Texas Instruments TPS54614PWPG4

Overview

TPS54614PWPG4 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 1.8-V output voltage (±3% over temperature/load), internal compensation, and PowerPAD™ HTSSOP-28 package for high thermal performance. It delivers point-of-load regulation for FPGAs and microprocessors in low-voltage, high-density systems.

For engineers reviewing the TPS54614PWPG4 datasheet, TPS54614PWPG4 pinout, TPS54614PWPG4 application, or TPS54614PWPG4 equivalent, key selection considerations include its 350/550 kHz fixed-frequency or 280–700 kHz adjustable switching, 3.3-ms internal slow-start time, powergood signaling, and thermal shutdown at 150°C - all critical for reliable processor core supply design.

Technical Context

The TPS54614PWPG4 implements a voltage-mode synchronous buck topology with an internally compensated error amplifier (3 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 integrates dual 30-mΩ MOSFETs rated for 12-A peak current, uses a dedicated VBIAS regulator (2.8 V typical) for internal circuitry, and supports precise sequencing via open-drain PWRGD (90% VREF threshold) and SS/ENA enable logic with 1.2 V turn-on threshold and 0.03 V hysteresis.

Key Specifications

Pinout & Package

TPS54614PWPG4 is housed in a thermally enhanced 28-pin HTSSOP (PWP) PowerPAD™ package with exposed thermal pad soldered to PCB ground plane for optimal junction-to-board thermal resistance (RθJB = 1.9°C/W).

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 TPS54614PWPG4 delivers best-in-class thermal management via PowerPAD™, guaranteed 1.8-V fixed output accuracy (±3%), and integrated sequencing support - making it ideal for FPGA/ASIC core rails where reliability and simplicity outweigh programmability needs.

Availability

TPS54614PWPG4 is available at Aetrix Electronics and suitable for FPGA core supplies, ASIC point-of-load regulation, industrial PLC CPU modules, and optical transceiver bias applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS54614PWPG4 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.

The TPS5461x family was designed specifically for low-input-voltage, high-current point-of-load applications in computing, communications, and industrial systems - emphasizing integration, thermal performance, and ease of use.

FAQ

What is the maximum continuous output current of the TPS54614PWPG4?

The TPS54614PWPG4 delivers 6 A continuously under recommended operating conditions (TJ ≤ 85°C, proper PCB thermal design with PowerPAD™ soldered to ground plane). Peak current capability reaches 12 A, enabling robust overload tolerance during transient events without shutdown.

Does the TPS54614PWPG4 require external compensation components?

No, the TPS54614PWPG4 features an internally compensated voltage-mode control loop, eliminating the need for external compensation networks. This allows direct use with standard 4.7 µH to 10 µH inductors and simplifies design while maintaining stability across operating conditions.

How does the powergood (PWRGD) function work on the TPS54614PWPG4?

The TPS54614PWPG4's PWRGD pin is an open-drain output that goes high-impedance when VSENSE ≥ 90% of the internal 0.891-V reference, indicating valid regulation. It pulls low during UVLO, SS/ENA disable, thermal shutdown, or VSENSE undervoltage - providing reliable reset signaling for processors and sequencers.

Can the switching frequency of the TPS54614PWPG4 be adjusted, and how?

Yes, the TPS54614PWPG4 supports three frequency modes: 350 kHz (FSEL ≤ 0.8 V), 550 kHz (FSEL ≥ 2.5 V), or 280–700 kHz adjustable via resistor from RT to AGND. For example, a 100-kΩ resistor sets ~500 kHz, enabling EMI reduction or inductor size optimization without changing layout.

What thermal performance can be expected from the TPS54614PWPG4 in a standard 4-layer PCB?

In a standard 3″ × 3″, 4-layer PCB with 1.5 oz copper on top/bottom layers and 12 thermal vias to inner ground planes, the TPS54614PWPG4 achieves RθJA = 18.2°C/W with soldered PowerPAD™. At 6-A load and 5-V input, junction temperature rise remains below 65°C - well within the 125°C max rating.