Texas Instruments TPS630252YFFT

Overview

TPS630252YFFT from Texas Instruments is a fixed-output 3.3 V, high-efficiency synchronous buck-boost DC/DC converter in a 20-pin DSBGA package. It delivers up to 2 A continuous output current with input voltage range 2.3 V–5.5 V, 95% peak efficiency in buck or boost mode, and 2.5 MHz switching frequency. It enables stable power delivery in battery-powered portable electronics where input voltage may dip below or rise above the regulated rail.

For engineers reviewing the TPS630252YFFT datasheet, TPS630252YFFT pinout, TPS630252YFFT application, or TPS630252YFFT equivalent, key selection criteria include its seamless buck-boost transition, integrated soft start, true shutdown with output discharge, 35 µA quiescent current, and fixed 3.3 V output with ±1% accuracy in PWM mode.

Technical Context

The TPS630252YFFT implements average current-mode control using four internal N-channel MOSFETs, operating as a buck converter when VIN > VOUT and as a boost converter when VIN < VOUT - with no simultaneous switching of all four FETs. Its control logic ensures one switch remains on and one off to minimize switching losses and maintain high efficiency across the full input range.

It features automatic PFM/PWM mode transition at ~350 mA load, undervoltage lockout (1.7 V typical with 180 mV hysteresis), thermal shutdown (140 °C), and dedicated VINA and VIN pins to isolate analog and power ground paths. The device supports dynamic voltage positioning (+1.3% nominal in PFM mode) to reduce output capacitor requirements during load transients.

Key Specifications

Pinout & Package

TPS630252YFFT is housed in a 1.766 mm × 2.086 mm, 20-pin DSBGA (YFF) package with 0.4 mm pitch and bottom-side thermal pad. The package supports high-density PCB layouts and efficient heat dissipation via PCB copper area under the die.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS630252YFFT, TPS630251YFFT offers identical performance at 2.9 V but cannot replace it in 3.3 V systems without hardware change, while MAX77827BEWC+T provides functional equivalence with trade-offs in quiescent current, thermal metrics, and safety features - making TPS630252YFFT optimal for space-constrained, battery-life–critical 3.3 V applications requiring integrated discharge and seamless mode transition.

Availability

TPS630252YFFT is available at Aetrix Electronics and suitable for smartphone power management, wearable sensor hubs, industrial handheld terminals, and USB-C powered accessories requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS630252YFFT 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 TPS63025x product line was designed specifically for compact, battery-powered portable electronics requiring single-inductor buck-boost regulation with minimal external components and robust protection features.

FAQ

What is the output voltage tolerance of the TPS630252YFFT under varying load and temperature?

The TPS630252YFFT delivers a fixed 3.3 V output with ±1% accuracy in PWM mode across –40 °C to 85 °C ambient temperature and 0–2 A load. In PFM mode, accuracy is ±1.3% due to dynamic voltage positioning. This specification is verified per TI's SLVSBJ9B datasheet Section 8.5, ensuring reliable operation in precision 3.3 V rail applications without external trimming.

Does the TPS630252YFFT require external feedback resistors to set the output voltage?

No, the TPS630252YFFT has an internally trimmed 3.3 V reference and does not require external feedback resistors. The FB pin (A4) is internally connected to VOUT. This simplifies layout, reduces BOM count, and improves long-term stability compared to adjustable variants like TPS630250, which require external R1/R2 dividers.

How does the TPS630252YFFT handle input voltage transitions across the 3.3 V output level?

The TPS630252YFFT automatically and seamlessly transitions between buck and boost modes as VIN crosses 3.3 V, using average current-mode control with no output interruption or regulation loss. During transition, it alternates buck and boost cycles to maintain stability - confirmed in TI's functional block diagram and Section 9.1 overview - ensuring uninterrupted power to sensitive loads like RF transceivers or real-time clocks.

What thermal performance can be expected from the TPS630252YFFT in a standard 2-layer PCB layout?

In a standard 2-layer PCB with 1 in² of 1-oz copper under the YFF package, the TPS630252YFFT exhibits a junction-to-board thermal resistance (R_θJB) of 11.4 °C/W. At 2 A output with 5 V input, typical power dissipation is ~250 mW, resulting in ~2.9 °C rise above board temperature - well within safe operating limits per Section 8.4 of the datasheet.

Can the TPS630252YFFT be used with ceramic output capacitors smaller than 20 µF?

Yes - the TPS630252YFFT supports output capacitance as low as 20 µF nominal (per Section 8.3), but due to DC bias effects in ceramic capacitors, a 47 µF 0603 X5R part is recommended to ensure ≥20 µF effective capacitance at 3.3 V. Using undersized or low-bias-capacity ceramics may cause instability or excessive ripple, especially in PFM mode where regulation bandwidth is reduced.