Texas Instruments TPS79933DDCTG4

Overview

TPS79933DDCTG4 from Texas Instruments is a 200-mA, low-quiescent-current, ultralow-noise, high-PSRR low-dropout linear regulator delivering fixed 3.3 V output. It features 40 μA typical ground current, 100 mV dropout at 200 mA, ±2% total output accuracy over load/line/temperature, and stable operation with ≥2-μF ceramic output capacitance. It serves precision analog and RF power rails in space-constrained portable electronics.

For engineers reviewing the TPS79933DDCTG4 datasheet, TPS79933DDCTG4 pinout, TPS79933DDCTG4 application, or TPS79933DDCTG4 equivalent, key selection criteria include its 66 dB PSRR at 1 kHz, 10.5 × V_OUT μV_RMS output noise (with CNR), EN-controlled shutdown with 0.15 μA quiescent current, and compatibility with 0.97 mm × 1.34 mm DSBGA packaging.

Technical Context

The TPS79933DDCTG4 employs a PMOS pass element and high-gain error amplifier to achieve ultralow dropout (100 mV at 200 mA) and high PSRR (66 dB @ 1 kHz, 51 dB @ 10 kHz) even at low headroom. Its noise-reduction (NR) pin accepts an external capacitor to bypass bandgap reference noise, reducing integrated output noise to 10.5 × V_OUT μV_RMS.

It integrates inrush current protection activated on EN toggle, overshoot detection with active pulldown (~350 Ω), undervoltage lockout (UVLO) with 70 mV hysteresis, and thermal shutdown (165°C trip). Fully specified from –40°C to +125°C, it uses BiCMOS fabrication for stable performance across industrial and extended temperature ranges.

Key Specifications

Pinout & Package

TPS79933DDCTG4 is packaged in a 5-bump, thin, 0.97-mm × 1.34-mm DSBGA (YZU package), optimized for ultra-compact PCB layouts in mobile and wearable devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS79933DDCR, the TPS79933DDCTG4 offers identical regulation performance but reflects an earlier lead-free plating specification; versus LP5907MFX-3.3/NOPB, it trades slightly higher noise for superior PSRR, integrated protection features, and NR-capable noise tailoring-making it more suitable for RF-critical and safety-aware designs.

Availability

TPS79933DDCTG4 is available at Aetrix Electronics and suitable for wireless LAN modules, wearable electronics, EPOS terminals, and RF front-end biasing requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS79933DDCTG4 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 over 50 years of innovation in power management ICs.

The TPS799 family was designed specifically for high-performance, low-noise, low-quiescent-current LDO applications in RF, portable, and precision analog systems-emphasizing PSRR, noise suppression, and thermal robustness in miniature packages.

FAQ

What is the maximum input voltage rating for the TPS79933DDCTG4?

The TPS79933DDCTG4 has an absolute maximum input voltage of 7.0 V. However, for reliable operation within recommended conditions, VIN must remain between 2.7 V and 6.5 V. Exceeding 6.5 V may cause permanent damage or violate thermal limits, especially at high ambient temperatures or full load.

Does the TPS79933DDCTG4 require an input capacitor for stability?

No, the TPS79933DDCTG4 does not require an input capacitor for stability. However, a 0.1–1 μF low-ESR ceramic capacitor placed close to the IN pin improves source impedance, transient response, and PSRR-especially when powered from noisy DC/DC converters or high-impedance sources.

How does the NR pin function in the TPS79933DDCTG4?

The NR pin on the TPS79933DDCTG4 connects to an external noise-reduction capacitor (typically 0.01 μF) that bypasses internal bandgap reference noise. This reduces total output noise from ~94 × V_OUT to 10.5 × V_OUT μV_RMS, enabling use in ultra-sensitive RF and precision analog circuits.

What is the shutdown current of the TPS79933DDCTG4 when EN is low?

When the EN pin is driven below 0.4 V, the TPS79933DDCTG4 enters shutdown mode with a typical ground current of 0.15 μA and maximum of 1 μA over temperature. This ultra-low shutdown current preserves battery life in always-connected portable devices.

Is the TPS79933DDCTG4 compatible with ceramic output capacitors?

Yes-the TPS79933DDCTG4 is explicitly designed to be stable with standard X5R or X7R ceramic output capacitors of 2.2 μF or greater. Its internal compensation eliminates ESR requirements, and maximum ESR is specified at <1.0 Ω for optimal transient response and phase margin.