Texas Instruments TLV73330PDQNR

Overview

TLV73330PDQNR 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 3.3 V output with 125 mV dropout at 300 mA, ±1.4% output accuracy, and 34 µA quiescent current. It enables compact, low-power power management in space-constrained portable electronics where output capacitor elimination reduces solution size and eliminates inrush current.

For engineers reviewing the TLV73330PDQNR datasheet, TLV73330PDQNR pinout, TLV73330PDQNR application, or TLV73330PDQNR equivalent, key selection criteria include capacitor-free stability, active output discharge, foldback overcurrent protection, thermal shutdown behavior, and compatibility with battery-powered systems requiring fast startup (<800 µs to 98% of 3.3 V) and low-noise regulation.

Technical Context

The TLV73330PDQNR uses a PMOS pass transistor architecture with undervoltage lockout (UVLO) activation at 1.3 V (rising) and 1.25 V (falling), enabling reliable start-up under weak or recovering input sources. Its enable pin (EN) operates with logic-compatible thresholds: VEN(HI) = 0.9 V min and VEN(LO) = 0.35 V max, supporting direct connection to microcontroller GPIOs without level-shifting.

It integrates an active pull-down circuit (120 Ω) for rapid output discharge during disable, and employs foldback current limiting-reducing output current as VOUT collapses-to limit power dissipation during short-circuit faults. Thermal shutdown triggers at ~160°C and resets at ~140°C, providing cyclic fault protection without external components.

Key Specifications

Pinout & Package

TLV73330PDQNR is housed in a 4-pin, 1.0-mm × 1.0-mm X2SON (DQN) package with exposed thermal pad electrically tied to GND. The package supports high-density PCB layouts and offers R_θJA = 218.6°C/W for efficient thermal dissipation in thin-profile designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC73333PDQNR and MCP1703-3302E/MB, TLV73330PDQNR uniquely combines capacitor-free stability, active discharge, and 300 mA drive in a 1-mm² package - making it optimal for next-generation wearables and compact IoT edge nodes where layout area and dynamic power control are critical.

Availability

TLV73330PDQNR is available at Aetrix Electronics and suitable for smartphone baseband power, WLAN module core supply, industrial camera sensor bias, and USB-C PD controller auxiliary rail applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLV73330PDQNR 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 expertise and broad automotive, industrial, and consumer qualification.

The TLV733 series was engineered specifically for ultra-low-power, space-constrained portable electronics - prioritizing capacitor-free operation, fast enable response, and robust fault protection without compromising accuracy or noise performance.

FAQ

What is the minimum input voltage required for TLV73330PDQNR to regulate 3.3 V output?

The TLV73330PDQNR requires a minimum input voltage of 3.425 V to maintain regulation at 300 mA load, based on its 125 mV dropout specification. Below this, the device enters dropout mode where VOUT = VIN – VDO. UVLO prevents regulation entirely below 1.3 V (rising threshold), ensuring predictable startup behavior.

Does TLV73330PDQNR require external capacitors for stability?

No - TLV73330PDQNR is designed for capacitor-free operation and remains stable with zero input or output capacitance. This eliminates BOM cost and board area. However, a 1-µF ceramic capacitor may be added to OUT for improved load transient response, and is recommended for applications with high di/dt loads.

How does the active output discharge function in TLV73330PDQNR?

When TLV73330PDQNR is disabled via the EN pin, an internal 120-Ω pulldown resistor connects OUT to GND. Discharge time depends on COUT and parallel load resistance (τ ≈ 120 Ω × COUT || RL). For example, with 1 µF and no load, discharge to 10% VOUT takes ~276 µs - enabling safe state transitions in multi-rail systems.

What protection features are integrated into TLV73330PDQNR?

TLV73330PDQNR integrates foldback overcurrent protection (limiting short-circuit current to ~170 mA at 3.3 V), thermal shutdown (trip at ~160°C, reset at ~140°C), undervoltage lockout (UVLO), and active output discharge. These operate autonomously without external components, enhancing system reliability in unattended or battery-powered deployments.

Can TLV73330PDQNR be used with input voltages above 5.5 V?

No - the absolute maximum input voltage for TLV73330PDQNR is 6.0 V, but the recommended operating range is strictly 1.4 V to 5.5 V. Exceeding 5.5 V risks permanent damage. For higher-input applications, consider using an upstream buck converter or a different LDO rated for wider VIN range, such as TPS7A05.