Texas Instruments TPS76725QD

Overview

TPS76725QD from Texas Instruments is a fixed-output 2.5-V, 1-A low-dropout linear regulator with fast transient response, 230 mV dropout at 1 A (typ), ±2% output voltage tolerance over line/load/temperature, and integrated open-drain power-on reset with 200-ms delay. It operates from 3.5 V to 10 V input and delivers stable power to microcontroller cores in battery-powered instrumentation.

For engineers reviewing the TPS76725QD datasheet, TPS76725QD pinout, TPS76725QD application, or TPS76725QD equivalent, key selection criteria include dropout voltage at full load, quiescent current under sleep mode, RESET threshold hysteresis, thermal shutdown behavior, and compatibility with 10-µF low-ESR ceramic output capacitors.

Technical Context

The TPS76725QD uses a PMOS pass element enabling ultralow 85 µA typical quiescent current independent of output load and dropout voltage directly proportional to output current. Its internal 1.1834-V reference feeds a high-impedance feedback amplifier monitoring regulated output for RESET assertion.

RESET activates when VO drops to 92–98% of nominal (2.3–2.45 V), with 0.5-V hysteresis, and remains asserted for 200 ms after recovery. The device supports zero-load operation and requires no minimum output capacitance beyond the 10-µF/50-mΩ–1.5-Ω ESR stability window.

Key Specifications

Pinout & Package

TPS76725QD is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm with standard JEDEC outline, optimized for thermal performance via exposed pad grounding in PWP variants (not applicable here).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS76725QD, TPS76725QDR offers identical performance in tape-and-reel format for manufacturing scalability, while TPS7A4701RGWR trades integrated RESET and lower dropout for superior noise performance - making it suitable only for noise-critical analog rails where external reset supervision is acceptable.

Availability

TPS76725QD is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and test & measurement equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TPS76725QD 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and consumer applications.

The TPS767xx family was designed for battery-powered and space-constrained systems requiring fast transient response, low quiescent current, and integrated power-good monitoring - targeting microcontroller-based instrumentation and control applications.

FAQ

What is the maximum input voltage rating for the TPS76725QD?

The TPS76725QD has an absolute maximum input voltage rating of 13.5 V. However, its recommended operating input voltage range is 3.5 V to 10 V. Exceeding 10 V may degrade long-term reliability or trigger internal protection circuits, even if within absolute max limits. Always maintain VIN ≤ VOUT + VDO (≤2.85 V) for proper regulation - the TPS76725QD cannot regulate below this margin.

Does the TPS76725QD require an external resistor divider for output voltage setting?

No, the TPS76725QD is a fixed-output 2.5-V regulator and does not require an external resistor divider. Pin 7 (FB/NC) is internally disconnected for fixed versions; it should be left floating or tied to GND per TI layout guidelines. Only the adjustable TPS76701 variant uses FB for feedback network configuration - the TPS76725QD delivers 2.5 V directly from OUT pins without external components.

How does the RESET function behave during startup and brownout conditions for the TPS76725QD?

The TPS76725QD RESET output asserts low when the regulated output falls below 92% of nominal (2.3 V) and remains low for a guaranteed 200 ms after VO recovers above 98% (2.45 V). During startup, RESET stays low until VO stabilizes within tolerance, then releases after the 200-ms timeout. This ensures clean microcontroller initialization and prevents spurious resets during transient dips - a behavior confirmed in the TPS76725QD timing diagram (Figure 1).

Can the TPS76725QD operate without an output capacitor?

No, the TPS76725QD requires a minimum 10-µF output capacitor with ESR between 50 mΩ and 1.5 Ω for loop stability. Omitting Co causes oscillation and regulation failure. Ceramic, tantalum, or aluminum electrolytic types are acceptable if ESR falls within spec - most commercial 10-µF X7R ceramics meet this requirement. The TPS76725QD is not stable at zero capacitance, unlike some newer LDOs with internal compensation.

What thermal considerations apply to the TPS76725QD in SOIC (D) package?

The TPS76725QD in SOIC-D package has a junction-to-ambient thermal resistance (R_θJA) of 106.9°C/W. At 1 A load with 3.5 V input (1 V dropout), power dissipation is ~1 W - raising junction temperature by ~107°C above ambient. To stay within the 125°C max TJ limit, ambient must remain below 18°C unless heatsinking or airflow is added. For higher ambient or continuous 1-A operation, consider the thermally enhanced HTSSOP (PWP) variant or derate output current per TI's thermal equations.