Texas Instruments TPS63050RMWR

Overview

TPS63050RMWR from Texas Instruments is an adjustable-output, synchronous buck-boost DC/DC converter with 1-A internal switches, 2.5–5.5 V input range, 0.5-A continuous output current at 3.3 V, and seamless buck-to-boost transition. It operates in PFM or forced PWM mode (2.5 MHz typical), supports programmable soft-start and input current limiting, and targets battery-powered portable electronics requiring stable regulated voltage across varying cell voltages.

For engineers reviewing the TPS63050RMWR datasheet, TPS63050RMWR pinout, TPS63050RMWR application, or TPS63050RMWR equivalent, key selection criteria include its adjustable feedback (0.8 V reference), 12-pin HotRod QFN package (2.5 mm × 2.5 mm), thermal shutdown (140°C), undervoltage lockout (1.7 V), and programmable average input current limit via ILIM0/ILIM1 pins.

Technical Context

The TPS63050RMWR implements average current-mode control using four internal N-channel MOSFETs-two for buck operation, two for boost-with one switch held on and one held off during each phase to minimize switching losses. Its seamless mode transition occurs automatically based on VIN vs. VOUT, avoiding discontinuous conduction or instability near crossover.

It integrates a transconductance error amplifier regulating FB to 0.8 V, reconstructs inductor current from high-side buck FET sensing, and uses dual sawtooth ramps (buck/boost) to determine switching sequence. Power Save Mode activates below ~150 mA load, reducing frequency and quiescent current (<65 µA) while maintaining regulation via comparator-based PFM.

Key Specifications

Pinout & Package

TPS63050RMWR is housed in a 2.5 mm × 2.5 mm, 12-pin HotRod™ QFN package (RMW suffix), featuring exposed thermal pad for enhanced power dissipation (R_θJB = 8.0°C/W). The package supports high-current routing and low-inductance switching paths critical for buck-boost stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS63050RMWR, TPS63051RMWR offers identical performance with simplified fixed-output configuration, while MP2155GQZ-P trades adjustability and integrated protections for higher current and extended input range-neither is pin-compatible, requiring layout revision for substitution.

Availability

TPS63050RMWR is available at Aetrix Electronics and suitable for cellular phones, smart grid meters, and tablet accessories requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS63050RMWR 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 technologies, with decades of expertise in high-efficiency DC/DC conversion.

The TPS6305x product line was designed specifically for space-constrained, battery-powered portable electronics needing reliable regulation across wide input ranges-emphasizing low quiescent current, seamless mode transition, and robust thermal management.

FAQ

What is the maximum continuous output current capability of the TPS63050RMWR?

The TPS63050RMWR delivers up to 500 mA continuous output current at 3.3 V when operating in boost mode (VIN ≥ 2.5 V). In buck mode, it supports up to 1 A, but the device's average input current limit and thermal constraints typically restrict practical continuous output to 500 mA for stable operation across ambient temperatures. This rating assumes proper PCB layout, 10 µF output capacitance, and adequate thermal relief via the exposed pad.

Does the TPS63050RMWR require external components to set the output voltage?

Yes, the TPS63050RMWR requires an external resistor divider connected between VOUT, FB, and GND to set the output voltage, as it features an adjustable feedback reference of 0.8 V. For example, a 3.3 V output uses a 1 MΩ top resistor and 240 kΩ bottom resistor. Unlike the fixed-output TPS63051RMWR, the TPS63050RMWR does not have internal feedback resistors and relies entirely on this external network for regulation accuracy and flexibility.

How does the PFM/PWM pin affect efficiency and noise performance of the TPS63050RMWR?

When the PFM/PWM pin is low, the TPS63050RMWR operates in automatic PFM/PWM mode, switching to pulse-frequency modulation at light loads (<150 mA) to reduce quiescent current and improve light-load efficiency-though with increased output ripple (up to 50 mV_PP). When high, it forces fixed-frequency PWM at 2.5 MHz, ensuring low-noise, predictable EMI behavior and tight regulation across all loads, at the cost of slightly higher idle current. This pin directly configures the TPS63050RMWR's operational envelope.

Can the TPS63050RMWR safely drive a short-circuited output?

Yes, the TPS63050RMWR includes short-circuit protection that limits output current to approximately 1.5 A when VOUT fails to rise above 1.2 V, preventing damage during fault conditions. This protection works independently of the programmable input current limit and remains active in both buck and boost modes. However, sustained short-circuit operation will trigger thermal shutdown (140°C), causing automatic recovery after cooldown-ensuring robustness without external circuitry.

What thermal performance can be expected from the TPS63050RMWR in a standard 2-layer PCB layout?

In a standard 2-layer PCB with 1 oz copper, the TPS63050RMWR exhibits a junction-to-board thermal resistance (R_θJB) of 8.0°C/W. At 500 mA output and 3.6 V input, typical power dissipation is ~120 mW; this yields a junction-to-ambient rise of ~37°C above board temperature. With ambient at 60°C, junction temperature stays well below the 125°C max operating limit-provided the thermal pad is fully soldered to a minimum 100 mm² copper pour per TI layout guidelines.