Texas Instruments TPS61288LRQQR

Overview

TPS61288LRQQR from Texas Instruments is a fully integrated synchronous boost converter in a 2.5-mm × 3.0-mm HotRod™ QFN-11 package, delivering up to 15-A peak switch current, supporting 2.0–18-V input and 4.5–18-V output, and operating at 500-kHz fixed switching frequency for high-power portable systems such as USB Type-C PD and LCD source drivers.

For engineers reviewing the TPS61288LRQQR datasheet, TPS61288LRQQR pinout, TPS61288LRQQR application, or TPS61288LRQQR equivalent, key selection considerations include its 6.5-mΩ low-side / 8.5-mΩ high-side MOSFETs, 19-V overvoltage protection, SOO modulation for seamless PWM/PFM transition, and thermal shutdown at 160°C - all critical for high-efficiency, space-constrained boost designs.

Technical Context

The TPS61288LRQQR employs peak current control with Smooth On-time/Off-time (SOO) modulation to maintain stable regulation across wide VIN/VOUT/load ranges while minimizing output ripple. It operates in quasi-constant-frequency PWM mode under moderate-to-heavy loads and transitions automatically to PFM at light load without DC offset between modes.

Its internal architecture integrates dual power MOSFETs (6.5-mΩ LS, 8.5-mΩ HS), a 0.6-V feedback reference, external loop compensation via COMP pin, and cycle-by-cycle overcurrent protection triggered at 15-A typical peak switch current - enabling robust transient response and design flexibility with varied inductor/capacitor selections.

Key Specifications

Pinout & Package

The TPS61288LRQQR is housed in an 11-pin RQQ VQFN package (2.5 mm × 3.0 mm) with exposed thermal pad, optimized for high-density PCB layouts and enhanced thermal performance via HotRod™ flip-chip interconnects.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61282DRQQR and MAX20499AATG+T, the TPS61288LRQQR delivers highest peak current (15 A) and widest input range (2.0–18 V) in the smallest thermally enhanced package - making it optimal for space- and power-critical portable boost applications where analog simplicity and maximum output capability are required.

Availability

TPS61288LRQQR is available at Aetrix Electronics and suitable for Bluetooth speaker power stages, USB Type-C PD sink implementations, and LCD source driver supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS61288LRQQR 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 ICs, with decades of expertise in high-efficiency DC/DC conversion and battery-powered system solutions.

The TPS61288LRQQR belongs to TI's high-current synchronous boost converter product line, engineered specifically for compact, high-power portable electronics demanding minimal external components, superior thermal performance, and robust protection in aggressive duty cycles.

FAQ

What is the minimum input voltage required for TPS61288LRQQR to start switching?

The TPS61288LRQQR requires a minimum rising input voltage of 2.4 V to initiate switching, enforced by its undervoltage lockout (UVLO) circuit. The falling UVLO threshold is 1.9 V with 400-mV hysteresis, preventing oscillation near cutoff. This ensures reliable startup from partially discharged single-cell Li-ion batteries while avoiding deep discharge damage.

Does TPS61288LRQQR support automatic transition between PWM and PFM modes?

Yes, the TPS61288LRQQR implements Smooth On-time/Off-time (SOO) modulation to enable seamless, offset-free transition between PWM and PFM modes based on load conditions. At light loads, it extends off-time while maintaining regulation accuracy and low output ripple - a key advantage over conventional adaptive off-time converters that exhibit voltage droop or ripple spikes during mode switching.

What is the purpose of the COMP pin on TPS61288LRQQR, and how is it used?

The COMP pin on TPS61288LRQQR is the output of the internal error amplifier and serves as the node for external loop compensation. Designers connect an RC network between COMP and AGND to set gain crossover frequency and phase margin, enabling stable operation with various inductor values (1–4.7 µH) and output capacitors. This flexibility allows optimization for transient response, EMI, or size constraints without changing the IC.

How does the thermal shutdown protection work in TPS61288LRQQR?

The TPS61288LRQQR activates thermal shutdown at a junction temperature of 160°C (typical), halting switching until the die cools to approximately 140°C (20°C hysteresis). This protects the internal MOSFETs and control circuitry from permanent damage during sustained overload or inadequate PCB thermal relief. The RQQ package's exposed thermal pad must be soldered to a large copper area to ensure effective heat transfer and delay trip timing.

Can TPS61288LRQQR be used with input voltages above 12 V, such as 15 V or 18 V?

Yes, the TPS61288LRQQR supports input voltages up to 18 V continuously, as specified in its absolute maximum rating and recommended operating conditions. It maintains full functionality - including 500-kHz switching, 15-A current limiting, and OVP - across the entire 2.0–18-V input range, making it suitable for industrial backup supplies, wide-range adapter inputs, and dual-battery systems where input may exceed typical Li-ion voltages.