Texas Instruments TPS63050YFFR

Overview

TPS63050YFFR from Texas Instruments is a synchronous buck-boost DC/DC converter IC with adjustable output voltage, 2.5–5.5 V input range, 500 mA continuous output current in boost mode, 90%+ efficiency in boost and 95%+ in buck mode, and 2.5 MHz switching frequency. It enables seamless buck-to-boost transition in portable battery-powered systems where input voltage may dip below or rise above the regulated output.

For engineers reviewing the TPS63050YFFR datasheet, TPS63050YFFR pinout, TPS63050YFFR application, or TPS63050YFFR equivalent, key selection criteria include programmable input current limit (via ILIM0/ILIM1), adjustable soft-start (SS pin), PFM/PWM mode control, power-good (PG) open-drain output, and support for 1.5 µH inductors with 10 µF output capacitance.

Technical Context

The TPS63050YFFR implements average-current-mode control using four internal N-channel MOSFETs-operating as either buck (VIN > VOUT) or boost (VIN < VOUT) with one switch held on and one held off to minimize switching losses. Seamless mode transition occurs without output disruption when VIN crosses VOUT.

It integrates undervoltage lockout (1.7 V threshold, 200 mV hysteresis), thermal shutdown (140°C, 20°C hysteresis), overvoltage protection (6.7 V clamp), and short-circuit protection (1.5 A current limit). Power-save mode activates automatically below ~150 mA load, reducing switching frequency and quiescent current to <65 µA.

Key Specifications

Pinout & Package

TPS63050YFFR is packaged in a 1.6 mm × 1.2 mm, 12-pin DSBGA (WCSP) package with 0.4 mm pitch and bottom-side solder balls. Thermal performance includes R_θJA = 89.9°C/W (JEDEC high-k board) and R_θJB = 43.9°C/W, supporting compact, thermally constrained layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS63050YFFR, TPS63051YFFT offers identical performance with fixed output and reduced external components, while MAX77827BEWL+T trades configurability for ultra-compact packaging and integrated load control-making each suitable for distinct subsystem requirements in portable electronics.

Availability

TPS63050YFFR is available at Aetrix Electronics and suitable for cellular accessories, smart grid meters, tablet docks, PC peripherals, and battery-powered IoT edge nodes requiring stable component supply, long-lifecycle support, and consistent parametric performance.

Supply support for TPS63050YFFR 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 and battery-aware power architectures.

The TPS6305x product line was designed specifically for space- and efficiency-constrained portable electronics needing seamless input-voltage-flexible regulation-targeting smartphones, wearables, and smart infrastructure devices where battery voltage spans above and below the required system rail.

FAQ

What is the function of the SS pin on the TPS63050YFFR?

On the TPS63050YFFR, the SS (soft-start) pin accepts an external capacitor to control the output voltage ramp rate during startup. The device charges this capacitor at a constant 3.2 µA current, ensuring monotonic VOUT rise and limiting inrush current into output capacitance. Floating the SS pin defaults to ~280 µs (buck) or ~600 µs (boost) soft-start time, but adding a capacitor allows precise timing adjustment per application requirements.

How does the TPS63050YFFR handle input voltages both above and below the output voltage?

The TPS63050YFFR uses a four-switch synchronous buck-boost topology with average-current-mode control to automatically and seamlessly transition between buck and boost modes. When VIN exceeds VOUT, it operates as a buck converter; when VIN falls below VOUT, it switches to boost-without output interruption. This ensures continuous regulation across the full 2.5–5.5 V input range for any user-programmed VOUT between 2.5 V and 5.5 V.

Can the TPS63050YFFR be used with a fixed 3.3 V output without external resistors?

No-the TPS63050YFFR is the adjustable-output variant and requires an external resistor divider from VOUT to FB to set the output voltage. For fixed 3.3 V operation without external components, TI offers the pin-compatible TPS63051YFFT, where the FB pin is internally connected to VOUT. Using the TPS63050YFFR for fixed 3.3 V would require two precision resistors (e.g., 100 kΩ and 24.3 kΩ) to achieve the 0.8 V feedback reference.

What is the purpose of the ILIM0 and ILIM1 pins on the TPS63050YFFR?

The ILIM0 and ILIM1 pins on the TPS63050YFFR configure the programmable input current limit during startup and steady-state operation. These two logic inputs select one of four current-limit thresholds (e.g., 0.4×I_{IN_MAX} to I_{IN_MAX}), preventing excessive inrush into input capacitance and protecting the IC and source during cold start or battery recovery. Both pins must be actively driven-neither can be left floating.

Does the TPS63050YFFR provide power-good signaling, and how is it implemented?

Yes-the TPS63050YFFR includes an open-drain PG (power-good) output that signals valid regulation. PG goes high-impedance when VOUT reaches ≥95% of its nominal value and is actively pulled low if VOUT drops below ~90%, or during UVLO, thermal shutdown, or current limit. An external pullup resistor (to ≤5.5 V) is required. PG functionality depends on EN being high and at least one of ILIM0/ILIM1 being high; otherwise, PG remains open-drain.