Texas Instruments TPS610992YFFT

Overview

TPS610992YFFT from Texas Instruments is a synchronous boost converter optimized for ultra-low-power battery systems, delivering fixed 2.5V output with 2.45–2.55V accuracy, 0.7–5.5V input range, and 600nA quiescent current into VOUT. It supports down mode regulation and true load disconnection in shutdown, enabling >75% efficiency at 10µA load in wearable optical heart rate monitors.

For engineers reviewing the TPS610992YFFT datasheet, TPS610992YFFT pinout, TPS610992YFFT application, or TPS610992YFFT equivalent, key selection criteria include its 2.5V fixed output, 6-ball WCSP package (1.23mm × 0.88mm), hysteretic control topology, and verified operation from single alkaline/coin-cell batteries - critical for memory LCD bias and low-power wireless sensor nodes.

Technical Context

The TPS610992YFFT implements a hysteretic current-mode control architecture that dynamically adjusts switching frequency to maintain constant inductor ripple current (300mA typ.) while enabling burst-mode operation under light loads. This eliminates fixed-frequency oscillator overhead and achieves 1µA total quiescent current.

It integrates dual-mode regulation: down mode maintains regulated 2.5V output when VIN exceeds VOUT (up to VIN = VOUT + 0.5V), then transitions to pass-through mode where VOUT ≈ VIN − (IL × DCR_L + IL × RDS(on)_HS); thermal shutdown activates at 150°C with 25°C hysteresis.

Key Specifications

Pinout & Package

TPS610992YFFT uses a 6-ball, 1.23mm × 0.88mm DSBGA (WCSP) package with bottom-side solder balls. Thermal performance is enhanced by direct die attachment to PCB via exposed PowerPAD™ connected to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS610992YFFT, TPS610994YFFT and TPS610995YFFT offer identical ultra-low IQ and package but target different fixed output voltages; none provide pin-compatible 2.5V functionality - substitution requires schematic and layout revision to match output rail requirements.

Availability

TPS610992YFFT is available at Aetrix Electronics and suitable for wearable sensor nodes, optical heart rate monitors, memory LCD bias circuits, and low-power wireless transceivers requiring stable component supply across extended production lifecycles.

Supply support for TPS610992YFFT 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 over 90 years of innovation in energy-efficient electronics.

The TPS61099x family was designed specifically for battery-powered wearables and medical sensors demanding nanoscale quiescent current, wide input range, and seamless mode transitions - addressing the core challenge of multi-year operation on single primary cells.

FAQ

What is the exact output voltage tolerance of the TPS610992YFFT?

The TPS610992YFFT delivers a fixed 2.5V output with ±0.05V (±2%) tolerance in PWM mode across –40°C to 125°C junction temperature, as specified in Section 6.5 of the SLVSD88M datasheet. This accuracy is maintained in both boost and down modes, ensuring stable bias for precision analog components without external trimming.

Does the TPS610992YFFT require external feedback resistors?

No. The TPS610992YFFT is a fixed-output variant with internal feedback divider programmed to 2.5V; the FB pin is internally connected and must remain unconnected in circuit layout. This eliminates resistor matching errors and saves board space - confirmed in Pin Functions Table 5-1 and Device Comparison Table 4.

How does the TPS610992YFFT behave when input voltage exceeds 2.5V?

When VIN rises above 2.5V, the TPS610992YFFT automatically enters down mode to regulate VOUT at 2.5V until VIN reaches VOUT + 0.5V (3.0V), then transitions to pass-through mode where VOUT follows VIN minus losses. This behavior is detailed in Section 7.3.8 and Figure 7-3 of the datasheet.

What package type and dimensions does the TPS610992YFFT use?

The TPS610992YFFT uses a 6-ball, 1.23mm × 0.88mm DSBGA (WCSP) package with 0.4mm ball pitch, as documented in Package Information and Mechanical Drawing Section 11 of SLVSD88M. The PowerPAD™ is internally connected to GND and must be soldered to a thermal pad on the PCB.

Can the TPS610992YFFT start up from a 0.7V input source?

Yes - the TPS610992YFFT guarantees startup from 0.7V input with loads lighter than 3kΩ, as stated in Section 7.1 and Figure 6-9. However, successful startup requires sufficient headroom for soft-start ramp-up; heavy loads may prevent VOUT from reaching 1.6V, halting initialization until VIN increases or load decreases.