Texas Instruments TPS7A1025PDSET

Overview

TPS7A1025PDSET from Texas Instruments is a 300-mA, ultra-low-dropout linear regulator with dual-supply architecture (VIN + VBIAS), fixed 2.5-V output, 1.5% accuracy over load/line/temperature, 70-mV max dropout at 300 mA (YKA package), and 1.6-µA typical VIN quiescent current. It powers ultra-low-voltage cores in space-constrained wearable and portable medical devices.

For engineers reviewing the TPS7A1025PDSET datasheet, TPS7A1025PDSET pinout, TPS7A1025PDSET application, or TPS7A1025PDSET equivalent, key selection criteria include LILO (low-input/low-output) operation capability, BIAS-rail dependency for sub-bandgap regulation, active output discharge (P-version only), and WSON-6 package thermal performance (RθJA = 188.8°C/W).

Technical Context

The TPS7A1025PDSET implements a dual-rail LDO architecture where VIN supplies the pass element while VBIAS powers internal control circuitry-enabling stable regulation down to 0.5 V output from as low as 0.75 V input. Its global UVLO requires both VIN ≥ 675 mV (rising) and VBIAS ≥ 1.54 V (rising) to enable regulation.

It features built-in monotonic soft-start, active output discharge via 120-Ω pulldown (P-version only), and high PSRR (60 dB @ 1 kHz) achieved through high-gain error amplifier and optimized compensation. Thermal shutdown activates at 160°C with 15°C hysteresis.

Key Specifications

Pinout & Package

TPS7A1025PDSET is packaged in a 1.50-mm × 1.50-mm, 6-pin WSON (DSE) package with wettable flanks, rated for –40°C to +125°C junction temperature and RθJA = 188.8°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-IQ, LILO LDO applications.

Compared with TPS7A1025PDSET, TPS7A0525PDQNR offers lower IQ but forfeits LILO operation, while MCP1804T-2502I/OT provides cost-effective basic regulation but lacks critical features for portable medical and audio applications-including soft-start, active discharge, and sub-1-V input support.

Availability

TPS7A1025PDSET is available at Aetrix Electronics and suitable for smart watches, wireless earbuds, portable ECG sensors, and camera modules requiring stable component supply across extended production lifecycles.

Supply support for TPS7A1025PDSET 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and personal electronics markets.

The TPS7A10 product line delivers ultra-low-IQ, LILO LDOs optimized for battery-powered wearables and portable medical devices requiring sub-1-V input operation and precise low-voltage core regulation.

FAQ

What is the minimum input voltage required for TPS7A1025PDSET to regulate 2.5 V output?

The TPS7A1025PDSET requires VIN ≥ 2.57 V (2.5 V + 70 mV dropout) for full 300-mA operation in DSE package. However, it can maintain regulation at lower VIN (down to 0.75 V) when VBIAS ≥ 1.7 V is supplied-enabling true LILO operation where VIN may be < VOUT. This dual-rail behavior is fundamental to the TPS7A1025PDSET architecture and distinguishes it from conventional single-rail LDOs.

Does TPS7A1025PDSET support active output discharge, and how is it implemented?

Yes, TPS7A1025PDSET (P-version) includes active output discharge via an internal 120-Ω pulldown resistor connected to GND when EN is driven low or thermal shutdown occurs. Discharge time depends on COUT and parallel load resistance (τ ≈ 120·RL·COUT). This feature ensures rapid, controlled VOUT decay-critical for safe power sequencing in multi-rail systems-and is confirmed in the functional block diagram and electrical characteristics table of the official SBVS314B datasheet.

What are the recommended capacitor values for TPS7A1025PDSET input, output, and bias pins?

Per TI SBVS314B datasheet Section 6.3: CIN ≥ 2.2 µF ceramic, COUT ≥ 2.2 µF (up to 22 µF for improved transient response), and CBIAS ≥ 0.1 µF ceramic. All capacitors must be placed as close as possible to their respective pins. COUT value directly impacts PSRR and noise performance-22-µF COUT yields higher low-frequency PSRR than 2.2 µF, as shown in Figure 27. These values are validated for stability across –40°C to +125°C and are mandatory for guaranteed operation of the TPS7A1025PDSET.

How does the global UVLO function in TPS7A1025PDSET, and what are its thresholds?

The TPS7A1025PDSET implements global UVLO using independent circuits on VIN and VBIAS pins, logically ANDed internally. Regulation enables only when both VIN ≥ 675 mV (rising) and VBIAS ≥ 1.54 V (rising); disable occurs if either falls below 600 mV (VIN) or 1.44 V (VBIAS). Hysteresis is 75 mV (VIN) and 80 mV (VBIAS). This prevents erratic startup during brownout and ensures coordinated rail sequencing-key for reliable operation of the TPS7A1025PDSET in battery-fed systems.

Is TPS7A1025PDSET pin-compatible with other TPS7A10 variants, and what package does it use?

TPS7A1025PDSET uses the 6-pin WSON (DSE) package (1.50 mm × 1.50 mm), which is pin-compatible with all other TPS7A10x PDSET variants (e.g., TPS7A1018PDSET, TPS7A1033PDSET). Pin mapping is identical: OUT, GND, EN, BIAS, NC, IN. The NC pin is not bonded and must remain unconnected. This uniformity allows voltage-option flexibility without PCB redesign-confirmed in TI's Device Information table and Pin Configuration section of SBVS314B.