Texas Instruments TPS7A1018PDSET

Overview

TPS7A1018PDSET from Texas Instruments is a 300-mA, ultra-low-dropout linear regulator (LDO) with dual-supply architecture (VIN + VBIAS), fixed 1.8-V output, 0.75-V minimum input voltage, and 70-mV maximum dropout at 300 mA (YKA package). It delivers 1.5% output accuracy over load, line, and temperature (–40°C to +125°C) and targets core power for ultra-low-voltage MCUs and analog sensors in space-constrained wearable devices.

For engineers reviewing the TPS7A1018PDSET datasheet, TPS7A1018PDSET pinout, TPS7A1018PDSET application, or TPS7A1018PDSET equivalent, key selection criteria include its LILO (low-input/low-output) capability, bias-rail efficiency optimization, active output discharge (P-version), and WSON-6 package compatibility with high-density PCB layouts.

Technical Context

The TPS7A101018PDSET uses a dual-rail architecture where VIN supplies the pass element and VBIAS powers internal control circuitry-enabling stable regulation even when VIN is as low as 70 mV above VOUT. Its global UVLO requires both VIN ≥ 675 mV (rising) and VBIAS ≥ 1.54 V (rising) before enabling regulation.

It integrates a monotonic soft-start, active output discharge (120-Ω pulldown), thermal shutdown (160°C trip), and supports ceramic output capacitors from 2.2 µF to 22 µF. PSRR reaches 60 dB at 1 kHz (VIN and VBIAS), and output noise is 87.6 µVRMS (10 Hz–100 kHz, VOUT = 1.0 V).

Key Specifications

Pinout & Package

TPS7A1018PDSET is packaged in a 6-pin WSON (DSE) package, 1.50 mm × 1.50 mm, with exposed thermal pad. Pin 1 is OUT; pin 6 is IN. The package supports automated optical inspection (AOI) and offers low thermal resistance (RθJA = 188.8°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL7407LPDQ (non-regulator) and TPS7A0518PDQNR (single-rail), TPS7A1018PDSET uniquely enables LILO operation via dedicated VBIAS, achieving 70-mV dropout and sub-µA VIN IQ-making it irreplaceable for energy-critical, ultra-low-input designs.

Availability

TPS7A1018PDSET is available at Aetrix Electronics and suitable for smart wearables, wireless audio, medical sensors, and portable imaging systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS7A1018PDSET 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 system solutions for industrial, automotive, and personal electronics markets.

The TPS7A10 family was engineered specifically for ultra-low-power, ultra-small-form-factor battery-powered devices-emphasizing LILO operation, dual-rail efficiency, and nanoscale packaging without sacrificing accuracy or transient performance.

FAQ

What is the minimum input voltage required for TPS7A1018PDSET to regulate 1.8 V output?

The TPS7A1018PDSET requires VIN ≥ 0.75 V minimum, but stable regulation at 1.8 V demands VIN ≥ VOUT + VDO. With max dropout of 70 mV (DSE package), minimum functional VIN is 1.87 V. Below that, VBIAS (≥1.7 V) sustains internal circuitry while VIN supplies the pass element-enabling true LILO operation. Always verify both VIN and VBIAS UVLO thresholds (675 mV and 1.54 V) during power-up sequencing.

Does TPS7A1018PDSET support active output discharge, and how does it work?

Yes, TPS7A1018PDSET (P-suffix) includes active output discharge. When EN is driven low or thermal shutdown activates, an internal 120-Ω pulldown MOSFET connects OUT to GND. Discharge time depends on COUT and parallel load resistance per τ = 120·RL/(120+RL)·COUT. This ensures rapid, predictable VOUT decay-critical for resetting downstream logic or preventing back-powering in multi-rail systems.

What are the recommended input and output capacitor values for TPS7A1018PDSET?

TI specifies CIN ≥ 2.2 µF and COUT ≥ 2.2 µF (up to 22 µF), all ceramic X5R/X7R with ≤250-mΩ ESR. CBIAS ≥ 0.1 µF is mandatory. These values ensure stability, minimize input impedance, and optimize transient response. Place CIN and COUT as close as possible to their respective pins; CBIAS must also be near BIAS. Larger COUT improves load-transient suppression but increases startup time.

Can TPS7A1018PDSET operate with only the VIN supply, without connecting VBIAS?

No-TPS7A1018PDSET requires both VIN and VBIAS to function. VBIAS (1.7–5.5 V) powers the internal control circuitry, including error amplifier and reference. If VBIAS is unconnected or below 1.46 V (UVLO rising threshold), the device remains disabled regardless of VIN or EN state. For single-rail operation, consider TPS7A0518PDQNR-but it lacks LILO capability and has higher dropout.

What is the thermal performance of TPS7A1018PDSET in the WSON-6 (DSE) package?

In the WSON-6 (DSE) package, TPS7A1018PDSET has RθJA = 188.8°C/W (JEDEC High-K board), RθJB = 101.0°C/W, and ψJB = 100.4°C/W. At 300 mA and 1.8-V output with 1.87-V input (70-mV dropout), power dissipation is ~21 mW. With 25°C ambient, junction temperature rise is ~4°C-well within the –40°C to +125°C operating range. Use the exposed thermal pad and 2+ thermal vias for optimal heat transfer.