Texas Instruments TPS73525DRBRG4

Overview

TPS73525DRBRG4 from Texas Instruments is a fixed-output 2.5-V, 500-mA low-dropout linear regulator with enable (EN) and noise-reduction (NR) pin, designed for precision analog and RF power supply rails requiring ultra-low noise (13.2 μV_RMS), high PSRR (68 dB at 1 kHz), and low quiescent current (45 μA). It operates from 2.7 V to 6.5 V input and delivers stable output with only a 2.2-μF ceramic capacitor.

For engineers reviewing the TPS73525DRBRG4 datasheet, TPS73525DRBRG4 pinout, TPS73525DRBRG4 application, or TPS73525DRBRG4 equivalent, key selection criteria include dropout voltage (280 mV @ 500 mA), thermal shutdown (165°C), UVLO threshold (2.2 V), and compatibility with WSON-6 packaging for space-constrained PCB layouts.

Technical Context

The TPS73525DRBRG4 uses a PMOS pass transistor architecture enabling low dropout and high PSRR via a high-gain, high-bandwidth error amplifier. Its fixed 2.5-V output is internally trimmed using a precision 1.208-V bandgap reference, achieving ±2% DC accuracy over load, line, and temperature (–40°C to +125°C).

It integrates active features including quick-start circuitry for NR-capacitor charging, thermal shutdown (165°C trip, 145°C reset), undervoltage lockout (2.2 V rising threshold), and internal current limiting (800–1900 mA). The NR pin supports feed-forward noise reduction with up to 10 nF capacitor, reducing output noise to 13.2 μV_RMS.

Key Specifications

Pinout & Package

TPS73525DRBRG4 is packaged in a 2-mm × 2-mm WSON-6 package with exposed thermal pad (DRB suffix per TI documentation), optimized for thermal performance and compact layout in high-density designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS73525DRBRG4, TPL7407LPWPR trades noise performance and flexibility for integrated driver functionality, while TPS7A2025PDQNR offers superior noise and quiescent current at reduced output current capacity-making each suitable only for distinct design constraints.

Availability

TPS73525DRBRG4 is available at Aetrix Electronics and suitable for post DC-DC ripple filtering, IP network cameras, and macro base stations requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS73525DRBRG4 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 heritage and automotive-grade reliability validation.

The TPS735 family was engineered for RF and precision analog applications demanding simultaneous low noise, high PSRR, and low quiescent current-targeting infrastructure, imaging, and industrial sensing systems.

FAQ

What is the maximum input voltage rating for the TPS73525DRBRG4?

The TPS73525DRBRG4 has an absolute maximum input voltage of 7 V, but its recommended operating input range is 2.7 V to 6.5 V. Exceeding 6.5 V may degrade PSRR and increase dropout, while operation below 2.7 V triggers undervoltage lockout (UVLO) at 2.2 V, disabling regulation until VIN rises above 2.65 V.

Does the TPS73525DRBRG4 require an external noise-reduction capacitor to achieve its specified 13.2 μVRMS noise?

Yes - the TPS73525DRBRG4 achieves 13.2 μV_RMS output noise only when a 10-nF ceramic capacitor is connected between the NR pin (Pin 2) and GND. Without this capacitor, output noise rises to approximately 95 × V_OUT (237.5 μV_RMS), per TI's Electrical Characteristics table.

Can the TPS73525DRBRG4 be used with a 1-μF input capacitor instead of the recommended 0.1–1-μF range?

Yes - the TPS73525DRBRG4 is fully compatible with a 1-μF input capacitor. TI specifies a 0.1–1-μF low-ESR ceramic capacitor from IN to GND to improve source impedance and transient response; a 1-μF unit falls within this validated range and supports stable operation across all load conditions.

What is the thermal pad connection requirement for the TPS73525DRBRG4 WSON-6 package?

The exposed thermal pad on the TPS73525DRBRG4 WSON-6 package must be soldered directly to a PCB ground plane using a 2×2 thermal via array. This connection is mandatory for thermal performance: R_θJB drops from 34.7°C/W (unconnected) to 19.3°C/W (properly connected), preventing thermal shutdown under 500-mA load at +85°C ambient.

Is the TPS73525DRBRG4 pin-compatible with other members of the TPS735 family, such as the TPS73533DRBR?

No - the TPS73525DRBRG4 shares the same WSON-6 package and pinout as other fixed-output TPS735 variants (e.g., TPS73533DRBR), but the FB/NR pin function differs between fixed and adjustable versions. Since both TPS73525DRBRG4 and TPS73533DRBR are fixed-output devices, they are pin-compatible and share identical pin assignments and electrical behavior except for output voltage.