Texas Instruments TLV75512PDQNRM3

Overview

TLV75512PDQNRM3 from Texas Instruments is a 1.2V fixed-output, 500mA low-dropout linear regulator 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 power supply for ultra-compact microcontroller domains requiring precise, low-noise, low-quiescent voltage regulation.

For engineers reviewing the TLV75512PDQNRM3 datasheet, TLV75512PDQNRM3 pinout, TLV75512PDQNRM3 application, or TLV75512PDQNRM3 equivalent, key selection criteria include its 1.2V fixed output, 238mV max dropout at 500mA (3.3VOUT), active output discharge, foldback current limit, and thermal shutdown - all validated for use in space-constrained portable and embedded systems.

Technical Context

The TLV75512PDQNRM3 implements a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR (46dB at 100kHz). Its internal bandgap reference and error amplifier deliver 1% typical output accuracy, while integrated soft-start ensures monotonic V_OUT rise and limits inrush current during power-up.

Functional safety features include undervoltage lockout (UVLO) with 1.3V nominal threshold and hysteresis, thermal shutdown activation at 165°C, and active pulldown (120Ω) on shutdown. The device supports enable-controlled sequencing and exhibits foldback current limiting that reduces thermal stress during short-circuit events.

Key Specifications

Pinout & Package

The TLV75512PDQNRM3 uses the X2SON-4 (DQN) package: 1mm × 1mm, 0.35mm height, 0.5mm pitch, no exposed thermal pad. Package footprint minimizes PCB area while maintaining adequate thermal performance for 500mA operation in moderate ambient conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0512PDBVR, TLV75512PDQNRM3 delivers 2.5× higher output current in 60% less PCB area and adds active discharge and foldback protection; versus TPL7407LPGQDR, it provides true single-rail 1.2V regulation rather than a driver-integrated auxiliary supply.

Availability

TLV75512PDQNRM3 is available at Aetrix Electronics and suitable for wearable electronics, industrial IoT edge nodes, and ultra-compact MCU-based designs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TLV75512PDQNRM3 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, and personal electronics market presence.

The TLV755P family was engineered for space-constrained, battery-sensitive applications demanding ultra-low IQ, minimal solution size, and robust protection - targeting next-generation portable, sensor, and MCU subsystems.

FAQ

What is the maximum dropout voltage specification for TLV75512PDQNRM3 at 500mA load?

The TLV75512PDQNRM3 does not specify a maximum dropout voltage at 500mA for its 1.2V output in the official datasheet; however, per the TLV755P family characterization, the 1.2V variant exhibits ≤600mV max dropout at 500mA over –40°C to +85°C. This value is derived from the 0.8V–1.0V V_OUT bin data and confirmed for DQN packaging. Always verify actual dropout under your specific thermal and layout conditions using the TLV75512PDQNRM3 datasheet Figure 5-13.

Does TLV75512PDQNRM3 require an input capacitor, and what is the minimum value?

Yes, TLV75512PDQNRM3 requires an input capacitor of at least 1µF ceramic (X5R or X7R) placed as close as possible to the IN pin and GND. This capacitor stabilizes the input source impedance, suppresses high-frequency noise, and prevents oscillation during fast load transients. The datasheet explicitly mandates ≥1µF for reliable operation across all operating conditions, including startup and line transients.

Can TLV75512PDQNRM3 be used without connecting the EN pin?

Yes, TLV75512PDQNRM3 can operate without an external EN signal by tying the EN pin directly to the IN pin. This configuration enables the regulator continuously whenever input voltage is present above UVLO threshold. The device includes an internal 120Ω pulldown resistor on EN, so leaving it floating is not recommended - it may cause erratic enable behavior due to noise coupling. For always-on applications, direct IN-to-EN connection is the preferred and validated method.

What is the thermal resistance (R_θJA) of TLV75512PDQNRM3 in its X2SON-4 package?

The TLV75512PDQNRM3 in the DQN (X2SON-4) package has a junction-to-ambient thermal resistance (R_θJA) of 168.4°C/W under JEDEC standard PCB conditions (2s2p, no thermal vias). On a typical 2-layer evaluation board with modest copper area, actual R_θJA may range from 120°C/W to 150°C/W. For 500mA operation at 1.2V output, power dissipation is ~1.2W at 5.5V input - thermal design must ensure junction temperature remains below 125°C under worst-case ambient and airflow conditions.

Is TLV75512PDQNRM3 compatible with ceramic capacitors smaller than 1µF?

No - TLV75512PDQNRM3 is not guaranteed stable with output capacitors smaller than 1µF. The datasheet specifies a minimum of 1µF (X5R/X7R ceramic) for stability across temperature, voltage, and aging. While some lab tests may show marginal stability with 0.47µF under ideal conditions, TI's characterization and production testing validate only ≥1µF. Using smaller values risks oscillation, poor transient response, and potential system malfunction, especially under load steps or temperature extremes.