Texas Instruments TPS7A1015PDSER

Overview

TPS7A1015PDSER from Texas Instruments is a 300-mA, ultra-low-dropout linear regulator (LDO) with dual-supply architecture (VIN + VBIAS), supporting input as low as 0.75 V and output down to 0.5 V. It delivers 1.5% output accuracy over load, line, and temperature (–40°C to +125°C), features 70 mV max dropout at 300 mA (YKA package), and draws only 1.6 µA IQ from VIN - optimized for battery-powered wearable and portable medical devices.

For engineers reviewing the TPS7A1015PDSER datasheet, TPS7A1015PDSER pinout, TPS7A1015PDSER application, or TPS7A1015PDSER equivalent, this page provides verified technical context on its dual-rail operation, LILO (low-input/low-output) capability, active discharge (P-version), thermal shutdown behavior, and WSON-6 package compatibility - all critical for space-constrained, ultra-low-power system design.

Technical Context

The TPS7A1015PDSER implements a dual-supply LDO architecture: VIN supplies the pass element while VBIAS powers internal control circuitry, enabling stable regulation even when VIN is <1.0 V above VOUT. Its global UVLO requires both VIN ≥675 mV (rising) and VBIAS ≥1.54 V (rising) before enabling regulation.

It integrates an active pull-down circuit (120 Ω pulldown resistor) activated during disable or thermal shutdown, ensuring monotonic VOUT discharge. PSRR reaches 60 dB at 1 kHz (VIN and VBIAS paths), and output noise is 87.6 µVRMS (10 Hz–100 kHz, VOUT = 1.0 V, IOUT = 50 mA).

Key Specifications

Pinout & Package

TPS7A1015PDSER is packaged in a 1.50-mm × 1.50-mm WSON-6 (DSE) package with wettable flanks, suitable for automated optical inspection (AOI) and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-dropout LDO applications.

Compared with TPS7A1015PDSER, the 1.2-V variant offers identical performance at a different voltage point, while the TPS7A0515PDQNR trades LILO flexibility and active discharge for smaller size and lower cost in less demanding applications.

Availability

TPS7A1015PDSER is available at Aetrix Electronics and suitable for smart wearables, portable medical sensors, and wireless earbuds requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TPS7A1015PDSER 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 power management technologies, with decades of LDO innovation for portable and industrial systems.

The TPS7A10 family was designed specifically for ultra-low-voltage, ultra-low-power applications - targeting battery-operated devices needing LILO regulation, nanoscale packaging, and precise output accuracy without external components.

FAQ

What is the function of the BIAS pin on the TPS7A1015PDSER?

The BIAS pin on the TPS7A1015PDSER powers the internal control circuitry independently of the main input (VIN), enabling stable regulation even when VIN is as low as VOUT + 70 mV. It accepts 1.7–5.5 V and draws only 6 µA typical quiescent current. This dual-rail architecture allows the TPS7A1015PDSER to operate efficiently in LILO (low-input/low-output) configurations common in modern battery-powered systems.

Does the TPS7A1015PDSER require external capacitors, and what values are recommended?

Yes, the TPS7A1015PDSER requires three external capacitors: CIN ≥2.2 µF (ceramic, X5R/X7R), CBIAS ≥0.1 µF (ceramic), and COUT ≥2.2 µF (ceramic, up to 22 µF for improved transient response). All must be placed close to their respective pins. The TPS7A1015PDSER is stable with these values and does not require ESR tuning, simplifying layout for high-density wearable PCBs.

Is the TPS7A1015PDSER pin-compatible with other variants in the TPS7A10 family?

Yes - all WSON-6 (DSE) variants of the TPS7A10 family, including TPS7A1012PDSER and TPS7A1018PDSER, share identical pinout and package dimensions. The only functional difference is the fixed output voltage (1.2 V, 1.5 V, or 1.8 V); no PCB redesign is needed when swapping within the DSE package group.

What is the purpose of the NC pin (Pin 6) on the TPS7A1015PDSER WSON-6 package?

Pin 6 on the TPS7A1015PDSER is designated NC (No Connect) - it has no internal connection and serves no electrical function. TI's datasheet confirms this pin is unconnected; it may be left floating or tied to GND for mechanical stability or thermal relief, but must not be used as a signal or power path.

How does the active discharge feature work on the TPS7A1015PDSER?

The TPS7A1015PDSER (P-version) integrates an active discharge circuit that engages a 120-Ω pulldown resistor between OUT and GND when the device is disabled (EN low) or enters thermal shutdown. This ensures rapid, controlled discharge of output capacitance - critical for clean power sequencing in multi-rail systems. Discharge time depends on COUT and parallel load resistance per τ = 120·RL/(120+RL)·COUT.