Texas Instruments TPS54612PWPG4

Overview

TPS54612PWPG4 from Texas Instruments is a 3-V to 6-V input, 6-A synchronous buck PWM converter with integrated 30-mΩ high- and low-side MOSFETs, fixed 1.2-V output voltage (±2% over temperature/load), internal compensation, and PowerPAD™ HTSSOP-28 package. It delivers high efficiency in point-of-load regulation for FPGAs and microprocessors.

For engineers reviewing the TPS54612PWPG4 datasheet, TPS54612PWPG4 pinout, TPS54612PWPG4 application, or TPS54612PWPG4 equivalent, key selection factors include its 350/550 kHz fixed-frequency operation, 1.2-V ±2% output accuracy, 30-mΩ integrated MOSFETs, thermal shutdown at 150°C, and powergood signaling via open-drain PWRGD.

Technical Context

The TPS54612PWPG4 implements a voltage-mode synchronous buck topology with an internally compensated error amplifier (3–5 MHz unity-gain bandwidth) and adaptive dead-time control to prevent shoot-through. Its PWM comparator features 70–85 ns propagation delay and 100 ns leading-edge blanking for robust current-limit response.

It supports dual-frequency selection (350 kHz or 550 kHz) via the FSEL pin and external frequency tuning (280–700 kHz) using an RT-to-AGND resistor. The device operates in continuous conduction mode (CCM) across full 0–6 A load range and includes UVLO (2.95 V start / 2.8 V stop), slow-start (4.5 ms internal), and thermal shutdown (150°C trip / 140°C hysteresis).

Key Specifications

Pinout & Package

TPS54612PWPG4 uses a thermally enhanced 28-pin HTSSOP (PWP) package with exposed PowerPAD™ thermal pad. The package requires solder connection of the thermal pad to a large copper pour on the PCB for optimal thermal performance (R_θJA = 18.2°C/W with solder).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS54620RGYT and MP2315GJ-Z, the TPS54612PWPG4 provides superior thermal performance in compact layouts via PowerPAD™, guaranteed 1.2-V ±2% accuracy over full temperature range, and flexible frequency selection - making it ideal for high-density, thermally constrained FPGA/DSP point-of-load applications.

Availability

TPS54612PWPG4 is available at Aetrix Electronics and suitable for FPGA power delivery, DSP core supplies, industrial PLC modules, and notebook CPU voltage regulation requiring stable component supply and long-term production continuity.

Supply support for TPS54612PWPG4 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 over 50 years of innovation in high-reliability power conversion ICs.

The TPS5461x family was designed specifically for high-current, low-voltage point-of-load regulation in FPGA, ASIC, and microprocessor applications - emphasizing integration, thermal efficiency, and ease of use through internal compensation and PowerPAD™ packaging.

FAQ

What is the output voltage tolerance of the TPS54612PWPG4 over temperature and load?

The TPS54612PWPG4 delivers a fixed 1.2-V output with ±2.0% initial accuracy at 25°C and maintains ±2.0% regulation across –40°C to 125°C junction temperature and 0–6 A load range. This specification is verified per TI's SLVS400D datasheet Section 6.5, ensuring stable core voltage for sensitive digital logic without external trimming.

Does the TPS54612PWPG4 require external compensation components?

No, the TPS54612PWPG4 features an internally compensated voltage-mode control loop optimized for standard 4.7–10 µH inductors and typical output capacitor values. This eliminates external compensation networks while maintaining <20 µs transient recovery and stable operation - confirmed in Section 7.3.6 and Figure 7 of the SLVS400D datasheet.

How does the TPS54612PWPG4 handle thermal overload conditions?

The TPS54612PWPG4 incorporates thermal shutdown that trips at 150°C junction temperature and releases at 140°C (10°C hysteresis). Upon trip, all MOSFETs disable and the controller halts switching. Recovery follows the internal slow-start sequence (4.5 ms for 1.2-V output), preventing thermal runaway during persistent faults - detailed in Section 7.3.10 of SLVS400D.

Can the switching frequency of the TPS54612PWPG4 be adjusted, and how?

Yes, the TPS54612PWPG4 supports three frequency modes: 350 kHz (FSEL ≤0.8 V), 550 kHz (FSEL ≥2.5 V), or externally adjustable 280–700 kHz via an RT-to-AGND resistor (e.g., 100 kΩ yields ~500 kHz). This flexibility enables EMI optimization without layout changes - specified in Table 2 and Section 7.3.5 of SLVS400D.

What is the role of the PowerPAD™ thermal pad in the TPS54612PWPG4 HTSSOP-28 package?

The exposed PowerPAD™ on the TPS54612PWPG4's underside serves as the primary thermal path to the PCB. When soldered to a large copper pour, it reduces junction-to-ambient thermal resistance to 18.2°C/W (vs 40.5°C/W unsoldered), enabling 6-A continuous operation without heatsinks - validated in Section 6.3 and Figure 19 of SLVS400D.