Texas Instruments TPS79930DDCTG4

Overview

TPS79930DDCTG4 from Texas Instruments is a 200-mA, fixed 3.0-V output, low-dropout linear regulator with enable (EN), ultralow noise (10.5 × V_OUT μV_RMS), high PSRR (66 dB at 1 kHz), and 40-μA quiescent current - designed for powering noise-sensitive RF and analog circuitry in space-constrained portable systems.

For engineers reviewing the TPS79930DDCTG4 datasheet, TPS79930DDCTG4 pinout, TPS79930DDCTG4 application, or TPS79930DDCTG4 equivalent, this page delivers verified electrical specs, validated SOT-23-THIN pin mapping, real-world use cases in wearable electronics and VCO biasing, and two confirmed alternative LDOs with documented functional trade-offs.

Technical Context

The TPS79930DDCTG4 employs a PMOS pass element and precision 1.193-V internal reference to achieve 2% total output accuracy across –40°C to +125°C, load (500 μA–200 mA), and line (2.7 V–6.5 V) variations. Its high-gain error amplifier enables stable operation with ≥2-μF ceramic output capacitance and supports fast transient response via active pulldown during >5% output overshoot.

Inrush current protection activates immediately on EN toggle, clamping startup surge; undervoltage lockout (UVLO) with 70-mV hysteresis ensures clean turn-on above 2.2 V. The NR pin accepts a 0.01-μF capacitor to bypass bandgap noise and reduce output noise by up to 90% versus no NR cap.

Key Specifications

Pinout & Package

TPS79930DDCTG4 is packaged in a 5-pin SOT-23-THIN (DDC) with 2.90 mm × 1.60 mm body size and 0.95-mm pitch. This thermally enhanced thin-outline package supports high-density PCB layouts and delivers R_θJA = 225.3°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS79930DDCTG4, TPS79930DDCR offers identical performance in reel format for high-volume manufacturing, while MCP1700T-3002E/MB trades PSRR, noise, and dropout for ultra-low I_Q - making it viable only in non-RF contexts where 330-mV dropout is acceptable.

Availability

TPS79930DDCTG4 is available at Aetrix Electronics and suitable for RF transceiver biasing, wearable sensor hubs, industrial wireless nodes, VCO core supplies, and precision analog subsystems requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TPS79930DDCTG4 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets since 1930.

The TPS799 family was engineered specifically for ultra-low-noise, high-PSRR power delivery in RF and precision analog signal chains - targeting base stations, smartphones, and wireless LAN modules where supply integrity directly impacts RF performance.

FAQ

What is the maximum input voltage rating for the TPS79930DDCTG4?

The absolute maximum input voltage for the TPS79930DDCTG4 is 7.0 V. However, the recommended operating range is 2.7 V to 6.5 V. Exceeding 6.5 V may trigger internal protection circuits or accelerate parametric drift. For reliable 3.0-V output regulation, VIN must remain ≥3.1 V (V_OUT + V_DO) under 200-mA load - the TPS79930DDCTG4 is not rated for 7-V operation in continuous service.

Does the TPS79930DDCTG4 require an input capacitor for stability?

No, the TPS79930DDCTG4 does not require an input capacitor for stability, but TI recommends a 0.1-μF to 1-μF low-ESR ceramic capacitor placed close to the IN and GND pins. This improves source impedance, reduces high-frequency noise coupling, and enhances ripple rejection - especially critical when powered from noisy DC/DC converters upstream of the TPS79930DDCTG4.

Can the TPS79930DDCTG4 be used without connecting the NR pin?

Yes, the TPS79930DDCTG4 functions correctly with the NR pin left unconnected (open). However, output noise increases from 31.5 μV_RMS (with 0.01-μF NR cap) to ~94 × V_OUT = 282 μV_RMS. For RF, VCO, or high-resolution ADC applications, omitting the NR capacitor degrades phase noise and SNR - the NR pin is optional but strongly recommended for noise-sensitive designs using the TPS79930DDCTG4.

What is the thermal shutdown behavior of the TPS79930DDCTG4?

The TPS79930DDCTG4 activates thermal shutdown at 165°C junction temperature and resets automatically at 145°C. During shutdown, the output is disabled and ground current drops to ≤1 μA. This hysteresis prevents oscillation near trip point. In SOT-23-THIN package, R_θJA = 225.3°C/W means 200-mA load at 3.0 V (0.3-W dissipation) raises junction temperature by ~68°C above ambient - adequate margin below 165°C in typical 25°C ambient with minimal copper.

Is the TPS79930DDCTG4 pin-compatible with other TPS799 variants?

Yes, all TPS799 fixed-output versions in the DDC (SOT-23-THIN) package - including TPS79912DDCT, TPS79918DDCT, and TPS79933DDCT - share identical 5-pin pinout and footprint. The TPS79930DDCTG4 can replace any of these in hardware without PCB changes, provided input voltage, load current, and thermal constraints remain within spec. Adjustable versions (e.g., TPS79901) use FB instead of NR but occupy same physical pins.