RT9715AGS Equivalent & Substitute Parts

Part Overview

The RT9715AGS is an N-Channel power switch/driver manufactured by Richtek USA Inc., designed for 1:1 switching applications with a maximum output current of 2A. This component operates across a load voltage range of 2.7V to 5.5V and features integrated fault protection including current limiting, over-temperature protection, reverse current blocking, and under-voltage lockout (UVLO). The device is packaged in an 8-SOIC surface mount package and is RoHS3 compliant.

The RT9715AGS is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this power switch topology.

Substiute Parts

RT9715AGS

Richtek USA Inc.In Stock: 6208RT9715AGS Datasheet

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FPF2702MX

onsemiIn Stock: 5184FPF2702MX Datasheet

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STMPS2151MTR

STMicroelectronicsIn Stock: 22766STMPS2151MTR Datasheet

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STMPS2171MTR

STMicroelectronicsIn Stock: 18003STMPS2171MTR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT9715AGS are selected based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Output configuration: High Side, N-Channel, 1:1 topology
• Package type: 8-SOIC surface mount form factor
• Load voltage range: Minimum 2.7V support required
• Output current capability: Minimum 2A required for direct substitution
• Fault protection: Current limiting, over-temperature, and UVLO protection
• Interface type: On/Off control

Substitute Parts Identified:

1. FPF2702MX (onsemi) – Supports extended voltage range (2.8V ~ 36V) with 2A output current and adjustable current limiting
2. STMPS2151MTR (STMicroelectronics) – Supports 2.7V ~ 5.5V with 500mA output current; suitable for lower-current applications
3. STMPS2171MTR (STMicroelectronics) – Supports 2.7V ~ 5.5V with 1A output current; intermediate current capability

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution (Full Current Capability):

FPF2702MX is the primary equivalent for RT9715AGS applications requiring the full 2A output current specification. Both devices maintain identical output current ratings and comparable on-resistance characteristics. FPF2702MX offers extended voltage range capability (2.8V ~ 36V) and improved moisture sensitivity rating (MSL 1 vs. MSL 3). The device is RoHS3 compliant and currently in obsolete status, matching the original part's lifecycle stage. Note that FPF2702MX features inverting input logic, requiring circuit design verification for control signal compatibility.

Current-Limited Substitution (Reduced Current Capability):

STMPS2171MTR provides 1A output current capability and maintains the 2.7V ~ 5.5V load voltage range with non-inverting input logic matching the RT9715AGS. This device is currently in active production status, offering superior long-term supply chain availability. Operating temperature range extends to 125°C (TJ), and moisture sensitivity is rated MSL 1 (unlimited). STMPS2171MTR is suitable for applications where output current requirements do not exceed 1A.

STMPS2151MTR is limited to 500mA output current and is appropriate only for low-current switching applications. This device shares identical voltage range and non-inverting input characteristics with the RT9715AGS.

All substitute parts maintain 8-SOIC package compatibility, enabling direct PCB footprint reuse without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can FPF2702MX be used as a direct replacement for RT9715AGS in all applications?

A: FPF2702MX matches the 2A output current and 8-SOIC package requirements. However, FPF2702MX implements inverting input logic while RT9715AGS uses non-inverting logic. Circuit design verification is required to confirm control signal compatibility. The extended voltage range (2.8V ~ 36V) is compatible with applications operating within the RT9715AGS range (2.7V ~ 5.5V).

Q: What is the difference between STMPS2151MTR and STMPS2171MTR?

A: Both devices are manufactured by STMicroelectronics and share identical electrical characteristics except for maximum output current. STMPS2151MTR provides 500mA, while STMPS2171MTR provides 1A. Both maintain the 2.7V ~ 5.5V load voltage range, non-inverting input logic, and 8-SOIC package. Selection depends on application current requirements.

Q: Why do the substitute parts have different operating temperature ranges?

A: Operating temperature specifications reflect junction temperature (TJ) or ambient temperature (TA) measurement methodology. FPF2702MX specifies -40°C ~ 85°C (TA), while STMPS2151MTR and STMPS2171MTR specify -40°C ~ 125°C (TJ). These differences do not affect compatibility for applications operating within standard industrial temperature ranges.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. RT9715AGS, FPF2702MX, STMPS2151MTR, and STMPS2171MTR are all RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

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

A: RT9715AGS is rated MSL 3 (168 hours), while all substitute parts are rated MSL 1 (unlimited). MSL 1 indicates superior moisture resistance and eliminates time-based storage and handling restrictions. This represents an improvement in component reliability and supply chain flexibility.

Q: Which substitute part offers the best long-term availability?

A: STMPS2151MTR and STMPS2171MTR are both in active production status, providing superior long-term supply chain availability compared to the obsolete RT9715AGS and FPF2702MX. For applications where 1A output current is sufficient, STMPS2171MTR is recommended for new designs.