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Texas Instruments TPS53316RGTT
- Part No.:
- TPS53316RGTT
- Manufacturer:
- Texas Instruments
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TPS53316RGTT.pdf
- Description:
- IC REG BUCK ADJ 5A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:480
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Product details
Overview
TPS53316RGTT from Texas Instruments is a high-efficiency, 5-A synchronous step-down regulator with integrated N-channel MOSFETs, operating from 2.9 V to 6 V input and delivering adjustable output from 0.6 V to 0.8 × VIN. It features voltage-mode control, selectable switching frequencies (750 kHz/1.1 MHz/2 MHz), and supports all-MLCC output capacitor designs for compact power delivery in space-constrained applications such as FPGA core rails and point-of-load converters.
For engineers reviewing the TPS53316RGTT datasheet, TPS53316RGTT pinout, TPS53316RGTT application, or TPS53316RGTT equivalent, key selection considerations include its 16-pin QFN (3 mm × 3 mm) package, integrated bootstrap switch, prebias start-up capability, soft-stop output discharge, and configurable overcurrent protection thresholds (4.5 A or 6.5 A).
Technical Context
The TPS53316RGTT implements voltage-mode PWM control with three operational modes-forced continuous conduction (FCCM), diode emulation (DE), and high-efficiency forced (HEF)-enabling dynamic efficiency optimization across load ranges. Its internal 3.3-V LDO (VREG3) powers analog circuitry and controls EN logic, while dual OCP detection monitors both high-side and low-side FET currents independently.
Switching frequency and overcurrent threshold are set via resistor networks on the RF/OC pin, and soft-start time is configured through the PS pin using 10-µA current-sourcing logic. The device uses a precision 0.6-V reference with ±1.25% tolerance over –40°C to 85°C and integrates thermal shutdown at 140°C with 40°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9 V to 6 V - supports single-rail 3.3-V and 5-V system inputs without auxiliary bias supplies. |
| Output Current | Continuous 5 A - delivers full rated current with <90% efficiency down to 100 mA load in DE mode. |
| Switching Frequency | Selectable: 750 kHz / 1.1 MHz / 2 MHz - enables trade-off between size (inductor/capacitor) and efficiency/noise. |
| OCP Threshold | Configurable 4.5 A or 6.5 A - set by external resistor on RF/OC pin; includes hiccup recovery (14.5 ms typical). |
| Reference Voltage | 0.6 V ±1.25% - ensures tight output regulation accuracy across temperature and line/load conditions. |
| Package | 16-pin QFN, 3 mm × 3 mm - thermally enhanced with exposed PowerPad; RθJB = 18.3°C/W for PCB-level heat dissipation. |
| Protection Features | OVP/UVP/OTP/UVLO - includes open-drain PGD with 83–117% FB window, soft-stop discharge, and prebias start-up support. |
Pinout & Package
The TPS53316RGTT is housed in a green RoHS-compliant, lead-free 16-pin QFN package (RGT) with 3.00 mm × 3.00 mm body size and an exposed thermal PowerPad requiring 4–5 vias to PGND for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, EN | Enable input | Active-high logic with 2.25-MΩ internal pull-up to VIN; threshold defined by VIN-dependent hysteresis (e.g., 0.95–1.25 V at VIN = 5 V). |
| 2, RF/OC | Frequency & OCP configuration | 10-µA current source; resistor-to-GND sets fSW and OCP level per TI Table 1 (e.g., 57.6 kΩ → 750 kHz / 6.5 A). |
| 3, PGD | Power good flag | Open-drain output asserting high when FB is within 83–117% of 0.6 V reference; requires external pull-up. |
| 4, VBST | Bootstrap supply | Connects external bootstrap capacitor to SW; enables high-side gate drive with internal bootstrap switch. |
| 5–7, SW | Switch node | Three parallel pins for low-inductance connection to output inductor; carries high di/dt switching current. |
| 8, PS | Mode configuration | 10-µA current source; resistor-to-GND selects FCCM/DE/HEF mode and soft-start multiplier (1× or 4×). |
| 9, COMP | Compensation node | Type III compensation terminal; connects external RC network to stabilize feedback loop across operating conditions. |
| 10, FB | Voltage feedback | Senses output via resistive divider; determines regulation setpoint, OVP/UVP, and PGD status. |
| 11, AGND | Analog ground | Reference for internal error amplifier and reference; must be separated from PGND and tied at single point. |
| 12, VREG3 | 3.3-V LDO output | Internal analog supply; enabled by EN; powers internal circuitry and can serve as bias for external components. |
| 13–14, VIN | Main input supply | Dual pins reduce IR drop and improve current sharing for 2.9–6 V input; also supplies gate driver circuitry. |
| 15–16, PGND | Power ground | High-current return path for MOSFETs and inductor; connects directly to PowerPad for thermal and EMI control. |
| PowerPad | Thermal pad | Exposed copper pad beneath package; must be soldered and connected via ≥4 thermal vias to internal/external GND planes. |
Key Features
| Feature | Design Value |
|---|---|
| SmoothPWM™ Auto-Skip Eco-Mode™ | Enables diode-emulation operation below ~1 A, reducing light-load quiescent current and maintaining >85% efficiency at 100 mA. |
| All-MLCC Output Support | Eliminates electrolytic capacitors; allows use of two 22-µF ceramic caps for full 5-A output with low ESR and long lifetime. |
| Prebias Start-Up | Allows safe startup into precharged output (e.g., hot-swap or rail sequencing); prevents reverse current flow through low-side FET. |
| Integrated Bootstrap Switch | Removes need for external bootstrap diode; reduces BOM count and improves reliability in high-frequency operation. |
| Soft-Stop Output Discharge | Activates internal 60-Ω discharge transistor when EN is low, rapidly collapsing output voltage without external circuitry. |
Applications
| FPGA Core Power Supply | ASIC I/O Rail Regulator |
|---|---|
Use Scenario: Powers 0.8–1.2-V core domains of Xilinx Artix-7 or Intel Cyclone V FPGAs with fast transient response and tight regulation. IC Role / Device Role / Timing Role: Primary synchronous buck converter delivering up to 5 A with <±1% output accuracy and <50-µs load-step recovery. Use Value: Enables single-chip solution with no external gate drivers or bootstrap diodes, reducing layout area by >30% vs discrete controllers. | Use Scenario: Generates 1.8-V or 2.5-V I/O supply for SoCs with variable load profiles and strict ripple limits (<20 mVpp). IC Role / Device Role / Timing Role: Adjustable-output buck regulator supporting dynamic voltage scaling (DVS) via FB divider reconfiguration. Use Value: Configurable OCP (4.5 A/6.5 A) and frequency (750 kHz/1.1 MHz) allow optimization for either low-noise or high-density layouts. |
| Industrial PLC CPU Module | Networking ASIC Point-of-Load |
Use Scenario: Supplies 1.0-V core rail to ARM Cortex-A9-based PLC processors operating in –40°C to 85°C ambient. IC Role / Device Role / Timing Role: Robust DC/DC converter with thermal shutdown (140°C), UVLO (2.8 V), and PGD monitoring for system-level fault reporting. Use Value: Integrated protections eliminate need for external supervisors; RθJB = 18.3°C/W enables convection-only cooling in sealed enclosures. | Use Scenario: Provides 1.2-V supply to multi-gigabit Ethernet PHYs with bursty traffic causing rapid 0–3-A load transients. IC Role / Device Role / Timing Role: High-bandwidth voltage-mode controller with 14-MHz unity-gain bandwidth and 5-V/µs slew rate for stable loop response. Use Value: HEF mode maintains CCM during light loads, ensuring consistent transient behavior across full load range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS53355RGLT | Higher 30-A rating, 3-phase controller with external FETs; no integrated power stage. | Targets higher-power systems (>10 A) requiring phase interleaving and digital PMBus interface. | Choose TPS53355RGLT only when >5 A output or programmable telemetry is required; not a drop-in replacement. |
| MP2315DJ-LF-Z | Monolithic 6-A buck; fixed 500-kHz fSW, no frequency/OCP configurability, no prebias start-up. | Suitable for cost-sensitive consumer applications where design flexibility and robustness are secondary to BOM cost. | Use MP2315DJ-LF-Z for simpler, lower-cost designs lacking advanced protection or configurability needs. |
Compared with TPS53316RGTT, TPS53355RGLT offers scalability and telemetry but requires external power stages and complex layout, while MP2315DJ-LF-Z sacrifices configurability and industrial-grade protections for integration and cost-making TPS53316RGTT optimal for mid-power, feature-rich embedded power rails.
Availability
TPS53316RGTT is available at Aetrix Electronics and suitable for FPGA core supplies, ASIC I/O rails, and industrial PLC CPU modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS53316RGTT 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 TPS533xx family was designed specifically for high-density, low-voltage point-of-load applications in computing, communications, and industrial systems-emphasizing integration, configurability, and thermal efficiency in compact QFN packages.
FAQ
What is the maximum output current capability of the TPS53316RGTT?
The TPS53316RGTT delivers continuous 5-A output current under recommended operating conditions (VIN = 3.3 V or 5 V, TA ≤ 85°C, proper thermal design). Peak current capability reaches 6.5 A with appropriate OCP configuration and layout, but sustained operation above 5 A requires careful thermal management due to junction temperature limits.
Does the TPS53316RGTT support prebias start-up functionality?
Yes, the TPS53316RGTT explicitly supports prebias start-up, allowing safe activation into an already charged output rail without reverse current flow. This is confirmed in the datasheet's Feature list and Section 7.3.4, and is enabled by internal control logic that disables the low-side FET during initial ramp-up.
How is switching frequency selected on the TPS53316RGTT?
Switching frequency on the TPS53316RGTT is selected via resistor configuration on the RF/OC pin: grounding selects 1.1 MHz / 6.5 A, 57.6 kΩ to GND selects 750 kHz / 6.5 A, and 105 kΩ to GND selects 2 MHz / 4.5 A. The pin sources 10 µA, and voltage division determines both fSW and OCP threshold simultaneously.
What package type and dimensions does the TPS53316RGTT use?
The TPS53316RGTT uses a 16-pin QFN package (RGT variant) with nominal body dimensions of 3.00 mm × 3.00 mm and an exposed thermal PowerPad. It complies with RoHS and lead-free requirements, and thermal performance relies on proper soldering and via placement connecting the PowerPad to the PCB ground plane.
Can the TPS53316RGTT operate with only ceramic output capacitors?
Yes, the TPS53316RGTT is explicitly designed to support "all MLCC output capacitor" configurations. The datasheet confirms stable operation with two 22-µF ceramic capacitors, eliminating the need for bulk electrolytic or tantalum capacitors and improving reliability and temperature stability.
TPS53316RGTT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SmoothPWM™, Eco-Mode™
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 4.8V
- Current - Output:
- 5A
- Frequency - Switching:
- 725kHz, 1.1Mhz, 1.8MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VQFN (3x3)
TPS53316RGTT FAQ
1.How can I place an order for TPS53316RGTT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS53316RGTT 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 TPS53316RGTT reliable?
The price and inventory of TPS53316RGTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS53316RGTT is usually 5 days.
3.What payment methods are accepted for TPS53316RGTT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS53316RGTT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS53316RGTT?
TPS53316RGTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS53316RGTT 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 TPS53316RGTT?
For technical support, including TPS53316RGTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS53316RGTT requirements.
6.How does Aetrix verify that TPS53316RGTT is sourced from the original manufacturer or authorized distributors?
All TPS53316RGTT 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 TPS53316RGTT meets industry standards.
7.What is the process for return or replacement of TPS53316RGTT?
All TPS53316RGTT units undergo pre-shipment inspection (PSI). If there is an issue with TPS53316RGTT, 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 TPS53316RGTT part is unused and in its original packaging.
Return procedure for TPS53316RGTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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