Texas Instruments TPS65181BRGZT

Overview

TPS65181BRGZT from Texas Instruments is a highly integrated PMIC engineered specifically for E Ink® Vizplex™ electronic paper displays, delivering ±15-V LDOs (VPOS/VNEG), ±22-V/–20-V charge pumps (VDDH/VEE), inverting buck-boost (DCDC2), boost (DCDC1), I²C-programmable VCOM driver (–0.3 V to –2.5 V), and thermistor-based panel temperature monitoring (±1°C accuracy from 0°C to 50°C). It operates from a single 3 V to 6 V input and supports up to 9.7-inch active-matrix EPD panels.

For engineers reviewing the TPS65181BRGZT datasheet, TPS65181BRGZT pinout, TPS65181BRGZT application, or TPS65181BRGZT equivalent, this page provides verified functional specifications, validated I²C register-controlled rail sequencing, confirmed thermal sensing behavior, and real-world EPD power architecture context - all grounded in TI's SLVSA76G datasheet (Jan 2016).

Technical Context

The TPS65181BRGZT implements dual DC–DC conversion: a boost converter (DCDC1) generating +17 V (up to 160 mA), fed into a positive charge pump (CP1) to deliver +22 V at 10 mA for gate drivers; and an inverting buck-boost (DCDC2) generating –17 V (up to 160 mA), fed into a negative charge pump (CP2) to deliver –20 V at 12 mA. Its two tracking LDOs (LDO1/LDO2) maintain ±15 V outputs with ≤±50 mV inter-rail mismatch under load.

It features autonomous 60-second temperature sampling (TPS65181 variant), 8-bit VCOM adjustment (11 mV/LSB), open-drain nINT and PWR_GOOD signaling, and flexible GPIO-based (PWR[3:0]) or I²C-controlled power sequencing - enabling precise timing alignment with EPSON S1D13522/S1D13521 and OMAP-based timing controllers.

Key Specifications

Pinout & Package

TPS65181BRGZT is housed in a thermally enhanced 48-pin VQFN (RGZ) package (7.0 mm × 7.0 mm × 0.9 mm) with an exposed PowerPAD (PBKG) that must be connected to VN_SW via a wide copper trace for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65181B, TPS65181BRGZT offers identical EPD rail generation and VCOM control but lacks Broadsheet protocol support and requires explicit INT register reads after faults - making it ideal for ISIS/OMAP-based readers where those features are unused. Versus NRND TPS65180B, it adds autonomous temperature monitoring critical for unattended EPD deployments.

Availability

TPS65181BRGZT is available at Aetrix Electronics and suitable for e-book reader power systems, industrial EPD label displays, medical patient ID badges, and smart retail shelf labels requiring stable component supply and long-term lifecycle support.

Supply support for TPS65181BRGZT 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 expertise in display power solutions.

The TPS6518x family was designed explicitly for E Ink® Vizplex™ electronic paper displays, addressing the unique sequencing, voltage accuracy, thermal compensation, and ultra-low standby power needs of portable EPD applications.

FAQ

What is the key functional difference between TPS65181BRGZT and TPS65181B?

The TPS65181BRGZT supports only standard I²C protocol and requires reading the INT register to clear fault interrupts, while TPS65181B adds EPSON Broadsheet timing controller protocol support and features auto-resetting interrupts. Both share identical pinout, package, and core power rail specifications - the distinction lies solely in communication protocol scope and interrupt handling behavior.

Does TPS65181BRGZT support automatic temperature measurement without host intervention?

Yes. The TPS65181BRGZT automatically samples the TS pin every 60 seconds and stores the result in the TMST_VALUE register, enabling continuous panel temperature monitoring without CPU polling. This autonomous behavior is a defining feature of the TPS65181/TPS65181B variants (vs. host-triggered sampling in TPS65180/TPS65180B).

How does the VCOM tracking accuracy of TPS65181BRGZT impact E Ink display performance?

The TPS65181BRGZT guarantees ±1.5% VCOM accuracy (±18 mV at –1.25 V) across its –0.3 V to –2.5 V range. This precision directly prevents image ghosting and contrast shift in E Ink panels, especially during partial refreshes or temperature variations - a critical requirement for medical and industrial EPD applications.

Can TPS65181BRGZT power both gate and source drivers of a 9.7-inch E Ink panel?

Yes. The TPS65181BRGZT delivers +22 V at 10 mA (VDDH) and –20 V at 12 mA (VEE) for gate drivers, and ±15 V at 120 mA each (VPOS/VNEG) for source drivers - meeting the full power budget of 9.7-inch Vizplex panels as specified in TI's application documentation and typical EPD timing controller requirements.

What thermal management practices are required for reliable TPS65181BRGZT operation at full load?

TI specifies a junction-to-board thermal resistance (R_θJB) of 7.1°C/W for the RGZ package. To maintain T_J < 125°C at full load, the PCB must use a wide copper trace connecting the PBKG thermal pad to the VN_SW node, plus ≥2 oz copper on inner layers - per JEDEC JESD51-7 high-K board guidelines referenced in the datasheet.