Texas Instruments TPS22993RLWT

Overview

TPS22993RLWT from Texas Instruments is a quad-channel load switch IC with integrated GPIO and I²C control, designed for power sequencing in space-constrained portable systems. It features 15 mΩ typical R_ON at 3.3 V input (V_BIAS = 7.2 V), 1.2 A max continuous current per channel, programmable slew rate (5 options), and I²C SwitchALL™ command support. It serves as a precision power gate in ultrabooks, tablets, and all-in-one PCs.

For engineers reviewing the TPS22993RLWT datasheet, TPS22993RLWT pinout, TPS22993RLWT application, or TPS22993RLWT equivalent, key selection criteria include its dual-control mode (GPIO/I²C), 4.5–17.2 V V_BIAS range for Li-ion battery compatibility, 1.0–3.6 V input voltage support, <6 µA shutdown current, and QFN-20 RLW package (3 mm × 3 mm, 0.4 mm pitch).

Technical Context

The TPS22993RLWT integrates four independent N-channel MOSFETs with internal gate drivers, each configurable via either dedicated ONx GPIO pins or I²C registers. Its architecture supports simultaneous multi-channel control via the SwitchALL™ command and per-channel configuration of slew rate, ON-delay (4 options), and quick output discharge (QOD) resistance (4 options).

Control logic includes automatic default-to-GPIO mode on power-up, dynamic switching between GPIO and I²C modes without glitch, and address configuration via three ADDx pins enabling up to seven unique I²C slave addresses. The device operates across –40°C to +85°C and uses V_DD (1.62–3.6 V) for I²C interface level shifting, decoupling digital control from high-side V_BIAS.

Key Specifications

Pinout & Package

The TPS22993RLWT is housed in a 20-pin WQFN package (RLW), 3 mm × 3 mm body, 0.75 mm height, 0.4 mm pitch, with exposed thermal pad. Pin 13 is GND; pins 1–5, 11–12, 14–15 are signal I/O; pins 6, 16, 19–20 are address/control inputs; pins 3, 4, 18 are power supplies.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel load switch applications.

Compared with TPS22992RLWT, the TPS22993RLWT adds I²C configurability and SwitchALL™ for coordinated control, while TPS22975DRCR offers lower R_ON but sacrifices integration, programmability, and space efficiency-making TPS22993RLWT optimal for compact, firmware-managed power systems.

Availability

TPS22993RLWT is available at Aetrix Electronics and suitable for ultrabooks, tablets, and all-in-one PCs requiring stable component supply, precise power sequencing, and long-term industrial lifecycle support.

Supply support for TPS22993RLWT 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 high-reliability power solutions.

The TPS22993RLWT belongs to TI's load switch portfolio, engineered specifically for portable and space-constrained computing platforms requiring low-R_ON, multi-rail sequencing, and firmware-configurable power control.

FAQ

What is the maximum continuous current per channel for the TPS22993RLWT?

The TPS22993RLWT supports a maximum continuous current of 1.2 A per channel under recommended operating conditions (T_A ≤ 85°C, proper PCB thermal design). This rating assumes adequate copper pour and thermal vias beneath the exposed pad to maintain junction temperature within limits. Derating is required at elevated ambient temperatures or with reduced copper area.

Does the TPS22993RLWT support both GPIO and I²C control simultaneously?

Yes, the TPS22993RLWT supports concurrent GPIO and I²C control: ON1–ON4 pins operate in parallel with I²C register writes. The control register (05h) allows per-channel selection of GPIO or I²C enable, and mode switching occurs dynamically without glitch-verified in Figure 29 of the datasheet.

What is the purpose of the VBIAS pin on the TPS22993RLWT?

The VBIAS pin on the TPS22993RLWT supplies gate drive voltage to the internal N-channel MOSFET drivers. It accepts 4.5 V to 17.2 V, enabling direct connection to multi-cell Li-ion batteries (2S–4S). VBIAS is independent of VIN and VDD, allowing high-side switching of low-voltage rails without compromising drive strength or R_ON.

How does the Quick Output Discharge (QOD) function work on the TPS22993RLWT?

The TPS22993RLWT implements QOD by connecting an internal pulldown resistor (110 Ω to 949 Ω, selectable via register bits QOD[1:0]) between VOUTx and GND when the channel is disabled. This actively discharges output capacitance, preventing floating voltages and back-powering of upstream sources-critical for reliable hot-swap and state retention.

Can multiple TPS22993RLWT devices share the same I²C bus?

Yes, up to seven TPS22993RLWT devices can coexist on a single I²C bus using unique slave addresses set by tying ADD1–ADD3 high or low. Each combination yields a distinct 7-bit address (0x48–0x4E), eliminating address collision. External pull-ups to VDD are required on SCL/SDA, sized per bus capacitance and speed.