My Inquiry
My Account
Texas Instruments TPS54313PWPRG4
- Part No.:
- TPS54313PWPRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54313PWPRG4.pdf
- Description:
- IC REG BUCK 1.5V 3A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,625
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS54313PWPRG4 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, 1.0% initial accuracy, and operation over 3-V to 6-V input range. It delivers point-of-load regulation for FPGA core supplies and DSP power rails in space-constrained industrial and telecom systems.
For engineers reviewing the TPS54313PWPRG4 datasheet, TPS54313PWPRG4 pinout, TPS54313PWPRG4 application, or TPS54313PWPRG4 equivalent, key selection criteria include its HTSSOP-20 PowerPAD™ package thermal performance, internal compensation enabling minimal external components, adjustable switching frequency (280–700 kHz), and integrated powergood signaling for system sequencing.
Technical Context
The TPS54313PWPRG4 implements a voltage-mode PWM control architecture with an internally compensated error amplifier (26 dB open-loop gain, 3–5 MHz unity-gain bandwidth) and adaptive dead-time logic to prevent shoot-through. Its oscillator supports dual fixed frequencies (350/550 kHz) via FSEL or externally programmable frequency (280–700 kHz) using RT-to-AGND resistor.
It integrates undervoltage lockout (UVLO start at 2.95 V, 0.16-V hysteresis), thermal shutdown (trip at 150°C, 10°C hysteresis), cycle-by-cycle current limiting (6.7 A typical limit), and a dedicated PWRGD open-drain output that 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 core rails. |
| Input Voltage Range | 3 V to 6 V - compatible with 3.3-V and 5-V intermediate bus architectures without pre-regulation. |
| Continuous Output Current | 3 A - supports mid-power FPGA I/O banks and microcontroller cores without external heatsinking. |
| Switching Frequency | Adjustable 280–700 kHz (via RT resistor) or fixed 350/550 kHz (via FSEL) - balances efficiency vs. size for 4.7–10 µH inductors. |
| Efficiency | Up to 94% at 3 A, VIN = 5 V, VOUT = 1.5 V - reduces thermal load in dense PCB layouts. |
| Thermal Resistance | RθJA = 26.0°C/W (with PowerPAD soldered) - allows >2 W dissipation at TA = 70°C in standard 2-layer board. |
| Protection Features | UVLO, thermal shutdown, cycle-by-cycle current limit, and powergood monitoring - eliminates need for discrete fault management circuitry. |
Pinout & Package
TPS54313PWPRG4 uses a thermally enhanced 20-pin HTSSOP (PWP) package with exposed PowerPAD™ for low-junction-to-board thermal resistance. The PowerPAD must be soldered to AGND plane for rated thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return for feedback divider, SS capacitor, VBIAS bypass, and RT/FSEL resistors - requires low-impedance connection to PowerPAD. |
| VSENSE (Pin 2) | Error amplifier inverting input | Direct connection to output voltage sense point - determines regulation accuracy and transient response stability. |
| NC (Pin 3) | No internal connection | Unbonded pad - must remain unconnected and not tied to any net. |
| PWRGD (Pin 4) | Open-drain powergood output | Pulled low if VSENSE < 90% Vref, UVLO active, or SS/ENA low - used for processor reset or supply sequencing. |
| BOOT (Pin 5) | Bootstrap supply for high-side driver | Connects 0.022–0.1-µF ceramic capacitor to PH - enables floating gate drive for integrated high-side MOSFET. |
| PH (Pins 6–10) | Phase node | Junction of internal MOSFETs and output inductor - high di/dt node requiring short, wide copper routing. |
| RT (Pin 20) | Frequency setting resistor input | Resistor to AGND sets switching frequency from 280–700 kHz - enables optimization for EMI or inductor size. |
| SS/ENA (Pin 18) | Slow-start/enable control | Logic-high (>1.2 V) enables device; external capacitor extends soft-start time - prevents inrush current on power-up. |
| VBIAS (Pin 17) | Bias regulator output | Supplies 2.7–2.9 V to internal circuitry; requires 0.1–1.0-µF X7R/X5R ceramic bypass to AGND - critical for stability. |
| VIN (Pins 14–16) | Main input supply | 3–6 V input for power switches and bias regulator - each pin must be individually bypassed to PGND with 1–10 µF ceramic. |
| PGND (Pins 11–13) | Power ground return | High-current return for low-side MOSFET and input/output capacitors - must connect directly to PowerPAD with multiple vias. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60-mΩ MOSFETs | Enables 3-A continuous output with no external power switches - reduces BOM count and layout area by >30% vs. controller-only solutions. |
| Internally compensated control loop | Eliminates need for external compensation network - supports stable operation with standard 4.7–10 µH inductors and ceramic output caps. |
| Fast transient response | 10–20 µs recovery time under step load changes - maintains <±3% output deviation for FPGA core current bursts. |
| Adjustable switching frequency | 280–700 kHz range via RT resistor - allows EMI spread-spectrum tuning or inductor size reduction without changing IC. |
| PowerPAD™ thermal package | 26.0°C/W junction-to-ambient (soldered) - sustains full 3-A load at 70°C ambient without heatsink on 2-layer board. |
Applications
| FPGA Core Supply | DSP I/O Rail Regulation |
|---|---|
|
Use Scenario: Powering 1.5-V core logic of Xilinx Spartan-7 or Intel MAX 10 FPGAs in industrial PLCs. IC Role / Device Role / Timing Role: Primary DC-DC regulator delivering tightly regulated 1.5-V at up to 3 A with fast load-step response. Use Value: Maintains FPGA configuration integrity during burst-mode processing; PWRGD signal sequences configuration after power-up. |
Use Scenario: Generating clean 1.5-V I/O supply for TI C66x DSPs in wireless baseband units. IC Role / Device Role / Timing Role: Point-of-load converter placed adjacent to DSP package to minimize IR drop and noise coupling. Use Value: Internal compensation and low-noise VBIAS enable <10 mVpp ripple - meets JESD204B SerDes power requirements. |
| Optical Transceiver Bias | Industrial Sensor Node MCU Supply |
|
Use Scenario: Providing stable 1.5-V bias for laser driver ICs in SFP+ optical modules. IC Role / Device Role / Timing Role: Secondary regulator fed from 3.3-V intermediate bus, delivering low-noise, sequenced power. Use Value: UVLO and thermal shutdown protect against fiber disconnect faults; adjustable frequency avoids 125-MHz data clock harmonics. |
Use Scenario: Powering ARM Cortex-M4 MCUs in battery-backed industrial sensor nodes with 3.3-V input rails. IC Role / Device Role / Timing Role: Efficient step-down converter operating across full 3–6 V input range during brownout conditions. Use Value: 94% peak efficiency at 3 A extends battery life; SS/ENA pin enables controlled wake-up from deep sleep mode. |
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, RoHS-compliant lead-free finish (G4 suffix denotes green packaging); identical electrical specs and pinout. | No functional difference - suitable for legacy designs requiring same reliability qualification but updated environmental compliance. | Select TPS54313PWPRG4 for new designs requiring JEDEC J-STD-609A Class 3 moisture sensitivity and halogen-free materials. |
| MP2315DJ-LF-Z | Monolithic 3-A buck with 1.5-V fixed output, but 4.5–24-V input range, higher quiescent current (250 µA), and no PWRGD or RT adjustability. | Used where wider input range is needed (e.g., 12-V industrial bus), but lacks sequencing and frequency tuning for noise-sensitive apps. | Choose MP2315DJ-LF-Z only if input exceeds 6 V; otherwise TPS54313PWPRG4 provides superior thermal performance and system integration. |
Compared with TPS54313PWPR and MP2315DJ-LF-Z, the TPS54313PWPRG4 uniquely combines 3-V min input, PowerPAD thermal design, programmable frequency, and powergood signaling - making it optimal for compact, noise-aware 3.3/5-V bus systems.
Availability
TPS54313PWPRG4 is available at Aetrix Electronics and suitable for FPGA core supplies, DSP I/O rails, and optical transceiver bias circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54313PWPRG4 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 and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The TPS5431x family was engineered for high-density, low-voltage point-of-load conversion in networking, telecom, and industrial equipment - emphasizing integration, thermal efficiency, and system-level reliability.
FAQ
What is the recommended input capacitor configuration for TPS54313PWPRG4?
TPS54313PWPRG4 requires individual 1–10 µF low-ESR ceramic capacitors connected from each VIN pin (14–16) directly to PGND pins (11–13), placed as close as possible to the package. A bulk electrolytic or polymer capacitor (≥22 µF) should supplement these near the input connector. This minimizes high-frequency switching noise and ensures stable UVLO operation.
Does TPS54313PWPRG4 support external synchronization?
No, TPS54313PWPRG4 does not support external clock synchronization. It offers only internal fixed frequencies (350/550 kHz via FSEL) or resistor-programmed frequency (280–700 kHz via RT). For sync capability, consider the TPS54318 or TPS544B20, which include a dedicated SYNC pin.
How is the slow-start time determined for TPS54313PWPRG4?
The internal slow-start time for TPS54313PWPRG4 is fixed at 5.6 ms (per Table 1 in SLVS416C), ramping the reference from 0 V to 0.891 V. An external capacitor on SS/ENA extends this time linearly - e.g., a 100-nF capacitor adds ~5.6 ms delay before ramp initiation, resulting in total start-up >11 ms. The TPS54313PWPRG4 datasheet provides exact calculation formulas in Section 7.3.2.
Can TPS54313PWPRG4 operate with input voltage below 3 V?
No. TPS54313PWPRG4 incorporates undervoltage lockout (UVLO) that disables operation until VIN reaches 2.95 V (typical start threshold). Below this, the device remains in shutdown with zero output. Operation below 3 V violates Recommended Operating Conditions and risks unstable regulation or undefined behavior.
What is the maximum allowable junction temperature for continuous operation of TPS54313PWPRG4?
The absolute maximum junction temperature for TPS54313PWPRG4 is 125°C per Recommended Operating Conditions. Thermal shutdown activates at 150°C (typical trip point), but sustained operation above 125°C risks accelerated parametric drift and reduced lifetime. Derating is required above 70°C ambient when operating at full 3-A load.
TPS54313PWPRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
TPS54313PWPRG4 FAQ
1.How can I place an order for TPS54313PWPRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54313PWPRG4 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 TPS54313PWPRG4 reliable?
The price and inventory of TPS54313PWPRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54313PWPRG4 is usually 5 days.
3.What payment methods are accepted for TPS54313PWPRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54313PWPRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54313PWPRG4?
TPS54313PWPRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54313PWPRG4 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 TPS54313PWPRG4?
For technical support, including TPS54313PWPRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54313PWPRG4 requirements.
6.How does Aetrix verify that TPS54313PWPRG4 is sourced from the original manufacturer or authorized distributors?
All TPS54313PWPRG4 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 TPS54313PWPRG4 meets industry standards.
7.What is the process for return or replacement of TPS54313PWPRG4?
All TPS54313PWPRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54313PWPRG4, 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 TPS54313PWPRG4 part is unused and in its original packaging.
Return procedure for TPS54313PWPRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS54313PWPRG4 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…
