to a copper pour can keep junction temperature well within the automotive-rated limit for most operating conditions.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 250+ | $0.9502 | $237.54 |
| 500+ | $0.9141 | $457.04 |
| 1000+ | $0.8270 | $827.00 |
| 3000+ | $0.7730 | $2319.00 |
| 6000+ | $0.7550 | $4530.00 |
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