Texas Instruments TPS22921YZTR

Overview

TPS22921YZTR from Texas Instruments is a 3.6-V, 2-A P-channel load switch with 14-mΩ typical ON-resistance at 3.6 V input, controlled-slew-rate turn-on (30 μs rise time), and ultra-low 78-nA quiescent current at 1.8 V - deployed in portable power rail management for GPS modules and peripheral ports.

For engineers reviewing the TPS22921YZTR datasheet, TPS22921YZTR pinout, TPS22921YZTR application, or TPS22921YZTR equivalent, key selection criteria include input voltage range (0.9–3.6 V), absence of quick-output-discharge circuitry, thermal performance in 0.9-mm × 1.4-mm DSBGA, and compatibility with 1.2-V to 3.3-V logic enable signals.

Technical Context

The TPS22921YZTR integrates a single P-channel MOSFET with internal gate-driver control logic that enforces a fixed 30-μs output voltage rise time across its operating VIN range, preventing inrush current during power-up. Its active-high ON input accepts logic thresholds as low as 0.85 V, enabling direct interface with 1.2-V I/O domains without level shifting.

No internal pulldown resistor is present on the output - distinguishing it from TPS22922/22B variants - making it suitable for applications where output floating during disable is acceptable or externally managed. It operates over –40°C to +85°C and is characterized for continuous 2-A load current with thermal resistance R_θJA = 131°C/W in YZP package.

Key Specifications

Pinout & Package

TPS22921YZTR uses a 6-pin wafer-chip-scale package (DSBGA, YZP variant) with 0.5-mm pitch, 0.9-mm × 1.4-mm body size, and 0.5-mm height. The package features bottom-side solder bumps and requires PCB land pattern per TI SLVA602.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22922YZTR, TPS22921YZTR offers lower shutdown current (35 nA vs. 120 nA) and no output discharge - ideal for ultra-low-power hold-up. Against TPS22965YBHR, it trades current headroom and voltage range for minimal footprint and leakage, fitting tight-space battery-powered designs.

Availability

TPS22921YZTR is available at Aetrix Electronics and suitable for GPS modules, peripheral ports, MP3 player power management, and RF module bias sequencing requiring stable component supply across industrial temperature ranges and long-lifecycle programs.

Supply support for TPS22921YZTR 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TPS229xx family targets ultra-low-power, space-constrained portable electronics - designed specifically to replace discrete FET+driver solutions with integrated, slew-controlled load switching in sub-4-V battery-operated systems.

FAQ

What is the maximum input voltage rating for the TPS22921YZTR?

The TPS22921YZTR has an absolute maximum input voltage rating of 4 V, with recommended operation limited to 0.9 V to 3.6 V. Exceeding 4 V risks permanent damage per Absolute Maximum Ratings table in SLVS749C. For 5-V systems, consider TPS22965YBHR instead.

Does the TPS22921YZTR include quick output discharge functionality?

No, the TPS22921YZTR does not include quick output discharge. Unlike TPS22922YZTR and TPS22922B, it lacks the internal 65-Ω pulldown resistor. When disabled, VOUT floats - requiring external discharge circuitry if active pull-down is needed in your design.

What is the typical ON-resistance of the TPS22921YZTR at 1.8 V input?

The typical ON-resistance of the TPS22921YZTR at VIN = 1.8 V is 33 mΩ, measured at 25°C with IOUT = –200 mA. This value increases to 75 mΩ at –40°C and decreases to 67 mΩ at +85°C per Figure 2 in the datasheet.

Can the TPS22921YZTR be used with a 1.2-V logic enable signal?

Yes, the TPS22921YZTR supports 1.2-V logic enable: its VIH(min) is 0.85 V at VIN ≥ 0.9 V, ensuring reliable turn-on with 1.2-V CMOS outputs. No level shifter is required, simplifying interface with low-voltage microcontrollers and application processors.

What package type and dimensions does the TPS22921YZTR use?

The TPS22921YZTR uses the YZP wafer-chip-scale package: 0.9 mm × 1.4 mm nominal body size, 0.5-mm pitch, and 0.5-mm height. It features six solder bumps arranged in a 2×3 array (A1/A2/B1/B2/C1/C2) per TI mechanical drawing SLVA602.