Texas Instruments TPS628304ARZER

Overview

TPS628304ARZER from Texas Instruments is a 4-A synchronous step-down DC/DC converter in a 1.0 mm × 2.0 mm WQFN package, operating from 2.25 V to 5.5 V input and delivering adjustable output from 0.5 V to 4.5 V with 1% feedback voltage accuracy across –40°C to 125°C. It features DCS-Control topology, 2.0 MHz switching frequency, 7 µA quiescent current, and integrated on-chip noise-filtering capacitors for CISPR 11/32 compliance-targeted at high-density power rails in SSDs and industrial PCs.

For engineers reviewing the TPS628304ARZER datasheet, TPS628304ARZER pinout, TPS628304ARZER application, or TPS628304ARZER equivalent, key selection considerations include its 4-A output capability, hiccup-mode overcurrent protection, MODE-pin controllable PSM/PWM operation, active output discharge, and power-good signal with 128 µs startup delay-critical for sequencing and low-noise point-of-load designs.

Technical Context

The TPS628304ARZER implements DCS-Control topology with adaptive constant-on-time modulation, enabling seamless transition between PWM (2 MHz fixed) and PFM (variable frequency) based on load. Its fast comparator supports improved transient response under both modes, while integrated on-die decoupling capacitors reduce high-frequency EMI above 450 MHz.

It supports 100% duty-cycle operation for ultra-low dropout, uses internal 35 mΩ/18 mΩ MOSFETs, and incorporates thermal shutdown (150°C trip, 20°C hysteresis), UVLO (2.15 V rising threshold), and hiccup-mode OCP triggered after 32 consecutive current-limit cycles-ensuring robustness in ASIC/SoC supply and industrial embedded applications.

Key Specifications

Pinout & Package

TPS628304ARZER is housed in an 8-pin WQFN package (RZE), measuring 1.0 mm × 2.0 mm with 0.4 mm pitch and wettable flanks. The package supports high thermal performance (R_θJA = 105.7°C/W JEDEC) and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down converter applications.

Compared with TPS628304KRZER and TPS62864ARZXR, the TPS628304ARZER uniquely combines 300 µs soft-start, MODE-pin controllability, and on-chip EMI filtering-making it optimal for space-constrained, low-noise, and dynamically sequenced power rails.

Availability

TPS628304ARZER is available at Aetrix Electronics and suitable for solid-state drives, industrial PCs, and analog security cameras requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS628304ARZER 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, embedded processing, and power management ICs, with decades of leadership in high-efficiency DC/DC conversion technology.

The TPS62830x product line was designed specifically for high-density, low-EMI point-of-load applications in portable, industrial, and computing systems-emphasizing thermal efficiency, transient response, and regulatory compliance without external filtering.

FAQ

What is the maximum continuous output current of the TPS628304ARZER?

The TPS628304ARZER delivers 4 A continuous output current under recommended operating conditions (T_J ≤ 125°C). At full 4 A load, lifetime is reduced if junction temperature exceeds 105°C-thermal design must ensure adequate PCB copper and airflow to maintain reliability. Derating curves and thermal metrics (R_θJA = 105.7°C/W) are provided in the datasheet for layout optimization.

Does the TPS628304ARZER support adjustable output voltage?

Yes, the TPS628304ARZER supports fully adjustable output voltage from 0.5 V to 4.5 V using an external resistor divider on the FB pin. The internal 0.5 V reference achieves ±1% accuracy across –40°C to 125°C, enabling precise regulation for core voltages in SoCs, FPGAs, and MCUs without requiring fixed-output variants.

How does the MODE pin affect operation of the TPS628304ARZER?

The MODE pin selects between automatic PSM/PWM mode (pin pulled low) and forced-PWM mode (pin pulled high). In PSM mode, efficiency remains high at light loads via variable-frequency operation; in forced-PWM, switching stays fixed at 2.0 MHz for lowest output ripple and predictable EMI-critical for noise-sensitive analog circuits powered by the TPS628304ARZER.

What protection features are included in the TPS628304ARZER?

The TPS628304ARZER integrates hiccup-mode overcurrent protection (OCP), thermal shutdown (150°C trip, 20°C hysteresis), undervoltage lockout (UVLO), active output discharge, and power-good monitoring. Its OCP triggers after 32 consecutive current-limit cycles and auto-recovers-unlike latch-off variants-making the TPS628304ARZER ideal for applications requiring fault resilience without manual reset.

Is the TPS628304ARZER suitable for low-EMI designs?

Yes-the TPS628304ARZER incorporates on-chip noise-filtering capacitors and an optimized gate driver to suppress high-frequency EMI, and test data confirms CISPR 11/32 compliance on standard EVMs. Radiated emissions meet Class A/B limits at 3 m distance, reducing or eliminating the need for external ferrites or shielding-directly benefiting designs using the TPS628304ARZER in EMI-sensitive environments like medical or imaging equipment.