RT9170-30GV Equivalent & Substitute Parts

Part Overview

The RT9170-30GV is a linear voltage regulator IC from Richtek USA Inc. designed for positive fixed 3V output applications with 300mA current capacity in a compact SOT-23-3 surface mount package. This Active product is widely used in power management circuits requiring low-dropout regulation and thermal protection. Equivalent and substitute parts are identified when design flexibility, supply chain optimization, or inventory management requires alternative sources while maintaining electrical and mechanical compatibility.

Substiute Parts

RT9170-30GV

Richtek USA Inc.In Stock: 18055RT9170-30GV Datasheet

Current PartRFQ

AP130-30RG-7

Diodes IncorporatedIn Stock: 9249AP130-30RG-7 Datasheet

SimilarRFQ

AP7333-30SAG-7

Diodes IncorporatedIn Stock: 9432AP7333-30SAG-7 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT9170-30GV are qualified based on the following critical parameters that determine functional equivalence:

• Fixed output voltage of 3V
• Output current capacity of 300mA
• Maximum input voltage of 5.5V or greater
• Surface mount package compatibility (SOT-23-3 / SC-59 / TO-236-3)
• Positive output configuration with fixed regulation
• Active product status with current manufacturing support
• RoHS3 compliance for regulatory alignment

The identified substitutes (AP130-30RG-7 and AP7333-30SAG-7) meet these core requirements. Variations in dropout voltage, quiescent current, PSRR, and operating temperature ranges are secondary parameters that may influence selection based on specific application requirements but do not disqualify substitution eligibility.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain Active product status with current manufacturing support and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

The RT9170-30GV offers the lowest dropout voltage (0.24V) and lowest quiescent current (15 µA), making it optimal for applications with tight input voltage margins or extended battery life requirements. Its extended operating temperature range (-40°C ~ 125°C) supports high-temperature environments.

The AP130-30RG-7 provides a direct functional substitute with identical electrical specifications for output voltage and current, though with higher dropout voltage and quiescent current. Its SC-59R package variant maintains mechanical compatibility with SOT-23-3 footprints.

The AP7333-30SAG-7 offers the highest input voltage rating (6V) and superior PSRR performance (65dB), beneficial for applications requiring enhanced noise rejection or higher input voltage tolerance. Its MSL rating of 1 (Unlimited) indicates superior moisture resistance compared to the RT9170-30GV.

Selection should prioritize the RT9170-30GV for applications where low dropout voltage and minimal quiescent current are critical. Choose AP7333-30SAG-7 when higher input voltage capability or superior noise performance is required. The AP130-30RG-7 serves as a secondary alternative when primary options are unavailable.

Frequently Asked Questions (FAQ)

Q: Can AP130-30RG-7 and AP7333-30SAG-7 be used interchangeably with RT9170-30GV?

A: Both parts are functionally equivalent for applications requiring 3V fixed output at 300mA with SOT-23-3 package compatibility. However, differences in dropout voltage, quiescent current, and operating temperature ranges may affect performance in specific applications. Verify that the substitute part's electrical characteristics meet your circuit requirements before implementation.

Q: What is the impact of higher dropout voltage in substitute parts?

A: The AP130-30RG-7 (0.5V) and AP7333-30SAG-7 (0.55V) have higher dropout voltages compared to the RT9170-30GV (0.24V). This means they require proportionally higher input voltage to maintain regulated 3V output at 300mA. Applications with input voltages near the minimum specification may require the lower dropout voltage of the RT9170-30GV.

Q: Are the package dimensions identical across all three parts?

A: All three parts use SOT-23-3 / SC-59 / TO-236-3 package families with identical pin configurations and footprints, ensuring direct PCB layout compatibility. The AP130-30RG-7 is supplied in SC-59R variant, which maintains mechanical and electrical equivalence with standard SOT-23-3 packages.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences?

A: The RT9170-30GV has MSL 3 (168 Hours), while both Diodes Incorporated substitutes have MSL 1 (Unlimited). Lower MSL ratings indicate superior moisture resistance and longer shelf life without baking. For applications with extended storage or high-humidity environments, the AP130-30RG-7 or AP7333-30SAG-7 may be preferable.

Q: Which substitute is recommended for high-temperature applications?

A: The RT9170-30GV supports operating temperatures up to 125°C, while both substitutes are rated to 85°C maximum. For applications exceeding 85°C, the RT9170-30GV is the only qualified option among these three parts.

Q: How do PSRR differences affect circuit performance?

A: The AP7333-30SAG-7 provides the highest PSRR (65dB @ 100Hz), followed by AP130-30RG-7 (58dB @ 100Hz), and RT9170-30GV (40dB @ 1kHz). Higher PSRR values indicate superior rejection of input voltage ripple and noise. Applications requiring low-noise regulated output benefit from the AP7333-30SAG-7.