Texas Instruments TPS65072RSLR

Overview

TPS65072RSLR from Texas Instruments is a highly integrated power management IC (PMIC) for portable systems with single-cell Li-Ion/Li-Polymer batteries. It integrates a 2-A power path manager, linear battery charger (1.5-A max), three 2.25-MHz step-down converters (DCDC1/2/3), two LDOs (VLDO1/VLDO2), a wLED boost driver, 10-bit ADC, and I²C interface - all in a 48-pin VQFN package. It powers OMAP-L1x8, Atlas IV, and similar low-power processors in handheld navigation and PDA applications.

For engineers reviewing the TPS65072RSLR datasheet, TPS65072RSLR pinout, TPS65072RSLR application, or TPS65072RSLR equivalent, key selection considerations include its fixed DCDC1/DCDC2 output voltages (1.2 V / 1.4 V), 600-mA per-channel DCDC3 current rating, absence of touch screen controller, and EN_wLED enable pin - distinguishing it from TPS65070/TPS65073 variants.

Technical Context

The TPS65072RSLR implements a dedicated power path architecture that prioritizes system load over battery charging when both AC and USB inputs are present. Its three buck converters operate at fixed 2.25 MHz with automatic PFM/PWM mode transition, supporting light-load efficiency down to 19 µA quiescent current per converter. The device uses internal sequencing controlled by DCDC_SQ[2..0] = 100 or 111 for Sirf Prima or Atlas IV processors.

Unlike TPS65070/TPS65073, the TPS65072RSLR omits touch screen analog inputs (AD_IN1–AD_IN4) and RESET/THRESHOLD pins, instead providing EN_EXTLDO (push-pull) and EN_wLED (active-high enable) for external LDO control and LED driver activation. Its wLED boost supports two current sinks (ISINK1/ISINK2) with programmable full-scale current via ISET1/ISET2 resistors and I²C register control.

Key Specifications

Pinout & Package

The TPS65072RSLR is housed in a thermally enhanced 48-pin VQFN package (6.0 mm × 6.0 mm, 0.4 mm pitch) with an exposed thermal pad connected to PGND. This package supports high-power dissipation with R_θJC(bot) = 1 °C/W and requires PCB-level thermal vias under the pad for reliable operation in portable systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65070RSLR and TPS65073RSLR, the TPS65072RSLR trades touch interface and higher DCDC3 current for simplified sequencing (Atlas IV/Sirf Prima), EN_EXTLDO output, and EN_wLED pin - making it optimal for non-touch, cost-sensitive portable navigation and PDA designs where external LDO control is required.

Availability

TPS65072RSLR is available at Aetrix Electronics and suitable for handheld navigation systems, pocket PCs, Atlas IV-based portable devices, and low-power embedded processors requiring stable component supply and long-term industrial availability.

Supply support for TPS65072RSLR 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 company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and microcontrollers.

The TPS6507x product line was designed specifically for battery-powered portable electronics, integrating battery charging, multi-rail DC/DC conversion, LDO regulation, and display backlighting into a single compact PMIC for OMAP, Atlas, and similar low-power application processors.

FAQ

What is the maximum battery charge current supported by the TPS65072RSLR?

The TPS65072RSLR supports a maximum linear battery charge current of 1.5 A, set externally via the ISET resistor connected between ISET pin and GND. The device includes thermal regulation, safety timers, and temperature sensing via the TS pin to prevent overcharge or overheating during charging cycles. This charge current is independent of USB/AC input limits, which are configurable up to 1.3 A on USB and 2.5 A on AC.

Does the TPS65072RSLR include a touch screen controller?

No, the TPS65072RSLR does not include a touch screen controller. Unlike TPS65070RSLR and TPS65073RSLR, it omits the AD_IN1–AD_IN4 pins and associated internal circuitry. This makes the TPS65072RSLR suitable for non-touch applications such as basic navigation systems or PDAs without resistive touchscreens, reducing cost and simplifying layout.

What are the fixed output voltages of the DCDC converters in the TPS65072RSLR?

The TPS65072RSLR has fixed DCDC output voltages: DCDC1 delivers 1.2 V, DCDC2 delivers 1.4 V, and DCDC3 delivers 3.3 V. These values are factory-programmed and cannot be adjusted via external feedback resistors. DCDC3 is rated for 600 mA output current - lower than the 1.5-A rating found in TPS65070/TPS65073 variants - aligning with Atlas IV processor requirements.

How is the wLED backlight driver controlled on the TPS65072RSLR?

The wLED driver on the TPS65072RSLR is controlled either via the I²C interface (using registers in WLED_CTRL0) or through the EN_wLED pin (Pin 47), which provides active-high hardware enable. Full-scale current for ISINK1 and ISINK2 is set by external resistors on ISET1 and ISET2 pins, with two ranges selectable via the Current Level bit. The boost converter operates up to 40 V at L4 and supports two independent LED strings.

What package type and thermal characteristics does the TPS65072RSLR use?

The TPS65072RSLR uses a 48-pin VQFN package (RSL) measuring 6.0 mm × 6.0 mm with 0.4-mm pitch and an exposed thermal pad. Its thermal metrics include R_θJC(bot) = 1 °C/W and R_θJA = 30 °C/W (measured on high-K board). The thermal pad must be soldered to a PCB ground plane with multiple thermal vias to maintain junction temperature below 125°C under full load.