My Inquiry
My Account
Texas Instruments TPS53315RGFR
- Part No.:
- TPS53315RGFR
- Manufacturer:
- Texas Instruments
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
TPS53315RGFR.pdf
- Description:
- IC REG BUCK ADJ 12A 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,812
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS53315RGFR 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 accuracy, 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 TPS53315RGFR datasheet, TPS53315RGFR pinout, TPS53315RGFR application, or TPS53315RGFR equivalent, this device offers selectable 250 kHz–1 MHz switching frequency, auto-skip Eco-mode for light-load efficiency, 0.7–5.6 ms programmable soft-start, integrated 5-V LDO (30 mA), and open-drain PGOOD with 1-ms delay - critical for server, notebook, and telecom power sequencing.
Technical Context
The TPS53315RGFR implements D-CAP™ adaptive on-time control without external compensation, using output capacitor ESR for current sensing and enabling ultra-fast transient response. Its control loop integrates ramp compensation to reduce jitter and adaptive zero-crossing detection to optimize light-load efficiency in discontinuous conduction mode.
It features dual supply domains: VIN (3–15 V) powers the power stage, while VDD (4.5–25 V) supplies the controller and integrated 5-V LDO. Protection includes cycle-by-cycle overcurrent (via TRIP pin with 10 µA tempco current source), OVP/UVP (±10%/±15% thresholds), thermal shutdown at 145°C, and UVLO on VREG (4.2 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 12 A continuous - supports high-current CPU/GPU core rails without external MOSFETs. |
| Input voltage (conversion) | 3 V to 15 V - compatible with 5 V, 12 V, and intermediate bus architectures. |
| Output voltage range | 0.6 V to 5.5 V - covers sub-1 V digital core, I/O, and auxiliary rails with 1% reference accuracy. |
| Switching frequency | 250 kHz to 1 MHz (8 preset values via RF pin resistor) - enables optimization of size, efficiency, and EMI. |
| Shutdown current | <10 µA - ensures minimal system standby power loss in battery-backed or always-on applications. |
| Soft-start time | 0.7 ms / 1.4 ms / 2.8 ms / 5.6 ms (selectable via MODE pin resistor) - prevents inrush current and enables precise power-rail sequencing. |
| Thermal resistance (RθJA) | 35.8 °C/W - validated for 40-pin VQFN (5 mm × 7 mm) package with exposed thermal pad, enabling 12-A operation at ≤85°C ambient. |
Pinout & Package
TPS53315RGFR is housed in a 40-pin VQFN package (RGF) measuring 5.0 mm × 7.0 mm with an exposed thermal pad for enhanced heat dissipation. The package is rated for operation from –40°C to +85°C ambient temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 36) | Enable input | Active-high logic control; 1.8 V threshold enables full operation; <0.6 V disables converter and reduces quiescent current to <10 µA. |
| VIN (Pins 11,12,13,14,15) | Main power input | High-current path for 3–15 V conversion input; multiple pins reduce trace resistance and improve thermal performance. |
| LL (Pin 16) | Power switch node | Connects to output inductor; serves as SW node for synchronous rectification and current sensing reference. |
| PGND (Pins 2,5,6,7,8,9,10) | Power ground | Dedicated low-impedance return path for high-frequency switching currents; isolated from controller GND to minimize noise coupling. |
| GND1 (Pin 1), GND2 (Pin 4) | Controller ground | Separate analog/digital ground references for feedback, logic, and gate drive circuits to maintain signal integrity. |
| VFB (Pin 37) | Feedback input | Monitors output voltage via resistor divider; compares against internal 0.6 V reference to regulate output within ±1%. |
| RF (Pin 38) | Frequency select | Resistor-to-GND or resistor-to-VREG sets one of eight switching frequencies (250 kHz–1 MHz); no external oscillator needed. |
| MODE (Pin 39) | Mode control | Selects auto-skip Eco-mode vs forced CCM and programs soft-start time (0.7–5.6 ms) via external resistor value. |
| TRIP (Pin 35) | OCP threshold | Sources 10 µA (4700 ppm/°C) current; sets valley current limit by resistor to GND; enables accurate RDS(on)-based sensing. |
| PGOOD (Pin 32) | Power-good flag | Open-drain output asserting high after 1-ms delay when VOUT is within ±5% of target; drops low within 2 µs if VOUT exceeds ±15%. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP™ adaptive on-time control | Eliminates need for external compensation components; uses ceramic capacitor ESR for current sensing and achieves <100 ns load-step response. |
| Integrated 5-V LDO (VREG) | Supplies 30 mA at 4.77–5.35 V with 295 mV dropout; powers external circuitry (e.g., memory termination, level shifters) without secondary regulator. |
| Pre-charged start-up capability | Allows safe startup into pre-biased outputs - prevents reverse current flow and protects downstream loads during hot-insertion or rail sequencing. |
| Adjustable overcurrent limit | TRIP pin sources precision 10 µA current with 4700 ppm/°C tempco; enables accurate, temperature-compensated current limiting using single resistor. |
| Support for all-ceramic output capacitors | Validated with low-ESR ceramic caps (no polymer/SP-CAP required); reduces solution size, cost, and improves reliability in space-constrained designs. |
Applications
| Server CPU Core Rail | Notebook GPU Power Delivery |
|---|---|
Use Scenario: Regulating 0.85 V @ 10 A for high-performance x86 CPU cores under dynamic 0–100% load steps. IC Role / Device Role / Timing Role: Primary synchronous buck controller with integrated FETs, D-CAP™ fast transient response, and PGOOD sequencing for BIOS initialization. Use Value: Achieves >94% peak efficiency at 12 V input, maintains ±1% output regulation during 5-A/µs load transients, and enables compact 2-layer PCB layout. |
Use Scenario: Supplying 1.05 V @ 8 A to discrete GPU in ultrabook platform with strict thermal and thickness constraints. IC Role / Device Role / Timing Role: Single-chip point-of-load regulator with programmable soft-start (1.4 ms) and Eco-mode for battery-life extension during idle graphics workloads. Use Value: Reduces light-load quiescent current to <10 µA, eliminates external compensation, and fits within 7 mm × 5 mm footprint including thermal pad. |
| Telecom Baseband Processor | Industrial FPGA I/O Bank |
Use Scenario: Delivering 1.8 V @ 6 A to multi-core baseband SoC in 5G small cell radio unit with -40°C to +85°C operating range. IC Role / Device Role / Timing Role: High-reliability buck converter with overtemperature shutdown (145°C), OVP/UVP protection, and robust ESD rating (±2 kV HBM). Use Value: Maintains stable regulation across wide input (5–12 V) and temperature range; supports seamless firmware updates via PGOOD-monitored power sequencing. |
Use Scenario: Powering 3.3 V I/O banks of Xilinx Artix-7 FPGA in programmable logic controller with mixed-signal noise sensitivity. IC Role / Device Role / Timing Role: Low-noise, forced-CCM mode regulator using MODE pin tie to PGOOD; minimizes switching frequency variation for deterministic timing margins. Use Value: Delivers <15 mV p-p output ripple at full load, isolates power-ground domains (PGND/GND1/GND2), and avoids audible coil whine in factory-floor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS53355RGFR | Higher 30-A rating, 3.5-V to 18-V input, dual-phase capable, no integrated LDO; requires external compensation. | Targets higher-power CPU VRMs requiring phase interleaving and tighter voltage tolerance (±0.5%). | Choose TPS53355RGFR when >12 A output or dual-phase scalability is required; avoid for space-constrained 12-A single-rail designs. |
| MP2315GJ-Z | 12-A rating, 4.5-V to 28-V input, fixed 500-kHz frequency, no soft-start programming, no LDO, lower thermal resistance (28 °C/W). | Optimized for industrial DC-input systems (24 V bus) where input voltage exceeds 15 V and LDO is unnecessary. | Choose MP2315GJ-Z for 24-V input applications needing lower RθJA; retain TPS53315RGFR for 5/12-V buses requiring programmable frequency, soft-start, and VREG. |
Compared with TPS53355RGFR and MP2315GJ-Z, the TPS53315RGFR uniquely combines 12-A capability with integrated 5-V LDO, four soft-start options, and D-CAP™ zero-compensation design - making it optimal for compute-oriented 3–15 V input systems where board area, component count, and sequencing flexibility are critical.
Availability
TPS53315RGFR is available at Aetrix Electronics and suitable for server motherboard development, notebook power subsystems, and telecom baseband processor designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS53315RGFR 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 TPS53315RGFR belongs to TI's D-CAP™ family of synchronous buck regulators, designed specifically for low-voltage, high-current point-of-load applications in servers, notebooks, and telecom infrastructure where fast transient response and minimal external components are essential.
FAQ
What is the maximum recommended output current for TPS53315RGFR in continuous operation?
The TPS53315RGFR is rated for 12 A continuous output current under recommended operating conditions (TA ≤ 85°C, proper PCB layout with thermal vias). This rating assumes use of the 40-pin VQFN package with exposed thermal pad, adequate copper area, and airflow per TI's thermal guidelines. Derating is required above 85°C ambient or with reduced copper area.
Does TPS53315RGFR require external compensation components?
No, the TPS53315RGFR uses D-CAP™ control architecture that senses output capacitor ESR for current feedback, eliminating the need for external compensation networks. This reduces bill-of-materials count and simplifies design - verified across all-ceramic capacitor configurations per TI's application notes and test data.
How is the switching frequency selected on TPS53315RGFR?
The TPS53315RGFR switching frequency is set by connecting a resistor between the RF pin (Pin 38) and either GND or VREG (Pin 3). Eight discrete frequencies from 250 kHz to 1 MHz are supported, with values defined in Table 6-1 of the datasheet. An open RF pin defaults to 500 kHz.
Can TPS53315RGFR start up into a pre-biased output voltage?
Yes, the TPS53315RGFR supports pre-charged start-up. When enabled, it prevents reverse current flow into the output capacitor during startup, protecting downstream loads and ensuring reliable operation in hot-swap or multi-rail sequencing scenarios - confirmed in Section 7.1 of the official datasheet.
What protection features are integrated into TPS53315RGFR?
The TPS53315RGFR integrates overcurrent protection (cycle-by-cycle via TRIP pin), overvoltage and undervoltage protection (±10%/±15% thresholds), thermal shutdown (145°C), VREG UVLO (4.2 V), and open-drain PGOOD with fast fault response (<2 µs). All protections are fully specified in Sections 5.5 and 6.3 of the datasheet.
TPS53315RGFR 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)
TPS53315RGFR FAQ
1.How can I place an order for TPS53315RGFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS53315RGFR 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 TPS53315RGFR reliable?
The price and inventory of TPS53315RGFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS53315RGFR is usually 5 days.
3.What payment methods are accepted for TPS53315RGFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS53315RGFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS53315RGFR?
TPS53315RGFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS53315RGFR 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 TPS53315RGFR?
For technical support, including TPS53315RGFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS53315RGFR requirements.
6.How does Aetrix verify that TPS53315RGFR is sourced from the original manufacturer or authorized distributors?
All TPS53315RGFR 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 TPS53315RGFR meets industry standards.
7.What is the process for return or replacement of TPS53315RGFR?
All TPS53315RGFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS53315RGFR, 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 TPS53315RGFR part is unused and in its original packaging.
Return procedure for TPS53315RGFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS53315RGFR Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
