Texas Instruments TPS6521904RSMR

Overview

TPS6521904RSMR from Texas Instruments is a programmable Power Management IC (PMIC) integrating three synchronous buck converters (1×3.5A, 2×2A) and four LDOs (2×400mA, 2×300mA), designed for industrial AM62x/AM64x/AM243x SoCs requiring VDD_CORE = 0.85V, DDR4 memory support, and operation from –40°C to +105°C.

For engineers reviewing the TPS6521904RSMR datasheet, TPS6521904RSMR pinout, TPS6521904RSMR application, or TPS6521904RSMR equivalent, this page delivers verified specifications, I²C-configurable power sequencing, dynamic voltage scaling, EEPROM-programmable default voltages, and thermal performance data for industrial HMI, PLC, and video surveillance designs.

Technical Context

The TPS6521904RSMR implements quasi-fixed-frequency PWM/PFM hybrid control across all three bucks, enabling low-quiescent-current operation (250–430 µA in ACTIVE state) while supporting dynamic voltage scaling for CPU core rails. Its I²C interface (Standard/Fast/Fast+) enables real-time rail configuration and fault monitoring.

It integrates two 400mA LDOs configurable as load switches or bypass-mode regulators for SD-card I/O, plus two 300mA LDOs with load-switch capability. All four LDOs are thermally isolated and support independent enable/disable via register control or multi-function pins (MODE/STBY, EN/PB/VSENSE).

Key Specifications

Pinout & Package

TPS6521904RSMR uses a 32-pin QFN package (RSM) measuring 4.00 mm × 4.00 mm with exposed thermal pad (PGND). The package supports high-density PCB layouts and efficient thermal dissipation via direct thermal vias to internal ground planes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS6521903RSMR and TPS6521905RSMR, the TPS6521904RSMR provides out-of-box support for AM62x/AM64x/AM243x with VDD_CORE = 0.85V and DDR4, reducing bring-up time and eliminating need for EEPROM reprogramming or complex I²C initialization sequences.

Availability

TPS6521904RSMR is available at Aetrix Electronics and suitable for industrial HMI, PLC, and video surveillance applications requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for TPS6521904RSMR 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 over 50 years of industrial-grade product experience.

The TPS65219 family was engineered specifically for scalable, low-risk power delivery in TI's AM62x/AM64x/AM243x industrial SoC platforms-emphasizing EEPROM-configurable sequencing, thermal resilience, and multi-PMIC coordination.

FAQ

What is the default VDD_CORE voltage configured in TPS6521904RSMR?

The TPS6521904RSMR is factory-programmed with VDD_CORE = 0.85V, matching the recommended operating point for AM62x, AM64x, and AM243x SoCs with DDR4 memory. This value is stored in non-volatile EEPROM and can be modified via I²C if required. The TPS6521904RSMR does not require external configuration to deliver this voltage at power-up.

Does TPS6521904RSMR support SD-card I/O voltage switching?

Yes, TPS6521904RSMR supports SD-card I/O voltage switching through the VSEL_SD function on Pin 12 (VSEL_SD/VSEL_DDR). When configured as VSEL_SD, it triggers dynamic voltage changes between 1.8V and the register-configured output of LDO1 or LDO2-enabling compliance with SDIO 3.0/4.0 standards without external logic.

What package type and dimensions does TPS6521904RSMR use?

TPS6521904RSMR uses the RSM package: a 32-pin QFN measuring 4.00 mm × 4.00 mm with an exposed thermal pad (PGND). This compact footprint supports high-density industrial PCB layouts while delivering RΘJB = 10.5°C/W thermal performance with standard 2-layer board construction and four thermal vias.

Can TPS6521904RSMR operate across the full industrial temperature range?

Yes, TPS6521904RSMR is fully specified and tested for continuous operation from –40°C to +105°C ambient temperature. Its internal thermal protection, UVLO/OVP thresholds, and buck converter stability are validated across this range-making it suitable for uncontrolled cabinet environments in PLCs, HMIs, and building automation systems.

How does TPS6521904RSMR handle power sequencing for multi-rail SoCs?

TPS6521904RSMR implements programmable power sequencing via internal state machine and EEPROM-stored timing parameters. It supports precise ramp-up/ramp-down delays, inter-rail dependencies, and fault-triggered shutdown-all configurable over I²C. Sequencing is autonomous after initial setup, eliminating host processor involvement during boot.