TL594CDRG4 Equivalent & Substitute Parts

Part Overview

The TL594CDRG4 is a Power Management IC (PMIC) from Texas Instruments functioning as a multi-topology DC-DC controller. This device supports Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, and Push-Pull topologies with positive output configuration. The TL594CDRG4 is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

TL594CDRG4

Texas InstrumentsIn Stock: 866TL594CDRG4 Datasheet

Current PartRFQ

TL594CDR

Texas InstrumentsIn Stock: 25131TL594CDR Datasheet

Parametric EquivalentRFQ

TL494BDR2G

onsemiIn Stock: 6554TL494BDR2G Datasheet

MFR RecommendedRFQ

TL494CDR2G

onsemiIn Stock: 17458TL494CDR2G Datasheet

MFR RecommendedRFQ

TL594CDR2G

onsemiIn Stock: 17615TL594CDR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TL594CDRG4 are grouped based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Package / Case: 16-SOIC form factor (mandatory for pin compatibility)
• Voltage - Supply (Vcc/Vdd): 7V ~ 40V range (power supply compatibility)
• Output Type: Transistor Driver (functional equivalence)
• Output Configuration: Positive (output polarity match)
• Number of Outputs: 2 (output channel count)
• Control Features: Dead Time Control, Frequency Control (control capability match)
• RoHS Status: ROHS3 Compliant (regulatory compliance)

Topology Considerations: Substitute parts must support at least the core topologies required for the application. The TL594CDRG4 supports multiple topologies; substitutes may support a subset while maintaining functional compatibility for specific applications.

Frequency and Duty Cycle: Operating frequency range and maximum duty cycle determine switching performance characteristics. Substitutes with equivalent or superior specifications maintain design compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Parametric Equivalent: TL594CDR is the primary substitute for TL594CDRG4. Both parts are from Texas Instruments with identical electrical specifications, topology support, and operating parameters. TL594CDR is currently active in production with higher inventory availability (25,100 pcs vs. 816 pcs). This part provides seamless design compatibility with no circuit modifications required.

Cross-Manufacturer Alternatives: TL494BDR2G, TL494CDR2G, and TL594CDR2G are onsemi SWITCHMODE™ series controllers offering functional substitution. These parts share the 16-SOIC package, identical supply voltage range, and core control features. However, topology support is limited to Buck and Push-Pull configurations, and maximum duty cycle specifications differ (48% to 96% vs. 97%). These alternatives are suitable for applications utilizing only Buck or Push-Pull topologies.

Product Status Consideration: All substitute parts listed are active in production, ensuring long-term availability and supply chain stability compared to the discontinued TL594CDRG4.

Compliance and Certification: All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, matching the original part's regulatory and environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can TL594CDR directly replace TL594CDRG4 without circuit modifications? A: Yes. TL594CDR is a parametric equivalent with identical electrical specifications, topology support, and operating characteristics. No circuit modifications are required for direct substitution.

Q: What is the key difference between TL594CDRG4 and the onsemi TL494/TL594 alternatives? A: The primary difference is topology support. TL594CDRG4 supports Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, and Push-Pull topologies. onsemi alternatives (TL494BDR2G, TL494CDR2G, TL594CDR2G) support only Buck and Push-Pull topologies. Substitution is valid only for applications using these supported topologies.

Q: Are there operating temperature differences between substitute parts? A: Yes. TL594CDRG4 and TL594CDR operate at 0°C ~ 70°C (TA). TL494BDR2G extends to -40°C ~ 125°C (TJ), and TL594CDR2G to -40°C ~ 85°C (TA). For applications requiring extended temperature range, TL494BDR2G or TL594CDR2G provide broader operating conditions.

Q: Do all substitute parts use the same 16-SOIC package? A: Yes. All substitute parts use the 16-SOIC (0.154", 3.90mm Width) package, ensuring mechanical and electrical pin compatibility with TL594CDRG4.

Q: What is the maximum duty cycle for each substitute part? A: TL594CDRG4 and TL594CDR support 97% maximum duty cycle. TL494BDR2G and TL494CDR2G support 48% maximum duty cycle. TL594CDR2G supports 96% maximum duty cycle. Verify duty cycle requirements for your specific application topology.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed are ROHS3 compliant with MSL Level 1 rating, matching the original part's regulatory compliance.

Q: What is the switching frequency range for substitute parts? A: TL594CDRG4 and TL594CDR support 1kHz ~ 300kHz. TL494BDR2G and TL494CDR2G are fixed at 200kHz. TL594CDR2G supports up to 300kHz. Verify frequency requirements for your application design.