Texas Instruments TPS7A2133BPYWDJ

Overview

TPS7A2133BPYWDJ from Texas Instruments is a 500-mA, low-noise, low-I_Q, high-PSRR LDO regulator in a 0.602-mm × 0.602-mm DSBGA package, delivering 3.3 V output with ±1.5% tolerance over line, load, and temperature. It features 6.5 μA quiescent current, 91 dB PSRR at 1 kHz, and 7.7 μV_RMS output noise-optimized for RF power supplies and battery-powered analog systems.

For engineers reviewing the TPS7A2133BPYWDJ datasheet, TPS7A2133BPYWDJ pinout, TPS7A2133BPYWDJ application, or TPS7A2133BPYWDJ equivalent, key selection criteria include ultra-low I_Q for extended battery life, sub-200-mV dropout at 500 mA (for 2.5-V output), stable operation with 1–200 μF ceramic capacitors, and smart EN pulldown for reliable default-disable behavior without external components.

Technical Context

The TPS7A2133BPYWDJ implements a CMOS pass transistor architecture with an integrated low-pass RC filter on its internal reference to achieve 7.7 μV_RMS noise without an external bypass capacitor. Its smart enable circuit includes a 440-kΩ internal pulldown resistor that disconnects upon activation, reducing leakage and eliminating need for external pull-down.

It integrates active discharge via a 150-Ω internal pulldown between OUT and GND during shutdown, triggered by EN < V_EN(LOW) or VIN falling below UVLO (1.11–1.63 V). Thermal shutdown activates at 165°C with hysteresis, and foldback current limiting protects against short-circuit faults with 325 mA typical ISC and 740–1500 mA ICL depending on V_OUT.

Key Specifications

Pinout & Package

TPS7A2133BPYWDJ uses a 4-pin, 0.602-mm × 0.602-mm DSBGA (YWD) package with bottom-side ball layout. The ultra-compact footprint supports high-density PCB designs in space-constrained portable electronics.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TPS7A2133BPYWDJ, TPS7A2033PDQNR trades 200-mA current headroom and 21-dB PSRR for smaller size and lower I_Q, while MCP1826T-3302E/DB sacrifices noise/PSRR performance and miniaturization for broader distributor availability and simpler assembly.

Availability

TPS7A2133BPYWDJ is available at Aetrix Electronics and suitable for RF power supplies, wearable sensor nodes, IP camera image sensors, portable medical ultrasound probes, and smart meter data acquisition modules requiring stable component supply across long product lifecycles.

Supply support for TPS7A2133BPYWDJ 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 connectivity technologies, with decades of LDO design heritage focused on precision, efficiency, and reliability.

The TPS7A21 family was engineered specifically for noise-sensitive RF and analog subsystems-delivering ultra-low I_Q, high PSRR, and minimal output noise in the smallest possible DSBGA packages for space-constrained wireless and portable applications.

FAQ

What is the maximum output current capability of the TPS7A2133BPYWDJ?

The TPS7A2133BPYWDJ delivers up to 500 mA of continuous output current under recommended operating conditions (T_J ≤ 125°C, V_IN ≥ V_OUT + 0.3 V). Its foldback current limit protects against shorts, with typical short-circuit current of 325 mA and programmable current limit ranging from 740 mA to 1500 mA depending on output voltage. Thermal shutdown activates at 165°C to prevent damage during sustained overload.

Does the TPS7A2133BPYWDJ require an external noise-bypass capacitor?

No, the TPS7A2133BPYWDJ does not require an external noise-bypass capacitor. Its internal low-pass RC filter on the reference voltage achieves 7.7 μV_RMS output noise (10 Hz–100 kHz) without additional components. This simplifies layout, reduces bill-of-materials cost, and eliminates capacitor aging or microphonic effects-critical for RF and precision analog applications where external capacitors can degrade noise performance.

How does the smart enable (EN) function work on the TPS7A2133BPYWDJ?

The TPS7A2133BPYWDJ's smart enable pin (B1) features a 440-kΩ internal pulldown resistor that holds the regulator disabled when EN is floating or unconnected-eliminating need for external pull-down resistors. When EN voltage exceeds 0.9 V (V_EN(HI)), the pulldown disconnects to reduce leakage. This design ensures fail-safe startup and enables direct interface with weak-drive GPIOs, such as those found on ultra-low-power MCUs.

What is the dropout voltage specification for the TPS7A2133BPYWDJ at 500 mA output?

At 500 mA output current and 2.5-V nominal output voltage, the TPS7A2133BPYWDJ has a maximum dropout voltage of 175 mV. For its configured 3.3-V output, the dropout is 260 mV max at 500 mA. This means the device maintains regulation with input as low as 3.56 V (3.3 V + 260 mV), enabling efficient operation from single-cell Li-ion batteries or tightly regulated intermediate rails without excessive headroom loss.

Can the TPS7A2133BPYWDJ be used with ceramic output capacitors less than 1 μF?

Yes-the TPS7A2133BPYWDJ is stable with output capacitance as low as 0.4 μF when using ceramic capacitors with ESR ≤ 100 mΩ. With ESR reduced to ≤20 mΩ (e.g., X7R/X5R MLCCs), stable operation is guaranteed down to 0.3 μF. This flexibility supports compact designs using small-case 0402 or 0201 MLCCs, unlike older LDOs requiring ≥2.2 μF tantalum or aluminum electrolytic capacitors for stability.