Texas Instruments TPS6521906RSMR

Overview

TPS6521906RSMR 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) for industrial SoC power delivery. It supports dynamic voltage scaling, I²C-based sequencing, EEPROM configuration, and operates across –40°C to +105°C ambient temperature - enabling robust power management in AM62x/AM64x-based HMIs and PLCs.

For engineers reviewing the TPS6521906RSMR datasheet, TPS6521906RSMR pinout, TPS6521906RSMR application, or TPS6521906RSMR equivalent, key selection criteria include its RSM 32-pin QFN package (4.0 mm × 4.0 mm), configurable rail voltages (0.6–3.4 V for bucks/LDO1–LDO2; 1.2–3.3 V for LDO3–LDO4), low-quiescent-current PFM/PWM operation, and multi-PMIC support for systems requiring >14 rails.

Technical Context

The TPS6521906RSMR implements three independent buck regulators with integrated high-side/low-side FETs, supporting up to 2.3 MHz switching frequency and dynamic voltage scaling via I²C. Each buck uses dual switch pins (e.g., LX_B1_1/LX_B1_2) and dedicated feedback inputs (FB_B1–FB_B3) for precise output regulation.

Its four LDOs are functionally partitioned: LDO1/LDO2 accept 1.5–5.5 V input and support bypass-mode load-switch operation for SD-card interfaces; LDO3/LDO4 accept 2.2–5.5 V input and offer fixed 1.2–3.3 V outputs with optional load-switch capability. All rails are configured via EEPROM and controlled through a standard/fast-mode+/I²C interface.

Key Specifications

Pinout & Package

RSM package: 32-pin QFN, 4.0 mm × 4.0 mm body, 0.4 mm pitch, thermally enhanced with exposed PGND pad. Requires minimum 6 vias under thermal pad for optimal thermal performance per TI design guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS6521905RSMR and TPS6521904RSMR, the TPS6521906RSMR provides identical hardware and thermal performance but ships with a distinct EEPROM configuration optimized for specific industrial SoC variants - enabling faster system integration without I²C bring-up.

Availability

TPS6521906RSMR is available at Aetrix Electronics and suitable for industrial HMIs, PLC mainboards, and video surveillance NVRs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for production programs.

Supply support for TPS6521906RSMR 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 industrial-grade reliability validation.

The TPS65219 family is designed specifically for powering next-generation industrial SoCs like AM62x and AM64x, emphasizing configurability, thermal robustness, and multi-rail coordination in space-constrained environments.

FAQ

What is the package type and thermal pad requirement for TPS6521906RSMR?

The TPS6521906RSMR uses the RSM 32-pin QFN package (4.0 mm × 4.0 mm). It features an exposed thermal pad (PGND) that must be soldered to a continuous PCB ground plane using at least six thermal vias to ensure junction-to-board thermal resistance remains ≤10.5°C/W and prevent thermal throttling under full load.

Does TPS6521906RSMR support dynamic voltage scaling for all buck converters?

Yes, the TPS6521906RSMR supports real-time dynamic voltage scaling on all three buck converters via its I²C interface. Each buck's output voltage can be adjusted in 25 mV steps (0.6–1.4 V) or 100 mV steps (1.4–3.4 V) while operating - enabling precise DVFS control for AM62x/AM64x CPU and GPU domains.

How does the EN/PB/VSENSE pin function in TPS6521906RSMR?

The EN/PB/VSENSE pin on the TPS6521906RSMR is a multi-function terminal configurable as enable (high-active), push-button monitor (600 ms low = ON, 8 s low = OFF), or power-fail comparator input. Its edge- or level-sensitive behavior depends on configuration - eliminating external supervisor ICs in industrial control panels and portable HMIs.

Can TPS6521906RSMR be used in multi-PMIC configurations?

Yes, the TPS6521906RSMR supports coordinated operation with up to three additional TPS65219 devices using GPIO and MODE/RESET pins. This enables synchronized power sequencing across >14 rails - validated for use with AM62x/AM64x SoCs requiring separate core, DDR, and peripheral domain supplies.

What are the key differences between TPS6521906RSMR and TPS6521904RSMR?

The TPS6521906RSMR and TPS6521904RSMR share identical hardware, pinout, and electrical specifications. Their sole difference lies in factory-programmed EEPROM defaults: TPS6521904RSMR is configured for AM62B starter kits with VDD_CORE = 0.85 V, while TPS6521906RSMR uses an alternate rail mapping optimized for broader AM62x/AM64x deployment scenarios.