Texas Instruments TPS610997YFFT

Overview

TPS610997YFFT from Texas Instruments is a synchronous boost converter optimized for ultra-low-power battery-powered systems, delivering fixed 5.0V output with 400nA quiescent current into VIN and 600nA into VOUT, operating from 0.7V–5.5V input, supporting up to 300mA load, and featuring true shutdown disconnection-ideal for optical heart rate monitor LED bias and memory LCD applications.

For engineers reviewing the TPS610997YFFT datasheet, TPS610997YFFT pinout, TPS610997YFFT application, or TPS610997YFFT equivalent, key selection criteria include its 5.0V fixed output accuracy (±2%), hysteretic control topology enabling 75% efficiency at 10µA load, down-mode regulation when VIN > VOUT, and WCSP package compatibility with space-constrained wearable designs.

Technical Context

The TPS610997YFFT implements a hysteretic current-mode control architecture that dynamically adjusts switching frequency based on input voltage, output voltage, and inductor value-eliminating need for external compensation while maintaining stability across 0.7V–5.5V input range. It integrates both low-side and high-side synchronous MOSFETs with R_DS(on) of 250mΩ (LS) and 350mΩ (HS) at 5.0V output.

It supports three operational modes: boost (VIN < VOUT), down mode (VIN > VOUT but ≤ VOUT + 0.5V, regulating output via PMOS gate control), and pass-through (VIN > VOUT + 0.5V, where VOUT ≈ VIN − I_OUT × (R_DCR + R_{DS(on)_HS})). Overtemperature protection triggers at 150°C with 25°C hysteresis, and undervoltage lockout activates below 0.7V with 200mV hysteresis.

Key Specifications

Pinout & Package

TPS610997YFFT uses a 6-ball, 1.23mm × 0.88mm DSBGA (WCSP) package with bottom-side thermal pad connected to GND. Pin assignment matches YFF footprint: A1=VIN, B1=SW, C1=EN, A2=GND, B2=VOUT, C2=FB (internally tied to GND for fixed-output variants).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS610997YFFT, TPS610987YFFT offers lower quiescent current but identical functionality and layout compatibility, while MAX17222ELT+T trades down-mode capability and true shutdown for slightly lower IQ and lower unit cost-making it viable only in strictly boost-limited use cases.

Availability

TPS610997YFFT is available at Aetrix Electronics and suitable for wearable fitness trackers, optical biosensors, memory LCD displays, and coin-cell–powered wireless sensor nodes requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS610997YFFT 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 specializing in analog and embedded processing technologies, with leadership in power management ICs for battery-constrained applications.

The TPS61099x product line was designed specifically for ultra-low-power portable electronics-including wearables, medical patches, and IoT edge sensors-where multi-year battery life and sub-2mm² board area are mandatory design constraints.

FAQ

What is the output voltage tolerance of the TPS610997YFFT under varying load and temperature conditions?

The TPS610997YFFT delivers a fixed 5.0V output with ±2% accuracy in PWM mode and ±3% in PFM mode across –40°C to 125°C junction temperature and full load range. At 3.7V input and 25°C, typical output is 5.00V; variation remains within ±50mV over temperature and load per Figure 6-14 in the datasheet. This tight regulation ensures reliable biasing for memory LCDs and optical sensor LEDs without external trimming.

Does the TPS610997YFFT require external feedback resistors to set its output voltage?

No, the TPS610997YFFT does not require external feedback resistors. As a fixed-output variant, its 5.0V regulation is programmed internally via EEPROM during manufacturing-pin FB is internally connected to GND. External connection to FB is unnecessary and must be avoided; leaving it unconnected or floating may cause malfunction. All external components are limited to input/output capacitors and the power inductor.

How does the TPS610997YFFT behave when input voltage exceeds 5.0V?

When VIN rises above 5.0V, the TPS610997YFFT automatically enters down mode (VIN > VOUT – 50mV) to maintain regulated 5.0V output by controlling the rectifying PMOS gate. If VIN exceeds VOUT + 0.5V, it transitions to pass-through mode where VOUT ≈ VIN − I_OUT × (R_DCR + R_{DS(on)_HS}). This eliminates need for external LDOs in systems with variable battery voltage or USB charging paths.

What is the maximum continuous output current supported by the TPS610997YFFT?

The TPS610997YFFT supports up to 300mA continuous output current when converting from 3.3V to 5.0V, achieving up to 93% efficiency at 200mA load. Its 0.8A minimum peak switch current limit provides headroom for transient pulses. Output current capability decreases at lower input voltages-for example, ~150mA is sustainable from 1.5V input-due to increased duty cycle and conduction losses.

Can the TPS610997YFFT be used with a 0.7V alkaline battery input?

Yes, the TPS610997YFFT is explicitly rated for 0.7V minimum input and can start up successfully from a single alkaline cell-even at end-of-life voltage-provided the load during startup is ≤3kΩ. Its 400nA quiescent current into VIN and hysteretic control enable stable operation down to 0.7V, making it uniquely suited for long-life alkaline-powered devices like remote controls and utility meters.