Texas Instruments TPS54310PWPG4

Overview

TPS54310PWPG4 from Texas Instruments is a 3-V to 6-V input, 3-A synchronous-buck PWM converter with integrated 60-mΩ high- and low-side MOSFETs, adjustable output down to 0.9 V (±1% reference accuracy), externally compensated control loop, and selectable switching frequency (350 kHz / 550 kHz fixed or 280–700 kHz adjustable). It delivers point-of-load regulation for FPGAs and microprocessors in space-constrained industrial and computing systems.

For engineers reviewing the TPS54310PWPG4 datasheet, TPS54310PWPG4 pinout, TPS54310PWPG4 application, or TPS54310PWPG4 equivalent, key selection considerations include its HTSSOP-20 PowerPAD™ thermal package, internal UVLO (2.95 V start), power-good open-drain output, slow-start/enable dual-function pin, and cycle-by-cycle current limiting with 200 ns response.

Technical Context

The TPS54310PWPG4 implements a voltage-mode synchronous buck architecture with a high-performance error amplifier (90–110 dB open-loop gain, 3–5 MHz unity-gain bandwidth) and externally configurable compensation. Its adaptive dead-time control prevents shoot-through by sequencing high- and low-side MOSFET gate drivers with 300-mA sink/source capability and bootstrap-driven high-side drive.

Switching frequency is selected via SYNC pin logic level (350 kHz at ≤0.8 V, 550 kHz at ≥2.5 V) or RT-to-AGND resistor (e.g., 100 kΩ sets ~500 kHz); external synchronization supports 330–700 kHz. Protection includes undervoltage lockout (2.95 V start, 2.8 V stop), thermal shutdown (150°C trip, 10°C hysteresis), and peak current limit (4.5–7.5 A depending on VIN).

Key Specifications

Pinout & Package

TPS54310PWPG4 uses a thermally enhanced 20-pin HTSSOP (PWP) PowerPAD™ package (6.40 mm × 6.30 mm) with exposed thermal pad soldered to AGND plane for optimal heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck regulator applications.

Compared with TPS54310PWPG4, TPS54312PWPR offers plug-and-play 1.2 V regulation but forfeits output adjustability, while LM2678SX-3.3/NOPB provides higher current and simpler layout at the cost of reduced feature set, thermal efficiency, and package density.

Availability

TPS54310PWPG4 is available at Aetrix Electronics and suitable for industrial embedded controllers, FPGA-based test equipment, and optical transceiver modules requiring stable component supply and long-term manufacturability.

Supply support for TPS54310PWPG4 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 designing analog and embedded processing chips for industrial, automotive, and communications markets.

The TPS543xx family delivers highly integrated, thermally optimized synchronous buck regulators targeting point-of-load applications in space- and efficiency-critical systems such as FPGAs, DSPs, and networking infrastructure.

FAQ

What is the recommended input capacitor configuration for TPS54310PWPG4?

TPS54310PWPG4 requires 1–10 µF low-ESR ceramic capacitors placed directly between each VIN pin (14–16) and adjacent PGND pins (11–13), with shortest possible trace length. Use X7R or X5R dielectrics; total effective capacitance should exceed 10 µF. The input capacitor bank must handle RMS ripple current and suppress high-frequency noise from the PH node.

Does TPS54310PWPG4 support forced continuous conduction mode (FCCM)?

No, TPS54310PWPG4 operates exclusively in continuous conduction mode (CCM) across its full 0–3 A load range. It does not include pulse-skipping or discontinuous mode control. This ensures predictable EMI profile and consistent loop dynamics but results in reduced light-load efficiency compared to DCDCs with eco-mode.

How is thermal performance affected if the PowerPAD™ is not soldered on TPS54310PWPG4?

If the PowerPAD™ thermal pad is unsoldered, R_θJA increases from 26 °C/W to 57.5 °C/W. At 3 A output and 5 V input, junction temperature would exceed 150°C within seconds - triggering thermal shutdown. Full thermal performance requires soldering the exposed pad to a solid AGND copper plane with ≥6 thermal vias.

Can TPS54310PWPG4 be synchronized to an external clock source?

Yes, TPS54310PWPG4 supports external synchronization from 330 kHz to 700 kHz via the SYNC pin. A resistor must be connected from RT to AGND to set the free-running frequency to ~80% of the external clock frequency. The SYNC pin accepts TTL/CMOS logic levels and includes deglitching to reject noise.

What is the minimum output voltage achievable with TPS54310PWPG4?

The minimum output voltage of TPS54310PWPG4 is 0.9 V, set by its internal 0.891 V reference (±1%). Output voltage is calculated as V_OUT = 0.891 V × (1 + R1/R2), where R1 and R2 form the feedback divider. For 0.9 V, R2 must be tied directly to AGND (R2 = 0 Ω), and R1 omitted - though practical designs use small R2 values to avoid noise sensitivity.