Manufacturer Part Number

TPS75933KTT

Description

High-performance linear voltage regulator from Texas Instruments. Delivers a fixed 3.3V output voltage with up to 7.5A output current. Integrated with advanced protection features. Compact surface-mount power management chip designed for demanding electronic systems requiring low dropout performance and robust current capabilities. The device uses a D2PAK/TO-263-6 package suitable for high power dissipation and ease of PCB integration. The regulator is now obsolete but widely used in legacy designs requiring high current 3.3V supply.

Specifications

Input Voltage (Max): 5.5V

Output Voltage (Fixed): 3.3V

Output Current: 7.5A max

Dropout Voltage (Max): 0.75V @ 7.5A

Number of Regulators: 1

Output Configuration: Positive

Output Type: Fixed

Quiescent Current: 200 µA

PSRR: 58dB at 100Hz

Control Features: Enable, Power Good

Protection: Overcurrent, Overtemperature, Reverse Polarity, UVLO

Operating Temperature Range: -40°C to +125°C

Package: TO-263-6 (D2PAK / DDPAK-5 / TO-263BA)

RoHS Status: Non-compliant

Moisture Sensitivity Level: 2 (1 Year)

Status: Obsolete

Device Structure

Single-channel, positive output, fixed-voltage linear regulator. Integrated control and fault monitoring, with all power and thermal handling within a compact DDPAK/TO-263 package for surface mounting.

Performance Characteristics

Supports high output current up to 7.5A for demanding loads

Low dropout voltage ensures regulation close to input supply, minimizing power loss

Good power supply rejection ratio reduces noise impact

Extremely low quiescent current for high efficiency in standby conditions

Reliable performance over extended industrial temperature range

Comprehensive safety, including overcurrent, overtemperature, reverse polarity, under voltage lockout

Application Environments

Suitable for digital systems, microprocessor/DSP/FPGA supply rails

Used in industrial electronics, networking equipment, communications, and high-current embedded systems

Ideal for legacy equipment maintenance and repairs requiring high-current 3.3V rails

Selection Guidelines

Choose if you need a fixed 3.3V supply with high current (up to 7.5A)

Suitable for systems with input voltage less than 5.5V and where dropout must remain under 0.75V at max load

Not recommended for new designs due to obsolete status and lack of RoHS compliance

Ensure thermal management is adequate due to high current operation

Verify compatibility with leaded/non-lead-free processes as device is RoHS non-compliant

Usage Considerations

Ensure proper PCB layout for heat dissipation, as device can dissipate significant power at high current

Observe moisture sensitivity (MSL 2 – 1 year), follow proper storage and handling

Obsolete status means supply may not be guaranteed for future production; plan accordingly

Take care with input voltage, ensuring it always stays above output plus dropout

Protection features enhance safety but do not substitute for downstream fault handling

Potential Equivalent/Replacement Models

This device is obsolete and not RoHS compliant; alternatives are recommended for new designs

Texas Instruments recommends TPS7A33 or TPS7A47 series for newer, high-current, low dropout regulators, but verify specs and footprint

Possible other alternatives: LD1117 (lower current); LT3080, LM338 (check if they meet exact needs for current, voltage, and pinout)

For high power, consider switching regulators (e.g., LMZ31710, PTH08080) if efficiency and thermal performance are priorities

For direct pin/pad compatibility and full specification match, contact Ariat-Tech sales team for more detailed cross-references and sourcing options

If no fully equivalent models are confirmed for drop-in replacement, please contact the Ariat-Tech sales team for additional guidance and assistance with alternatives suitable for your application.

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