Texas Instruments TPS65054RSMT

Overview

TPS65054RSMT from Texas Instruments is a 6-channel power-management IC integrating two 600-mA step-down converters (DCDC1 for I/O, DCDC2 for core) and four low-input-voltage LDOs (two 400-mA and two 200-mA), designed for single-cell Li-Ion/Li-Polymer systems in portable processors. It supports digital voltage selection for DCDC2 (1.05 V / 1.3 V) and all four LDOs, operates at 2.25 MHz fixed frequency, and features power-save mode with 32-μA quiescent current for both converters.

For engineers reviewing the TPS65054RSMT datasheet, TPS65054RSMT pinout, TPS65054RSMT application, or TPS65054RSMT equivalent, key selection considerations include its dual-buck + quad-LDO architecture, 2.5–6-V input range for DC-DC stages, 1.5–6.5-V LDO input support, 180° out-of-phase switching, ±1% output accuracy in PWM mode, and VQFN-32 (4 mm × 4 mm) thermal-pad package.

Technical Context

The TPS65054RSMT implements two synchronous buck converters with integrated high-side/low-side MOSFETs (r_DS(on) ≤630 mΩ P-ch, ≤450 mΩ N-ch), fixed 2.25-MHz oscillator, and selectable PFM/PWM operation via MODE pin. DCDC2 output is digitally set to 1.05 V (DEFDCDC2 = high) or 1.3 V (DEFDCDC2 = low).

All four LDOs feature high PSRR (70 dB @ 10 kHz), adjustable or fixed outputs via DEFLDO[1–4] pins, dropout voltages as low as 280 mV (LDO2 @ 400 mA), and independent enable control. The device includes dedicated PGND1/PGND2, analog/digital ground separation, and thermal shutdown at 140°C with 20°C hysteresis.

Key Specifications

Pinout & Package

TPS65054RSMT uses a 32-pin VQFN package (4.00 mm × 4.00 mm) with exposed thermal pad soldered to PCB ground for thermal management. Pin count, layout, and thermal pad connection are critical for achieving rated 0.95 W power dissipation at 70°C ambient.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power-management IC applications.

Compared with TPS65050RSMT and TPS65056RSMT, the TPS65054RSMT uniquely combines externally adjustable DCDC1 (via FB_DCDC1) with digitally selectable DCDC2 (1.05 V/1.3 V) and fully programmable LDO outputs-making it optimal for designs requiring both I/O rail flexibility and core voltage agility.

Availability

TPS65054RSMT is available at Aetrix Electronics and suitable for smartphone, WLAN module, and portable media player designs requiring stable component supply, long-term lifecycle support, and full traceability for production ramp.

Supply support for TPS65054RSMT 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 decades of expertise in battery-powered system solutions.

The TPS6505x product line was engineered specifically for single-cell Li-Ion/Li-Polymer portable systems requiring highly integrated, low-quiescent-current power sequencing across processor, memory, and peripheral domains.

FAQ

What is the maximum supported input voltage for the TPS65054RSMT DC-DC converters?

The TPS65054RSMT DC-DC converters accept an input voltage range of 2.5 V to 6 V on the VINDCDC1/2 pin. This accommodates standard Li-Ion (2.7–4.2 V) and boosted battery rails. Exceeding 6 V risks permanent damage, as specified in the Absolute Maximum Ratings table.

How does the TPS65054RSMT configure its DCDC2 output voltage?

The TPS65054RSMT configures DCDC2 output voltage digitally using the DEFDCDC2 pin: logic high selects 1.05 V, logic low selects 1.3 V. This eliminates external resistor dividers and enables firmware-controlled core voltage selection during runtime or boot.

Can the TPS65054RSMT operate with only one DC-DC converter enabled?

Yes, the TPS65054RSMT supports independent enable control via EN_DCDC1 and EN_DCDC2. Either converter can be disabled while the other remains active, allowing partial power delivery-for example, powering only the I/O rail during low-power wake-up events.

What is the purpose of the MODE pin on the TPS65054RSMT?

The MODE pin on the TPS65054RSMT selects between power-save mode (PFM at light loads, PWM at heavy loads) when pulled low, and forced fixed-frequency PWM operation when pulled high-reducing output ripple and EMI sensitivity in noise-critical analog sections.

Does the TPS65054RSMT include thermal protection?

Yes, the TPS65054RSMT incorporates thermal shutdown that activates at 140°C junction temperature, with 20°C hysteresis. Once triggered, the device disables all regulators until temperature falls below 120°C, protecting against sustained overtemperature conditions.