Texas Instruments TPS62143RGTR

Overview

TPS62143RGTR from Texas Instruments is a synchronous step-down DC-DC converter optimized for high power density applications. It delivers up to 2 A continuous output current, operates from 3 V to 17 V input, regulates fixed 5.0 V output, and features DCS-Control™ topology with 2.5 MHz typical switching frequency. It is used in POL supplies for embedded systems and solid-state drives.

For engineers reviewing the TPS62143RGTR datasheet, TPS62143RGTR pinout, TPS62143RGTR application, or TPS62143RGTR equivalent, key selection criteria include its 5.0 V fixed output, 17 µA quiescent current in power-save mode, open-drain power-good output, 16-pin VQFN-3×3 mm package, and seamless PWM-to-power-save mode transition under light loads.

Technical Context

The TPS62143RGTR implements DCS-Control™ topology, combining fast transient response via direct output voltage sensing with stable DC regulation through an internal compensated voltage feedback loop. Its control architecture supports both continuous conduction mode (CCM) at 2.5 MHz (FSW = low) and variable-frequency power-save mode at light loads without output disturbance.

It integrates dual MOSFET power switches with 90 mΩ high-side and 40 mΩ low-side R_DS(on) (VIN ≥ 6 V), supports 100% duty-cycle operation for ultra-low dropout, and includes undervoltage lockout (2.7 V threshold, 200 mV hysteresis), thermal shutdown (160°C), and short-circuit protection with reduced 1.6 A current limit below 0.5 V output.

Key Specifications

Pinout & Package

TPS62143RGTR is housed in a thermally enhanced 16-pin VQFN package (RGT) measuring 3.00 mm × 3.00 mm with exposed thermal pad soldered to AGND/PGND for optimal power dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62143RGTR, TPS62142RGTR offers identical performance at 3.3 V for logic-sensitive applications, while TPS62150ARGTR trades fixed-voltage simplicity for design flexibility - both share the same thermal profile, footprint, and sequencing capabilities.

Availability

TPS62143RGTR is available at Aetrix Electronics and suitable for embedded systems power, solid-state drive (SSD) rails, and mobile PC core logic requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS62143RGTR 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 consumer markets.

The TPS6214x family was designed specifically for high-density point-of-load applications demanding small solution size, fast transient response, and seamless light-load efficiency - targeting SSDs, embedded computing, and portable electronics.

FAQ

What is the fixed output voltage of the TPS62143RGTR?

The TPS62143RGTR provides a factory-set fixed output voltage of 5.0 V with ±1.5% initial accuracy over temperature. This eliminates the need for external feedback resistors and simplifies layout. The device also supports a +5% margining option (5.25 V) via the DEF pin, enabling voltage tolerance testing without hardware changes. All electrical characteristics in the datasheet - including load regulation, line regulation, and efficiency curves - are specified at this nominal 5.0 V output.

Does the TPS62143RGTR require external compensation components?

No, the TPS62143RGTR does not require external compensation components. It uses TI's DCS-Control™ topology with an internally compensated regulation network optimized for small ceramic output capacitors (e.g., 22 µF). This allows stable operation with low-ESR MLCCs and eliminates the need for external RC networks or type-II/type-III compensators. The integrated compensation ensures fast transient response and robust stability across input voltage, load, and temperature variations without user tuning.

How does the power-good (PG) pin function on the TPS62143RGTR?

The TPS62143RGTR features an open-drain power-good (PG) output that signals when the regulated 5.0 V output reaches 95% of nominal (4.75 V). It remains high-impedance during startup, shutdown, UVLO, or thermal shutdown - requiring an external pullup resistor (to ≤7 V) for proper logic-level definition. The PG pin sinks up to 2 mA when active-low, enabling reliable sequencing with host processors or other power rails. Its behavior is identical to the TPS62140/TPS62141 variants, differing only from the TPS62140A which asserts PG low during shutdown.

Can the TPS62143RGTR operate with input voltage close to its 5.0 V output?

Yes, the TPS62143RGTR supports 100% duty-cycle operation, allowing it to maintain regulation even when input voltage drops near the 5.0 V output level. In this mode, the high-side MOSFET remains continuously on, minimizing dropout losses. The minimum functional input voltage depends on load current and component resistances: V_IN(min) ≈ V_OUT + I_OUT × (R_{DS(on)_HS} + R_L). For example, at 2 A load with typical 90 mΩ high-side R_DS(on) and 20 mΩ inductor DCR, regulation holds down to ~5.22 V - extending usable battery life in Li-ion applications.

What thermal considerations apply to the TPS62143RGTR in a 2-A application?

In a 2-A application at 12-V input and 5-V output, the TPS62143RGTR dissipates approximately 0.7 W. With its R_θJA of 45°C/W, junction temperature rise above ambient is ~32°C - well within the 125°C max operating junction temperature. To ensure reliability, the exposed thermal pad must be soldered to a minimum 100 mm² copper area connected to AGND/PGND planes. Thermal vias (≥6×0.3-mm diameter) under the pad are recommended. Derating is advised above 60°C ambient; efficiency data shows >90% at 2 A, reducing self-heating compared to less efficient alternatives.