Texas Instruments TPS62650YFFR

Overview

TPS62650YFFR from Texas Instruments is a 6-MHz synchronous step-down DC-DC converter in a 9-pin NanoFree™ CSP package, delivering up to 800 mA output current with I²C-compatible dynamic voltage scaling (0.75 V to 1.4375 V in 12.5-mV steps), ±2% PWM DC accuracy, and 38 µA quiescent current. It serves as the core power supply for low-voltage DSP/processor cores in single-cell Li-ion–powered smartphones and handheld computers.

For engineers reviewing the TPS62650YFFR datasheet, TPS62650YFFR pinout, TPS62650YFFR application, or TPS62650YFFR equivalent, key selection criteria include its 6-MHz fixed-frequency operation, I²C interface speed up to 3.4 Mbps, PFM/PWM auto-mode switching, sub-1-mm profile, and support for ceramic capacitors and low-ESR inductors in ultra-compact power designs.

Technical Context

The TPS62650YFFR employs a frequency-locked ring-oscillating modulator architecture-eliminating traditional compensation loops-to achieve instantaneous transient response and inherent stability with small external components. Its non-linear control avoids loop instability across wide L/C variations.

It integrates dual MOSFETs (P-channel r_DS(on) = 255 mΩ @ 3.6 V; N-channel r_DS(on) = 140 mΩ @ 3.6 V), a 6-bit DAC for I²C-controlled output voltage, soft-start (<150 µs), and thermal shutdown (140 °C). Mode selection (PFM, PWM, forced PWM) and enable/reset are handled via EN, VSEL, and I²C registers.

Key Specifications

Pinout & Package

The TPS62650YFFR is housed in a 9-pin NanoFree™ chip-scale package (CSP-9), measuring 1.37 mm × 1.37 mm × 0.55 mm, with bottom-side solder bumps and no wire bonds - optimized for ultra-thin mobile PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62651YFFR, the TPS62650YFFR provides higher default voltages suitable for legacy OMAP™ cores, while both share identical dynamic scaling, transient response, and package. Against TPS62745DSSR, the TPS62650YFFR trades ultra-low I_Q for full I²C programmability - essential for any application requiring runtime voltage adaptation.

Availability

TPS62650YFFR is available at Aetrix Electronics and suitable for smartphone core power, OMAP™ SmartReflex™ systems, and ultra-thin wearable electronics requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for TPS62650YFFR 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-efficiency DC-DC conversion for portable electronics.

The TPS6265x product line was engineered specifically for battery-powered mobile processors requiring dynamic voltage scaling, ultra-small footprint, and best-in-class light-load efficiency - targeting OMAP™, Snapdragon™, and custom application processors.

FAQ

What is the default output voltage of the TPS62650YFFR when powered on?

The TPS62650YFFR has two factory-programmed default output voltages depending on VSEL pin state: 1.05 V when VSEL = GND, and 1.2 V when VSEL = VI. These defaults are loaded at power-up or EN rising edge before I²C communication begins. The TPS62650YFFR does not ship with a single fixed default - the actual value depends on the host board's VSEL termination. All subsequent I²C writes override these defaults.

Does the TPS62650YFFR support true pin-to-pin replacement with the TPS62651YFFR?

Yes, the TPS62650YFFR and TPS62651YFFR share identical pinout, package (CSP-9 YFF), electrical specifications (I²C timing, efficiency, quiescent current, protection features), and register map. The only difference is factory-programmed default output voltage (1.05 V/1.2 V vs. 0.95 V/1.1 V). No PCB changes are required when swapping between them - only firmware or VSEL routing may need review to match desired boot voltage.

What is the minimum recommended output capacitor for stable operation of the TPS62650YFFR?

The TPS62650YFFR is designed for use with 4.7-µF, 6.3-V, X5R ceramic capacitors in 0402 case size (e.g., Murata GRM155R60J475M), as validated in the datasheet typical application circuit. Using <2.2 µF or non-ceramic (e.g., tantalum) capacitors risks degraded transient response, increased output ripple (>24 mV peak-to-peak), and potential instability due to insufficient ESR zero placement - the TPS62650YFFR's control architecture relies on ceramic cap characteristics.

Can the TPS62650YFFR operate without an I²C controller connected?

Yes, the TPS62650YFFR operates fully autonomously without I²C: it powers up at its VSEL-determined default voltage, enters PFM/PWM auto-mode, and regulates normally. I²C is optional for dynamic voltage scaling or mode reconfiguration. Leaving SDA/SCL unconnected (with proper pull-ups) does not impair basic regulation - the TPS62650YFFR ignores I²C activity unless addressed, and its internal registers retain default values indefinitely.

What thermal derating applies to the TPS62650YFFR in a 2-layer PCB design?

In a standard 2-layer board (vs. the 4-layer JEDEC test board), the TPS62650YFFR's junction-to-ambient thermal resistance (θ_JA) increases from 105 °C/W to ~160–180 °C/W. At 800 mA load and 3.6 V input, power dissipation is ~240 mW; thus, ambient temperature must be limited to ≤65 °C to keep junction temperature below 105 °C. For sustained 800 mA operation, add thermal vias under the CSP-9 ground bumps and use ≥1 oz copper on both layers.