MIC5319-3.3BD5 Equivalent & Substitute Parts

Part Overview

The MIC5319-3.3BD5 is a linear voltage regulator IC from Microchip Technology designed to deliver a fixed 3.3V output at 500mA in a TSOT-23-5 surface mount package. This device functions as a positive fixed output regulator with integrated enable control and thermal/overcurrent protection features. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity.

Substiute Parts

MIC5319-3.3BD5

Microchip TechnologyIn Stock: 23778MIC5319-3.3BD5 Datasheet

Current PartRFQ

RT9193-33GB

Richtek USA Inc.In Stock: 95233RT9193-33GB Datasheet

MFR RecommendedRFQ

RT9193-33GJ5

Richtek USA Inc.In Stock: 972RT9193-33GJ5 Datasheet

MFR RecommendedRFQ

SP6205EM5-L-3-3/TR

MaxLinear, Inc.In Stock: 49017SP6205EM5-L-3-3/TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC5319-3.3BD5 is determined by the following critical parameters:

• Output Voltage: Must be fixed at 3.3V
• Output Configuration: Must be positive fixed output
• Package Type: Must be TSOT-23-5 or functionally equivalent SOT-23-5 variant
• Input Voltage Range: Must support maximum 5.5V input
• Operating Temperature: Must cover -40°C to 125°C range
• Control Features: Must include Enable function
• Protection: Must include Over Current and Over Temperature protection

The substitute parts identified below meet these core electrical and mechanical requirements while offering active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

RT9193-33GJ5 (Richtek USA Inc.) is the primary substitute for direct replacement. This part maintains the TSOT-23-5 package format identical to the original MIC5319-3.3BD5, ensuring mechanical and thermal compatibility. The RT9193-33GJ5 is active product status with ROHS3 compliance certification. The output current specification of 300mA is lower than the original 500mA; this part is suitable only for applications requiring ≤300mA output current.

SP6205EM5-L-3-3/TR (MaxLinear, Inc.) provides full current capacity matching at 500mA output current and is RoHS compliant. The package is SOT-23-5 (SC-74A variant), which differs from the TSOT-23-5 form factor. This part accommodates applications where the standard SOT-23-5 footprint is acceptable and full 500mA capacity is required.

RT9193-33GB (Richtek USA Inc.) offers SOT-23-5 packaging with 300mA output current and ROHS3 compliance. Selection of this part requires confirmation that application current requirements do not exceed 300mA.

All three substitute parts maintain the 3.3V fixed output voltage, -40°C to 125°C operating range, enable control function, and integrated protection features required for functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can RT9193-33GJ5 replace MIC5319-3.3BD5 in all applications?

A: The RT9193-33GJ5 is mechanically and electrically compatible for applications drawing ≤300mA. Applications requiring the full 500mA output current of the original part require SP6205EM5-L-3-3/TR or equivalent 500mA-rated alternatives.

Q: What is the difference between RT9193-33GB and RT9193-33GJ5?

A: Both parts are from Richtek USA Inc. with identical electrical specifications (3.3V output, 300mA current, -40°C to 125°C operating range). RT9193-33GB uses standard SOT-23-5 packaging (SC-74A), while RT9193-33GJ5 uses TSOT-23-5 packaging. Selection depends on PCB footprint requirements.

Q: Is SP6205EM5-L-3-3/TR a direct mechanical replacement?

A: SP6205EM5-L-3-3/TR uses SOT-23-5 (SC-74A) packaging rather than TSOT-23-5. While both are 5-pin surface mount packages with identical pin assignments, the TSOT variant is thinner. Verify PCB layout clearances and thermal requirements before substitution.

Q: Why is the MIC5319-3.3BD5 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active alternatives with equivalent or superior specifications are available from other manufacturers.

Q: Do all substitute parts meet RoHS requirements?

A: RT9193-33GB and RT9193-33GJ5 are ROHS3 compliant. SP6205EM5-L-3-3/TR is RoHS compliant. The original MIC5319-3.3BD5 is RoHS non-compliant.

Q: What are the key differences in dropout voltage between these parts?

A: MIC5319-3.3BD5 specifies 0.4V dropout at 500mA. RT9193 variants specify 0.3V dropout at 300mA. SP6205EM5-L-3-3/TR specifies 0.5V dropout at 500mA. Dropout voltage affects minimum input voltage requirements for stable regulation.