Texas Instruments TPS65218B1PHPR

Overview

TPS65218B1PHPR from Texas Instruments is a highly integrated power management IC (PMIC) designed for ARM® Cortex™-A8/A9 SoCs and FPGAs. It integrates six DC-DC converters-including three adjustable 1.8-A buck regulators (DCDC1–DCDC3), one 1.6-A buck-boost (DCDC4), and two low-quiescent-current backup supplies (DCDC5/DCDC6)-plus one 400-mA adjustable LDO (LDO1), three load switches (LS1–LS3), supervisor, and I²C interface (0x24). It supports dual-input operation (system rail or coin-cell) and operates across –40°C to +105°C for industrial HMI and ePOS systems.

For engineers reviewing the TPS65218B1PHPR datasheet, TPS65218B1PHPR pinout, TPS65218B1PHPR application, or TPS65218B1PHPR equivalent, key selection criteria include its 48-pin VQFN (6 mm × 6 mm) package, I²C-configurable sequencing, ±4% output voltage tolerance on main rails, active output-discharge capability, and support for battery-backup domain with dedicated PGOOD_BU monitoring.

Technical Context

The TPS65218B1PHPR implements a multi-rail, digitally configurable power architecture with independent enable/control per converter and load switch. Its I²C interface enables dynamic voltage scaling, fault reporting, and sequencing control-critical for ARM-based embedded systems requiring coordinated power-up/down of CPU, memory, and peripherals.

It features a hierarchical supervision scheme: PGOOD monitors DCDC1–DCDC4 and LDO1 with ±4% to ±5% tolerance windows, while PGOOD_BU independently validates DCDC5 and DCDC6 outputs. The device includes undervoltage lockout (UVLO), overtemperature shutdown, push-button wake-up, and AC-detector input for adapter presence detection.

Key Specifications

Pinout & Package

TPS65218B1PHPR is housed in a thermally enhanced 48-pin VQFN package (6.00 mm × 6.00 mm, 0.4-mm pitch) with exposed thermal pad for efficient heat dissipation in compact industrial PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65218B1PHPR, TPS65217C1PHPR omits backup-domain functionality and PGOOD_BU, limiting use in battery-critical systems; TPS65910A3RSLR adds rail count and flexibility but increases firmware complexity and removes hardware-enforced backup monitoring - making TPS65218B1PHPR optimal for cost-constrained, battery-resilient industrial HMI and ePOS designs.

Availability

TPS65218B1PHPR is available at Aetrix Electronics and suitable for human-machine interface (HMI), electronic point-of-sale (ePOS), and industrial automation applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial-grade temperature performance.

Supply support for TPS65218B1PHPR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The TPS65218 product line was engineered specifically to consolidate power delivery for ARM Cortex-A8/A9 SoCs and FPGAs in space-constrained, thermally demanding industrial applications - emphasizing integration, reliability, and seamless battery-backup operation.

FAQ

What is the package type and thermal characteristics of the TPS65218B1PHPR?

The TPS65218B1PHPR uses a 48-pin VQFN package measuring 6.00 mm × 6.00 mm with 0.4-mm pitch and an exposed thermal pad. Its R_θJA is 32.5°C/W (JEDEC standard board), enabling operation up to +105°C ambient when properly mounted on a 2-layer PCB with ≥200 mm² copper pour under the thermal pad. This makes the TPS65218B1PHPR suitable for fanless industrial enclosures.

Does the TPS65218B1PHPR support I²C-based dynamic voltage scaling?

Yes, the TPS65218B1PHPR supports full I²C-based dynamic voltage scaling via its 400-kHz-compatible interface (address 0x24). Engineers can adjust DCDC1–DCDC4 and LDO1 output voltages in real time using register writes to VSET fields - enabling adaptive power management for ARM Cortex-A8/A9 processors during varying workload states without hardware modification.

How does the TPS65218B1PHPR handle power-fail detection and system wake-up?

The TPS65218B1PHPR uses the dedicated PFI input pin to monitor system input voltage via an external resistor divider. When PFI falls below the threshold, the open-drain nPFO output asserts low. Simultaneously, the PB pin supports push-button wake-up, and nWAKEUP provides interrupt-capable wake signaling - all coordinated through internal state machines to ensure deterministic recovery in the TPS65218B1PHPR without external glue logic.

Can the TPS65218B1PHPR operate solely from a coin-cell battery?

No - the TPS65218B1PHPR cannot operate entirely from a coin-cell battery. While DCDC5 and DCDC6 are powered from either IN_BU (system rail) or CC (coin cell), the main DC-DC converters (DCDC1–DCDC4), LDO1, and supervisory circuitry require ≥2.2 V on IN_BIAS and ≥2.7 V on primary input rails. The coin cell only sustains the backup domain (RTC/SRAM) when main power is absent.

What is the function of the DC34_SEL pin on the TPS65218B1PHPR?

The DC34_SEL pin on the TPS65218B1PHPR determines the power-up default output voltage for the DCDC3/DCDC4 pair: a grounded resistor selects 1.2 V for DCDC3 and 3.3 V for DCDC4, while an open or pulled-high configuration selects alternate defaults. This hardware-selectable configuration eliminates I²C initialization dependency during cold boot - ensuring predictable rail startup before firmware execution begins.