Texas Instruments TPS54418ARTER

Overview

TPS54418ARTER from Texas Instruments is a 2.95-V to 6-V input, 4-A synchronous step-down DC/DC converter with integrated 30-mΩ high- and low-side MOSFETs, 0.8 V ±1% voltage reference, adjustable 200 kHz–2 MHz switching frequency, and power-good output. It delivers high-efficiency point-of-load regulation for FPGAs, ASICs, and DSPs in space-constrained industrial and telecom systems.

For engineers reviewing the TPS54418ARTER datasheet, TPS54418ARTER pinout, TPS54418ARTER application, or TPS54418ARTER equivalent, this page provides verified functional context, validated package mapping (3 mm × 3 mm WQFN-16), confirmed thermal performance (R_θJA = 37°C/W), and real-world soft-start sequencing behavior - all critical for layout-sensitive buck converter integration.

Technical Context

The TPS54418ARTER implements peak-current-mode control with internal slope compensation to prevent subharmonic oscillation across 0–100% duty cycle. Its transconductance error amplifier (225 μS normal / 70 μS soft-start) compares VSENSE against either the 0.8 V reference or SS pin voltage, enabling precise regulation and controlled startup.

A phase-locked loop on the RT/CLK pin synchronizes switching to external clocks (300–2000 kHz), while BOOT-PH UVLO (2.1 V) and frequency foldback protect during overload. The device supports safe start-up into prebiased outputs and features 2% hysteresis on PWRGD for robust power-rail monitoring.

Key Specifications

Pinout & Package

TPS54418ARTER uses a thermally enhanced 3 mm × 3 mm, 16-pin WQFN package with exposed PowerPad for optimal heat dissipation. The PowerPad must be soldered to a PCB ground plane using ≥4 thermal vias.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS54418ARTER, TPS54428RTET omits PWRGD and raises minimum output voltage, while MP2345DJ-LF-Z sacrifices frequency adjustability and soft-start control - making TPS54418ARTER the only option supporting full rail monitoring, wide V_OUT range, and system-level clock synchronization.

Availability

TPS54418ARTER is available at Aetrix Electronics and suitable for telecom infrastructure, FPGA power delivery, and industrial PLC applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TPS54418ARTER 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 TPS54418A belongs to TI's SWIFT™ synchronous buck converter family, engineered for high-density, high-efficiency point-of-load regulation in FPGA, ASIC, and processor-based systems demanding precision, reliability, and thermal resilience.

FAQ

What is the maximum supported switching frequency for TPS54418ARTER?

The TPS54418ARTER supports a switching frequency range of 200 kHz to 2 MHz. At 2 MHz, it enables ultra-compact filter designs with sub-1-μH inductors and low-ESR ceramic capacitors. Frequency is set via an external resistor on the RT/CLK pin or synchronized to an external clock signal within the same range. Operation above 2 MHz is not guaranteed and may compromise stability or efficiency.

Does TPS54418ARTER support start-up into a precharged output?

Yes, TPS54418ARTER supports safe start-up into a precharged output capacitor. Its current-mode architecture and internal control logic prevent reverse current flow through the low-side MOSFET during initial turn-on. This eliminates the need for external reverse-current protection diodes or complex sequencing circuits when powering rails shared with other regulators.

How is the output voltage set on TPS54418ARTER?

The output voltage of TPS54418ARTER is set using a resistor divider from VOUT to the VSENSE pin, referenced to the internal 0.8 V ±1% bandgap. For example, a 100-kΩ top resistor (R1) and 100-kΩ bottom resistor (R2) yields 1.6 V output. TI recommends 1% tolerance resistors and values ≤1 MΩ to minimize noise sensitivity and VSENSE input current error.

What thermal performance can be expected from TPS54418ARTER in a standard 4-layer PCB?

On a JEDEC-standard 4-layer board (2 oz. copper, 2″×2″, 4 thermal vias under the PowerPad), TPS54418ARTER achieves R_θJA = 37°C/W. At 4 A load and 5 V_IN/1.8 V_OUT, junction temperature rise is ~133°C above ambient - well within its –40°C to +150°C operating range. Proper PowerPad soldering and thermal via placement are essential to achieve this rating.

Can TPS54418ARTER be synchronized to an external clock, and what are the timing requirements?

Yes, TPS54418ARTER can synchronize to an external clock applied to the RT/CLK pin. It accepts clock frequencies from 300 kHz to 2 MHz, with minimum pulse width of 75 ns and PLL lock-in time of 14 μs at 500 kHz. The device maintains tight phase alignment and tolerates jitter up to ±10% without losing lock, making it suitable for noise-critical communication systems.