Texas Instruments TPS61040DRVTG4

Overview

TPS61040DRVTG4 from Texas Instruments is a high-frequency DC-DC boost converter optimized for LCD bias and white LED backlight supplies, featuring 1.8V–6V input range, up to 28V adjustable output, 400mA internal switch current limit, 28μA typical quiescent current, and operation in WSON-6 package for space-constrained portable displays.

For engineers reviewing the TPS61040DRVTG4 datasheet, TPS61040DRVTG4 pinout, TPS61040DRVTG4 application, or TPS61040DRVTG4 equivalent, key selection criteria include its PFM-controlled discontinuous conduction mode, thermal shutdown at 168°C, undervoltage lockout at 1.5V, soft-start sequence, and compatibility with ceramic/tantalum output capacitors in compact layouts.

Technical Context

The TPS61040DRVTG4 employs peak-current-mode pulse-frequency modulation (PFM) with constant 400mA current limit and 6μs maximum on-time, enabling stable regulation across 1.8V–6V inputs while maintaining >70% efficiency from 0.1mA to 100mA load. Its internal 1.233V reference and feedback loop respond to voltage divider networks to set output up to 28V.

It integrates an N-channel MOSFET with 600mΩ typical R_DS(on) at 2.4V input, supports minimum off-time of 400ns, and includes undervoltage lockout (1.5V threshold), thermal shutdown (168°C, 25°C hysteresis), and enable-controlled shutdown drawing <1μA.

Key Specifications

Pinout & Package

TPS61040DRVTG4 uses the DRV (WSON-6) package: 2mm × 2mm × 0.8mm body with exposed thermal pad soldered to PCB ground plane for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61040DRVTG4, TPS61041DRVT offers lower peak current and reduced EMI at the cost of 30% less max output power, while MT3608EN delivers higher current and input range but sacrifices battery-optimized features like 28μA I_Q, soft start, and thermal protection-making it unsuitable for portable Li-ion systems without redesign.

Availability

TPS61040DRVTG4 is available at Aetrix Electronics and suitable for LCD bias supply, white LED backlighting, and digital still camera power applications requiring stable component supply, long-term manufacturability, and automotive-grade reliability screening.

Supply support for TPS61040DRVTG4 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 broad industrial, automotive, and consumer design support.

The TPS6104x product line was designed specifically for space- and power-constrained portable displays, delivering high-efficiency boost conversion in sub-2mm² WSON packages for LCD bias and LED backlight applications.

FAQ

What is the maximum output voltage supported by the TPS61040DRVTG4?

The TPS61040DRVTG4 supports an adjustable output voltage range up to 28V, set by an external resistor divider connected to the FB pin. This is achieved using the internal 1.233V reference voltage and is validated across the full operating temperature range (–40°C to +85°C) and input voltage range (1.8V to 6V). Output voltages above 28V are not supported and may violate absolute maximum ratings on the SW pin.

Does the TPS61040DRVTG4 require an external feedforward capacitor for stable operation?

Yes, the TPS61040DRVTG4 requires a feedforward capacitor (C_FF) across the upper feedback resistor (R1) to ensure stable single-pulse operation and minimize output voltage ripple. Without C_FF, the device exhibits double-pulsing or burst-mode behavior at light loads, increasing ripple. A typical starting value is 10pF, scaled per the formula C_FF = 1/(2π·f_S·20·R1), where f_S is the nominal switching frequency.

What package type does the TPS61040DRVTG4 use, and how is thermal management handled?

The TPS61040DRVTG4 uses the DRV package: a 6-pin WSON (2mm × 2mm × 0.8mm) with an exposed thermal pad. Thermal management requires soldering the thermal pad directly to a PCB copper pour tied to system ground. This achieves R_θJB = 52.9°C/W and R_θJC(bot) = 26.9°C/W, enabling reliable operation up to 125°C junction temperature under continuous 400mA switch current.

Can the TPS61040DRVTG4 operate from a 1.5V input source?

No, the TPS61040DRVTG4 cannot operate from a 1.5V input source. Its undervoltage lockout (UVLO) activates below a typical 1.5V threshold (min 1.5V, max 1.7V), disabling switching to prevent malfunction. The guaranteed operating input range starts at 1.8V, and performance parameters-including efficiency, output regulation, and current limit-are specified only from 1.8V to 6V.

How does the soft-start function work in the TPS61040DRVTG4?

The TPS61040DRVTG4 implements a two-stage soft-start that limits inrush current by progressively increasing the internal current limit: first to ILIM/4 for 256 switching cycles, then to ILIM/2 for another 256 cycles, before reaching full 400mA current limit. This staged ramp prevents input rail collapse during startup and eliminates need for external soft-start circuitry, especially critical in battery-powered systems with limited source impedance.