My Inquiry
My Account
Texas Instruments TPS51317RGBR
- Part No.:
- TPS51317RGBR
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
TPS51317RGBR.pdf
- Description:
- IC REG BUCK ADJ 6A 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,483
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS51317RGBR from Texas Instruments is a fully integrated synchronous step-down DC/DC converter with D-CAP+™ adaptive on-time control, 6-A output capability, integrated high- and low-side FETs, and selectable switching frequencies up to 1.5 MHz. It regulates output voltages from 0.6 V to 2.0 V and supports 3.3-V or 5-V input rails in space-constrained point-of-load applications such as CPU core power delivery.
For engineers reviewing the TPS51317RGBR datasheet, TPS51317RGBR pinout, TPS51317RGBR application, or TPS51317RGBR equivalent, key selection considerations include its D-CAP+™ transient response, droop/non-droop configuration flexibility, 20-pin QFN package thermal performance, and compatibility with all-MLCC output stages without external compensation.
Technical Context
The TPS51317RGBR implements D-CAP+™ mode using current-sense feedback derived from the PGND–SW voltage during low-side FET conduction, combined with a single-ended VOUT feedback path for improved accuracy. Its adaptive on-time generator adjusts pulse width based on input/output voltage ratio and ripple amplitude to maintain stable frequency under load transients.
It supports three operational modes-SKIP (for light-load efficiency), Ripple Reduction (RR), and forced PWM-selected via resistor-programmed MODE pin thresholds. Protection includes valley overcurrent detection (7.6 A typical), ±9.3 A negative OCL, 145°C thermal shutdown with 10°C hysteresis, and 120% VREFIN OVP with latch-off behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 6 A continuous DC output current with integrated FETs - eliminates need for external power switches in compact POL designs. |
| Input Voltage Range | 3.3 V to 6.0 V - supports direct connection to standard 3.3-V and 5-V system rails without pre-regulation. |
| Output Voltage Range | 0.6 V to 2.0 V - programmable via REFIN pin, enabling precise core voltage regulation for modern processors. |
| Switching Frequency | Selectable 800 kHz / 1 MHz / 1.2 MHz / 1.5 MHz - allows trade-off between inductor size, efficiency, and EMI performance. |
| Package | 3.5 mm × 4 mm, 20-pin QFN (RGB) - RoHS-compliant, exposed thermal pad, θJCbot = 3.7°C/W for high-power density thermal management. |
| Control Architecture | D-CAP+™ adaptive on-time - delivers fast transient response (<10 µs recovery) without external loop compensation components. |
| Protection Features | OVP (120% VREFIN), UVP (68% VREFIN), thermal shutdown (145°C), and valley-current OCL (7.6 A) - ensures robust operation under fault conditions. |
Pinout & Package
TPS51317RGBR uses a 20-pin QFN package (RGB) with 0.5-mm pitch and exposed thermal pad. The package is RoHS-compliant, lead-free, and optimized for thermal dissipation (θJCbot = 3.7°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2,3,11,12,13,14,15 | PGND | Power ground return for low-side FET and current sensing - must be connected to solid PCB ground plane for stability and thermal performance. |
| 4 | VIN | Main input supply (3.3–6 V) - connects to high-side FET drain; requires local 10-µF ceramic decoupling. |
| 5 | VOUT | Output voltage monitor - provides feedback for regulation; connects directly to output rail for accurate sensing. |
| 6 | GND | Signal ground reference - separate from PGND; ties analog circuitry and COMP/VREF to clean reference. |
| 7 | VREF | 2.0-V precision reference output - supplies internal error amplifier; requires 0.22-µF ceramic capacitor to GND. |
| 8 | COMP | Compensation node - connects R-C network to VREF for loop stability in non-droop configurations. |
| 9 | REFIN | Reference input (0.6–2.0 V) - sets regulated output voltage; accepts tracking or divider-based inputs. |
| 10 | EN | Enable input (3.3-V logic compatible) - active-high; controls soft-start initiation and full device shutdown. |
| 16 | BST | Bootstrap supply - connects 0.1-µF capacitor to SW to drive high-side gate; critical for proper FET turn-on. |
| 17 | EN | Enable input (duplicate pin for layout flexibility) - electrically identical to Pin 10. |
| 18 | MODE | Frequency/light-load mode selection - resistor-programmed to choose among 8 predefined settings (SKIP/RR/PWM). |
| 19 | PGOOD | Open-drain power-good indicator - asserts after soft-start completes and VOUT reaches 95%; requires external pull-up. |
| 20 | V5IN | 5-V analog supply - powers internal bias circuits and gate drivers; has independent UVLO (4.37 V nominal). |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP+™ adaptive on-time control | Eliminates need for external compensation while delivering <10 µs transient response and stable operation with all-MLCC outputs. |
| Configurable droop/non-droop operation | Supports Intel-compatible voltage positioning (droop) or flat-load-regulation (non-droop) via COMP–VREF RC network selection. |
| Auto-SKIP and Ripple Reduction modes | Reduces light-load switching losses and output ripple simultaneously - improves efficiency at <100 mA without sacrificing noise performance. |
| Integrated bootstrap switch and driver | On-chip BST switch with 10-Ω RDS(on) enables reliable high-side FET gate drive without discrete charge pump or diode. |
| Comprehensive protection suite | Includes valley OCL, negative OCL, OVP/UVP, thermal shutdown, and 5-V UVLO - prevents damage during startup, overload, or thermal stress. |
| Small 3.5 mm × 4 mm QFN package | Enables high-density POL placement near processor cores while maintaining θJCbot = 3.7°C/W for 6-A operation. |
Applications
| Intel CPU Core Power | DDR Memory I/O Supply |
|---|---|
Use Scenario: Regulating VCORE for Intel Core i3/i5/i7 processors requiring tight DC accuracy and fast transient response under dynamic load changes. IC Role / Device Role / Timing Role: Primary synchronous buck controller providing 1.0–1.5 V at up to 6 A with droop configuration per Intel VR12.5/VR13 specs. Use Value: Achieves <±1% VOUT accuracy across load and temperature, with <10 µs recovery from 0→3 A step load using 6×22 µF MLCC output capacitors. |
Use Scenario: Generating 1.2-V or 1.35-V DDR3/DDR4 termination and I/O supply in laptops and embedded systems with strict ripple limits. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator supporting auto-SKIP mode to maintain >85% efficiency at 50 mA while meeting JEDEC ripple requirements. Use Value: Delivers <10 mVpp output ripple at full load using only ceramic capacitors, eliminating POSCAP/SP capacitors and reducing BOM cost. |
| ASIC/FPGA Core Rail | Industrial PLC I/O Module |
Use Scenario: Powering FPGA core logic (e.g., Xilinx Artix-7 or Intel Cyclone V) with dynamically varying current demand from 0.1 A to 5 A. IC Role / Device Role / Timing Role: Adaptive on-time buck converter configured in non-droop mode to maintain flat load regulation and minimize voltage deviation during DVFS transitions. Use Value: Maintains ±0.5% VOUT tolerance from no-load to full-load, enabling reliable operation of sub-1 V FPGA cores without external DAC or sequencing ICs. |
Use Scenario: Providing isolated 1.8-V or 2.5-V logic supply in industrial programmable logic controllers where long-term reliability and thermal margin are critical. IC Role / Device Role / Timing Role: Robust DC/DC converter operating from 5-V backplane with thermal shutdown (145°C) and latch-off protection against sustained overloads. Use Value: Sustains 6-A output continuously at 85°C ambient using standard 2-layer PCB with thermal vias to inner ground plane - validated per JEDEC JESD51-7. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS51315RGTR | Same D-CAP+™ architecture and 20-pin QFN package, but rated for 3-A output and lacks V5IN pin - uses single VIN for analog/digital supply. | Suitable for lower-current applications (≤3 A); not drop-in due to missing V5IN UVLO and reduced current capability. | Select TPS51315RGTR only when system-level 5-V rail is unavailable or when design budget constraints require lower-cost, lower-current solution. |
| MP2315DJ-LF-Z | Monolithic 6-A buck with constant-on-time control (not D-CAP+™), 17-pin QFN, no V5IN or MODE pin - fixed 500 kHz fSW, no droop support. | Lacks frequency selection, tracking, and droop features; simpler interface but inferior transient response and less flexible configuration. | Choose MP2315DJ-LF-Z for cost-sensitive, non-critical applications where fast transient response and Intel compliance are not required. |
Compared with TPS51317RGBR, TPS51315RGTR offers reduced integration and current rating, while MP2315DJ-LF-Z sacrifices configurability and transient performance for lower unit cost and simpler layout - neither matches the full feature set of the TPS51317RGBR for high-performance CPU core power.
Availability
TPS51317RGBR is available at Aetrix Electronics and suitable for Intel CPU core power, DDR memory I/O supply, ASIC/FPGA core rail, and industrial PLC I/O module applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS51317RGBR 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 and processor power delivery.
The TPS51317RGBR belongs to TI's D-CAP+™ synchronous buck converter product line, designed specifically for high-transient, space-constrained point-of-load applications in computing, communications, and industrial systems where fast response, small footprint, and robust protection are essential.
FAQ
What is the maximum continuous output current supported by the TPS51317RGBR?
The TPS51317RGBR supports up to 6 A of continuous DC output current with integrated high- and low-side FETs. This rating assumes proper PCB thermal design - including use of the exposed thermal pad, ≥6 thermal vias to inner ground planes, and adequate copper area - and operation within the –40°C to 85°C ambient temperature range specified in the datasheet.
Does the TPS51317RGBR require external compensation components?
The TPS51317RGBR does not require external compensation components in basic D-CAP+™ operation, as its adaptive on-time architecture provides inherent stability with all-MLCC output capacitors. However, for non-droop configurations requiring ultra-tight DC regulation, a resistor-capacitor network between COMP and VREF pins is used to implement Type II compensation - this is optional and application-dependent, not mandatory for functionality.
How is switching frequency selected on the TPS51317RGBR?
Switching frequency on the TPS51317RGBR is selected by applying a specific resistance between the MODE pin and GND, which sets one of eight predefined configurations (e.g., 0 kΩ = 860 kHz SKIP, 12 kΩ = 1.2 MHz SKIP). Table 4 in the SLUSAH9 datasheet defines exact resistor values and corresponding fSW/light-load mode combinations - no external clock signal or register programming is needed.
Can the TPS51317RGBR operate with only a 3.3-V input supply?
Yes, the TPS51317RGBR supports input voltages from 3.3 V to 6.0 V, making it fully compatible with 3.3-V system rails. When operating from 3.3 V, the device maintains full 6-A output capability down to 0.6 V, though minimum output voltage and efficiency will vary with input-output differential - refer to Figure 13 (efficiency vs. load at VIN = 3.3 V) in the datasheet for performance validation.
What protection features are built into the TPS51317RGBR?
The TPS51317RGBR integrates valley overcurrent protection (7.6 A typical), negative overcurrent detection (–9.3 A), output overvoltage (120% VREFIN), undervoltage (68% VREFIN), 5-V input UVLO (4.37 V), and thermal shutdown (145°C with 10°C hysteresis). All protections trigger latch-off behavior except PGOOD deassertion, which occurs immediately upon fault detection.
TPS51317RGBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP+™
- Package/Case:
- 20-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):
- 4.5V
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 2V
- Current - Output:
- 6A
- Frequency - Switching:
- 800kHz, 1MHz, 1.2MHz, 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VQFN (3.5x4)
TPS51317RGBR FAQ
1.How can I place an order for TPS51317RGBR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS51317RGBR 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 TPS51317RGBR reliable?
The price and inventory of TPS51317RGBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS51317RGBR is usually 5 days.
3.What payment methods are accepted for TPS51317RGBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS51317RGBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS51317RGBR?
TPS51317RGBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS51317RGBR 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 TPS51317RGBR?
For technical support, including TPS51317RGBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS51317RGBR requirements.
6.How does Aetrix verify that TPS51317RGBR is sourced from the original manufacturer or authorized distributors?
All TPS51317RGBR 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 TPS51317RGBR meets industry standards.
7.What is the process for return or replacement of TPS51317RGBR?
All TPS51317RGBR units undergo pre-shipment inspection (PSI). If there is an issue with TPS51317RGBR, 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 TPS51317RGBR part is unused and in its original packaging.
Return procedure for TPS51317RGBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS51317RGBR 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…
