Texas Instruments TLV71733PDQNR

Overview

TLV71733PDQNR from Texas Instruments is a 150-mA, low-dropout linear regulator with 3.3 V fixed output, 215 mV dropout at full load, 0.5% typical output accuracy, 35 µA quiescent current, and active pulldown for rapid output discharge. It serves as a power supply rail generator in portable electronics requiring stable low-noise voltage under light-to-moderate load.

For engineers reviewing the TLV71733PDQNR datasheet, TLV71733PDQNR pinout, TLV71733PDQNR application, or TLV71733PDQNR equivalent, key selection factors include foldback current limiting (40 mA short-circuit limit), stability with ≥0.1 µF ceramic output capacitance, 70 dB PSRR at 1 kHz, UVLO threshold of 1.6 V, and operation across –40°C to +85°C junction temperature.

Technical Context

The TLV71733PDQNR employs a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-voltage protection via its body diode. Its internal foldback current limit initiates near 350 mA and reduces output current as VOUT collapses, limiting power dissipation during shorts.

It integrates an active-high enable input (VIH = 0.9 V, VIL = 0.4 V), undervoltage lockout (1.6 V rising threshold), and an on-chip 120 Ω pulldown resistor that discharges the output when disabled - critical for sequencing and leakage-sensitive systems.

Key Specifications

Pinout & Package

TLV71733PDQNR is housed in a 1.0 mm × 1.0 mm, 4-pin X2SON (DQN) package with wettable flanks and an exposed thermal pad connected to GND for enhanced thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F3BVT and MCP1826T-3302E/DB, TLV71733PDQNR offers the smallest footprint (1 mm²), lowest quiescent current (35 µA), and integrated fault-handling features (foldback + pulldown) - making it optimal for size- and battery-life–constrained portable designs where automotive qualification is unnecessary.

Availability

TLV71733PDQNR is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor nodes, industrial handheld terminals, and point-of-sale peripherals requiring stable component supply with tight parametric consistency and long-term manufacturability.

Supply support for TLV71733PDQNR 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 designing analog ICs, embedded processors, and system solutions for industrial, automotive, and personal electronics markets.

The TLV717P series was developed specifically for portable, battery-powered applications demanding ultra-low quiescent current, small form factor, and robust fault protection - including foldback current limiting and active output discharge.

FAQ

What is the minimum input voltage required for TLV71733PDQNR to regulate 3.3 V output?

The TLV71733PDQNR requires a minimum input voltage of 3.515 V to maintain regulation at 150 mA load, based on its 215 mV dropout specification. At lighter loads, dropout decreases - e.g., ~100 mV at 10 mA - allowing regulation from as low as 3.4 V. Input must also exceed the 1.6 V UVLO threshold for initial startup.

Does TLV71733PDQNR require an external pull-up resistor on the EN pin?

No, TLV71733PDQNR does not require an external pull-up on EN. Its enable input has CMOS-compatible thresholds (VIH = 0.9 V, VIL = 0.4 V) and draws only 0.01 µA. It can be driven directly by microcontroller GPIOs or tied to IN for always-on operation. An external pull-up is only needed if the driving source cannot guarantee VIH/VIL levels.

Can TLV71733PDQNR be used with a 0.1 µF output capacitor?

Yes, TLV71733PDQNR is stable with an effective output capacitance of 0.1 µF or greater - meaning the capacitor's actual value under operating bias and temperature must meet or exceed 0.1 µF. A 1 µF X5R/X7R ceramic capacitor is recommended for robustness; a rated 0.1 µF part may fall below 0.1 µF due to DC bias derating and is not advised.

What happens to the output of TLV71733PDQNR when the EN pin is pulled low?

When EN is pulled below 0.4 V, TLV71733PDQNR enters shutdown mode, reducing ground current to ≤0.5 µA. Its internal 120 Ω pulldown resistor actively discharges the OUT pin to GND, ensuring rapid and controlled voltage decay - critical for preventing latch-up or false triggering in downstream circuits.

Is TLV71733PDQNR compatible with ceramic capacitors having high DC bias derating?

Yes, TLV71733PDQNR is explicitly designed to remain stable with the effective capacitance - i.e., the value after accounting for DC bias and temperature derating. This allows use of small-footprint, high-bias-derating ceramics (e.g., 0402 2.2 µF X5R), provided their effective value at operating voltage and temperature stays ≥0.1 µF.