Texas Instruments TPS65218D0RSLR

Overview

TPS65218D0RSLR from Texas Instruments is a highly integrated power-management IC (PMIC) designed for AM335x and AM438x ARM® Cortex™-A8/A9 processors and FPGAs. It delivers six DC/DC converters (three buck, one buck-boost, two low-I_Q backup), one adjustable LDO, three load switches, supervisor logic, and I²C programmability in a single 48-pin VQFN package. Its core rails supply processor core (DCDC1/2), DDR memory (DCDC3), 3.3-V analog/I/O (DCDC4), RTC/tamper domains (DCDC5/6), and 1.8-V analog/I/O (LDO1).

For engineers reviewing the TPS65218D0RSLR datasheet, TPS65218D0RSLR pinout, TPS65218D0RSLR application, or TPS65218D0RSLR equivalent, this page provides verified technical context, validated pin functions, confirmed operating ranges (e.g., DCDC1: 0.85–1.675 V, 1.8 A), real-world use cases in industrial automation and ePOS, and two rigorously validated alternative PMICs with documented functional and application differences.

Technical Context

The TPS65218D0RSLR implements a hierarchical power architecture: three hysteretic buck converters (DCDC1–DCDC3) target dynamic voltage scaling for processor cores and DDR memory, while DCDC4 operates as a buck-boost regulator to maintain stable 3.3-V output across wide input (2.7–5.5 V). Dual low-quiescent-current buck converters (DCDC5/DCDC6) provide failover power to tamper/RTC domains from either system supply or coin-cell battery, with automatic source selection and battery-level monitoring.

Supervision includes ±4% tolerance on DCDC1/DCDC2 and ±5% on DCDC3/DCDC4/LDO1, configurable strictness mode (STRICT=0b/1b), separate PGOOD signals for main and backup supplies, and interrupt-driven diagnostics (overtemperature, overcurrent, undervoltage). All regulators, load switches, and GPIOs are controlled via a 400-kHz I²C interface (address 0x24), enabling full sequencing, slew-rate programming, and runtime reconfiguration.

Key Specifications

Pinout & Package

The TPS65218D0RSLR is housed in a 48-pin VQFN package (6 mm × 6 mm, 0.4-mm pitch) with an exposed thermal pad connected to ground for thermal relief and power integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65218D0RSLR, TPS65217D0RSLR sacrifices buck-boost flexibility for lower cost in fixed-input systems, while TPS65910A3RSLR requires layout changes and omits critical battery-monitoring functionality-making TPS65218D0RSLR the optimal choice for industrial SoC designs demanding full backup autonomy and wide-input adaptability.

Availability

TPS65218D0RSLR is available at Aetrix Electronics and suitable for industrial automation, electronic point-of-sale (ePOS), and test-and-measurement applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for production programs.

Supply support for TPS65218D0RSLR 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 and embedded processing technologies, with decades of expertise in power management ICs for industrial, automotive, and computing markets.

The TPS65218D0RSLR belongs to TI's AM335x/AM438x-specific PMIC product line, engineered to consolidate power delivery, sequencing, supervision, and backup management into a single chip for ARM® Cortex™-A8/A9 SoCs in rugged, thermally constrained industrial applications.

FAQ

What is the primary processor family supported by the TPS65218D0RSLR?

The TPS65218D0RSLR is specifically designed for Texas Instruments' AM335x and AM438x ARM® Cortex™-A8/A9 SoCs. It provides all required power rails-including core, MPU, DDR, analog/I/O, and RTC backup-with optimized sequencing and voltage accuracy to meet the stringent requirements of these processors in both portable (Li-ion) and non-portable (5-V adapter) configurations.

Does the TPS65218D0RSLR support battery backup for RTC and tamper functions?

Yes, the TPS65218D0RSLR integrates two dedicated low-quiescent-current buck converters (DCDC5 and DCDC6) that automatically switch between system supply (IN_BU) and coin-cell battery (CC) inputs. It monitors CC voltage level and ensures continuous power to RTC/tamper domains during main supply failure-without drawing current from the coin cell when system power is present.

How is power sequencing controlled on the TPS65218D0RSLR?

Power sequencing on the TPS65218D0RSLR is fully programmable via its I²C interface (address 0x24). Engineers can configure power-up and power-down sequences, enable/disable individual rails, set UVLO thresholds, define PGOOD timing, and mask interrupts-all through register writes. This eliminates need for external sequencing ICs or complex resistor networks.

What is the function of the STRICT bit in the TPS65218D0RSLR supervisor?

The STRICT bit configures the supervisor's voltage tolerance behavior: when STRICT = 0b, DCDC1/DCDC2 are monitored at ±4%, and DCDC3/DCDC4/LDO1 at ±5%; when STRICT = 1b, tighter ±1% overvoltage and undervoltage detection is enabled for all monitored rails. This allows designers to balance robustness against false trips in noisy industrial environments.

Can the TPS65218D0RSLR operate from a 2.8-V input for its DCDC4 buck-boost converter?

Yes, the TPS65218D0RSLR's DCDC4 supports input voltages as low as 2.8 V while delivering up to 1.0 A at 3.3 V output. Its buck-boost topology maintains regulation across the full 2.8–5.5 V input range, making it ideal for battery-powered systems where input voltage sags below 3.3 V during discharge-unlike fixed-buck alternatives such as the TPS65217D0RSLR.