Texas Instruments TLV75512PDQNR

Overview

TLV75512PDQNR from Texas Instruments is a 1.2V fixed-output, 500mA low-dropout linear regulator (LDO) in a 1mm × 1mm X2SON-4 package. It operates from 1.45V to 5.5V input, delivers ±1.2% output accuracy over –40°C to +85°C, features 25μA typical quiescent current, and maintains stability with only a 1µF ceramic output capacitor. It serves as a core voltage supply for ultra-low-power microcontrollers in space-constrained portable electronics.

For engineers reviewing the TLV75512PDQNR datasheet, TLV75512PDQNR pinout, TLV75512PDQNR application, or TLV75512PDQNR equivalent, key selection criteria include dropout voltage at 500mA (≤238mV for 3.3VOUT variants; actual value for 1.2VOUT is 550–780mV depending on temperature), active output discharge, foldback current limiting, thermal shutdown (165°C), and compatibility with 0.47–200µF ceramic capacitors.

Technical Context

The TLV75512PDQNR implements a PMOS pass transistor architecture with precision band-gap reference and error amplifier, enabling tight 1.2V output regulation across load (0–500mA) and line (1.45–5.5V) variations. Its internal soft-start ensures monotonic V_OUT rise and limits inrush current during power-up.

Functional safety features include undervoltage lockout (UVLO with 1.21–1.44V threshold and 40mV hysteresis), active pulldown (120Ω resistor to GND when disabled), and foldback current limit that reduces output current as V_OUT drops below 0.4×V_OUT(NOM), minimizing thermal stress during short-circuit events.

Key Specifications

Pinout & Package

TLV75512PDQNR uses the X2SON-4 (DQN) package: 1mm × 1mm, 0.35mm pitch, no exposed thermal pad. Pin 1 = OUT, Pin 2 = GND, Pin 3 = EN, Pin 4 = IN. The package supports ultra-dense PCB layouts and automated optical inspection (AOI).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV75512PDQNR, TPL7407LPWPR serves a fundamentally different function (driver + 5V LDO), while TPS7A0512PDBVR trades 3× lower current capability and 8× larger footprint for marginally simpler qualification-neither offers the same combination of 500mA, 1.2V, X2SON-4, and active discharge.

Availability

TLV75512PDQNR is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, smart home edge nodes, and industrial wireless transceivers requiring stable component supply with guaranteed long-term availability.

Supply support for TLV75512PDQNR 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, embedded processing, and connectivity technologies, with decades of LDO design expertise and broad automotive/industrial qualification.

The TLV755P family was engineered for ultra-low-power, space-constrained applications-including battery-powered IoT endpoints and portable consumer electronics-where minimal quiescent current, small footprint, and robust protection features are mandatory.

FAQ

What is the maximum input voltage rating for TLV75512PDQNR?

The absolute maximum input voltage for TLV75512PDQNR is 6.0V. However, the recommended operating range is 1.45V to 5.5V. Exceeding 6.0V risks permanent damage per the Absolute Maximum Ratings table. Operation above 5.5V is not characterized and may degrade output accuracy, PSRR, or thermal performance.

Does TLV75512PDQNR require an input capacitor, and what value is recommended?

Yes, TLV75512PDQNR requires an input capacitor of at least 1µF ceramic (X5R/X7R) placed close to the IN and GND pins. This capacitor stabilizes the input rail during load transients and reduces high-frequency noise coupling. TI specifies a minimum of 1µF, with effective capacitance ≥0.47µF after DC bias derating.

How does the active output discharge function work in TLV75512PDQNR?

When TLV75512PDQNR is disabled via the EN pin, an internal switch connects the OUT pin to GND through a 120Ω resistor. This actively discharges the output capacitor, bringing V_OUT to near-zero volts rapidly. This ensures a known power-down state and prevents unintended wake-up or latch-up in downstream logic circuits.

What is the thermal resistance (RθJA) of TLV75512PDQNR in its X2SON-4 package?

The JEDEC-standard RθJA for TLV75512PDQNR in the DQN (X2SON-4) package is 168.4°C/W. This value assumes a 2-layer PCB with no thermal vias. Actual thermal performance improves significantly with PCB copper area connected to the package perimeter and thermal vias to inner ground planes.

Can TLV75512PDQNR be used with output capacitors larger than 1µF?

Yes, TLV75512PDQNR is stable with output capacitors up to 200µF. Larger values improve transient response and reduce output ripple but increase start-up time and inrush current. TI recommends staying within 1–200µF and using X5R/X7R dielectrics to maintain capacitance over temperature and DC bias.