Texas Instruments TLV75525PDYDR

Overview

TLV75525PDYDR from Texas Instruments is a 2.5V fixed-output, 500mA low-dropout linear regulator in thermally enhanced SOT-23-5 (DYD) package. It operates from 1.45V to 5.5V input, delivers ±1% output accuracy at 85°C, features 25μA typical quiescent current, and maintains regulation with only 1µF ceramic output capacitor - ideal for space-constrained battery-powered MCU core supplies.

For engineers reviewing the TLV75525PDYDR datasheet, TLV75525PDYDR pinout, TLV75525PDYDR application, or TLV75525PDYDR equivalent, key selection criteria include thermal performance (60.3°C/W R_θJA), dropout voltage (238mV max at 500mA/3.3VOUT), active output discharge, foldback current limit, and enable-controlled shutdown behavior under varying load and temperature conditions.

Technical Context

The TLV75525PDYDR employs a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR (46dB at 100kHz). Its internal bandgap reference and error amplifier deliver 1% output accuracy across –40°C to +85°C, while integrated UVLO (1.21–1.44V threshold) and thermal shutdown (165°C trip) ensure robust operation in variable-input environments.

Functional modes include normal regulation, dropout tracking, and enabled/disabled states governed by EN pin logic (V_HI = 1V, V_LO = 0.3V). The device implements monotonic soft-start, active pulldown (120Ω) during shutdown, and foldback current limiting 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

TLV75525PDYDR uses the thermally enhanced SOT-23-5 (DYD) package (2.9mm × 2.8mm) with exposed thermal pad connected internally to GND. The pad must be soldered to a large-area ground plane for optimal thermal performance (R_θJA = 60.3°C/W on EVM).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F0TESK and MCP1700T-2502E/MB, TLV75525PDYDR uniquely balances 500mA output, 25μA I_Q, EN control, active discharge, and 60.3°C/W thermal resistance in a standard SOT-23 footprint - making it optimal for industrial and portable electronics where size, efficiency, and controllability intersect.

Availability

TLV75525PDYDR is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub processors, and automotive camera ECU power designs requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for TLV75525PDYDR 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 and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.

The TLV755P series was developed to address demand for ultra-small, low-I_Q LDOs in battery-powered and space-constrained applications - delivering high accuracy, fast transient response, and thermal resilience across consumer, industrial, and automotive segments.

FAQ

What is the maximum dropout voltage specification for TLV75525PDYDR at full 500mA load?

The maximum dropout voltage for TLV75525PDYDR is 238mV at 500mA load and 3.3V output, measured over –40°C to +85°C. For its native 2.5V output, the datasheet specifies 215mV maximum under identical conditions. This value reflects worst-case silicon variation and temperature, ensuring reliable regulation even with marginal input headroom such as from aging batteries or undersized DC/DC stages.

Does TLV75525PDYDR require an external pull-up resistor on the EN pin?

No, TLV75525PDYDR does not require an external pull-up on the EN pin. It features an internal pulldown resistor (120Ω) that holds EN low during power-up, ensuring default shutdown until intentionally asserted. If always-on operation is needed, connect EN directly to IN; if controlled enable is required, drive EN with a logic signal meeting V_HI ≥ 1V and V_LO ≤ 0.3V thresholds - no external biasing components are necessary.

Can TLV75525PDYDR operate stably with less than 1µF output capacitance?

No - TLV75525PDYDR is specified and tested for stability only with ≥1µF ceramic output capacitance. The datasheet explicitly states minimum C_OUT = 1µF (with 50% derating applied), and operation below this risks oscillation or poor transient response. While some variants in the TLV755P family support 0.47µF, the TLV75525PDYDR variant requires 1µF minimum for guaranteed stability across temperature and load conditions.

How does the active output discharge function work in TLV75525PDYDR?

When EN is driven low, TLV75525PDYDR activates an internal 120Ω pulldown switch between OUT and GND. This rapidly discharges the output capacitor, bringing V_OUT to near-zero within microseconds - ensuring a known, safe startup state for downstream logic. Discharge time depends on C_OUT and parallel load resistance, calculated as τ = 120·R_L/(120 + R_L)·C_OUT. The feature eliminates need for external bleed resistors in battery-sensitive designs.

Is TLV75525PDYDR compatible with ceramic capacitors having X5R or X7R dielectrics?

Yes - TLV75525PDYDR is specifically characterized and guaranteed stable with X5R and X7R ceramic capacitors. These dielectrics provide minimal capacitance shift over temperature and DC bias, satisfying the 1µF minimum requirement even under full-rated 2.5V output. Avoid Z5U or Y5V types due to excessive DC bias derating (>70%) which may reduce effective C_OUT below the 1µF stability threshold.