Texas Instruments TPS61260DRVT

Overview

TPS61260DRVT from Texas Instruments is a synchronous boost DC-DC converter IC designed for ultra-low-input-voltage battery-powered systems. It operates from 0.8 V to 4.0 V input, delivers up to 100 mA output current at 3.3 V, supports adjustable output voltage (1.8–4.0 V), features 29-µA quiescent current, and uses a 2.00 × 2.00 mm WSON-6 package - enabling compact coin-cell or single-alkaline designs for portable medical and wearable electronics.

For engineers reviewing the TPS61260DRVT datasheet, TPS61260DRVT pinout, TPS61260DRVT application, or TPS61260DRVT equivalent, key selection criteria include its programmable average output current (10–100 mA), quasi-fixed 2.5-MHz switching frequency, load disconnect during shutdown, output overvoltage protection, and compatibility with high-impedance batteries such as CR2032.

Technical Context

The TPS61260DRVT implements a current-mode, quasi-fixed-frequency PWM controller with synchronous rectification using three internal N-channel MOSFETs. Its dual-loop architecture regulates either output voltage or average output current - whichever demands lower power - via independent feedback paths: FB pin (500 mV reference) for voltage control and RI pin (400 mV reference) for current programming.

It integrates advanced softstart, undervoltage lockout (0.7 V threshold with 200 mV hysteresis), and Power Save Mode that reduces switching frequency under light loads while maintaining regulation via a low-power comparator. Startup behavior includes linear-mode operation when VIN > VOUT and seamless transition to synchronous boost above ~1.8 V output.

Key Specifications

Pinout & Package

TPS61260DRVT is housed in a thermally enhanced 2.00 × 2.00 mm, 6-pin WSON (DRV) package with an exposed thermal pad that must be soldered to GND for reliable power dissipation and mechanical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61260DRVT, TPS61291DRVR offers superior quiescent current but sacrifices programmability and protection features, while MAX17222ELT+T extends input range downward at the cost of integrated safety functions and higher layout sensitivity.

Availability

TPS61260DRVT is available at Aetrix Electronics and suitable for portable medical devices, wireless audio accessories, industrial handheld meters, and laser pointer modules requiring stable component supply across long production lifecycles.

Supply support for TPS61260DRVT 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 and embedded processing technologies, with decades of expertise in power management IC design and high-volume manufacturing reliability.

The TPS6126x product line was engineered specifically for ultra-low-input-voltage battery-powered applications - prioritizing efficiency at micropower loads, robustness with high-impedance sources (e.g., coin cells), and integration of protection features essential for consumer and medical end equipment.

FAQ

What is the minimum input voltage required for TPS61260DRVT to start up and regulate?

The TPS61260DRVT has a startup undervoltage lockout (UVLO) threshold of 1.2 V (typical, falling) with 200 mV hysteresis. While it can operate down to 0.8 V once running, the device will not initiate startup unless VIN rises above ~1.2 V. This ensures reliable turn-on from partially discharged alkaline or NiMH cells without erratic behavior.

How do I configure TPS61260DRVT for a 2.5 V output voltage?

To set TPS61260DRVT to 2.5 V, connect a resistor divider between VOUT, FB, and GND. With FB reference = 500 mV, use R2 = 100 kΩ (to ground) and R1 = 300 kΩ (between VOUT and FB), per Equation 1: R1 = R2 × (VOUT/VFB − 1). Ensure total divider current ≥1 µA and R1 + R2 ≤1 MΩ for optimal accuracy and noise immunity.

Can TPS61260DRVT drive an LED with constant current without external sensing?

Yes - TPS61260DRVT supports true constant-current regulation via its RI pin. Connect a resistor between RI and GND (e.g., 10 kΩ for ~20 mA average output current) to program the regulated current. The IC then maintains that current regardless of forward voltage changes, making it suitable for LED or laser diode biasing without added components.

Does TPS61260DRVT provide reverse current protection during shutdown?

Yes - TPS61260DRVT includes active load disconnect during shutdown. When EN is pulled low, internal switches isolate VOUT from VIN, preventing reverse current flow from the output capacitor back into the battery. This feature preserves battery charge and protects weak input sources like coin cells during extended standby periods.

What thermal considerations apply to TPS61260DRVT in a 2.00 × 2.00 mm WSON package?

TPS61260DRVT has RθJA = 89°C/W and requires the exposed thermal pad to be soldered to a solid GND plane for effective heat dissipation. At 100 mA output with 1.2 V input and 3.3 V output, power dissipation is ~210 mW; without proper thermal relief, junction temperature could exceed 125°C. Use ≥2 cm² copper area under the pad and multiple thermal vias to maintain safe operating temperature.