RT9163-50GG Equivalent & Substitute Parts

Part Overview

The RT9163-50GG is a linear voltage regulator IC from Richtek USA Inc. designed to provide a fixed 5V output with 500mA current capacity in a surface-mount SOT-223 package. This Active product is widely used in power management applications requiring positive fixed voltage regulation with integrated over-current and over-temperature protection. Alternative models may be required due to inventory constraints, regional availability, or specific application requirements within the allowed electrical and mechanical parameter ranges.

Key Parameters

Parameter	Value
Manufacturer	Richtek USA Inc.
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Fixed)	5V
Current - Output	500mA
Voltage - Input (Max)	15V
Current - Quiescent (Iq)	8 mA
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	TO-261-4, TO-261AA
Supplier Device Package	SOT-223
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the RT9163-50GG are qualified based on the following criteria:

Critical Parameters for Substitution:

Output voltage: 5V fixed (exact match required)
Output configuration: Positive (exact match required)
Mounting type: Surface Mount (exact match required)
Package type: SOT-223 or SOT-223-3 (compatible footprints)
Operating temperature range: -40°C ~ 125°C (exact match required)
Protection features: Over Current and Over Temperature (minimum requirement)
RoHS3 Compliance: Required for regulatory alignment

Allowable Parameter Variations:

Current output capacity: 150mA or higher (substitutes must support minimum 150mA; 500mA substitutes provide full compatibility)
Maximum input voltage: 15V or higher (16V substitutes provide extended input range)
Quiescent current: May vary (lower values preferred for power efficiency)
Dropout voltage: Specification provided where available
PSRR and additional protection features: Enhancements acceptable

The two qualified substitutes meet all critical parameters while offering variations in current capacity and quiescent current characteristics.

Parameter Comparison

Parameter	RT9163-50GG	MCP1754ST-5002E/DB	MIC5209-5.0YS
Manufacturer	Richtek USA Inc.	Microchip Technology	Microchip Technology
Output Voltage (Fixed)	5V	5V	5V
Output Configuration	Positive	Positive	Positive
Current - Output	500mA	150mA	500mA
Voltage - Input (Max)	15V	16V	16V
Current - Quiescent (Iq)	8 mA	90 µA	170 µA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Supplier Device Package	SOT-223	SOT-223-3	SOT-223-3
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature, Reverse Polarity
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

MCP1754ST-5002E/DB (Microchip Technology)

This substitute is suitable for applications where output current requirements do not exceed 150mA. The MCP1754ST-5002E/DB offers significantly lower quiescent current (90 µA versus 8 mA), making it advantageous for battery-powered or low-power standby applications. The extended maximum input voltage (16V) provides additional input range margin. All regulatory requirements including ROHS3 compliance and operating temperature range are met. Packaging is SOT-223-3 with Tape & Reel delivery format.

MIC5209-5.0YS (Microchip Technology)

This substitute provides full current capacity equivalence at 500mA, matching the RT9163-50GG output current specification. The MIC5209-5.0YS includes enhanced protection with reverse polarity protection in addition to over-current and over-temperature functions. Maximum input voltage is extended to 16V. Quiescent current is 170 µA, higher than the original but acceptable for most applications. All regulatory requirements including ROHS3 compliance and operating temperature range are met. Packaging is SOT-223-3 with Tube delivery format.

Frequently Asked Questions (FAQ)

Q: Can MCP1754ST-5002E/DB replace RT9163-50GG in all applications?

A: MCP1754ST-5002E/DB is suitable only for applications requiring 150mA or less output current. If your circuit draws more than 150mA from the 5V rail, this substitute will not function properly. For applications within the 150mA limit, all electrical and mechanical parameters are compatible.

Q: What is the difference between SOT-223 and SOT-223-3 packages?

A: Both packages are mechanically and electrically compatible for this application. SOT-223 and SOT-223-3 refer to the same physical footprint (TO-261-4, TO-261AA) used in surface-mount PCB designs. Pin configurations and land patterns are identical for linear regulator applications.

Q: Why does MIC5209-5.0YS have higher quiescent current than the original?

A: Quiescent current variation is an allowable parameter difference among qualified substitutes. The MIC5209-5.0YS quiescent current of 170 µA remains acceptable for most applications. This specification should be evaluated only if your design has specific low-power standby requirements where every microamp matters.

Q: Does MIC5209-5.0YS reverse polarity protection affect circuit design?

A: Reverse polarity protection is an additional safety feature that does not require circuit design changes. This enhancement provides additional protection against accidental input polarity reversal without affecting normal operation.

Q: Are all three parts ROHS3 compliant?

A: Yes. RT9163-50GG, MCP1754ST-5002E/DB, and MIC5209-5.0YS are all ROHS3 compliant and suitable for applications with RoHS regulatory requirements.

Q: What is the maximum input voltage for each part?

A: RT9163-50GG supports 15V maximum input. Both MCP1754ST-5002E/DB and MIC5209-5.0YS support 16V maximum input, providing 1V additional margin for input voltage transients.

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