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Texas Instruments TPS53315RGFT
- Part No.:
- TPS53315RGFT
- Manufacturer:
- Texas Instruments
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
TPS53315RGFT.pdf
- Description:
- IC REG BUCK ADJ 12A 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:743
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Product details
Overview
TPS53315RGFT from Texas Instruments is a 12-A synchronous step-down DC-DC regulator with integrated high-side (19 mΩ) and low-side (7 mΩ) MOSFETs, D-CAP™ control architecture, 0.6 V ±0.5% reference, and support for all-ceramic output capacitors. It delivers regulated output voltages from 0.6 V to 5.5 V across a 3 V–15 V conversion input range, targeting point-of-load power delivery in CPU/GPU core rails.
For engineers reviewing the TPS53315RGFT datasheet, TPS53315RGFT pinout, TPS53315RGFT application, or TPS53315RGFT equivalent, this page provides verified functional context, validated pin roles, confirmed thermal and protection behavior, and real-world selection guidance for server, notebook, and telecom power systems.
Technical Context
The TPS53315RGFT implements adaptive on-time D-CAP™ control-no external compensation required-using output capacitor ESR for current sensing and a programmable ramp-compensated PWM comparator. Its switching frequency is selectable across eight values (250 kHz–1 MHz) via resistor on RF pin, and soft-start time (0.7–5.6 ms) is set by MODE pin resistor.
It integrates a 5-V/30-mA LDO (VREG), open-drain PGOOD with 1-ms delay and ±5% window, thermal shutdown at 145°C, and cycle-by-cycle overcurrent protection with temperature-compensated TRIP pin (10 µA ±0.6 µA, 4700 ppm/°C). The device operates in auto-skip Eco-mode or forced CCM based on MODE pin configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 12 A continuous; enables single-chip core rail supply for mid-tier CPUs/GPUs without external MOSFETs. |
| Input Voltage Range | 3 V–15 V conversion input; supports wide-input intermediate bus architectures including 5 V, 12 V, and 3.3 V rails. |
| Output Voltage Range | 0.6 V–5.5 V; covers DDR memory, SoC cores, FPGA I/O, and ASIC logic rails with 1% initial accuracy. |
| Reference Voltage | 0.600 V ±0.5% over –40°C to 85°C; ensures tight regulation stability for sub-1 V digital loads. |
| Switching Frequency | Selectable 250 kHz–1 MHz via RF pin resistor; balances efficiency, size, and transient response for board-level optimization. |
| Shutdown Current | <10 µA; enables ultra-low-power system standby without compromising fast wake-up capability. |
| Thermal Resistance | RθJA = 35.8°C/W (VQFN-40); requires minimal copper area for 12-A operation at full load in 85°C ambient. |
Pinout & Package
TPS53315RGFT is housed in a thermally enhanced 40-pin VQFN package (7.0 mm × 5.0 mm) with exposed thermal pad. Pin numbering follows standard top-view orientation per TI SLUSAE6B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (36) | Enable input | Active-high logic control; 1.8 V threshold enables sequencing with 3.3 V or 5 V system rails. |
| VFB (37) | Feedback input | Connects to resistor divider from VOUT; senses output voltage against internal 0.6 V reference. |
| PGOOD (32) | Open-drain status flag | Asserts after 1-ms delay when VOUT is within ±5% of target; requires external pull-up for system monitoring. |
| RF (38) | Frequency select input | Resistor to GND or VREG sets one of eight discrete switching frequencies (250 kHz–1 MHz). |
| MODE (39) | Soft-start & mode control | Resistor value selects soft-start time (0.7–5.6 ms) and configures auto-skip or forced CCM operation. |
| TRIP (35) | OCP threshold setting | Sources 10 µA (±0.6 µA) with 4700 ppm/°C tempco; sets valley current limit via external resistor. |
| VBST (30) | Bootstrap supply | Connects to LL node via capacitor; powers high-side gate driver; internally tied to VREG through bootstrap switch. |
| VREG (3) | 5-V LDO output | Supplies 30 mA at 4.77–5.35 V; powers VBST and external bias circuits; enables self-contained startup. |
| VIN (11–15, 20–21) | Main power input | Eight parallel pins reduce IR drop and thermal stress for 12-A input current path. |
| PGND (2, 5–10, 22–28) | Power ground | Twelve dedicated pins minimize ground loop inductance and improve current-sense accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP™ adaptive on-time control | Eliminates external compensation components; achieves ultra-fast transient response using ceramic capacitor ESR as current sense element. |
| All-ceramic capacitor support | Validated with low-ESR MLCCs; reduces solution size and cost versus polymer/tantalum alternatives while maintaining stability. |
| Integrated 5-V/30-mA LDO (VREG) | Provides local bias for bootstrap circuit and external logic; removes need for separate LDO in compact designs. |
| Adjustable overcurrent limit | TRIP pin enables precise, temperature-compensated OCP tuning (140–160 mV trip) without adding sense resistors. |
| Pre-charged start-up capability | Allows safe startup into pre-biased outputs-critical for hot-swap and multi-rail sequencing applications. |
Applications
| Server CPU Core Rail | Notebook GPU Power |
|---|---|
|
Use Scenario: Regulating 0.85 V @ 10 A for dual-core X86 processor under dynamic load steps up to 6 A/µs. IC Role / Device Role / Timing Role: Primary synchronous buck controller with D-CAP™ architecture delivering sub-100 ns transient recovery and no external compensation. Use Value: Enables single-chip 12-A solution with <1% output deviation during load transients, reducing BOM count and PCB area vs discrete controller + MOSFET designs. |
Use Scenario: Supplying 1.05 V @ 8 A to mobile GPU in thin-and-light notebook with strict thermal envelope (≤65°C ambient). IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator operating in auto-skip Eco-mode below 1 A to extend battery life. Use Value: Achieves >92% efficiency at 100 mA load and >95% at 5 A, directly lowering system power dissipation and thermal management complexity. |
| Telecom Baseband Processor | Industrial FPGA I/O Bank |
|
Use Scenario: Delivering 1.2 V @ 6 A to LTE baseband SoC with stringent ripple (<10 mVpp) and EMI requirements. IC Role / Device Role / Timing Role: Fixed-frequency (500 kHz) buck converter with adjustable soft-start (2.8 ms) for controlled power-up sequencing. Use Value: Meets EN55022 Class B conducted EMI limits without additional filtering due to clean D-CAP™ waveform and integrated MOSFET shielding. |
Use Scenario: Powering 3.3 V I/O banks on Xilinx Artix-7 FPGA in factory automation controller with 24/7 operation. IC Role / Device Role / Timing Role: Forced CCM mode regulator with 300 kHz switching for predictable EMI profile and stable timing margin. Use Value: Delivers 96% peak efficiency and 145°C thermal shutdown with hiccup recovery-ensuring long-term reliability in unventilated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS53318RGFT | Same 40-pin VQFN package and D-CAP™ architecture but rated for 15-A output; higher RDS(on) MOSFETs (15 mΩ/6 mΩ) and 1.5× larger thermal pad area. | Supports higher-current SoC rails (e.g., server APUs); requires revised layout for increased thermal mass and current handling. | Choose TPS53318RGFT only if >12 A peak current or extended thermal margin is required; otherwise TPS53315RGFT offers better cost/performance fit. |
| ISL95831IRZ | Intersil (Renesas) 12-A buck with similar input/output ranges but uses voltage-mode control with external compensation; no integrated LDO. | Requires external 5-V bias and compensation network; less suited for space-constrained designs but offers greater loop tuning flexibility. | Prefer ISL95831IRZ when design demands custom loop shaping or compatibility with legacy Renesas ecosystem; TPS53315RGFT simplifies layout and reduces component count. |
Compared with TPS53315RGFT, TPS53318RGFT provides headroom for future current scaling but increases cost and thermal footprint, while ISL95831IRZ trades integration for control flexibility-making TPS53315RGFT optimal for cost-sensitive, space-constrained, high-volume computing power rails.
Availability
TPS53315RGFT is available at Aetrix Electronics and suitable for server motherboard development, notebook power subsystems, and telecom base station power modules requiring stable component supply, consistent parametric performance, and long-term industrial temperature support (–40°C to 85°C).
Supply support for TPS53315RGFT 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 decades of expertise in high-efficiency DC-DC conversion and computing power solutions.
The TPS533xx family was designed specifically for high-current, low-voltage point-of-load regulation in servers, notebooks, and telecom infrastructure-emphasizing integration, transient performance, and thermal robustness without external compensation.
FAQ
What is the maximum supported input voltage for TPS53315RGFT?
The TPS53315RGFT supports a conversion input voltage range of 3 V to 15 V on the VIN pins. Its VDD supply input accepts 4.5 V to 25 V, enabling independent biasing from auxiliary rails. Absolute maximum VIN is 17 V, but sustained operation above 15 V violates recommended conditions and risks reliability degradation.
Does TPS53315RGFT require external compensation components?
No, the TPS53315RGFT uses D-CAP™ control architecture that senses output capacitor ESR for current feedback, eliminating the need for external compensation networks. This reduces BOM count and simplifies layout-verified in TI's SLUSAE6B datasheet Section 6.3.2 and Figure 6-3 small-signal model.
How is overcurrent protection configured on TPS53315RGFT?
Overcurrent protection on TPS53315RGFT is set via the TRIP pin, which sources a temperature-compensated 10 µA current (±0.6 µA, 4700 ppm/°C). Connecting an external resistor between TRIP and GND establishes the OCL trip voltage (VOCL = VTRIP/8), with typical VOCL ranging from 140 mV to 160 mV depending on resistor value.
Can TPS53315RGFT operate with pre-biased outputs?
Yes, TPS53315RGFT supports pre-charged start-up, allowing safe turn-on into an already biased output rail. This feature prevents reverse current flow and ensures controlled soft-start even when VOUT is non-zero at enable-critical for hot-swap and multi-rail sequencing applications as documented in Section 7.1 of SLUSAE6B.
What is the purpose of the VREG pin on TPS53315RGFT?
The VREG pin on TPS53315RGFT is a 5-V, 30-mA integrated LDO output used to power the internal bootstrap circuit (VBST) and optionally supply external bias rails. It eliminates the need for an external LDO in many designs and remains low during shutdown-enabling reliable PGOOD pull-up and preventing false power-good assertions.
TPS53315RGFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP™, Eco-Mode™
- Package/Case:
- 40-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):
- 3V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 12A
- Frequency - Switching:
- 250kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VQFN (7x5)
TPS53315RGFT FAQ
1.How can I place an order for TPS53315RGFT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS53315RGFT 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 TPS53315RGFT reliable?
The price and inventory of TPS53315RGFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS53315RGFT is usually 5 days.
3.What payment methods are accepted for TPS53315RGFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS53315RGFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS53315RGFT?
TPS53315RGFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS53315RGFT 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 TPS53315RGFT?
For technical support, including TPS53315RGFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS53315RGFT requirements.
6.How does Aetrix verify that TPS53315RGFT is sourced from the original manufacturer or authorized distributors?
All TPS53315RGFT 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 TPS53315RGFT meets industry standards.
7.What is the process for return or replacement of TPS53315RGFT?
All TPS53315RGFT units undergo pre-shipment inspection (PSI). If there is an issue with TPS53315RGFT, 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 TPS53315RGFT part is unused and in its original packaging.
Return procedure for TPS53315RGFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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