KA78R33TSTU

$0.23

Description：LDO REGULATOR POS 3.3V 1A 4PIN(4
Series：*
Mfr：Fairchild Semiconductor
Package：Bulk

SKU:f12175d731c8 Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: Fairchild Semiconductor

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Product introduction

KA78R33TSTU is listed in the Voltage Regulators - Linear, Low Drop Out (LDO) Regulators range at ChipApex. The manufacturer field lists Fairchild Semiconductor. Its product description is LDO REGULATOR POS 3.3V 1A 4PIN(4. Review the specifications below when checking this part for your BOM.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators specifications for KA78R33TSTU

Description：LDO REGULATOR POS 3.3V 1A 4PIN(4
Series：*
Mfr：Fairchild Semiconductor
Package：Bulk
Output Configuration：-
Output Type：-
Number of Regulators：-
Voltage - Input (Max)：-
Voltage - Output (Min/Fixed)：-
Voltage - Output (Max)：-
Voltage Dropout (Max)：-
Current - Output：-
Current - Quiescent (Iq)：-
Current - Supply (Max)：-
PSRR：-
Control Features：-
Protection Features：-
Operating Temperature：-
Mounting Type：-
Package / Case：-
Supplier Device Package：-
Grade：-
Qualification：-

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators datasheet and documents for KA78R33TSTU

KA78R33TSTU

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The KA78R33TSTU is a fixed positive low-dropout voltage regulator manufactured by Fairchild Semiconductor. It provides a stable 3.3V output with a maximum dropout voltage of 0.5V at full rated current. The device supports an output current of up to 1A and operates within an input voltage range from 4V to 35V. It features internal protections including peak current limiting, thermal shutdown, and safe operating area protection. The component is housed in a TO-220 package and is designed for reliable performance across various electronic equipment applications requiring efficient power regulation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

Low dropout voltage operation ensures efficient power management under varying load conditions.
Integrated peak current protection prevents damage during overload scenarios.
Thermal shutdown mechanism safeguards the device against overheating.
Safe operating area protection maintains stability across diverse operating environments.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

General purpose electronic equipment power supplies
Battery-powered systems requiring efficient voltage regulation
Embedded systems with strict power budget constraints

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the manufacturer origin as Fairchild Semiconductor or its successor entities like onsemi, given corporate acquisitions. Confirm the specific suffix 'TSTU' corresponds to the intended TO-220 packaging variant. Check RoHS compliance status as historical data indicates some variants may not be compliant. Ensure the part number matches the exact electrical specifications required for your design, particularly the 3.3V fixed output and 1A current rating.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a low dropout characteristic is critical for maintaining regulation near the minimum input voltage. The 0.5V dropout allows for tighter input-output margins compared to standard regulators. Consider the thermal performance in the TO-220 package if high ambient temperatures are expected. Verify that the 1A output current meets the system's peak demand without exceeding the device's safe operating area limits.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This regulator belongs to the KA78R series of low-dropout voltage regulators. Similar parts in this family include the KA78R15TU for 15V output and the KA78RM33R for surface mount applications. The series is characterized by bipolar technology and robust internal protection circuits. These components are widely used in industrial and consumer electronics where reliable, compact power solutions are needed.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct substitutes include the KA78R33CTU from onsemi, which shares similar electrical characteristics but may differ in packaging details. Other potential replacements should be verified for matching output voltage, current capacity, and dropout specifications. Always consult the latest datasheets to ensure compatibility with existing circuit designs and thermal requirements.

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Return and Refund

Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.