Texas Instruments TPS65073RSLT

Overview

TPS65073RSLT from Texas Instruments is a highly integrated power management IC (PMIC) for single-cell Li-Ion/Li-Polymer battery-powered portable systems. It integrates a 2-A power path manager, linear battery charger (1.5-A max), three 2.25-MHz step-down converters (0.6 A / 0.6 A / 1.5 A), two LDOs (1.8 V / 1.8 V, 200 mA each), wLED boost driver, 10-bit ADC, and touch screen interface - all in a 48-pin VQFN (6 mm × 6 mm) package. It targets OMAP35xx-based handheld navigation and PDA applications requiring coordinated voltage sequencing and battery-aware power control.

For engineers reviewing the TPS65073RSLT datasheet, TPS65073RSLT pinout, TPS65073RSLT application, or TPS65073RSLT equivalent, this page delivers verified technical context on its dual-voltage DCDC1/DCDC2 outputs (1.2 V / 1.35 V), internal sequencing, 400-ms reset delay, integrated touch controller with four analog inputs (AD_IN1–AD_IN4), and thermal regulation via TS pin - critical for robust embedded power design.

Technical Context

The TPS65073RSLT implements an integrated power path architecture that dynamically selects between AC adapter (pin AC) and USB (pin USB) inputs while managing battery charging and system supply (SYS rail) without interruption. Its three buck converters operate at fixed 2.25 MHz with automatic PFM/PWM mode transition, supporting adjustable or fixed outputs - DCDC1 and DCDC2 are configured to 1.2 V and 1.35 V respectively for OMAP35xx core/memory rails, while DCDC3 delivers 1.8 V at up to 1.5 A for I/O peripherals.

Two LDOs provide low-noise, dynamically scalable (LDO2) 1.8-V supplies; the wLED boost converter supports two LED strings with programmable current sinks (ISINK1/ISINK2) and I²C dimming control. The device includes a 10-bit ADC with four dedicated touch-screen analog inputs (TSX1/TSX2/TSY1/TSY2), temperature sensing (TS pin), and open-drain interrupt generation (INT) tied to power events, touch detection, or button press (PB_IN).

Key Specifications

Pinout & Package

The TPS65073RSLT is housed in a thermally enhanced 48-pin VQFN package (6.00 mm × 6.00 mm, 0.4-mm pitch) with exposed thermal pad connected to PGND. Pin functions are validated per TI SLVS950I Rev. I datasheet (May 2018), with full I/O mapping confirmed for TPS65073 variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS650731RSLT and TPS650732RSLT, the TPS65073RSLT uniquely provides matched 1.8-V outputs on both LDO1 and LDO2 - essential for OMAP35xx platforms requiring dual 1.8-V rails for memory and peripherals - while retaining identical sequencing, touch interface, and thermal protection features.

Availability

TPS65073RSLT is available at Aetrix Electronics and suitable for portable navigation systems, OMAP35xx-based PDAs, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS65073RSLT 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 experience in high-reliability portable power solutions.

The TPS6507x product line was designed specifically for battery-powered OMAP™ and low-power DSP platforms, integrating charger, multiple DC/DCs, LDOs, touch control, and system monitoring into a single compact PMIC to minimize footprint and simplify power architecture.

FAQ

What is the function of the TS pin on the TPS65073RSLT?

The TS pin on the TPS65073RSLT is a dedicated temperature sense input that connects to an external NTC thermistor (10-kΩ curve 2 or 100-kΩ curve 1) to monitor battery pack temperature. This enables real-time thermal regulation of the linear battery charger - reducing or halting charge current when unsafe temperatures are detected. The TPS65073RSLT uses this signal to enforce JEITA-compliant charging profiles, ensuring safe operation across environmental conditions.

Does the TPS65073RSLT support I²C communication, and what is its role?

Yes, the TPS65073RSLT supports standard-mode I²C communication via SCLK (Pin 28) and SDAT (Pin 27). It uses I²C to configure registers controlling DCDC output voltages, wLED dimming levels, ADC settings, and power-on sequencing parameters. The interface also enables readback of status flags (e.g., charger fault, PGOOD, touch event) and real-time adjustment of LDO2 voltage for dynamic voltage scaling - critical for optimizing power in OMAP35xx-based systems.

How does the TPS65073RSLT handle power source arbitration between AC and USB inputs?

The TPS65073RSLT implements hardware-based power path management that automatically selects between AC (Pin 10) and USB (Pin 12) inputs based on presence and priority. When both are present, AC takes precedence. The device delivers up to 2 A to the SYS rail while simultaneously charging the battery at up to 1.5 A - all without interrupting system operation. Input current limits (100/500/800/1300 mA) are programmable via I²C, and overvoltage lockout protects against >5.8-V AC sources.

What is the purpose of the PB_IN and POWER_ON pins on the TPS65073RSLT?

The PB_IN (Pin 25) and POWER_ON (Pin 13) pins implement a two-stage power button interface for the TPS65073RSLT. PB_IN is an active-low input with internal 50-kΩ pullup that initiates internal sequencing and enables DCDCs/LDOs. POWER_ON is an active-high input driven by the application processor after PB_IN assertion; it sustains the ON state when PB_IN is released. This prevents accidental shutdown and enables controlled software-initiated power-down - a key feature for OMAP35xx system reliability.

Can the TPS65073RSLT drive white LEDs directly, and what are its wLED capabilities?

Yes, the TPS65073RSLT integrates a dedicated inductive wLED boost converter with two programmable current sinks (ISINK1 and ISINK2, Pins 34 and 33). It supports up to two LED strings (e.g., display backlight), delivering up to 25 mA per string. Brightness is controlled via I²C registers or PWM input on EN_wLED (Pin 47). The FB_WLED (Pin 38) feedback pin allows closed-loop output voltage regulation, and internal dimming eliminates need for external PWM generators - simplifying design for handheld displays.