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Texas Instruments TPS54313PWPG4
- Part No.:
- TPS54313PWPG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54313PWPG4.pdf
- Description:
- IC REG BUCK 1.5V 3A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS54313PWPG4 from Texas Instruments is a 3-A synchronous buck PWM converter with integrated 60-mΩ high- and low-side MOSFETs, fixed 1.5-V output voltage, 3-V to 6-V input range, and internal compensation for minimal external components. It delivers point-of-load regulation for FPGAs and microprocessors in space-constrained industrial and computing systems.
For engineers reviewing the TPS54313PWPG4 datasheet, TPS54313PWPG4 pinout, TPS54313PWPG4 application, or TPS54313PWPG4 equivalent, key selection criteria include its 1.5-V ±2.5% output accuracy over temperature and load, 350/550 kHz fixed-frequency operation (or 280–700 kHz adjustable), thermal shutdown at 150°C, powergood signaling, and HTSSOP-20 PowerPAD™ package for enhanced thermal performance.
Technical Context
The TPS54313PWPG4 implements a voltage-mode synchronous buck topology with an internally compensated error amplifier, adaptive dead-time control, and cycle-by-cycle peak current limiting. Its UVLO (2.95 V start / 2.8 V stop) and programmable slow-start (5.6 ms internal time) ensure controlled power-up sequencing.
It features dual-frequency selection via FSEL pin (350 kHz or 550 kHz), or externally adjustable switching frequency using RT resistor (280–700 kHz), and integrates a 2.8-V VBIAS regulator for internal circuitry with 100 µA output capability. The PWRGD open-drain output asserts low when VSENSE falls below 90% of 0.891-V reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2.5% over –40°C to 125°C, 0–3 A load, 3–6 V input - enables direct replacement of LDOs in 1.5-V logic rails. |
| Input Voltage Range | 3 V to 6 V - supports single-cell Li-ion, 3.3-V/5-V intermediate bus, and USB-powered systems. |
| Continuous Output Current | 3 A - sustains full-rated load without derating up to 85°C ambient with proper PCB copper area. |
| Switching Frequency | 350 kHz (FSEL ≤0.8 V) or 550 kHz (FSEL ≥2.5 V); adjustable 280–700 kHz via RT resistor - balances efficiency vs. size for EMI-sensitive designs. |
| Thermal Shutdown | 150°C trip point with 10°C hysteresis - protects against sustained overload or poor heatsinking in enclosed enclosures. |
| Powergood Threshold | VSENSE < 90% of 0.891 V → PWRGD pulled low - provides reliable reset signaling for DSPs/FPGAs during brownout. |
| Quiescent Current | 6.2–12.8 mA depending on frequency mode - impacts light-load efficiency in always-on subsystems. |
Pinout & Package
TPS54313PWPG4 uses a thermally enhanced 20-pin HTSSOP (PWP) package with exposed PowerPAD™ thermal pad soldered to AGND plane for low junction-to-board thermal resistance (26.0°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return for feedback divider, SS capacitor, VBIAS bypass, and RT/FSEL bias - must be isolated from PGND except at single-point PowerPAD™ connection. |
| VSENSE (Pin 2) | Error amplifier inverting input | Direct connection to output voltage sense point - determines regulation accuracy; sensitive to PCB trace inductance. |
| NC (Pin 3) | No internal connection | Unbonded die pad - must remain unconnected and unstubbed to avoid parasitic coupling. |
| PWRGD (Pin 4) | Open-drain powergood output | Asserts low when output is out-of-regulation, UVLO active, or SS/ENA disabled - requires external pull-up for processor reset interface. |
| BOOT (Pin 5) | Bootstrap supply for high-side driver | Connects 0.022–0.1 µF ceramic capacitor to PH - critical for gate drive integrity; capacitor must be low-ESR X7R/X5R. |
| PH (Pins 6–10) | Phase node (switching node) | Junction of internal MOSFETs and output inductor - high di/dt node requiring minimized loop area and tight layout to reduce EMI. |
| RT (Pin 20) | Frequency setting resistor input | Connect resistor to AGND to set 280–700 kHz frequency; floating for internal 350/550 kHz modes - defines timing accuracy and ripple trade-off. |
| SS/ENA (Pin 18) | Slow-start/enable control | Logic-high (>1.2 V) enables device; capacitor to AGND extends startup time - used for sequencing and inrush limiting. |
| VBIAS (Pin 17) | Bias regulator output | Supplies 2.7–2.9 V to internal circuits; bypass with 0.1–1.0 µF ceramic to AGND - also usable as external analog reference. |
| VIN (Pins 14–16) | Main input supply | 3–6 V input for power switches and bias regulator; each pin carries portion of input current - requires local 1–10 µF ceramic bypass to PGND. |
| PGND (Pins 11–13) | Power ground return | High-current return path for low-side FET and input/output capacitors - must connect to large copper pour and tie to PowerPAD™. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60-mΩ MOSFETs | Enables 3-A continuous output with no external power switches - reduces BOM count and layout complexity in compact DC/DC modules. |
| Internally compensated control loop | Eliminates need for external compensation network - simplifies design for standard 4.7–10 µH inductors and ceramic output capacitors. |
| Fast transient response (10–20 µs recovery) | Minimizes output voltage deviation during FPGA core current steps - maintains stable logic rail under dynamic load changes. |
| Powergood (PWRGD) with 35-µs deglitch | Provides noise-immune system reset signal synchronized to output regulation - essential for reliable boot sequencing in multi-rail systems. |
| Thermal shutdown with 10°C hysteresis | Prevents permanent damage during sustained overload while enabling automatic recovery after fault removal - improves field reliability. |
Applications
| FPGA Core Supply | DSP Point-of-Load Regulation |
|---|---|
Use Scenario: Powers 1.5-V I/O banks or auxiliary logic in Xilinx Artix-7 or Intel Cyclone V FPGAs during configuration and active operation. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated 1.5-V rail with fast transient response to handle I/O switching currents. Use Value: Maintains <±2.5% output accuracy across –40°C to 125°C junction temperature, ensuring setup/hold timing margins are preserved under thermal stress. |
Use Scenario: Supplies 1.5-V core voltage to TI C6000 DSPs in telecom baseband processing units with burst-mode workloads. IC Role / Device Role / Timing Role: High-efficiency step-down converter with PWRGD signaling for coordinated power-up with memory and interface ICs. Use Value: 5.6-ms internal slow-start prevents inrush current from tripping upstream 5-V bus fuses during cold start. |
| Industrial PLC I/O Module | Network Processor Auxiliary Rail |
Use Scenario: Generates 1.5-V supply for isolated CAN transceivers and ADC front-ends in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Robust DC/DC converter with UVLO (2.95 V) and thermal shutdown (150°C) for wide-input industrial 24-VDC systems with brownout risk. Use Value: HTSSOP-20 PowerPAD™ package achieves 26.0°C/W θJA with standard 2-layer PCB - eliminates need for heatsinks in convection-cooled enclosures. |
Use Scenario: Provides 1.5-V bias for SerDes PLLs and packet buffer interfaces in Broadcom BCM58xx network processors. IC Role / Device Role / Timing Role: Low-noise, high-PG accuracy regulator supporting jitter-sensitive clock generation circuitry. Use Value: 0.891-V internal reference trimmed to ±0.5% ensures <±2.5% total output tolerance - meets IEEE 802.3 compliance for PHY timing stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54313PWPR | Same silicon, tape-and-reel packaging (vs. tube for PWPG4); identical electrical specs and pinout. | No functional difference - selected for automated SMT assembly instead of manual/hand-solder prototyping. | Choose PWPR for volume production; PWPG4 for evaluation or low-volume builds requiring tube packaging. |
| MP2315DJ-LF-Z | Monolithic 3-A buck with 1.5-V fixed output but 4.5–26-V input range; no PWRGD or adjustable frequency; 12-pin QFN. | Suitable for higher-input industrial systems where 3–6 V range is insufficient; lacks sequencing and monitoring features. | Select MP2315 only if input exceeds 6 V or QFN footprint is required; not drop-in due to different pin count, package, and feature set. |
Compared with TPS54313PWPG4, the PWPR offers identical performance in tape-and-reel format for manufacturing scalability, while the MP2315DJ-LF-Z trades monitoring and flexibility for wider input range and smaller footprint - making it viable only in non-sequencing, high-input applications.
Availability
TPS54313PWPG4 is available at Aetrix Electronics and suitable for FPGA power delivery, DSP point-of-load regulation, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54313PWPG4 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 automotive-grade reliability.
The TPS5431x family was designed specifically for low-voltage, high-density point-of-load applications in computing, networking, and industrial systems - emphasizing integration, thermal robustness, and ease of use through internal compensation and PowerPAD™ packaging.
FAQ
What is the exact output voltage tolerance of the TPS54313PWPG4 over temperature and load?
The TPS54313PWPG4 delivers a fixed 1.5-V output with ±2.5% initial accuracy over –40°C to 125°C junction temperature and 0–3 A load, as specified in Section 6.5 of the SLVS416C datasheet. This tolerance includes line, load, and temperature effects - no external trimming is required to meet this spec.
Does the TPS54313PWPG4 support external frequency synchronization?
No, the TPS54313PWPG4 does not support external clock synchronization. It offers only three frequency modes: 350 kHz (FSEL ≤0.8 V), 550 kHz (FSEL ≥2.5 V), or adjustable 280–700 kHz via RT resistor. The SYNC pin is absent - this functionality is available only on other SWIFT™ devices like the TPS54310.
How is thermal performance affected if the PowerPAD™ is not soldered to AGND?
If the PowerPAD™ thermal pad on the TPS54313PWPG4 is left unsoldered, junction-to-ambient thermal resistance increases from 26.0°C/W to 57.5°C/W. This reduces maximum sustainable power dissipation by more than 55% at 70°C ambient - risking thermal shutdown under 3-A load without forced airflow or additional copper area.
Can the TPS54313PWPG4 sink current during light-load or transient conditions?
Yes, the TPS54313PWPG4 supports continuous current sinking during output voltage overshoot or rapid load reduction. Its synchronous architecture allows the low-side MOSFET to actively pull the output down, maintaining regulation even when sourcing current drops to zero - critical for FPGA I/O rail stability.
What is the minimum recommended output capacitance for stable operation of the TPS54313PWPG4?
The TPS54313PWPG4 requires ≥22 µF total ceramic output capacitance with ≤5 mΩ ESR for stable operation with internal compensation. Typical designs use two 10-µF X7R 0805 capacitors in parallel near the VOUT and PGND pins - lower ESR improves transient response and reduces output ripple below 10 mVpp.
TPS54313PWPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 350kHz, 550kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS54313PWPG4 FAQ
1.How can I place an order for TPS54313PWPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54313PWPG4 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 TPS54313PWPG4 reliable?
The price and inventory of TPS54313PWPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54313PWPG4 is usually 5 days.
3.What payment methods are accepted for TPS54313PWPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54313PWPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54313PWPG4?
TPS54313PWPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54313PWPG4 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 TPS54313PWPG4?
For technical support, including TPS54313PWPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54313PWPG4 requirements.
6.How does Aetrix verify that TPS54313PWPG4 is sourced from the original manufacturer or authorized distributors?
All TPS54313PWPG4 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 TPS54313PWPG4 meets industry standards.
7.What is the process for return or replacement of TPS54313PWPG4?
All TPS54313PWPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54313PWPG4, 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 TPS54313PWPG4 part is unused and in its original packaging.
Return procedure for TPS54313PWPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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