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RT9712AGF Equivalent & Substitute Parts
Part Overview
The RT9712AGF is a Power Switch/Driver IC manufactured by Richtek USA Inc., configured as a 1:1 N-Channel high-side switch with 1.5A output current capability in an 8-MSOP package. This device is classified as Obsolete, which necessitates identification of functionally equivalent active alternatives for new designs and ongoing production requirements. The RT9712AGF provides general-purpose power switching with integrated current limiting, over-temperature protection, reverse current blocking, and UVLO fault protection.
Substiute Parts
Key Parameters
| Parameter | RT9712AGF |
|---|---|
| Manufacturer | Richtek USA Inc. |
| Category | Power Management (PMIC) |
| Switch Type | General Purpose |
| Output Type | N-Channel |
| Number of Outputs | 2 |
| Ratio - Input:Output | 1:1 |
| Output Configuration | High Side |
| Current - Output (Max) | 1.5A |
| Voltage - Load | 2.7V ~ 5.5V |
| Rds On (Typ) | 90mOhm |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| Mounting Type | Surface Mount |
| Fault Protection | Current Limiting (Fixed), Over Temperature, Reverse Current, UVLO |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the RT9712AGF is determined by the following critical parameters:
Channel Type & Output Configuration: The RT9712AGF is an N-Channel high-side switch. Substitute parts must maintain N-Channel topology to preserve circuit functionality and gate drive requirements.
Input:Output Ratio: The 1:1 ratio defines the control architecture. Parts with 1:2 ratios have different internal multiplexing and control logic, creating functional incompatibility despite similar electrical ratings.
Current Rating: The 1.5A maximum output current establishes the load-handling capability. Substitutes must meet or exceed this specification to ensure adequate headroom for the intended application.
Voltage Range: The 2.7V ~ 5.5V load voltage range defines the operating envelope. Substitutes must support this range or a compatible superset.
Package Compatibility: The 8-MSOP package footprint is a mechanical constraint. Substitutes must use identical or pin-compatible packages.
Fault Protection Features: Current limiting, over-temperature, reverse current, and UVLO protection are mandatory safety functions. All substitutes must include these protections.
Based on these criteria, the following parts qualify as direct substitutes:
Direct N-Channel 1:1 Substitutes: None identified in the provided substitute list. All listed alternatives are 1:2 ratio devices or P-Channel variants.
Functional Alternatives (1:2 N-Channel, N-Channel Output): TPS2064CDGN, TPS2064CDGN-2, TPS2064CDGNR-2, TPS2066CDGN-2. These devices share N-Channel topology, high-side configuration, and equivalent fault protection but operate with 1:2 input:output multiplexing.
Parameter Comparison
| Parameter | RT9712AGF | TPS2064CDGN | TPS2064CDGN-2 | TPS2064CDGNR-2 | TPS2066CDGN-2 |
|---|---|---|---|---|---|
| Manufacturer | Richtek USA Inc. | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Type | N-Channel | N-Channel | N-Channel | N-Channel | N-Channel |
| Ratio - Input:Output | 1:1 | 1:2 | 1:2 | 1:2 | 1:2 |
| Output Configuration | High Side | High Side | High Side | High Side | High Side |
| Current - Output (Max) | 1.5A | 1.5A | 1.5A | 1.5A | 1A |
| Voltage - Load | 2.7V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Rds On (Typ) | 90mOhm | 70mOhm | 70mOhm | 70mOhm | 70mOhm |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) |
| Package / Case | 8-TSSOP, 8-MSOP | 8-TSSOP, 8-MSOP Exposed Pad | 8-TSSOP, 8-MSOP Exposed Pad | 8-TSSOP, 8-MSOP Exposed Pad | 8-TSSOP, 8-MSOP Exposed Pad |
| Fault Protection | Current Limiting, Over Temperature, Reverse Current, UVLO | Current Limiting, Over Temperature, Reverse Current, UVLO | Current Limiting, Over Temperature, Reverse Current, UVLO | Current Limiting, Over Temperature, Reverse Current, UVLO | Current Limiting, Over Temperature, Reverse Current, UVLO |
| Product Status | Obsolete | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Selection Criteria:
The RT9712AGF is Obsolete, requiring transition to active alternatives. Among the N-Channel high-side switch options provided, the Texas Instruments TPS2064 series represents the most direct functional replacement.
TPS2064CDGN-2 (Recommended for New Designs): This part is Active with unlimited moisture sensitivity rating (MSL 1), indicating superior long-term reliability and availability. It provides 1.5A output current matching the RT9712AGF specification, with improved Rds On (70mOhm vs. 90mOhm) and extended operating temperature range (-40°C to 125°C junction temperature). The 1:2 input:output ratio requires circuit redesign to accommodate dual-output switching architecture.
TPS2064CDGNR-2 (Cut Tape & Digi-Reel Packaging): Functionally identical to TPS2064CDGN-2 with alternative packaging format. MSL 2 rating (1 Year) indicates standard moisture sensitivity. Inventory availability is lower (3,846 units vs. 50,228 units for CDGN-2).
TPS2066CDGN-2 (Lower Current Alternative): Active status with 1A maximum output current. Suitable only for applications where 1A output is sufficient. Maintains all other electrical and protection specifications of the TPS2064 series.
Voltage Range Consideration: TPS2064/TPS2066 series supports 4.5V ~ 5.5V load voltage, narrower than the RT9712AGF range of 2.7V ~ 5.5V. Applications requiring operation below 4.5V require alternative solutions outside the provided substitute list.
Compliance Status: All recommended substitutes maintain ROHS3 compliance and EAR99 export classification, matching the original part's regulatory profile.
Frequently Asked Questions (FAQ)
Q: Can TPS2064CDGN-2 be used as a direct pin-for-pin replacement for RT9712AGF?
A: No. While both devices use the 8-MSOP package, the 1:2 input:output ratio creates different internal architecture and control logic. Circuit redesign is required to accommodate the dual-output switching configuration. Pin assignments may differ; datasheet comparison is mandatory before PCB layout.
Q: What is the significance of the 1:1 versus 1:2 input:output ratio?
A: The 1:1 ratio means one control input switches one output. The 1:2 ratio means one control input switches two independent outputs. This affects gate drive sequencing, control signal timing, and load distribution. Direct substitution without circuit modification will result in functional failure.
Q: Why does TPS2064CDGN-2 have a narrower voltage range (4.5V ~ 5.5V) compared to RT9712AGF (2.7V ~ 5.5V)?
A: The TPS2064 series is optimized for 5V logic and power supply applications. Applications requiring operation at 2.7V to 4.4V load voltage cannot use this substitute. Alternative N-Channel high-side switches with extended low-voltage support must be evaluated.
Q: What is the difference between TPS2064CDGN-2 and TPS2064CDGNR-2?
A: Both parts are electrically identical. The difference is packaging format: CDGN-2 is supplied in Tube packaging, while CDGNR-2 is supplied in Cut Tape & Digi-Reel format. CDGN-2 has superior moisture sensitivity rating (MSL 1 Unlimited vs. MSL 2 1 Year), indicating better shelf-life stability.
Q: Are the Diodes Incorporated AP2162AMPG-13, AP2172AMPG-13, and AP2182AMPG-13 suitable substitutes?
A: No. These are P-Channel devices, not N-Channel. P-Channel and N-Channel switches have fundamentally different gate drive requirements, voltage biasing, and circuit topologies. Substitution would require complete circuit redesign and is not recommended as a direct alternative.
Q: What does "Exposed Pad" mean in the package designation?
A: The exposed pad is a thermal connection point on the underside of the IC package. It improves heat dissipation by allowing direct solder connection to the PCB ground plane. This feature enhances thermal performance compared to packages without exposed pads, particularly important for higher current applications.
Q: Is the improved Rds On (70mOhm vs. 90mOhm) in TPS2064 series significant?
A: Yes. Lower Rds On reduces conduction losses and heat generation. At 1.5A output current, the TPS2064 dissipates approximately 0.158W (1.5² × 0.070) compared to 0.203W for RT9712AGF (1.5² × 0.090). This 22% reduction in power dissipation improves efficiency and thermal margin.
Q: Can I use TPS2066CDGN-2 if my application only requires 1A output current?
A: Yes, if your application's maximum load current does not exceed 1A. TPS2066CDGN-2 is rated for 1A maximum output, providing adequate margin for 1A applications. All other electrical and protection specifications remain equivalent to TPS2064 series.
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