Texas Instruments TPS6521902RSMR

Overview

TPS6521902RSMR from Texas Instruments is a programmable power management IC (PMIC) engineered for industrial SoCs including AM62x and AM64 processors. It integrates three synchronous buck converters (1×3.5A, 2×2A) and four LDOs (2×400mA, 2×300mA), supports dynamic voltage scaling, I²C-based sequencing, and operates across –40°C to +105°C for HMI, PLC, and industrial PC applications.

For engineers reviewing the TPS6521902RSMR datasheet, TPS6521902RSMR pinout, TPS6521902RSMR application, or TPS6521902RSMR equivalent, key selection criteria include its RSM 32-pin QFN package, EEPROM-programmable rail voltages, multi-PMIC configuration support, and configurable GPIO/GPO timing control for industrial SoC power sequencing.

Technical Context

The TPS6521902RSMR implements quasi-fixed-frequency PWM/low-I_Q PFM operation with dynamic voltage scaling on all three bucks, enabling efficient load-transient response and adaptive power delivery. Its I²C interface (standard/fast/fast-mode+) allows real-time register access for sequencing, monitoring, and fault handling.

It features two 400mA LDOs supporting bypass mode and SD-card voltage switching via VSEL_SD/VSEL_DDR, plus two 300mA LDOs configurable as load switches. The device uses internal EEPROM to store default rail configurations and supports multi-PMIC synchronization via GPIO and MODE/STBY pins.

Key Specifications

Pinout & Package

RSM package: 32-pin QFN, 4.00mm × 4.00mm, exposed thermal pad (PGND) for enhanced thermal dissipation in compact industrial layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS6521901RSMR and TPS6521905RSMR, the TPS6521902RSMR offers factory-programmed LPDDR4 support out-of-box while retaining partial EEPROM reconfigurability-making it optimal for AM62x/AM64-based industrial designs prioritizing rapid deployment and SD-card interoperability.

Availability

TPS6521902RSMR is available at Aetrix Electronics and suitable for industrial HMI, PLC, and video surveillance systems requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for TPS6521902RSMR 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 delivers integrated, EEPROM-configurable power solutions for TI's AM62x/AM64x/AM243x processors-designed specifically to simplify power architecture in space-constrained, thermally demanding industrial edge devices.

FAQ

What is the primary application target for the TPS6521902RSMR?

The TPS6521902RSMR is specifically configured for industrial applications using AM62x and AM64x processors with LPDDR4 memory, including HMIs, PLCs, industrial PCs, and video surveillance systems. Its factory-programmed default settings-VDD_CORE = 0.75V, LPDDR4 I/O = 1.1V, and SD-card support via VSEL_SD-align directly with TI's AM62x/AM64x power reference designs. This eliminates manual configuration for standard deployments while retaining EEPROM programmability for fine-tuning.

Does the TPS6521902RSMR support dynamic voltage scaling (DVS)?

Yes, the TPS6521902RSMR supports dynamic voltage scaling on all three buck converters via I²C commands. This allows real-time adjustment of output voltages-such as lowering VDD_CORE from 0.85V to 0.75V during low-activity states-to reduce dynamic power consumption. DVS is implemented in hardware with minimal latency and does not require host firmware intervention beyond register writes, making it suitable for real-time industrial control loops.

How does the TPS6521902RSMR handle SD-card voltage selection?

The TPS6521902RSMR uses the VSEL_SD/VSEL_DDR pin to dynamically switch LDO1 or LDO2 output between 1.8V and a register-configured voltage (e.g., 3.3V) during operation-enabling compliance with UHS-I and UHS-II SD specifications. This function is hardware-automated: asserting VSEL_SD triggers an internal state machine that reconfigures the LDO feedback network without I²C traffic, ensuring glitch-free transitions critical for reliable SD card enumeration and data transfer.

What package and thermal characteristics does the TPS6521902RSMR have?

The TPS6521902RSMR uses the RSM 32-pin QFN package (4.00mm × 4.00mm) with an exposed thermal pad (PGND). Its junction-to-board thermal resistance (R_ΘJB) is 10.5°C/W, enabling effective heat dissipation into the PCB ground plane via multiple vias under the pad. This thermal design supports continuous 3.5A buck operation at +105°C ambient without forced airflow-validated per JEDEC JESD51-7 standards and essential for fanless industrial enclosures.

Can the TPS6521902RSMR be used in multi-PMIC configurations?

Yes, the TPS6521902RSMR supports synchronized multi-PMIC operation using GPIO and MODE/STBY pins to coordinate power-up/down sequencing across two devices. This enables systems requiring more than 14 rails-such as high-channel industrial data concentrators or modular PLC backplanes-while maintaining deterministic timing and avoiding rail contention. Synchronization is achieved through level-sensitive signaling, eliminating need for external timing controllers or complex firmware coordination.