Texas Instruments TPS612564CYFFR

Overview

TPS612564CYFFR from Texas Instruments is a synchronous step-up DC-DC converter in 9-pin NanoFree™ DSBGA packaging, delivering fixed 5.4 V output at up to 800 mA from input voltages as low as 2.3 V. It operates at 3.5 MHz with 93% peak efficiency, 37 µA quiescent current in PFM mode, ±2% DC output accuracy, and supports pass-through mode when EN is pulled low - ideal for NFC power amplifier supply in space-constrained mobile devices.

For engineers reviewing the TPS612564CYFFR datasheet, TPS612564CYFFR pinout, TPS612564CYFFR application, or TPS612564CYFFR equivalent, key selection considerations include its 5.4 V fixed output, 2.3–5.5 V input range, thermal shutdown (140°C), valley-current limiting (2.15 A typ), and ultra-small 1.206 mm × 1.306 mm CSP footprint for Li-ion–powered portable electronics.

Technical Context

The TPS612564CYFFR uses quasi-constant on-time valley current mode control with adaptive slope compensation, enabling stable regulation across wide VIN/VOUT ratios and fast transient response without external compensation. Its architecture supports seamless transition between PWM (moderate/heavy load) and PFM (light load) operation to sustain high efficiency down to 1 mA.

It integrates dual MOSFETs (170 mΩ high-side, 100 mΩ low-side), undervoltage lockout (2.1 V threshold with 100 mV hysteresis), internal soft-start, and thermal regulation that reduces output current above ~110°C before full thermal shutdown at 140°C. Pass-through mode enables direct VIN-to-VOUT conduction with 500 mA minimum current limit and minimal voltage drop.

Key Specifications

Pinout & Package

TPS612564CYFFR is housed in a 9-bump DSBGA (NanoFree™) package measuring 1.206 mm × 1.306 mm with 0.4 mm pitch. The package uses chip-scale construction with solder bumps on bottom side for direct PCB mounting and optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS612564CYFFR, the TPS61256CYFFR and TPS612562CYFFR share identical thermal behavior, package, pinout, and efficiency profile but differ solely in regulated output voltage - making them drop-in replacements where voltage tolerance allows, without layout or firmware changes.

Availability

TPS612564CYFFR is available at Aetrix Electronics and suitable for NFC power amplifiers, smartphone camera flash systems, and USB OTG charging ports requiring stable component supply, high-volume manufacturability, and long-term lifecycle support.

Supply support for TPS612564CYFFR 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 designing analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The TPS61256x product line delivers highly integrated, ultra-compact boost converters optimized for battery-powered portable electronics - specifically targeting space-constrained applications demanding high efficiency, low quiescent current, and seamless pass-through functionality.

FAQ

What is the regulated output voltage of the TPS612564CYFFR?

The TPS612564CYFFR provides a fixed 5.4 V output with ±2% total DC voltage accuracy across line, load, and temperature conditions. This value is factory-trimmed and does not require external feedback resistors. The TPS612564CYFFR achieves this regulation using an internal error amplifier and reference, ensuring stable rail generation for sensitive RF and imaging circuits without additional components.

Does the TPS612564CYFFR support pass-through mode, and how is it activated?

Yes, the TPS612564CYFFR supports pass-through mode when the EN pin is pulled low while VIN remains above the UVLO threshold (2.1 V). In this mode, the output follows the input voltage minus small drops across the inductor DCR and high-side FET rDS(on), enabling zero-switching-loss conduction. The TPS612564CYFFR maintains a minimum 500 mA current limit in pass-through mode, providing safe conduction without external current sensing.

What is the maximum continuous output current capability of the TPS612564CYFFR?

The TPS612564CYFFR supports up to 800 mA of continuous output current under typical operating conditions (VIN ≥ 3.3 V, TA = 25°C, proper PCB layout). Its valley-current limit is set to 2.15 A (typ), allowing robust transient handling. Actual deliverable current depends on input voltage, ambient temperature, and thermal design - at 2.65 V input, the TPS612564CYFFR sustains 800 mA with adequate derating per thermal metrics (RθJA = 108.3°C/W).

Which external components are required for basic operation of the TPS612564CYFFR?

The TPS612564CYFFR requires only three external components: one input capacitor (4.7 µF, 0402 X5R), one output capacitor (10 µF, 0603 X5R), and one power inductor (1.0 µH, 1.8 A saturation current). No feedback resistors, compensation networks, or bootstrap capacitors are needed. This minimal BOM enables the TPS612564CYFFR to achieve total solution size under 25 mm² - verified in TI's reference design SLVSDQ1A.

What thermal protection features does the TPS612564CYFFR include?

The TPS612564CYFFR incorporates dual thermal protections: active thermal regulation beginning at ~110°C (reducing output current to prevent runaway) and hard thermal shutdown at 140°C (typ) with 20°C hysteresis. Both functions are fully internal and require no external circuitry. During pre-charge or overload, the TPS612564CYFFR automatically limits current to maintain safe junction temperature - critical for reliability in sealed portable enclosures.