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Texas Instruments TPS54315QPWPRQ1
- Part No.:
- TPS54315QPWPRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54315QPWPRQ1.pdf
- Description:
- IC REG BUCK 2.5V 3A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,060
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Product details
Overview
TPS54315QPWPRQ1 from Texas Instruments is an automotive-grade synchronous buck PWM converter with integrated 60-mΩ high- and low-side MOSFETs, delivering up to 3 A continuous output current at a fixed 2.5 V output voltage with ±2.5% regulation over temperature and load. It operates from a 3-V to 6-V input, features internal compensation, and supports 350 kHz or 550 kHz fixed switching frequencies via FSEL pin control. It is used in point-of-load regulation for automotive telematics and FPGA power rails.
For engineers reviewing the TPS54315QPWPRQ1 datasheet, TPS54315QPWPRQ1 pinout, TPS54315QPWPRQ1 application, or TPS54315QPWPRQ1 equivalent, key selection considerations include its AEC-Q100 qualification, 2.5 V fixed output with 1% initial accuracy, thermally enhanced 20-pin HTSSOP PowerPAD™ package, and integrated current limiting and thermal shutdown protection.
Technical Context
The TPS54315QPWPRQ1 implements a voltage-mode PWM control architecture with a high-performance error amplifier (26 dB open-loop gain, 3–5 MHz unity-gain bandwidth) and adaptive dead-time logic to manage MOSFET timing. Its oscillator supports dual fixed frequencies (350 kHz/550 kHz) selected by FSEL logic level, or externally adjustable frequency (280–700 kHz) via RT resistor.
It integrates undervoltage lockout (UVLO start at 2.95 V, hysteresis 0.14 V), slow-start/enable functionality with 4.7 ms internal ramp time, and a dedicated VBIAS regulator (2.7–2.95 V output) for internal circuitry. The device uses separate AGND and PGND terminals to isolate noise-sensitive analog paths from high-current power return paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V with ±2.5% regulation across −40°C to 125°C junction temperature and 0–3 A load. |
| Input Voltage Range | 3 V to 6 V - supports direct connection to automotive 5 V or 3.3 V distributed rails without pre-regulation. |
| Continuous Output Current | 3 A - sustained delivery enabled by 60-mΩ integrated MOSFETs and PowerPAD™ thermal enhancement. |
| Switching Frequency | 350 kHz or 550 kHz (FSEL-selectable); externally adjustable 280–700 kHz via RT resistor - enables EMI optimization and inductor size trade-offs. |
| Quiescent Current | 8.4–12.8 mA at 550 kHz - balances light-load efficiency and transient responsiveness in always-on automotive modules. |
| Thermal Shutdown | 135–165°C trip point with 10°C hysteresis - protects against sustained overload or poor PCB thermal design. |
| Power Good Threshold | 90% of Vref (≈0.802 V) with 3% hysteresis - provides reliable reset signaling for microcontrollers and FPGAs during power sequencing. |
Pinout & Package
The TPS54315QPWPRQ1 is housed in a thermally enhanced 20-pin HTSSOP (PWP) PowerPAD™ package with exposed thermal pad soldered to AGND. Package dimensions are 6.4 mm × 6.3 mm × 1.2 mm, requiring minimum 5 mm² exposed copper area and ≥10 thermal vias for full 3-A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return for VSENSE divider, SS/ENA capacitor, VBIAS bypass, and RT resistor - must connect directly to PowerPAD™ for stability. |
| VSENSE (Pin 2) | Error amplifier inverting input | Direct feedback node for output voltage sensing - requires Kelvin connection to output rail to reject IR drop errors. |
| NC (Pin 3) | No internal connection | Unbonded terminal - must remain unconnected and unstubbed on PCB. |
| PWRGD (Pin 4) | Open-drain power-good indicator | Sinks current when VSENSE < 90% Vref - drives processor reset or system enable logic with 35 µs deglitch filtering. |
| BOOT (Pin 5) | Bootstrap supply for high-side gate driver | Connects 0.022–0.1 µF ceramic capacitor to PH - enables high-side FET drive above VIN without external charge pump. |
| PH (Pins 6–10) | Phase node | Switching node connecting internal MOSFETs to external inductor - requires low-inductance layout and minimal trace length. |
| RT (Pin 20) | Frequency-setting resistor input | Resistor to AGND sets switching frequency from 280–700 kHz - value determines loop bandwidth and filter component sizing. |
| SS/ENA (Pin 18) | Slow-start/enable control | Logic-high (>1.2 V) enables operation; capacitor to AGND extends soft-start time - prevents inrush current into downstream capacitance. |
| VBIAS (Pin 17) | Internal bias regulator output | Supplies 2.7–2.95 V to internal circuits - requires 0.1–1 µF X7R/X5R ceramic bypass to AGND, placed adjacent to pin. |
| VIN (Pins 14–16) | Main input supply | 3–6 V input for power switches and VBIAS regulator - each pin must be decoupled with 1–10 µF ceramic capacitor to PGND near package. |
| PGND (Pins 11–13) | Power ground return | High-current return path for low-side FET and input/output capacitors - connects to large copper pour and thermal vias under PowerPAD™. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation in automotive powertrain and body electronics systems. |
| Integrated 60-mΩ MOSFETs | Enables compact 3-A solution without external power stage - reduces BOM count and layout complexity vs discrete controllers. |
| Internally compensated control loop | Eliminates need for external compensation network - simplifies design while maintaining stable response with 4.7–10 µH inductors. |
| Fast transient recovery (10–20 µs) | Minimizes output voltage deviation during load steps - critical for powering DSPs and FPGAs with dynamic current demands. |
| PowerPAD™ thermal interface | Reduces θJA to 26°C/W with proper PCB layout - allows full 3-A output at 70°C ambient without heatsink. |
Applications
| Automotive Telematics Module | FPGA Core Power Supply |
|---|---|
Use Scenario: Powering GPS, cellular modem, and MCU subsystems in vehicle infotainment head units operating from 5 V battery rail. IC Role / Device Role / Timing Role: Primary 2.5 V point-of-load regulator delivering regulated 3 A to multi-rail PMIC or directly to SoC I/O banks. Use Value: AEC-Q100 qualification ensures reliability in automotive thermal and vibration environments; fast transient response maintains FPGA configuration integrity during RF burst transmission. | Use Scenario: Providing stable 2.5 V core voltage to Xilinx Spartan-7 or Intel Cyclone V FPGA I/O banks in industrial edge gateway designs. IC Role / Device Role / Timing Role: Synchronous buck converter with integrated FETs and internal compensation - replaces controller + external MOSFET solution. Use Value: Fixed 2.5 V output with ±2.5% tolerance meets FPGA I/O voltage requirements; 350 kHz switching frequency balances efficiency and EMI filtering component size. |
| Point-of-Load for DSP in ADAS Camera | Low-Voltage Network Processor Rail |
Use Scenario: Supplying 2.5 V to TI C6000 DSP in rear-view camera ECU where space and thermal constraints limit use of discrete regulators. IC Role / Device Role / Timing Role: High-density DC/DC converter with PowerPAD™ thermal dissipation - mounted directly on 1-oz copper plane for passive cooling. Use Value: 60-mΩ MOSFETs and 3-A rating support peak DSP processing loads; UVLO and thermal shutdown prevent fault propagation in safety-critical vision systems. | Use Scenario: Generating 2.5 V for Marvell ARMADA 37xx network processor in automotive Ethernet gateway requiring robust startup sequencing. IC Role / Device Role / Timing Role: Regulator with PWRGD output and SS/ENA control - coordinates power-up with main SoC and PHY devices. Use Value: Power good signal asserts only after output reaches 90% of 2.5 V with 3% hysteresis - ensures clean reset release for deterministic boot sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54316QPWPRQ1 | Fixed 3.3 V output; identical package, pinout, and feature set except output voltage and internal slow-start time (6.1 ms vs 4.7 ms). | Used where system requires 3.3 V I/O rail instead of 2.5 V - no layout change needed but feedback network is internal. | Select when target output voltage matches 3.3 V and same thermal/power specs are required. |
| LM61480QRNRRQ1 | Higher 8-A rating, 2.2-MHz switching, adjustable output (0.8–5.5 V), different pinout and package (16-pin WQFN), no internal compensation. | Supports higher current and faster transient loads in next-gen ADAS ECUs - requires external compensation and layout redesign. | Choose for future-proofing or when >3 A output or programmable voltage is mandatory; not drop-in compatible. |
Compared with TPS54315QPWPRQ1, TPS54316QPWPRQ1 offers identical mechanical and thermal performance with only output voltage and slow-start timing changed - making it ideal for voltage-scaled variants in the same platform. LM61480QRNRRQ1 provides higher performance but demands full schematic and layout revision due to non-pin-compatible packaging and external compensation requirements.
Availability
TPS54315QPWPRQ1 is available at Aetrix Electronics and suitable for automotive telematics, FPGA power delivery, ADAS camera modules, and industrial network processor applications requiring stable component supply with AEC-Q100 compliance and long-term production continuity.
Supply support for TPS54315QPWPRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management ICs, with deep expertise in automotive-grade reliability and system-level power design.
The TPS543xx-Q1 family delivers highly integrated, thermally optimized synchronous buck regulators targeting automotive point-of-load applications - designed to replace discrete controller+FET solutions while meeting stringent AEC-Q100 and ISO 16750 requirements.
FAQ
What is the output voltage tolerance of the TPS54315QPWPRQ1 over temperature and load?
The TPS54315QPWPRQ1 delivers a fixed 2.5 V output with ±2.5% regulation across the full operating range: −40°C to +125°C junction temperature and 0–3 A load current. This specification is verified per the recommended operating conditions in the SGLS242G datasheet, and includes line and load regulation contributions. Initial accuracy is ±1% at 25°C, improving system margin for FPGA and DSP I/O voltage compliance.
Does the TPS54315QPWPRQ1 require external compensation components?
No, the TPS54315QPWPRQ1 features an internally compensated control loop optimized for standard 4.7 µH to 10 µH inductors and typical output capacitor values. External compensation is neither required nor supported - the error amplifier and PWM comparator are fully integrated with fixed compensation network. This eliminates tuning effort and reduces bill-of-materials cost compared to controller-only solutions.
How is the switching frequency configured on the TPS54315QPWPRQ1?
The TPS54315QPWPRQ1 supports three frequency modes: (1) 350 kHz with FSEL ≤ 0.8 V, (2) 550 kHz with FSEL ≥ 2.5 V, or (3) externally adjustable 280–700 kHz by connecting a resistor from RT to AGND while leaving FSEL floating. The RT resistor value determines frequency per the equation fSW ≈ 500 kHz × (100 kΩ / R). No external clock synchronization is required for basic operation.
What thermal management is required for full 3-A operation of the TPS54315QPWPRQ1?
For continuous 3-A output, the TPS54315QPWPRQ1 requires its PowerPAD™ thermal pad to be soldered to a minimum 5 mm² exposed AGND copper area with ≥10 thermal vias (6 × 0.013" in pad, 4 × 0.018" under package). With this layout on a 2-layer 3" × 3" board, θJA is 26°C/W, enabling full load at 70°C ambient. Without soldered PowerPAD™, power rating drops to 0.69 W at 85°C ambient.
Is the TPS54315QPWPRQ1 pin-compatible with other members of the TPS543xx-Q1 family?
Yes, all TPS54311QPWPRQ1 through TPS54316QPWPRQ1 share identical 20-pin HTSSOP (PWP) PowerPAD™ packaging, pinout, and electrical interface - including AGND, PGND, VSENSE, BOOT, PH, PWRGD, SS/ENA, VBIAS, VIN, RT, and FSEL assignments. Only output voltage, internal slow-start time, and minor parameter tolerances differ between variants - enabling voltage-scaled design reuse without PCB revision.
TPS54315QPWPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 350kHz, 550kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS54315QPWPRQ1 FAQ
1.How can I place an order for TPS54315QPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54315QPWPRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS54315QPWPRQ1 reliable?
The price and inventory of TPS54315QPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54315QPWPRQ1 is usually 5 days.
3.What payment methods are accepted for TPS54315QPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54315QPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54315QPWPRQ1?
TPS54315QPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54315QPWPRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS54315QPWPRQ1?
For technical support, including TPS54315QPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54315QPWPRQ1 requirements.
6.How does Aetrix verify that TPS54315QPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS54315QPWPRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS54315QPWPRQ1 meets industry standards.
7.What is the process for return or replacement of TPS54315QPWPRQ1?
All TPS54315QPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54315QPWPRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS54315QPWPRQ1 part is unused and in its original packaging.
Return procedure for TPS54315QPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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