Texas Instruments TLV73328PDQNR

Overview

TLV73328PDQNR from Texas Instruments is a capacitor-free, 300-mA low-dropout linear regulator (LDO) in a 1.0-mm × 1.0-mm X2SON-4 package, delivering 2.8 V output with 1.4% max accuracy, 125 mV dropout at 300 mA (V_OUT = 3.3 V), and 34 µA quiescent current - designed for space-constrained, battery-powered mobile applications including smartphone camera modules and WLAN add-on cards.

For engineers reviewing the TLV73328PDQNR datasheet, TLV73328PDQNR pinout, TLV73328PDQNR application, or TLV73328PDQNR equivalent, this page provides verified functional identity, validated X2SON-4 pin mapping, confirmed capacitor-free stability, exact dropout vs. load behavior at 2.8 V, and two technically documented alternative LDOs for portable power-rail design.

Technical Context

The TLV73328PDQNR implements a PMOS pass transistor architecture with undervoltage lockout (UVLO) activation at 1.3 V (rising) and 1.25 V (falling), active-high enable logic (VEN(HI) = 0.9 V, VEN(LO) = 0.35 V), and foldback current limiting that reduces output current as V_OUT collapses - enabling robust short-circuit protection without external circuitry.

It features an integrated 120-Ω active pull-down circuit for rapid output discharge during shutdown, operates across –40°C to +125°C junction temperature, and maintains stability with or without output capacitance - eliminating inrush current and reducing BOM count in ultra-compact designs.

Key Specifications

Pinout & Package

TLV73328PDQNR uses the DQN (X2SON-4) package: 1.0 mm × 1.0 mm body, 0.4 mm pitch, thermally enhanced bottom-side exposed pad electrically tied to GND. Recommended PCB layout includes ≥25 mm² GND copper pour under the thermal pad for optimal θ_JB = 164.9°C/W performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC73328PDBVR and TPS73328DRVR, TLV73328PDQNR uniquely combines capacitor-free stability, active output discharge, and industry-leading 34-µA IQ in the smallest 1.0-mm × 1.0-mm footprint - making it optimal for next-generation compact, battery-sensitive systems where solution size and power sequencing integrity are non-negotiable.

Availability

TLV73328PDQNR is available at Aetrix Electronics and suitable for smartphone camera modules, WLAN add-on cards, industrial handheld scanners, portable medical sensor hubs, and other applications requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TLV73328PDQNR 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 and embedded processing technologies, with decades of LDO design heritage and broad automotive, industrial, and personal electronics validation.

The TLV733 series was engineered specifically for ultra-compact, battery-powered consumer electronics - emphasizing capacitor-free operation, ultra-low IQ, and fast transient response in sub-1-mm² packages for camera, audio, and connectivity subsystems.

FAQ

Does TLV73328PDQNR require input or output capacitors to operate stably?

No - TLV73328PDQNR uses a capacitor-free architecture and remains stable with zero input or output capacitance. This eliminates inrush current at startup and reduces bill-of-materials count. A 1-µF ceramic output capacitor may be added to improve load-transient response, but it is not required for stability. The device's internal compensation ensures phase margin across all operating conditions without external components.

What is the maximum dropout voltage of TLV73328PDQNR at 300 mA and 2.8 V output?

For TLV73328PDQNR (2.8 V fixed version), the maximum dropout voltage is 270 mV at 300 mA over –40°C to +85°C, per TI's Electrical Characteristics table. At room temperature and 300 mA, typical dropout is ~240 mV. This enables reliable regulation from a 3.0-V minimum Li-ion battery voltage with 200-mV headroom.

How does the enable pin (EN) of TLV73328PDQNR behave during power-up and shutdown?

The EN pin of TLV73328PDQNR is active-high with V_EN(HI) = 0.9 V (min) and V_EN(LO) = 0.35 V (max). When EN rises above 0.9 V, TLV73328PDQNR starts regulating within 800 µs (for 3.3 V version; 2.8 V timing is comparable). When EN falls below 0.35 V, the internal 120-Ω pulldown engages, discharging the output within milliseconds - ensuring controlled power-down without floating nodes.

Can TLV73328PDQNR safely drive a short-circuited output?

Yes - TLV73328PDQNR incorporates foldback current limiting and thermal shutdown. Under short-circuit, output current drops to ~150–170 mA (depending on V_OUT), limiting power dissipation. If junction temperature reaches ~160°C, thermal shutdown disables the output; recovery occurs at ~140°C. This protects the device during sustained faults without external current-sense circuitry.

Is TLV73328PDQNR compatible with PCB assembly processes using lead-free reflow profiles?

Yes - TLV73328PDQNR is qualified for standard lead-free reflow per JEDEC J-STD-020, with peak temperature rating of 260°C. Its X2SON-4 package has MSL 1 rating (unlimited floor life at ≤30°C/85% RH), and the thermal pad design supports robust solder joint formation under IPC-A-610 Class 2/3 requirements.