Texas Instruments TLV74229PDQNR

Overview

TLV74229PDQNR from Texas Instruments is a 200-mA, low-dropout linear voltage regulator (LDO) with fixed 2.9-V output, optimized for space-constrained portable RF systems. It operates from 2 V to 5.5 V input, delivers 0.5% typical output accuracy, achieves 55 dB PSRR at 1 MHz, and consumes only 25 µA quiescent current when enabled - enabling stable, low-noise power for battery-powered camera modules and point-of-sale terminals.

For engineers reviewing the TLV74229PDQNR datasheet, TLV74229PDQNR pinout, TLV74229PDQNR application, or TLV74229PDQNR equivalent, key selection criteria include its 1-mm × 1-mm X2SON package, active output discharge (120-Ω pulldown), thermal/overcurrent protection, and compatibility with ≥0.1-µF ceramic output capacitors under bias.

Technical Context

The TLV74229PDQNR uses a PMOS pass transistor architecture to achieve ultra-low dropout - as low as 40 mV at 30 mA and 200 mV at 150 mA for 2.9-V output - enabling efficient regulation from single-cell Li-ion sources down to 0.85 V. Its internal bandgap reference and error amplifier deliver tight DC accuracy and fast transient response.

It integrates an active-high enable pin (VIH = 0.9 V, VIL = 0.4 V), thermal shutdown (~160°C trip), foldback current limiting (240–450 mA), and an internal 120-Ω output pulldown resistor activated during shutdown - ensuring rapid, controlled discharge of downstream capacitance in sleep-mode applications.

Key Specifications

Pinout & Package

The TLV74229PDQNR is housed in a 1.00 mm × 1.00 mm, 4-pin X2SON (DQN) package with an exposed thermal pad electrically tied to GND - requiring PCB thermal via connection to maximize power dissipation capability (R_θJB = 117.2°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC74229PDQNR and MCP1702T-2902E/MB, TLV74229PDQNR uniquely combines ultra-small X2SON packaging, integrated active discharge, and comprehensive protection - making it optimal for next-generation compact, battery-powered edge devices requiring robust, low-noise regulation.

Availability

TLV74229PDQNR is available at Aetrix Electronics and suitable for point-of-sale terminals, camera modules, gaming peripherals, building automation sensors, and TV/STB power management requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for TLV74229PDQNR 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 expertise in precision power management ICs.

The TLV742P series was designed specifically for portable, battery-powered applications demanding ultra-low IQ, small size, and high PSRR - targeting camera modules, wearables, and IoT endpoints where efficiency and noise performance are critical.

FAQ

What is the output voltage tolerance of the TLV74229PDQNR over temperature and load?

The TLV74229PDQNR guarantees ±1.5% output voltage accuracy over –40°C to +125°C junction temperature and 0–200 mA load range, with typical accuracy of 0.5%. This specification is verified per TI's SBVS323 datasheet Section 6.5, ensuring reliable biasing for precision analog circuits without external trimming.

Does the TLV74229PDQNR require an external pull-up on the EN pin?

No - the TLV74229PDQNR does not require an external pull-up on EN. Its enable pin has no internal pull-up; however, the device remains functional when EN is tied directly to IN for permanent enable. For controlled shutdown, drive EN ≥0.9 V to turn on and ≤0.4 V to disable - no external resistor needed unless interfacing with open-drain logic.

Can the TLV74229PDQNR operate with less than 1-µF output capacitance?

Yes - the TLV74229PDQNR is stable with ≥0.1 µF effective ceramic capacitance at the OUT pin, provided ESR remains <200 mΩ. This allows use of smaller 0402/0201 capacitors derated for bias and temperature - unlike older LDOs requiring 1 µF minimum. Always verify effective capacitance under actual operating voltage and temperature.

What thermal protection behavior does the TLV74229PDQNR exhibit under overload?

Under sustained overload, the TLV74229PDQNR activates thermal shutdown at ~160°C junction temperature, disabling output until junction cools to ~140°C, then auto-restarts. This hiccup-mode cycling prevents permanent damage while maintaining system awareness - documented in Section 7.3.1 and Figure 43 of the SBVS323 datasheet.

Is the thermal pad of the TLV74229PDQNR electrically isolated?

No - the exposed thermal pad of the TLV74229PDQNR is electrically connected to the GND pin, as confirmed in Pin Functions (Section 5) of the SBVS323 datasheet. It must be soldered to a PCB ground plane using ≥4 thermal vias to ensure both thermal performance (R_θJB = 117.2°C/W) and electrical integrity.