Texas Instruments TLV73315PDQNR3

Overview

TLV73315PDQNR3 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 1.5 V fixed output with 125 mV dropout at 300 mA, ±1.4% output accuracy, and 34 µA quiescent current - designed for space-constrained, battery-powered mobile applications including camera modules and WLAN add-on cards.

For engineers reviewing the TLV73315PDQNR3 datasheet, TLV73315PDQNR3 pinout, TLV73315PDQNR3 application, or TLV73315PDQNR3 equivalent, key selection criteria include ultra-small footprint, capacitor-free stability, active output discharge, foldback overcurrent protection, and thermal shutdown behavior under high ambient or high VIN–VOUT conditions.

Technical Context

The TLV73315PDQNR3 uses a PMOS pass transistor architecture enabling true capacitor-free operation - stable without input or output capacitors - while retaining fast transient response when ceramic COUT is added. Its enable logic features active-high EN with VEN(HI) = 0.9 V (min) and VEN(LO) = 0.35 V (max), and integrates a 120-Ω active pull-down circuit for rapid output discharge during disable.

Internally, it implements undervoltage lockout (UVLO) with rising threshold of 1.4 V and falling threshold of 1.25 V, foldback current limiting (typical short-circuit current = 170 mA at 3.3 VOUT, scaled per VOUT), and thermal shutdown activation at ~160°C with hysteresis reset at ~140°C - all operating across –40°C to +125°C junction temperature range.

Key Specifications

Pinout & Package

TLV73315PDQNR3 is housed in a 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with exposed thermal pad electrically tied to GND. The compact footprint supports high-density PCB layouts and enables direct integration into camera modules and wearable edge nodes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F0TESK and TPS7A0515PDQNR, TLV73315PDQNR3 uniquely balances 300-mA capability, 125-mV dropout, and capacitor-free operation in a 1-mm² footprint - making it optimal for consumer mobile imaging and compact wireless modules where size, simplicity, and transient performance are co-prioritized.

Availability

TLV73315PDQNR3 is available at Aetrix Electronics and suitable for mobile camera modules, WLAN add-on cards, industrial sensor nodes, and portable medical devices requiring stable component supply with consistent lead times and full traceability.

Supply support for TLV73315PDQNR3 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 specializing in analog, embedded processing, and connectivity technologies, with leadership in power management innovation since the 1980s.

The TLV733 series was engineered for ultra-compact, battery-sensitive applications - emphasizing capacitor-free design, low IQ, and fast transient response in sub-2-mm² packages for next-generation mobile and edge devices.

FAQ

What is the maximum input voltage rating for TLV73315PDQNR3?

The absolute maximum input voltage for TLV73315PDQNR3 is 6.0 V, but the recommended operating range is 1.4 V to 5.5 V. Exceeding 6.0 V risks permanent damage. For reliable operation at 1.5 V output, VIN must remain ≥1.625 V (1.5 V + 125 mV dropout) under full 300-mA load and worst-case temperature.

Does TLV73315PDQNR3 require external capacitors to operate?

No - TLV73315PDQNR3 is specifically designed for capacitor-free operation and remains stable with zero input or output capacitance. However, adding a 1-µF ceramic capacitor on OUT improves load transient response and reduces output noise, especially in systems with dynamic current demands like image sensors.

How does the enable pin (EN) function on TLV73315PDQNR3?

The EN pin is active-high: TLV73315PDQNR3 enables when EN voltage exceeds 0.9 V (VEN(HI)) and disables when EN falls below 0.35 V (VEN(LO)). There is no internal pull-down, so EN must be actively driven or externally pulled high. During disable, the 120-Ω internal pulldown discharges the output.

What is the thermal performance of TLV73315PDQNR3 in its X2SON package?

In the DQN (X2SON-4) package, TLV73315PDQNR3 has RθJA = 218.6°C/W and RθJB = 164.9°C/W. With proper thermal pad soldering to a 1-in² GND plane, it sustains 300 mA at VIN = 3.3 V and ambient ≤65°C without thermal shutdown. Derating is required above 125°C junction temperature.

Is TLV73315PDQNR3 suitable for powering analog sensor circuits?

Yes - TLV73315PDQNR3 delivers 120 µVRMS output noise (10 Hz–100 kHz) and 68 dB PSRR at 100 Hz, making it well-suited for analog sensor front-ends requiring clean 1.5 V bias. Its low dropout and fast transient response also help maintain regulation during sensor burst-read cycles.