TL3844DG4-8 Equivalent & Substitute Parts

Part Overview

The TL3844DG4-8 is a Boost, Flyback, Forward Regulator controller IC manufactured by Texas Instruments, designed for positive output step-up and step-up/step-down DC-DC conversion applications. This device operates as a transistor driver with frequency control capabilities in an 8-SOIC surface mount package. The TL3844DG4-8 is currently in Last Time Buy status, making identification of active equivalent and substitute parts essential for ongoing design support and procurement planning.

Substiute Parts

TL3844DG4-8

Texas InstrumentsIn Stock: 1806TL3844DG4-8 Datasheet

Current PartRFQ

TL3844DR-8

Texas InstrumentsIn Stock: 1767TL3844DR-8 Datasheet

MFR RecommendedRFQ

UC3844BD1013TR

STMicroelectronicsIn Stock: 2203UC3844BD1013TR Datasheet

MFR RecommendedRFQ

TL3844BD-8

Texas InstrumentsIn Stock: 1886TL3844BD-8 Datasheet

Parametric EquivalentRFQ

TL3844D-8

Texas InstrumentsIn Stock: 2046TL3844D-8 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL3844DG4-8 is determined by strict equivalence across the following critical parameters:

• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Voltage - Supply (Vcc/Vdd): 10V ~ 30V
• Frequency - Switching: Up to 500kHz
• Duty Cycle (Max): 48%
• Output Type: Transistor Driver
• Function: Step-Up, Step-Up/Step-Down
• Output Configuration: Positive
• Topology: Boost, Flyback, Forward
• Number of Outputs: 1
• Operating Temperature: 0°C ~ 70°C
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories:

MFR Recommended Substitutes: Parts recommended by the original manufacturer as direct replacements, maintaining identical electrical and mechanical specifications with active product status.

Parametric Equivalents: Parts meeting all critical electrical and mechanical parameters but may differ in product status, packaging format, or manufacturer, suitable for applications where functional equivalence is the primary requirement.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: TL3844DR-8 is the preferred substitute for the TL3844DG4-8. Both parts are manufactured by Texas Instruments with identical electrical specifications and package configuration. The TL3844DR-8 maintains Active product status, ensuring long-term availability and supply chain stability. The difference in packaging format (Tape & Reel versus Tube) does not affect functional performance and is determined by procurement volume and handling requirements.

Secondary Recommendation: UC3844BD1013TR manufactured by STMicroelectronics is a parametric equivalent suitable for applications requiring cross-manufacturer flexibility. This part maintains all critical electrical parameters and ROHS3 compliance. The UC3844BD1013TR offers Isolation Capable output configuration, providing additional design flexibility for isolated topologies. Active product status ensures continued availability.

Alternative Consideration: TL3844BD-8 and TL3844D-8 are parametric equivalents from Texas Instruments meeting all functional requirements. Both parts carry Last Time Buy status, indicating limited future availability. These parts are suitable for immediate replacement but should not be selected for new long-term production designs.

Frequently Asked Questions (FAQ)

Q: Can TL3844DR-8 be used as a direct replacement for TL3844DG4-8?

A: Yes. Both parts share identical electrical specifications, package configuration, and functional topology. The only difference is packaging format (Tape & Reel versus Tube), which does not affect circuit performance. TL3844DR-8 is the recommended substitute due to its Active product status.

Q: What is the difference between TL3844DG4-8 and UC3844BD1013TR?

A: Both parts meet the core electrical parameters for boost, flyback, and step-up/step-down DC-DC control. UC3844BD1013TR is manufactured by STMicroelectronics and includes Isolation Capable output configuration. The UC3844BD1013TR operates at temperature junction (TJ) rather than ambient temperature (TA). Both are ROHS3 compliant with identical supply voltage and switching frequency specifications.

Q: Why is TL3844DG4-8 in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer is discontinuing this specific part number variant. Customers should transition to active alternatives such as TL3844DR-8 to ensure long-term supply chain continuity.

Q: Are all substitute parts compatible with existing PCB layouts designed for TL3844DG4-8?

A: Yes. All listed substitute parts use the 8-SOIC package with identical pin configuration and spacing (0.154", 3.90mm Width). PCB layouts require no modification for electrical substitution. Packaging format differences (Tube, Tape & Reel, Cut Tape) affect only handling and storage procedures, not board-level compatibility.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts listed are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). All parts carry REACH Unaffected status and EAR99 export classification. Compliance certifications are identical across all listed alternatives.