Texas Instruments TPS65054RSMTG4

Overview

TPS65054RSMTG4 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, two 200-mA), all with independent enable control and digital voltage selection. It operates from a single Li-Ion cell (2.5 V–6 V input), supports 2.25-MHz fixed-frequency or PFM/PWM hybrid mode, and targets space-constrained portable processors.

For engineers reviewing the TPS65054RSMTG4 datasheet, TPS65054RSMTG4 pinout, TPS65054RSMTG4 application, or TPS65054RSMTG4 equivalent, key selection criteria include dual-buck current capability, LDO voltage programmability via DEFLDO[1–4], MODE pin-controlled efficiency optimization, and VQFN-32 (4 mm × 4 mm) thermal-pad package compatibility with high-density PCB layouts.

Technical Context

The TPS65054RSMTG4 implements two synchronous buck converters with 180° out-of-phase switching to reduce input ripple, each featuring 2.25-MHz oscillator, ±1% output accuracy in PWM mode, and 100% duty-cycle capability for ultra-low dropout. Its LDO subsystem includes two 400-mA high-PSRR regulators (LDO1/LDO2) and two 200-mA variants (LDO3/LDO4), all supporting 1.5 V–6.5 V input and digitally selectable default outputs.

Control logic enables precise power sequencing: EN_DCDC1/EN_DCDC2 and EN_LDO[1–4] pins allow external timing control, while DEFDCDC2 selects DCDC2 output between 1.05 V (high) and 1.3 V (low). The MODE pin toggles between power-save (PFM at light load) and forced-PWM operation, and the integrated 32-ms debounce flip-flop on PB_OUT supports robust push-button ON/OFF functionality.

Key Specifications

Pinout & Package

TPS65054RSMTG4 uses a 32-pin VQFN package (4.00 mm × 4.00 mm) with exposed thermal pad (connected to GND). Pin functions are fully defined per TI SLVS710C Rev C datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65054RSMTG4, TPS65050RSMT offers simpler LDO setup but less flexibility, while TPS65056RSMT provides fixed DCDC1 stability at the cost of added external components for LDO tuning-making TPS65054RSMTG4 optimal for designs prioritizing digital configurability and compactness.

Availability

TPS65054RSMTG4 is available at Aetrix Electronics and suitable for smartphone baseband power, OMAP application processor supply, portable media player systems, and Samsung S3C24xx embedded designs requiring stable component supply across long production lifecycles.

Supply support for TPS65054RSMTG4 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, signal chain, and microcontroller solutions.

The TPS6505x family was designed specifically for single-cell Li-Ion/Li-Polymer powered portable electronics, integrating multiple DC-DC and LDO rails to simplify power architecture for processors like OMAP, TMS320 DSP, and Samsung S3C24xx.

FAQ

What is the maximum output current supported by each DC-DC converter in the TPS65054RSMTG4?

The TPS65054RSMTG4 supports 600 mA per DC-DC converter (DCDC1 and DCDC2). This is confirmed in the Device Options table and Electrical Characteristics section of the SLVS710C datasheet. The 600-mA rating applies under recommended operating conditions (VINDCDC1/2 = 2.5 V to 6 V, TA = –40°C to 85°C) and is validated across the full input voltage range with appropriate external components (2.2-μH inductor, 10–22-μF output capacitor).

How does the DEFDCDC2 pin configure the output voltage of DCDC2 in the TPS65054RSMTG4?

In the TPS65054RSMTG4, the DEFDCDC2 pin selects DCDC2 output voltage: logic high sets 1.05 V, logic low sets 1.3 V. This is explicitly stated in the Pin Functions table for TPS65054 and differs from other family members (e.g., TPS65052 uses 1.0 V/1.3 V). No external resistors are needed-voltage selection is internal and digital, simplifying design for core-rail flexibility.

Does the TPS65054RSMTG4 support power sequencing, and how is it implemented?

Yes, the TPS65054RSMTG4 supports full power sequencing via dedicated enable pins: EN_DCDC1, EN_DCDC2, EN_LDO1, EN_LDO2, EN_LDO3, and EN_LDO4 are all active-high and independently controllable. This allows external logic or microcontroller GPIOs to assert enables in precise order-critical for OMAP and S3C24xx processors that require specific voltage ramp sequences to avoid latch-up or initialization failure.

What is the purpose of the MODE pin on the TPS65054RSMTG4, and how does it affect efficiency?

The MODE pin on the TPS65054RSMTG4 selects between Power Save Mode (PFM at light load, PWM at heavy load) when low, and forced PWM Mode when high. In Power Save Mode, quiescent current drops to 32 μA (both DC-DC active), maximizing light-load efficiency; forced PWM ensures constant frequency and lower output ripple during active processing, trading efficiency for noise performance. This dual-mode capability is documented in the Features and Pin Functions sections.

Can the TPS65054RSMTG4 be used with a single Li-Ion battery, and what is its minimum input voltage?

Yes, the TPS65054RSMTG4 is explicitly designed for single Li-Ion or Li-Polymer cells, with a minimum input voltage of 2.5 V on VINDCDC1/2. This meets the discharge cutoff of standard 3.7-V nominal cells (which drop to ~2.7–3.0 V under load). The device maintains regulation down to 2.5 V input while delivering full 600-mA DC-DC output and supporting LDO operation from 1.5 V input-ensuring robust operation across the full battery discharge curve.