TPS54315QPWRDN Texas Instruments In Stock
TPS54315QPWRDN is a 3 A synchronous step-down DC-DC converter by Texas Instruments with automotive-grade qualification. Key specs: 4.5 V to 18 V input range, 600 kHz switching frequency, and adjustable output down to 0.9 V. From competitive pricing, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TPS54315QPWRDN?
- 3 A continuous output current with integrated high-side and low-side MOSFETs for compact high-efficiency buck conversion up to 95% efficiency
- AEC-Q100 automotive qualification supporting -40°C to +125°C junction temperature for reliable operation in harsh under-hood environments
- Adjustable output voltage from 0.9 V with 4.5 V to 18 V input range covering 5 V, 12 V, and vehicle battery supply rails
What is TPS54315QPWRDN used for?
The TPS54315QPWRDN is designed for automotive infotainment, ADAS sensor modules, and body control units requiring a compact, high-efficiency step-down power supply from a 12 V vehicle bus. It is also suitable for industrial 24 V rail systems and factory automation controllers where AEC-Q100-grade reliability and a wide -40°C to +125°C operating range are needed. Its integrated MOSFETs and small PWP package reduce external component count and board space in densely packed automotive PCB designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for TPS54315QPWRDN?
Compatible alternatives and drop-in replacements for TPS54315QPWRDN:
Switching Regulator, Voltage-mode, 3A, 700kHz Switching Freq-Max, BICMOS, PDSO20
Switching Regulator, Voltage-mode, 3A, 700kHz Switching Freq-Max, PDSO20
Switching Regulator, Voltage-mode, 3A, 700kHz Switching Freq-Max, PDSO20
Switching Regulator, Voltage-mode, 3A, 700kHz Switching Freq-Max, PDSO20
Switching Regulator, Voltage-mode, 3A, 700kHz Switching Freq-Max, PDSO20
Switching Regulator, Voltage-mode, 3A, 700kHz Switching Freq-Max, PDSO20
Frequently Asked Questions
What is the input voltage range of the TPS54315QPWRDN, and is it compatible with a 12 V automotive battery bus?
The TPS54315QPWRDN accepts an input voltage from 4.5 V to 18 V, which comfortably covers the 9 V to 16 V range seen on a nominal 12 V automotive battery bus during cold-crank and load-dump events, making it directly suitable for vehicle power rails without an additional pre-regulator.
How does the TPS54315QPWRDN's AEC-Q100 qualification benefit automotive system designers?
AEC-Q100 qualification means the TPS54315QPWRDN has passed standardized automotive reliability stress tests including thermal cycling across -40°C to +125°C, humidity exposure, and electrostatic discharge tests, giving system designers documented evidence that the device meets automotive quality requirements and reducing the need for additional qualification testing.
What output current can the TPS54315QPWRDN deliver, and how does its integrated MOSFET design help?
The device delivers up to 3 A continuous output current using integrated high-side and low-side MOSFETs with optimized on-resistance, which eliminates the need for external switching transistors, reduces PCB area by approximately 30% compared to a controller-plus-FET solution, and simplifies thermal management at full load.
At what switching frequency does the TPS54315QPWRDN operate, and how does that affect inductor selection?
The TPS54315QPWRDN switches at 600 kHz, allowing use of inductors in the 1 µH to 4.7 µH range rather than the bulkier 10 µH to 47 µH inductors required at 100 kHz to 200 kHz, reducing overall solution height and board footprint in space-constrained automotive and industrial designs.
What is the lowest output voltage the TPS54315QPWRDN can regulate, and which processor core rails does it support?
The TPS54315QPWRDN can regulate its output down to 0.9 V via an external resistor divider, covering modern SoC and FPGA core rails at 1.0 V, 1.1 V, 1.2 V, and 1.8 V commonly found in automotive ADAS processors, making it a flexible single-design solution for multiple voltage rails on the same platform.
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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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