Texas Instruments TLV71328PDBVR

Overview

TLV71328PDBVR from Texas Instruments is a capacitor-free, 150-mA, low-dropout linear regulator with fixed 2.8-V output, 1% accuracy, 230 mV dropout at full load, 50 µA quiescent current, and active output discharge. It operates from 1.4 V to 5.5 V input and delivers stable regulation for battery-powered portable electronics requiring minimal BOM count and ultra-small footprint.

For engineers reviewing the TLV71328PDBVR datasheet, TLV71328PDBVR pinout, TLV71328PDBVR application, or TLV71328PDBVR equivalent, key selection criteria include its capacitor-free stability, foldback current limiting, active pulldown capability, thermal shutdown behavior, and compatibility with space-constrained 1-mm × 1-mm X2SON packaging.

Technical Context

The TLV71328PDBVR implements a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current blocking. Its internal foldback current limit reduces power dissipation during overload or short-circuit events by decreasing output current as voltage collapses - critical for protecting Li-ion cells in portable systems.

Unlike traditional LDOs, it achieves stability without mandatory output capacitance due to integrated compensation, while remaining compatible with optional ceramic capacitors up to 100 µF. The EN pin supports logic-level control (0.9 V high threshold), and the P-suffix variant integrates an internal 120-Ω pulldown resistor on OUT for rapid discharge of downstream loads upon shutdown.

Key Specifications

Pinout & Package

TLV71328PDBVR uses the 5-pin SOT-23 (DBV) package with 2.90 mm × 1.60 mm body size and exposed thermal pad electrically tied to GND. Pin 4 is NC (no internal connection); thermal pad must be soldered to PCB ground plane for optimal thermal performance (R_θJB = 76.7°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC71328PDBVR and TPS71328PDBVR, TLV71328PDBVR uniquely balances ultra-low IQ (50 µA), guaranteed active discharge (120 Ω), and industrial-temp operation - making it optimal for consumer and industrial portable devices where battery life, board area, and safe shutdown are co-prioritized.

Availability

TLV71328PDBVR is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, industrial handheld scanners, and smart home motion detectors requiring stable component supply across long production lifecycles.

Supply support for TLV71328PDBVR 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90,000 active products and broad distribution infrastructure.

The TLV713 series was designed specifically for space- and power-constrained portable electronics, emphasizing capacitor-free stability, foldback protection, and ultra-low quiescent current - targeting battery-operated PDAs, MP3 players, PC add-in cards, and modern IoT edge nodes.

FAQ

What is the maximum input voltage rating for TLV71328PDBVR?

The absolute maximum input voltage for TLV71328PDBVR is 6 V, but the recommended operating range is 1.4 V to 5.5 V. Exceeding 6 V risks permanent damage per Absolute Maximum Ratings. For reliable operation across temperature, maintain VIN ≤ 5.5 V - especially important when used with unregulated sources like USB-C PD adapters or boost converters.

Does TLV71328PDBVR require an output capacitor to remain stable?

No, TLV71328PDBVR is explicitly designed for capacitor-free operation and remains stable with zero output capacitance. It also supports optional ceramic output capacitors from 0.1 µF to 100 µF. This eliminates a common BOM item and saves PCB area - a key advantage verified in TI's SBVS195F datasheet Figure 9 and Section 7.3.

What is the purpose of the NC pin on TLV71328PDBVR?

Pin 4 of TLV71328PDBVR is labeled NC (No Connection) and has no internal bond wire or circuit function. It must be left unconnected or tied to GND - neither configuration affects regulation, thermal performance, or reliability. This pin exists solely for mechanical symmetry in the SOT-23-5 package and is documented in the Pin Functions table on page 5 of the SBVS195F datasheet.

How does the foldback current limit behave in TLV71328PDBVR during a short circuit?

Under short-circuit conditions, TLV71328PDBVR reduces output current progressively as V_OUT drops - limiting peak short-circuit current to approximately 40 mA when V_OUT ≈ 0 V. This foldback behavior minimizes power dissipation (P = I × V) and prevents thermal shutdown cycling, preserving battery energy and device integrity - confirmed in Electrical Characteristics Table 6.5 and Figure 16 of the TLV71328PDBVR datasheet.

Can TLV71328PDBVR be used with a 1.8-V input supply?

No - TLV71328PDBVR requires a minimum input voltage of 1.4 V, but to regulate 2.8 V output, VIN must exceed V_OUT + V_DO. At 150 mA and 25°C, dropout is 230 mV, so minimum functional VIN is 3.03 V. Using 1.8 V input would place the device in dropout or undervoltage lockout, resulting in unregulated or zero output - per Recommended Operating Conditions (Section 6.3) and Dropout Voltage specifications (Table 6.5).