Texas Instruments TPS61046YFFR

Overview

TPS61046YFFR from Texas Instruments is a 1.8 V to 5.5 V input, 28-V output boost DC-DC converter with integrated 30-V power switch, isolation FET, and power diode in a 0.80-mm × 1.20-mm WCSP package. It delivers up to 900 mA switch current, operates at 1.0 MHz, achieves ±2% output voltage accuracy, and supports fixed 12-V output with only three external components - ideal for PMOLED panel power supplies.

For engineers reviewing the TPS61046YFFR datasheet, TPS61046YFFR pinout, TPS61046YFFR application, or TPS61046YFFR equivalent, key selection criteria include ultra-low 500-nA shutdown current, true input-output disconnection during shutdown, 10-ms internal soft start, output over-voltage protection (29.2 V), and thermal shutdown at 150°C.

Technical Context

The TPS61046YFFR uses current-mode control with adaptive constant off-time and operates in quasi-constant 1.0-MHz PWM mode under moderate-to-heavy load, switching to PFM power-save mode below ~140 mA peak inductor current. Its internal 795-mV feedback reference enables precise output regulation via external resistor divider or fixed 12-V configuration by connecting FB to VIN.

It integrates functional blocks including UVLO (1.55 V falling / 1.75 V rising), EN-controlled shutdown with <1-µA VIN current, pre-charge phase (30 mA for ~5 ms), and dual-stage soft start. Protection includes output short-circuit limiting (<200 mA at VOUT = 0 V), OVP (29.2 V threshold with 0.8-V hysteresis), and thermal shutdown (150°C with 20°C hysteresis).

Key Specifications

Pinout & Package

TPS61046YFFR is housed in a 6-ball, 0.80-mm × 1.20-mm WCSP (Wafer Chip Scale Package) with bottom-side solder balls. The package supports ultra-compact PCB layouts and is optimized for space-constrained portable applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61046YFFR, TPS61042YFFR offers cost savings but sacrifices 12-V overhead and peak current capability, while MAX17222ELT+T reduces size yet omits critical isolation and OVP features needed for medical/safety-critical use.

Availability

TPS61046YFFR is available at Aetrix Electronics and suitable for PMOLED power supplies, wearable device power management, and portable medical equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS61046YFFR 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.

The TPS61046YFFR belongs to TI's ultra-compact boost converter product line, engineered specifically for space- and power-constrained applications such as PMOLED panels, wearables, and portable medical sensors.

FAQ

What is the minimum input voltage required for TPS61046YFFR to start switching?

The TPS61046YFFR has an under-voltage lockout (UVLO) with a rising threshold of 1.75 V and falling threshold of 1.55 V. It begins switching once VIN rises above 1.75 V. After startup, it continues operating down to 1.6 V, enabling extended runtime from depleted Li+ or alkaline cells. This behavior is confirmed in Section 7.3 and 8.3.1 of the SLVSCQ7 datasheet.

Can TPS61046YFFR be used to generate a fixed 12-V output without external resistors?

Yes. The TPS61046YFFR supports fixed 12-V output by connecting the FB pin directly to the VIN pin - an internal reference sets the output without external components. This configuration is explicitly documented in Sections 1, 3, and 9.2.1 of the datasheet and reduces the total external part count to just three: inductor, input capacitor, and output capacitor.

Does TPS61046YFFR provide true input-to-output isolation during shutdown?

Yes. The TPS61046YFFR integrates an input/output isolation switch that opens the conduction path between VIN and VOUT during shutdown, reducing leakage current to under 1 µA. This feature is highlighted in the Features section and detailed in Section 8.1 and 8.3.2, making it suitable for battery-critical applications like wearables and medical patches.

What protection features are built into TPS61046YFFR?

The TPS61046YFFR includes output over-voltage protection (29.2 V threshold), output short-circuit protection (current limiting below 4 V), thermal shutdown (150°C), and UVLO. These are verified in Sections 7.5 and 8.3.4–8.3.6 of the datasheet. No external components are required to activate any of these protections.

What is the recommended inductor value range for TPS61046YFFR?

The datasheet specifies an effective inductance range of 1.0 µH to 22 µH (Section 7.3). Recommended values include 4.7 µH (TDK VLS4012-4R7M) and 10 µH (Toko FDSD0420-H-100M), selected for optimal efficiency, transient response, and DCM/CCM boundary operation. Inductor saturation current must exceed peak switch current (≥900 mA typ).