RT9183-12GG Equivalent & Substitute Parts

Part Overview

The RT9183-12GG is a linear voltage regulator IC from Richtek USA Inc. designed for positive fixed 1.2V output at 1.5A in SOT-223 surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The regulator provides over current and over temperature protection across an operating range of -40°C to 125°C with a maximum input voltage of 5.5V and dropout voltage of 0.5V at full load.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	1.2V
Output Current	1.5A
Input Voltage (Max)	5.5V
Dropout Voltage (Max)	0.5V @ 1.5A
Quiescent Current	500 µA
Operating Temperature	-40°C to 125°C
Package Type	SOT-223
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the RT9183-12GG is determined by the following critical parameters: fixed output voltage of 1.2V, output current capability, maximum input voltage of 5.5V, package compatibility (SOT-223 family), operating temperature range, and protection features. Parts are grouped into two categories based on output current capacity and product status.

Parametric Equivalent (Direct Replacement):

RT9183-12GGF: Identical electrical specifications with active product status and SOT-223F packaging variant

Similar Alternatives (Functional Equivalents with Parameter Variations):

AP7363-12E-13: Matches core voltage and current specifications; lower dropout voltage and improved PSRR; reduced operating temperature range (-40°C to 85°C)
TLV117112DCYR and TLV117112DCYT: Reduced output current (1A vs 1.5A); enhanced protection features including reverse polarity and UVLO; lower quiescent current (100 µA); last time buy status

Parameter Comparison

Parameter	RT9183-12GG	RT9183-12GGF	AP7363-12E-13	TLV117112DCYR	TLV117112DCYT
Output Voltage	1.2V	1.2V	1.2V	1.2V	1.2V
Output Current	1.5A	1.5A	1.5A	1A	1A
Input Voltage (Max)	5.5V	5.5V	5.5V	5.5V	5.5V
Dropout Voltage (Max)	0.5V @ 1.5A	0.5V @ 1.5A	0.24V @ 1.5A	0.8V @ 1A	0.8V @ 1A
Quiescent Current	500 µA	500 µA	1.2 mA	100 µA	100 µA
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 85°C	-40°C to 125°C	-40°C to 125°C
Package	SOT-223	SOT-223F	SOT-223-3	SOT-223-4	SOT-223-4
Product Status	Obsolete	Active	Active	Last Time Buy	Last Time Buy
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Preferred): RT9183-12GGF is the recommended substitute. It maintains identical electrical specifications and operating parameters while offering active product status and assured long-term availability. The SOT-223F packaging variant is mechanically compatible with SOT-223 footprints.

For Applications with Reduced Current Requirements: AP7363-12E-13 from Diodes Incorporated is suitable for designs requiring 1.5A output current with improved efficiency due to lower dropout voltage (0.24V vs 0.5V). This part is active and ROHS3 compliant. Note the reduced operating temperature maximum of 85°C; verify compatibility with application thermal requirements.

For Legacy System Maintenance: TLV117112DCYR and TLV117112DCYT from Texas Instruments provide functional equivalence with reduced output current (1A maximum). These parts are in last time buy status and include enhanced protection features (reverse polarity, UVLO). Selection between cut tape (DCYR) and tape & reel (DCYT) packaging depends on procurement and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can RT9183-12GGF directly replace RT9183-12GG in existing designs? A: Yes. RT9183-12GGF is a parametric equivalent with identical electrical specifications, output voltage, current rating, and operating temperature range. The SOT-223F package variant is mechanically compatible with SOT-223 footprints.

Q: What is the key difference between AP7363-12E-13 and the RT9183-12GG? A: AP7363-12E-13 provides superior dropout voltage performance (0.24V vs 0.5V at 1.5A), resulting in lower power dissipation and improved efficiency. The operating temperature range is reduced to -40°C to 85°C. Both maintain 1.2V fixed output and 1.5A current capability.

Q: Are TLV117112DCYR and TLV117112DCYT interchangeable? A: Electrically, yes. Both are identical TLV117112 devices with 1.2V output and 1A maximum current. The difference is packaging: DCYR is cut tape format, while DCYT is tape & reel format. Selection depends on assembly line requirements and procurement preferences.

Q: Can I use TLV117112 devices as a substitute if my application requires 1.5A output? A: No. TLV117112 devices are rated for maximum 1A output current. Applications requiring 1.5A must use RT9183-12GGF or AP7363-12E-13.

Q: What is the impact of the reduced operating temperature range in AP7363-12E-13? A: AP7363-12E-13 operates from -40°C to 85°C, compared to -40°C to 125°C for RT9183-12GG. Verify that your application's maximum operating temperature does not exceed 85°C. If higher temperature operation is required, use RT9183-12GGF or TLV117112 variants.

Q: Are all substitute parts ROHS3 compliant? A: Yes. RT9183-12GGF, AP7363-12E-13, TLV117112DCYR, and TLV117112DCYT are all ROHS3 compliant and REACH unaffected.

Q: What additional protection features do TLV117112 devices provide? A: TLV117112 devices include reverse polarity protection and under voltage lockout (UVLO) in addition to over current and over temperature protection. These features provide enhanced system-level protection compared to RT9183-12GG.

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