Texas Instruments TLV75528PDYDR

Overview

TLV75528PDYDR from Texas Instruments is a 500mA, low-quiescent-current (25μA typical), fixed 2.8V output LDO regulator in thermally enhanced SOT-23-5 (DYD) package with exposed thermal pad. It operates from 1.45V to 5.5V input, delivers ≤1% output accuracy at 85°C, and maintains regulation with only 1µF ceramic output capacitor - ideal for space-constrained, battery-powered MCU core supplies.

For engineers reviewing the TLV75528PDYDR datasheet, TLV75528PDYDR pinout, TLV75528PDYDR application, or TLV75528PDYDR equivalent, key selection criteria include its 238mV max dropout at 500mA (3.3VOUT), active output discharge, foldback current limit, and 60.3°C/W R_θJA on EVM - all critical for portable power integrity and thermal management in compact designs.

Technical Context

The TLV75528PDYDR implements a PMOS pass transistor architecture with precision band-gap reference and error amplifier, enabling 1% output accuracy across –40°C to +85°C. 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, thermal shutdown at 165°C (reset at 155°C), and foldback current limiting that reduces dissipation during short-circuit events - all integrated without external components.

Key Specifications

Pinout & Package

SOT-23-5 package with exposed thermal pad (DYD variant), 2.9mm × 2.8mm footprint. Thermal pad must be connected 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 TLC75528DBVR and TPS7A2428PDBVR, TLV75528PDYDR uniquely combines 500mA capability, active output discharge, and 60.3°C/W thermal resistance in a 2.9mm × 2.8mm footprint - making it the only option among the three capable of full-rated current in thermally constrained portable and industrial edge-node designs.

Availability

TLV75528PDYDR is available at Aetrix Electronics and suitable for portable MCU power, IoT sensor node supply, white goods control boards, industrial HMI displays, and battery-backed real-time clock circuits requiring stable component supply and long-term manufacturability.

Supply support for TLV75528PDYDR 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 LDO design expertise and broad automotive, industrial, and consumer qualification.

The TLV755P family was engineered for ultra-small, low-I_Q power management in space- and energy-constrained applications - targeting next-generation portable electronics, wearables, and intelligent edge sensors demanding high accuracy and thermal resilience.

FAQ

What is the maximum dropout voltage specification for TLV75528PDYDR at full 500mA load?

The TLV75528PDYDR has a maximum dropout voltage of 238mV at 500mA load when regulating a 3.3V output. For its specific 2.8V output version, the datasheet specifies ≤220mV under identical test conditions (–40°C to +85°C). This value ensures reliable operation from 3.0V input sources like partially discharged Li-ion cells while maintaining regulation.

Does TLV75528PDYDR require an external pull-down resistor on the EN pin?

No, TLV75528PDYDR does not require an external pull-down resistor on the EN pin. It features an internal enable circuit with defined V_HI (1V) and V_LO (0.3V) thresholds and negligible input leakage (10nA typical). The EN pin can be driven directly from a microcontroller GPIO without external components - simplifying layout and reducing BOM count.

How does the active output discharge function work in TLV75528PDYDR during shutdown?

When TLV75528PDYDR is disabled via the EN pin, an internal 120Ω switch connects the OUT pin to GND. This actively discharges the output capacitor, ensuring the output falls rapidly to near-zero volts. This behavior guarantees a known low-impedance start-up state and prevents unintended operation of downstream circuitry - a critical feature for systems requiring deterministic power sequencing.

Can TLV75528PDYDR operate stably with less than 1µF output capacitance?

No, TLV75528PDYDR requires a minimum of 1µF ceramic output capacitance for guaranteed stability across all operating conditions. The datasheet specifies 0.47µF as the absolute minimum effective capacitance at the pin (accounting for DC bias derating), but recommends ≥1µF nominal to ensure margin. Using less risks oscillation, poor transient response, or startup failure - especially with X5R/X7R dielectrics at rated voltage.

What thermal performance advantage does the DYD package of TLV75528PDYDR provide over standard SOT-23-5 variants?

The DYD package of TLV75528PDYDR integrates an exposed thermal pad internally connected to GND, achieving 60.3°C/W junction-to-ambient thermal resistance on the LP087A evaluation module - a 40% improvement over the 100.8°C/W of the standard DBV SOT-23-5 variant. This allows TLV75528PDYDR to sustain full 500mA output current at higher ambient temperatures or in smaller PCB areas without thermal throttling.