Texas Instruments TPS54A24RTWR

Overview

TPS54A24RTWR from Texas Instruments is a 4.5-V to 17-V input, 10-A synchronous step-down DC/DC converter in a 4-mm × 4-mm WQFN-24 package. It integrates high-side and low-side n-channel MOSFETs (R_DS(on) = 21 mΩ / 8 mΩ at 12 V), uses peak-current-mode control with 200 kHz–1.6 MHz adjustable switching frequency, and delivers precise 0.6-V ±0.85% reference voltage for output regulation from 0.6 V to 12 V. It powers FPGAs and SoCs in wired networking switches.

For engineers reviewing the TPS54A24RTWR datasheet, TPS54A24RTWR pinout, TPS54A24RTWR application, or TPS54A24RTWR equivalent, key selection considerations include its hiccup current limit, safe startup into prebiased outputs, PGOOD monitoring with 91–106% V_FB window, 3-µA shutdown current, and RT/CLK synchronization capability for multi-rail timing alignment.

Technical Context

The TPS54A24RTWR implements constant-frequency peak-current-mode control with internal slope compensation to prevent subharmonic oscillation across full duty cycle range. Its integrated high-side and low-side MOSFETs enable CCM operation under all loads, while BOOT-SW UVLO (2.2 V) supports 100% duty cycle operation when bootstrap voltage remains above threshold.

It features dual overcurrent protection: high-side peak current limit (13.4–15.8 A) and bidirectional low-side current limiting (−3.4 A sink / 10–14.6 A source), plus non-latch thermal shutdown at 170°C with 15°C hysteresis. The error amplifier (1100 µA/V transconductance, 80 dB DC gain) drives COMP for loop compensation and enables fast transient response.

Key Specifications

Pinout & Package

TPS54A24RTWR is housed in a thermally enhanced 24-pin WQFN package (4.00 mm × 4.00 mm body, exposed thermal pad). The package supports high-current routing with multiple VIN, PGND, and SW pins to minimize parasitic inductance and improve thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS54A24RTWR, the TPS544B25RVER offers higher current capacity but sacrifices RT/CLK synchronization, while the MP28164GR-Z reduces feature set and package compatibility-making TPS54A24RTWR optimal for applications demanding precise sequencing, EMI control, and robust fault monitoring in space-constrained designs.

Availability

TPS54A24RTWR is available at Aetrix Electronics and suitable for wired networking switches, wireless infrastructure base stations, and medical imaging equipment requiring stable component supply and long-term production continuity.

Supply support for TPS54A24RTWR 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and communications markets.

The TPS54A24RTWR belongs to TI's SWIFT™ synchronous buck converter family, engineered for high-density, high-efficiency point-of-load regulation in FPGA, SoC, and processor power delivery where thermal performance, small solution size, and precise sequencing are critical.

FAQ

What is the maximum output current capability of the TPS54A24RTWR?

The TPS54A24RTWR delivers up to 10 A continuous output current under recommended operating conditions (T_J ≤ 150°C, proper layout, and adequate thermal management). This rating is validated with integrated 21-mΩ high-side and 8-mΩ low-side MOSFETs at 12 V_IN, enabling single-chip solutions for mid-tier FPGAs and application processors without external power stages.

How does the TPS54A24RTWR support power supply sequencing in multi-rail systems?

The TPS54A24RTWR supports sequencing via its SS/TRK pin: connecting this pin to another regulator's output enables tracking mode, while adding an external capacitor sets independent soft-start timing. This allows controlled ramp-up order for core, I/O, and auxiliary rails-critical for avoiding latch-up in complex SoCs and FPGAs powered by multiple TPS54A24RTWR devices.

Can the TPS54A24RTWR synchronize its switching frequency to an external clock source?

Yes, the TPS54A24RTWR can synchronize to an external clock through the RT/CLK pin. In PLL mode, it locks to the falling edge of an input clock signal within 200–1600 kHz range, enabling deterministic switching alignment across multiple converters to suppress beat frequencies and simplify EMI filter design in dense PCB layouts.

What protection features does the TPS54A24RTWR include to ensure system reliability?

The TPS54A24RTWR includes hiccup current limiting, output overvoltage protection (OVP), non-latch thermal shutdown at 170°C, and PGOOD monitoring with 91–106% V_FB window. These features collectively prevent damage during short circuits, overloads, thermal runaway, and undervoltage/overvoltage faults-ensuring robust operation in mission-critical applications like medical imaging and telecom infrastructure.

What is the minimum input voltage required for the TPS54A24RTWR to assert a valid PGOOD signal?

The TPS54A24RTWR requires a minimum input voltage of 0.9 V to 1.0 V (depending on PGOOD load current) to generate a valid logic-level PGOOD output, as specified in the "Minimum VIN for valid output" parameter. Below this threshold, the internal bias circuitry cannot reliably drive the open-drain PGOOD transistor, making it unsuitable for ultra-low-VIN brownout detection without external supervision.