Texas Instruments TLV74225PDQNR

Overview

TLV74225PDQNR from Texas Instruments is a 2.5-V fixed-output, 200-mA low-dropout linear voltage regulator (LDO) in a 1-mm × 1-mm X2SON-4 package. It operates from 2 V to 5.5 V input, delivers 0.5% output accuracy, achieves 55 dB PSRR at 1 MHz, and draws only 25 µA quiescent current when enabled-ideal for post-regulation of DC-DC outputs in space-constrained portable RF systems.

For engineers reviewing the TLV74225PDQNR datasheet, TLV74225PDQNR pinout, TLV74225PDQNR application, or TLV74225PDQNR equivalent, key selection criteria include dropout voltage at 150 mA (220–270 mV), active output discharge via 120-Ω internal pulldown, thermal shutdown behavior, and compatibility with ≥0.1-µF ceramic output capacitors under bias.

Technical Context

The TLV74225PDQNR uses a PMOS pass transistor architecture enabling ultra-low dropout (e.g., 45 mV at 30 mA for 2.8 V output) and stable operation with minimal output capacitance (≥0.1 µF effective). Its enable circuitry features TTL-compatible thresholds: VIH(EN) = 0.9 V (min), VIL(EN) = 0.4 V (max), supporting direct microcontroller GPIO control without level shifting.

It integrates overcurrent protection with 240–450 mA current limit and thermal shutdown triggered at ~160°C junction temperature, with automatic recovery at ~140°C. The exposed thermal pad is electrically tied to GND and must be soldered to the PCB ground plane for RθJB = 117.2°C/W thermal performance.

Key Specifications

Pinout & Package

TLV74225PDQNR is housed in a 4-pin, 1.0 mm × 1.0 mm X2SON (DQN) package with an exposed thermal pad electrically connected to GND. The compact footprint minimizes PCB area while enabling high thermal efficiency via direct GND-plane coupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F0TESA1 and MCP1700T-2502E/MB, TLV74225PDQNR uniquely balances ultra-small size, 200-mA capability, active discharge, and 25-µA I_Q-making it optimal for portable, battery-powered systems where board area and controlled shutdown behavior are critical.

Availability

TLV74225PDQNR is available at Aetrix Electronics and suitable for point-of-sale terminals, camera modules, gaming peripherals, building automation sensors, and TV/STB subsystems requiring stable component supply across production lifecycles.

Supply support for TLV74225PDQNR 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 and embedded processing technologies, with leadership in power management ICs and high-reliability design.

The TLV742P series-including TLV74225PDQNR-is engineered for portable, space-constrained applications demanding low noise, low I_Q, and robust protection in minimal footprints.

FAQ

What is the recommended output capacitor for stable operation of TLV74225PDQNR?

The TLV74225PDQNR is stable with a minimum 0.1-µF effective ceramic output capacitance (X5R/X7R) under operating bias and temperature. For guaranteed performance across all conditions, TI recommends a 1-µF ceramic capacitor placed within 10 mm of the OUT pin. This ensures adequate phase margin, fast transient response, and suppression of output voltage overshoot during load steps-critical for powering sensitive analog circuits in the TLV74225PDQNR application.

Does TLV74225PDQNR support active output discharge, and how does it function?

Yes, TLV74225PDQNR includes an internal 120-Ω active pulldown resistor between OUT and GND during shutdown. When EN is driven below 0.4 V, the regulator disables and engages this path, discharging the output capacitor with a time constant τ ≈ 120 Ω × C_OUT. This prevents floating outputs that could cause unintended logic states or latch-up in downstream components-a key requirement in the TLV74225PDQNR application for systems with strict power sequencing.

What is the maximum allowable input voltage for TLV74225PDQNR, and what happens beyond that?

The absolute maximum input voltage for TLV74225PDQNR is 6 V. Operation above 5.5 V (recommended max) risks permanent damage, as specified in the Absolute Maximum Ratings table. Exceeding 6 V violates stress limits and may cause gate oxide breakdown in the PMOS pass device. For reliable TLV74225PDQNR operation in systems with variable input sources (e.g., USB or Li-ion), ensure input filtering and clamping to stay within 2–5.5 V nominal range.

How does TLV74225PDQNR perform under thermal stress, and what protection mechanisms activate?

TLV74225PDQNR incorporates thermal shutdown that activates at ~160°C junction temperature and recovers at ~140°C. During sustained overload or high ambient temperature, the device cycles between regulation and shutdown to limit power dissipation. Its RθJB of 117.2°C/W (with proper thermal pad soldering) ensures safe operation up to 125°C ambient at full 200-mA load-making TLV74225PDQNR suitable for thermally dense layouts in compact consumer electronics.

Can TLV74225PDQNR be used without an enable signal, and how is that implemented?

Yes, TLV74225PDQNR can operate without external enable control by connecting the EN pin directly to the IN pin. This configures the device for always-on operation, eliminating the need for GPIO resources or pull-up resistors. In this mode, the regulator powers up immediately when input voltage exceeds 2 V and remains active until input drops below the undervoltage lockout threshold-providing simple, robust power delivery for non-sequenced subsystems in the TLV74225PDQNR application.