RT9183-33GG Equivalent & Substitute Parts

Part Overview

The RT9183-33GG is a linear voltage regulator IC from Richtek USA Inc. designed for positive fixed 3.3V output at 1.5A in SOT-223 packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The RT9183-33GG operates across -40°C to 125°C with integrated over-current and over-temperature protection, suitable for applications requiring stable 3.3V regulation from input voltages up to 5.5V.

Substiute Parts

RT9183-33GG

Richtek USA Inc.In Stock: 15313RT9183-33GG Datasheet

Current PartRFQ

RT9048AGQW

Richtek USA Inc.In Stock: 3368RT9048AGQW Datasheet

MFR RecommendedRFQ

RT9183-33GGF

Richtek USA Inc.In Stock: 12802RT9183-33GGF Datasheet

Parametric EquivalentRFQ

TL1963A-33DCYR

Texas InstrumentsIn Stock: 25358TL1963A-33DCYR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the RT9183-33GG is determined by the following critical parameters: fixed 3.3V output voltage, 1.5A output current capability, positive output configuration, surface mount packaging, and operating temperature range of -40°C to 125°C. Protection features (over-current and over-temperature) are required for functional equivalence.

Substitute parts are grouped into two categories:

Parametric Equivalent: RT9183-33GGF matches all electrical specifications and output characteristics of the main part, differing only in packaging variant (SOT-223F vs. SOT-223). This part maintains identical voltage regulation, current capacity, and protection features.

MFR Recommended Substitute: RT9048AGQW is a Richtek alternative with adjustable output voltage (0.65V to 5.7V range), lower dropout voltage (0.3V @ 1.5A), and enhanced protection features including reverse polarity and UVLO. Package differs to 8-WDFN (3x3). This part requires external resistor network configuration to achieve 3.3V fixed output.

Similar Substitute: TL1963A-33DCYR from Texas Instruments provides fixed 3.3V output at 1.5A with higher maximum input voltage (20V vs. 5.5V), slightly higher dropout voltage (0.55V @ 1.5A), and additional enable control feature. Package is SOT-223-4, compatible with SOT-223 footprints.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: RT9183-33GGF is the primary choice. It maintains identical electrical specifications and protection features as the obsolete RT9183-33GG. The only difference is the packaging variant (SOT-223F), which is footprint-compatible with standard SOT-223 designs. This part is active and ROHS3 compliant, ensuring long-term availability.

For Enhanced Performance: TL1963A-33DCYR from Texas Instruments offers higher maximum input voltage tolerance (20V vs. 5.5V), making it suitable for applications with wider input voltage ranges. The enable control feature provides additional circuit flexibility. Dropout voltage is marginally higher (0.55V vs. 0.5V), and quiescent current is elevated (1 mA vs. 500 µA). Package compatibility with SOT-223 footprints simplifies board redesign.

For Adjustable Output Applications: RT9048AGQW provides the lowest dropout voltage (0.3V @ 1.5A) and most comprehensive protection suite including reverse polarity and UVLO. However, this part requires external resistor network configuration to set 3.3V output and uses 8-WDFN packaging, necessitating PCB layout modifications. Input voltage maximum is limited to 1.6V, restricting its use to low-voltage input applications.

All substitute parts are ROHS3 compliant and operate across the required -40°C to 125°C temperature range, meeting regulatory and environmental requirements equivalent to the main part.

Frequently Asked Questions (FAQ)

Q: Can RT9183-33GGF be used as a direct drop-in replacement for RT9183-33GG?

A: Yes. RT9183-33GGF is a parametric equivalent with identical electrical specifications: 3.3V fixed output, 1.5A current capacity, 0.5V dropout voltage, and 500 µA quiescent current. The SOT-223F package is footprint-compatible with standard SOT-223 layouts. Both parts are ROHS3 compliant and operate across -40°C to 125°C.

Q: What are the key differences between RT9048AGQW and RT9183-33GG?

A: RT9048AGQW has adjustable output voltage (0.65V to 5.7V) requiring external resistor configuration for 3.3V output, lower dropout voltage (0.3V vs. 0.5V), enhanced protection features (reverse polarity, short circuit, UVLO), and 8-WDFN packaging instead of SOT-223. Maximum input voltage is limited to 1.6V, making it unsuitable for applications requiring higher input voltages.

Q: Is TL1963A-33DCYR compatible with RT9183-33GG applications?

A: TL1963A-33DCYR provides fixed 3.3V output at 1.5A with SOT-223-4 packaging compatible with SOT-223 footprints. Key differences include higher maximum input voltage (20V vs. 5.5V), slightly higher dropout voltage (0.55V vs. 0.5V), elevated quiescent current (1 mA vs. 500 µA), and enable control feature. It is suitable for applications with wider input voltage ranges and is ROHS3 compliant.

Q: What packaging considerations apply when selecting a substitute?

A: RT9183-33GGF uses SOT-223F packaging, compatible with existing SOT-223 PCB layouts. TL1963A-33DCYR uses SOT-223-4 packaging, also compatible with SOT-223 footprints. RT9048AGQW uses 8-WDFN (3x3) packaging, requiring PCB layout modifications and new footprint design. Package selection depends on available board space and thermal management requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. RT9183-33GGF, RT9048AGQW, and TL1963A-33DCYR are all ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the obsolete RT9183-33GG.

Q: Which substitute offers the best dropout voltage performance?

A: RT9048AGQW provides the lowest dropout voltage at 0.3V @ 1.5A, compared to 0.5V for RT9183-33GG and 0.55V for TL1963A-33DCYR. However, RT9048AGQW requires external resistor configuration for fixed 3.3V output and is limited to 1.6V maximum input voltage.