Texas Instruments TPS61003DGSR

Overview

TPS61003DGSR from Texas Instruments is a fixed-output 2.8 V, non-synchronous boost converter designed for single- or dual-cell battery systems. It delivers up to 250 mA output current from 1.8 V input, starts up into full load at 0.8 V, achieves up to 90% efficiency, and integrates low-battery detection (LBI/LBO) for system-level power management in portable electronics.

For engineers reviewing the TPS61003DGSR datasheet, TPS61003DGSR pinout, TPS61003DGSR application, or TPS61003DGSR equivalent, key selection criteria include minimum start-up voltage (0.8 V), fixed 2.8 V output accuracy (±3.5% over temp/load), integrated antiringing switch for EMI reduction, and MSOP-10 package compatibility with space-constrained battery-powered designs.

Technical Context

The TPS61003DGSR uses a fixed-frequency (500 kHz nominal), current-mode PWM controller with automatic transition to power-save mode below ~10 mA load to sustain high efficiency across wide output current range. Its internal 1.1 A switch current limit and integrated UVLO (0.7 V threshold) ensure robust start-up and brownout protection.

It implements an antiringing comparator that clamps SW-node voltage to VBAT during discontinuous conduction mode, suppressing inductor/diode parasitic ringing without external snubbers. The LBI/LBO circuit provides programmable low-battery warning via external resistor divider, with 500 mV ±15 mV threshold and 10 mV hysteresis.

Key Specifications

Pinout & Package

TPS61003DGSR is housed in a 10-pin VSSOP (DGS) package, 3.00 mm × 3.00 mm body size, with exposed thermal pad (not electrically connected). Pin numbering follows standard top-view orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61003DGSR, TPS61022RGET offers higher current and frequency at the expense of quiescent current (25 µA vs. 44 µA) and pin compatibility, while MAX77801EWA+T adds programmability and integration but increases design complexity and cost - making TPS61003DGSR the most balanced choice for cost-sensitive, space-constrained, single-rail 2.8 V battery applications.

Availability

TPS61003DGSR is available at Aetrix Electronics and suitable for wireless headsets, remote controls, portable medical sensors, and pagers requiring stable component supply, long battery life, and compact packaging.

Supply support for TPS61003DGSR 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-operated systems.

The TPS6100x product line was engineered specifically for low-voltage, high-efficiency boost conversion in single- and dual-cell portable electronics - prioritizing ultra-low start-up voltage, integrated system supervision, and minimal external component count.

FAQ

What is the minimum input voltage required for TPS61003DGSR to start up and regulate?

The TPS61003DGSR starts up and regulates into full load at a minimum input voltage of 0.8 V over the full temperature range (–40°C to 85°C). This specification is verified per TI SLVS279D datasheet Section 7.5, enabling reliable operation deep into alkaline or NiMH battery discharge curves. Below 0.8 V, the device remains in UVLO and will not initiate switching. The TPS61003DGSR maintains regulation down to 0.8 V once started.

Does TPS61003DGSR require external feedback resistors to set its output voltage?

No, the TPS61003DGSR does not require external feedback resistors. It is a fixed-output variant with an internally trimmed 2.8 V regulator. Per datasheet Section 6 (Pin Functions), the FB pin (Pin 3) must be left unconnected - connecting external resistors would conflict with the internal divider and cause regulation error. The output voltage tolerance is ±3.5% over temperature and load, as specified in Section 7.5.

How does the low-battery detection feature work on TPS61003DGSR?

The TPS61003DGSR implements low-battery detection using the LBI and LBO pins. LBI (Pin 9) accepts a scaled battery voltage; when it falls below 500 mV ±15 mV, the open-drain LBO (Pin 10) pulls low. A pull-up resistor to VOUT is required on LBO. If unused, LBI must be tied to GND - floating LBI causes undefined behavior. This function is active only when EN is high.

What package type and dimensions does TPS61003DGSR use?

The TPS61003DGSR uses the 10-pin VSSOP (DGS) package, with nominal body dimensions of 3.00 mm × 3.00 mm and 0.5 mm lead pitch. It features an exposed thermal pad (non-functional, no electrical connection). This package is distinct from MSOP - though often colloquially referenced as MSOP-10, TI officially designates it as VSSOP per the Mechanical Data section (Section 14) of SLVS279D.

Can TPS61003DGSR be used with a single-cell alkaline battery?

Yes, the TPS61003DGSR is explicitly designed for single-cell alkaline battery operation. Its 0.8 V start-up voltage and ability to regulate down to 0.8 V input align with the discharge profile of alkaline cells, which typically deliver 1.5 V fresh and fall to ~0.8 V at end-of-life. TI's Application Note SLVS279D Section 10.1 confirms suitability for "single- or dual-cell, primary and secondary alkaline battery cells."