Texas Instruments TLV75528PDQNR

Overview

TLV75528PDQNR from Texas Instruments is a 500mA, low-quiescent-current (25μA typical), fixed 2.8V output LDO regulator in a 1mm × 1mm X2SON-4 package. It operates from 1.45V to 5.5V input, delivers ±1% output accuracy at 85°C, and maintains regulation with only a 1µF ceramic output capacitor. It serves as a core voltage supply for microcontrollers and sensors in space-constrained portable electronics.

For engineers reviewing the TLV75528PDQNR datasheet, TLV75528PDQNR pinout, TLV75528PDQNR application, or TLV75528PDQNR equivalent, key selection criteria include its ultra-small footprint, 238mV max dropout at 500mA (3.3VOUT), active output discharge, foldback current limit, and thermal shutdown - all validated for industrial temperature range (–40°C to +125°C).

Technical Context

The TLV75528PDQNR implements a PMOS pass transistor architecture with precision band-gap reference and error amplifier, enabling 1% output accuracy across temperature and load. Its internal soft-start ensures monotonic V_OUT rise and limits inrush current during power-up.

Functional modes include normal regulation, dropout (where V_OUT tracks V_IN), and disabled state with active pulldown (120Ω internal resistor) for rapid output discharge. Protection features include undervoltage lockout (1.3V typ), thermal shutdown (165°C trip), and foldback current limiting that reduces dissipation during short-circuit events.

Key Specifications

Pinout & Package

TLV75528PDQNR 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 (top view, marking dot at Pin 1 corner).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC75528PDQNR and TPS7A0528PDQNR, TLV75528PDQNR uniquely delivers 500mA output, 25μA operating IQ, and 46dB PSRR in a 1mm² package - making it optimal for compact, battery-powered systems requiring both current headroom and efficiency.

Availability

TLV75528PDQNR is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, smart home remotes, and camera modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV75528PDQNR 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 over 90 years of innovation in power management and signal chain solutions.

The TLV755P series was designed for space-constrained, battery-powered applications demanding ultra-low IQ, small solution size, and robust protection - targeting modern MCUs, wearables, and industrial sensors.

FAQ

What is the maximum output current capability of TLV75528PDQNR?

The TLV75528PDQNR is rated for 500mA continuous output current under recommended operating conditions (T_J ≤ 125°C, V_IN ≥ V_OUT + V_DO). At 500mA and 85°C, its dropout voltage remains ≤215mV for 2.8V output. Current limit folds back below 0.4×V_OUT to reduce thermal stress during faults. TLV75528PDQNR maintains regulation up to this limit without derating in standard PCB layouts.

Does TLV75528PDQNR require an external pull-up resistor on the EN pin?

No, TLV75528PDQNR has no internal pull-up on the EN pin. However, it features an internal pulldown (120Ω) when disabled. To ensure reliable startup, drive EN directly from a GPIO or logic rail ≥1V (V_HI). If left floating, EN may float near threshold and cause erratic behavior. TLV75528PDQNR does not require external biasing unless system-level noise immunity demands a weak pull-up.

Can TLV75528PDQNR operate with a 1µF output capacitor, and what type is recommended?

Yes, TLV75528PDQNR is explicitly stable with ≥1µF ceramic output capacitors - X5R or X7R dielectrics are recommended for minimal capacitance shift over temperature and DC bias. The 1µF value satisfies both stability and transient response requirements; larger values (up to 200µF) improve ripple suppression but are not required. TLV75528PDQNR's internal compensation eliminates need for ESR tuning.

What protection features are integrated into TLV75528PDQNR?

TLV75528PDQNR integrates undervoltage lockout (1.3V typical trip), thermal shutdown (165°C trip, 155°C reset), foldback current limiting, and active output discharge. During shutdown, a 120Ω internal pulldown rapidly discharges the output capacitor. All protections operate independently and are fully specified across –40°C to +125°C junction temperature. TLV75528PDQNR does not latch off after fault recovery.

Is TLV75528PDQNR pin-compatible with other packages in the TLV755P family?

No - TLV75528PDQNR uses the 4-pin X2SON (DQN) package with pinout OUT-GND-EN-IN, while SOT-23-5 (DBV/DYD) and WSON-6 (DRV) variants have different pin counts and arrangements. For example, DBV places EN at Pin 3 but adds NC at Pin 4; DRV uses 6 pins with two NCs and thermal pad. TLV75528PDQNR requires dedicated layout and cannot be substituted without PCB revision.