Texas Instruments TPS6285020MDRLR

Overview

TPS6285020MDRLR from Texas Instruments is a fixed 1.8V, 2A continuous synchronous step-down DC/DC converter in an 8-pin SOT583 package. It operates from 2.7V–6V input, delivers 1% feedback voltage accuracy across –40°C to +150°C junction temperature, and supports adjustable or synchronized 1.8MHz–4MHz switching frequency. It serves as a high-efficiency point-of-load regulator for FPGA core supplies and industrial microcontrollers.

For engineers reviewing the TPS6285020MDRLR datasheet, TPS6285020MDRLR pinout, TPS6285020MDRLR application, or TPS6285020MDRLR equivalent, key selection considerations include its fixed 1.8V output, 2A continuous current capability, forced-PWM/PFM mode control via MODE/SYNC, active output discharge, and power-good window comparator with 40µs deglitch timing.

Technical Context

The TPS6285020MDRLR uses peak current mode control with internal compensation selectable via COMP/FSET pin configuration-enabling stable operation with 8–200µF ceramic output capacitance. Its dual-compensation architecture adapts loop bandwidth to output capacitor value, supporting both low-ESR small-capacitor designs (≥10µF) and high-transient-response large-capacitor layouts (≥18µF).

It implements a hybrid control scheme: forced PWM mode (MODE/SYNC = high) enables deterministic 1.8–4MHz switching with ±12% resistor-set tolerance, while PWM/PFM mode (MODE/SYNC = low) dynamically reduces frequency under light load to maintain >90% efficiency down to 1mA. Thermal shutdown triggers at 170°C with 15°C hysteresis, and the open-drain PG pin asserts low during UVLO, soft start, or out-of-regulation conditions.

Key Specifications

Pinout & Package

TPS6285020MDRLR is housed in an 8-pin SOT583 package (1.60mm × 2.10mm), optimized for high-density PCB layouts and thermal performance with exposed pad (DRL variant). The package supports JEDEC-standard 4-layer board thermal relief (R_θJA = 110°C/W) and achieves R_θJB = 20°C/W to PCB for efficient heat transfer.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS6285020MDRLR, TPS628502DRLR offers output voltage flexibility at the cost of two external resistors and slightly increased design complexity, while TPS62933RTER trades compact size and fixed-voltage simplicity for higher current and enhanced accuracy-making it over-specified for standard 1.8V/2A POL needs.

Availability

TPS6285020MDRLR is available at Aetrix Electronics and suitable for industrial motor drives, factory automation PLCs, and building automation sensor hubs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TPS6285020MDRLR 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 ICs, with decades of expertise in high-reliability DC/DC conversion.

The TPS62850x product line was designed specifically for space-constrained, thermally demanding industrial and automation applications requiring high efficiency, wide temperature operation, and functional safety documentation support.

FAQ

What is the output voltage of the TPS6285020MDRLR?

The TPS6285020MDRLR has a factory-trimmed fixed output voltage of 1.8V. Unlike adjustable variants such as TPS628502DRLR, it does not require external feedback resistors-reducing BOM count and layout area while guaranteeing ±1% accuracy across –40°C to +150°C junction temperature. This makes the TPS6285020MDRLR ideal for powering standardized 1.8V logic rails in industrial controllers and sensor nodes.

Does the TPS6285020MDRLR support external clock synchronization?

Yes, the TPS6285020MDRLR supports external clock synchronization via its MODE/SYNC pin (Pin 3), accepting a 1.8MHz–4MHz square wave with 20%–80% duty cycle. When synchronized, the internal PLL locks within 50µs, maintaining phase coherence across multiple converters-critical for reducing beat frequencies in multi-rail test equipment. The TPS6285020MDRLR retains full functionality including power-good assertion and thermal protection during sync operation.

What is the maximum continuous output current for the TPS6285020MDRLR?

The TPS6285020MDRLR delivers 2A continuous output current at junction temperatures up to 105°C, and supports 3A peak current at ≤85°C. Its internal MOSFETs feature 65mΩ high-side and 33mΩ low-side R_DS(ON) (at VIN ≥ 5V), enabling high efficiency (>92% at 1A, 5V_IN/1.8V_OUT) without external heatsinking. Derating curves in the datasheet confirm 2A operation remains viable at 125°C ambient with proper PCB copper pour.

How does the power-good (PG) pin function on the TPS6285020MDRLR?

The PG pin on the TPS6285020MDRLR is an open-drain output driven by a window comparator monitoring FB voltage. It asserts low during device disable, UVLO, thermal shutdown, soft start, or when VOUT deviates beyond ±5% of nominal (92%–113% VFB). With 40µs deglitch timing, it rejects transient dips while ensuring reliable system reset signaling. A pull-up resistor to any voltage ≤6V is required; unused PG pins may be tied to GND.

Can the TPS6285020MDRLR operate with 100% duty cycle?

Yes, the TPS6285020MDRLR supports true 100% duty-cycle operation, allowing VOUT to remain regulated even when VIN drops to VOUT + ~50mV (e.g., 1.85V input for 1.8V output). This capability extends battery runtime in portable devices by utilizing the full cell voltage range. The device maintains regulation without dropout or oscillation, and PG remains asserted as long as output stays within the window comparator bounds.