Texas Instruments TPS7A2018PDBVR

The TPS7A2018PDBVR provides a fixed 1.8 V rail from a 1.6 V to 6.0 V input and can source up to 300 mA when input headroom and thermal conditions are satisfied. The device combines low output noise, high PSRR, internal soft start, foldback current limiting, UVLO, thermal shutdown, and a smart active-high enable input for sensitive analog, RF, and battery-powered loads.

The DBV suffix identifies TI's 5-pin SOT-23 package, nominally 2.9 mm by 2.8 mm including leads. The catalog field lists the SC-74A and SOT-753 aliases; the existing SOT-753 registry image is used for this manufacturer-confirmed package family.

Layout checks

• Use TI's current DBV land pattern and verify pin-1 orientation.
• Place IN and OUT capacitors close to their pins with short ground returns.
• Keep the enable trace at a defined logic level and away from noisy switching nodes.
• Calculate junction temperature from actual dissipation and board conditions.

The registered JPG exists locally, returned HTTP 200 as JPEG in production, and was visually checked as a five-lead SOT-23 illustration.

The following assignment applies to the DBV 5-pin SOT-23 top view.

Values apply only under their stated data-sheet test conditions. Validate headroom, transient response, and temperature in the final design.

A candidate replacement must match the fixed 1.8 V output, 300 mA requirement, SOT-23-5 footprint and pin order, input range, enable thresholds, smart pull-down behavior, active output discharge, capacitor stability, dropout, PSRR, noise, and thermal limits. Similar TPS7A20 voltage or package options are not unconditional substitutes.

No internal replacement link is asserted without an exact catalog match and circuit-level review.

Texas Instruments lists TPS7A2018PDBVR as an active 300 mA ultra-low-noise, low-IQ, high-PSRR LDO. In the order code, 18 identifies the fixed 1.8 V output, P denotes active discharge, DBV identifies the 5-pin SOT-23 package, and R denotes the 3,000-piece large tape-and-reel option.

Confirm the full TPS7A2018PDBVR order code, reel label, top marking, pin-1 indicator, five-pin DBV dimensions, and lot traceability during incoming inspection. Package appearance alone does not establish identity or authenticity. Electrical checks should follow the latest TI limits and conditions.

Validate input headroom, line and load transients, capacitor bias derating, enable thresholds, output-discharge timing, and junction temperature on the final PCB. Do not rely on active discharge to remove a large output charge after VIN collapses; TI limits reverse current and requires system-level evaluation.