RT9166-18GXL Equivalent & Substitute Parts

Part Overview

The RT9166-18GXL is a linear voltage regulator IC manufactured by Richtek USA Inc., designed to deliver a fixed 1.8V output at 300mA in a surface-mount SOT-89-3 package. This active product is widely used in power management applications requiring low-dropout regulation with integrated over-current and over-temperature protection. Substitute parts are identified based on matching electrical specifications, package compatibility, and regulatory compliance to ensure functional equivalence in circuit applications.

Substiute Parts

RT9166-18GXL

Richtek USA Inc.In Stock: 960RT9166-18GXL Datasheet

Current PartRFQ

AP130-18YG-13

Diodes IncorporatedIn Stock: 12953AP130-18YG-13 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT9166-18GXL are identified based on the following critical parameters that determine functional equivalence:

• Output Voltage: Fixed 1.8V output
• Output Current: 300mA capability
• Input Voltage Range: Maximum 5.5V
• Package Type: SOT-89-3 (TO-243AA) surface-mount configuration
• Output Configuration: Positive fixed regulator
• Protection Features: Over-current and over-temperature protection
• Operating Temperature Range: -40°C to 85°C
• Regulatory Compliance: ROHS3 compliant

The AP130-18YG-13 manufactured by Diodes Incorporated meets all these critical parameters, making it a direct functional substitute. Both parts share identical output voltage, current rating, input voltage maximum, package type, and operating temperature range. Differences in quiescent current, dropout voltage, and PSRR do not prevent substitution but represent performance variations within acceptable engineering tolerances for this regulator category.

Parameter Comparison

Engineering Selection Recommendations

Both the RT9166-18GXL and AP130-18YG-13 are active products with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement. Selection between these parts should be based on:

• Availability: AP130-18YG-13 has higher inventory (12,900 pcs vs. 922 pcs)
• Packaging Format: AP130-18YG-13 is supplied in Tape & Reel format; RT9166-18GXL packaging format not specified
• Quiescent Current: AP130-18YG-13 offers lower quiescent current (100 µA vs. 300 µA), beneficial for battery-powered applications
• Dropout Voltage: RT9166-18GXL provides lower dropout voltage (0.23V vs. 0.5V), advantageous in low-input-voltage scenarios
• Protection: AP130-18YG-13 includes additional short-circuit protection

Both parts are suitable for direct substitution in applications where the specified electrical and thermal parameters are met.

Frequently Asked Questions (FAQ)

Q: Can AP130-18YG-13 directly replace RT9166-18GXL on a PCB?

A: Yes. Both parts use the SOT-89-3 package (TO-243AA) with identical pin configuration and electrical specifications for output voltage (1.8V), output current (300mA), and input voltage range (5.5V max). No circuit modifications are required.

Q: What is the difference in dropout voltage between these parts?

A: RT9166-18GXL has a typical dropout voltage of 0.23V at 300mA, while AP130-18YG-13 has a maximum dropout voltage of 0.5V at 300mA. In applications with tight input voltage margins, the RT9166-18GXL provides better performance. For most standard applications, both are acceptable.

Q: Does the lower quiescent current of AP130-18YG-13 affect circuit operation?

A: No. The quiescent current difference (100 µA vs. 300 µA) does not affect regulator functionality. The lower quiescent current of AP130-18YG-13 reduces standby power consumption, which is beneficial in battery-powered or low-power applications.

Q: Are there any temperature or compliance differences?

A: Both parts operate across -40°C to 85°C and are ROHS3 compliant with REACH unaffected status. No compliance or thermal performance differences exist.

Q: What does the additional short-circuit protection in AP130-18YG-13 provide?

A: Short-circuit protection in AP130-18YG-13 provides an additional safety layer by limiting output current during fault conditions. Both parts include over-current and over-temperature protection; AP130-18YG-13 adds dedicated short-circuit detection.

Q: Can I use these parts interchangeably in production?

A: Yes, provided your application requirements are met by both parts' electrical specifications. Verify that the dropout voltage and quiescent current characteristics are acceptable for your specific circuit design before implementation.