Texas Instruments TLV75533PDBVR

The TLV75533PDBVR provides a fixed 3.3 V rail with low ground current, built-in soft start, enable control, foldback current limiting, thermal shutdown, and active output discharge. Its DBV package suits compact point-of-load regulation where a defined shutdown state and good transient response are required.

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

Layout checks

• Use TI's current DBV land pattern and verify pin-1 orientation.
• Place 1 microfarad or larger input and output capacitors close to the pins.
• Keep the enable trace at a defined logic level and away from noisy switching nodes.
• Calculate junction temperature from voltage drop, load current, board copper, and ambient conditions.

The registered JPG is checked locally and in production before publication.

The DBV SOT-23-5 assignment below follows TI's top-view diagram.

Maintain more than 0.47 microfarad effective capacitance at IN and OUT after voltage, temperature, and tolerance derating.

Unless otherwise stated, TI characterizes the device with 1 microfarad input and output capacitors and the input set to the greater of 2.0 V or nominal output plus 0.5 V.

A replacement must preserve the fixed 3.3 V output, 500 mA capability, DBV SOT-23-5 footprint and pin order, input range, dropout, enable thresholds, active output discharge, capacitor stability, and thermal performance. Devices with the same package but different pin assignments or without discharge are not unconditional substitutes.

No internal replacement link is asserted without an exact API-confirmed catalog match and engineering review.

Texas Instruments lists TLV75533PDBVR as active and in production. In the order code, 33 identifies the 3.3 V nominal output, P identifies active output discharge, DBV identifies the five-pin SOT-23 package, and R identifies the 3000-piece reel option. TI documents the package marking as 1FWF.

Confirm the exact TLV75533PDBVR order code, 1FWF marking, DBV package dimensions, reel label, pin-1 orientation, lead finish, and lot traceability during incoming inspection. Package appearance alone does not establish authenticity. Electrical sampling should use the latest TI limits.

Validate dropout headroom, capacitor bias derating, startup and load transients, enable sequencing, thermal rise, and the exact DBV land pattern in the final circuit. At high load current, power dissipation and PCB thermal performance can limit operation even when the input remains within 5.5 V.