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Texas Instruments TPS54317RHFRG4
- Part No.:
- TPS54317RHFRG4
- Manufacturer:
- Texas Instruments
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TPS54317RHFRG4.pdf
- Description:
- IC REG BUCK ADJ 3A 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,106
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Product details
Overview
TPS54317RHFRG4 from Texas Instruments is a 3-A synchronous step-down DC/DC converter with adjustable output voltage down to 0.9 V, 1% reference accuracy, and 280–1600 kHz programmable switching frequency. It integrates 60-mΩ high-side and low-side MOSFETs, supports 3–6 V input, delivers 1.8 V @ 3 A in typical applications, and features PowerPAD™ thermal enhancement for high-density point-of-load regulation.
For engineers reviewing the TPS54317RHFRG4 datasheet, TPS54317RHFRG4 pinout, TPS54317RHFRG4 application, or TPS54317RHFRG4 equivalent, key selection criteria include its externally compensated architecture, fast transient response enabled by high-gain error amplifier (90–110 dB), thermal shutdown at 135–165°C, and compatibility with 4 mm × 5 mm QFN-24 RHF package layouts requiring AGND/PGND separation and PowerPAD soldering.
Technical Context
The TPS54317RHFRG4 implements a current-mode PWM control architecture with adaptive dead-time and leading-edge blanking (100 ns) to prevent false current-limit triggering. Its error amplifier provides 3–5 MHz unity-gain bandwidth and 1 V/µs slew rate, enabling stable loop compensation across wide load and line variations.
Switching is governed by an internally generated ramp synchronized to external clocks (330–1600 kHz) or set via RT resistor (27.4 kΩ–180 kΩ). The device uses dual ground domains-AGND for analog signals (COMP, VSENSE, SS/ENA) and PGND for high-current paths (PH, VIN, PGND pins)-to minimize noise coupling into regulation feedback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3 A continuous - supports FPGA/DSP core rails without external current sharing |
| Input Voltage Range | 3 V to 6 V - compatible with 3.3 V or 5 V intermediate bus architectures |
| Reference Accuracy | ±1% (0.882–0.900 V) - ensures tight output regulation under load/temperature variation |
| Switching Frequency | 280–1600 kHz - enables compact magnetics and EMI optimization via RT resistor or SYNC signal |
| High-Side rDS(on) | 59–88 mΩ @ VI = 6 V - minimizes conduction loss at full load, improving efficiency above 85% |
| 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 (±3% hysteresis) - provides accurate, glitch-filtered rail monitoring for processor reset sequencing |
Pinout & Package
TPS54317RHFRG4 is housed in a thermally enhanced 24-pin QFN (RHF) package with exposed PowerPAD™ (Pin 25), measuring 4 mm × 5 mm. The package requires soldering the PowerPAD to AGND for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PH (Pins 4–9) | Phase node | Switching node connecting internal MOSFETs to external inductor; must be routed short and low-inductance to minimize ringing |
| PGND (Pins 11–14) | Power ground | High-current return path for low-side FET and input/output capacitors; connects directly to PCB power planes |
| VIN (Pins 15–17) | Input supply | Distributes 3–6 V to internal FETs and bias regulator; requires local 1–10 µF X5R/X7R ceramic bypass |
| VSENSE (Pin 24) | Error amp inverting input | Feedback node for output voltage divider; sensitive to noise-must route away from PH and PGND traces |
| COMP (Pin 1) | Error amplifier output | Connects to external Type III compensation network; high-impedance node requiring clean AGND return |
| SS/ENA (Pin 19) | Enable/slow-start control | Logic-enable threshold at 0.82–1.4 V; capacitor to AGND extends soft-start time to 2.6–4.1 ms |
| RT (Pin 22) | Frequency setting | Resistor to AGND sets fs from 280–1600 kHz; value determines timing precision and EMI profile |
| PWRGD (Pin 2) | Power good open-drain | Asserts high when VSENSE ≥ 90% Vref; used for system reset, fault signaling, or supply sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60-mΩ MOSFETs | Enables single-chip 3-A solution without external switches, reducing BOM count and layout area |
| Externally compensated loop | Supports custom Type II/III compensation for optimized transient response across varied output capacitance |
| Adjustable 280–1600 kHz switching | Allows trade-off between efficiency (lower fs) and size/EMI (higher fs) without changing IC |
| True differential remote sensing | VSENSE pin accepts Kelvin-connected feedback, rejecting PCB trace IR drop for ±1% output accuracy |
| Separate AGND and PGND | Prevents noise coupling from high di/dt paths into error amplifier, maintaining regulation stability at full load |
Applications
| FPGA Core Supply | DSP I/O Rail Regulation |
|---|---|
|
Use Scenario: Powering 1.2 V or 1.8 V core logic of Xilinx Artix-7 or Intel Cyclone V FPGAs with dynamic current demand up to 3 A. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated core voltage with fast load-step response. Use Value: Achieves <1% output deviation during 2-A/µs load transients due to 110 dB error amp gain and 5 MHz bandwidth. |
Use Scenario: Generating 3.3 V I/O supply for TI C66x DSPs in telecom baseband cards where space and thermal density are constrained. IC Role / Device Role / Timing Role: Point-of-load converter placed adjacent to DSP package, minimizing trace inductance and voltage droop. Use Value: Delivers 87% efficiency at 3 A/3.3 V with 4 mm × 5 mm footprint, eliminating need for heatsinks in sealed enclosures. |
| Optical Line Card Bias | Industrial PLC CPU Module |
|
Use Scenario: Providing stable 2.5 V bias to laser driver ICs in SFP+ transceivers operating in temperature-cycled environments. IC Role / Device Role / Timing Role: Secondary regulated rail derived from 5 V backplane, requiring low-noise, high-PSRR output. Use Value: Maintains ±0.5% output regulation over –40°C to 125°C junction temperature via 0.891 V trimmed bandgap reference. |
Use Scenario: Supplying 1.8 V core voltage to ARM Cortex-A9 processors in DIN-rail mounted PLC controllers with extended lifetime requirements. IC Role / Device Role / Timing Role: Main processor PMIC stage with integrated thermal shutdown and power-good signaling for safe boot sequencing. Use Value: Enables reliable cold-start operation below 3 V input using UVLO with 2.95 V turn-on and 0.16 V hysteresis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54318RHLR | Same RHF package, but includes integrated LDO for auxiliary 3.3 V rail; higher quiescent current (12.8 mA vs. 9.6 mA) | Preferred when dual-rail (core + I/O) generation is required on same board area | Select TPS54318RHLR only if auxiliary LDO functionality is needed; otherwise TPS54317RHFRG4 offers lower IQ and simpler compensation |
| MP2332HGTL-Z | 4 A rating, 2.5–6 V input, fixed 500 kHz fs, no RT/SYNC pins; smaller 3 mm × 3 mm QFN-12 package | Suitable for cost-sensitive, space-constrained designs where 3 A margin and frequency flexibility are not required | Choose MP2332HGTL-Z for simplified layout and lower unit cost; avoid if programmable frequency or >3 A headroom is needed |
Compared with TPS54317RHFRG4, TPS54318RHLR adds auxiliary rail capability at the expense of higher static power, while MP2332HGTL-Z trades configurability and thermal robustness for footprint reduction and fixed-frequency simplicity-making TPS54317RHFRG4 optimal for high-performance, thermally demanding PoL applications.
Availability
TPS54317RHFRG4 is available at Aetrix Electronics and suitable for FPGA core supplies, DSP I/O regulation, optical line card biasing, and industrial PLC CPU modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54317RHFRG4 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 technologies, with decades of expertise in high-efficiency DC/DC conversion.
The TPS54317RHFRG4 belongs to TI's SWIFT™ family of synchronous buck converters, designed specifically for high-density, low-voltage point-of-load applications in networking, communications, and industrial computing systems.
FAQ
What is the recommended minimum input voltage for reliable startup of the TPS54317RHFRG4?
The TPS54317RHFRG4 incorporates an undervoltage lockout (UVLO) circuit with a nominal start threshold of 2.95 V and hysteresis of 0.16 V. Reliable startup occurs when VIN exceeds 2.95 V; operation ceases below 2.8 V. This ensures stable initialization even with input rail droop during hot-plug events. The TPS54317RHFRG4 will not attempt regulation until this threshold is met.
Can the TPS54317RHFRG4 operate without an external slow-start capacitor?
Yes, the TPS54317RHFRG4 has an internal slow-start timer of 2.6–4.1 ms, enabling functional startup without an external capacitor on SS/ENA. However, adding a capacitor (e.g., 10 nF) extends soft-start time linearly and suppresses inrush current during cold start. The TPS54317RHFRG4 remains fully operational with or without the capacitor, depending on system sequencing requirements.
What is the maximum allowable voltage on the BOOT pin of the TPS54317RHFRG4?
The absolute maximum rating for the BOOT pin of the TPS54317RHFRG4 is 17 V. During normal operation, BOOT voltage equals PH voltage plus the bootstrap capacitor voltage (typically ~5 V), staying well within this limit. Exceeding 17 V risks permanent damage to the high-side gate driver. A 0.022–0.1 µF low-ESR ceramic capacitor between BOOT and PH is mandatory for proper floating gate drive.
How does the TPS54317RHFRG4 handle thermal overload conditions?
The TPS54317RHFRG4 integrates thermal shutdown protection that triggers at a junction temperature of 135–165°C, with 10°C hysteresis. Upon trip, the device halts switching and holds output in high-impedance state until temperature falls below the hysteresis threshold. This protects both the TPS54317RHFRG4 and downstream circuitry during sustained overload or inadequate PCB heat sinking.
Is the TPS54317RHFRG4 pin-compatible with other devices in the TPS543xx family?
No, the TPS54317RHFRG4 is not pin-compatible with most other TPS543xx variants due to unique pin assignments-including dual PGND (Pins 11–14), triple VIN (Pins 15–17), and dedicated AGND (Pins 23, 25). While it shares the 24-pin RHF package outline with TPS54318RHLR, differences in function mapping (e.g., VBIAS location, NC pins) require separate PCB layout. Always verify pinout using the official SLVS619B datasheet before substitution.
TPS54317RHFRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.891V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 3A
- Frequency - Switching:
- 350kHz, 550kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (5x4)
TPS54317RHFRG4 FAQ
1.How can I place an order for TPS54317RHFRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54317RHFRG4 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 TPS54317RHFRG4 reliable?
The price and inventory of TPS54317RHFRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54317RHFRG4 is usually 5 days.
3.What payment methods are accepted for TPS54317RHFRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54317RHFRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54317RHFRG4?
TPS54317RHFRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54317RHFRG4 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 TPS54317RHFRG4?
For technical support, including TPS54317RHFRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54317RHFRG4 requirements.
6.How does Aetrix verify that TPS54317RHFRG4 is sourced from the original manufacturer or authorized distributors?
All TPS54317RHFRG4 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 TPS54317RHFRG4 meets industry standards.
7.What is the process for return or replacement of TPS54317RHFRG4?
All TPS54317RHFRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54317RHFRG4, 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 TPS54317RHFRG4 part is unused and in its original packaging.
Return procedure for TPS54317RHFRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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