TL2844DRG4 Equivalent & Substitute Parts

Part Overview

The TL2844DRG4 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 part is classified as a Power Management PMIC with transistor driver output capability. The TL2844DRG4 is currently discontinued at DiGi Electronics, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain identical electrical specifications and package compatibility to ensure direct replacement without circuit redesign.

Substiute Parts

TL2844DRG4

Texas InstrumentsIn Stock: 993TL2844DRG4 Datasheet

Current PartRFQ

TL2844DR

Texas InstrumentsIn Stock: 6182TL2844DR Datasheet

MFR RecommendedRFQ

TL2844BDR

Texas InstrumentsIn Stock: 2217TL2844BDR Datasheet

Parametric EquivalentRFQ

UC2844BDR2G

onsemiIn Stock: 6313UC2844BDR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TL2844DRG4 are qualified based on the following critical parameters that determine functional equivalence:

Electrical Equivalence Criteria:

• Output Type: Transistor Driver
• Function: Step-Up, Step-Up/Step-Down capability
• Voltage - Supply (Vcc/Vdd): 10V ~ 30V minimum range
• Frequency - Switching: Up to 500kHz
• Duty Cycle (Max): 48%
• Number of Outputs: 1
• Output Phases: 1
• Control Features: Frequency Control

Mechanical Equivalence Criteria:

• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Compliance Criteria:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The TL2844DR and TL2844BDR are direct Texas Instruments equivalents sharing identical base product number (TL2844) with full parameter alignment. The UC2844BDR2G from onsemi provides parametric equivalence with topology compatibility (Boost, Flyback) and meets all electrical and mechanical requirements, though with extended supply voltage range (10V ~ 36V) and narrower operating temperature range (-25°C ~ 85°C).

Parameter Comparison

Engineering Selection Recommendations

TL2844DR (MFR Recommended): This Texas Instruments part is the primary substitute for the discontinued TL2844DRG4. It maintains identical electrical and mechanical specifications with active product status and higher inventory availability (6112 pcs). Selection of TL2844DR is appropriate for all applications previously using TL2844DRG4 without circuit modification.

TL2844BDR (Parametric Equivalent): This Texas Instruments variant provides full parametric equivalence to TL2844DRG4 with active product status. It is suitable for direct replacement in all circuit topologies supporting boost, flyback, and forward regulation.

UC2844BDR2G (Cross-Manufacturer Equivalent): The onsemi UC2844BDR2G offers parametric equivalence with extended supply voltage range (10V ~ 36V) and reduced operating temperature range (-25°C ~ 85°C). This part is appropriate for applications operating within the narrower temperature range and requiring higher supply voltage capability. All parts maintain ROHS3 compliance and MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can TL2844DR be used as a direct replacement for TL2844DRG4? A: Yes. TL2844DR is electrically and mechanically identical to TL2844DRG4, with the same 14-SOIC package, supply voltage range (10V ~ 30V), switching frequency (up to 500kHz), and operating temperature range (-40°C ~ 85°C). No circuit redesign is required.

Q: What is the difference between TL2844DR and TL2844BDR? A: Both parts are Texas Instruments TL2844 base product variants with identical electrical specifications and 14-SOIC packaging. The primary difference is product designation; both are suitable for TL2844DRG4 replacement.

Q: Can UC2844BDR2G replace TL2844DRG4 in all applications? A: UC2844BDR2G is compatible with applications operating within its specified temperature range (-25°C ~ 85°C). Applications requiring operation below -25°C must use TL2844DR or TL2844BDR. The extended supply voltage range (10V ~ 36V) of UC2844BDR2G provides additional design flexibility for higher voltage applications.

Q: Are all substitute parts in the same package? A: Yes. All substitute parts (TL2844DR, TL2844BDR, UC2844BDR2G) use 14-SOIC (0.154", 3.90mm Width) surface mount packaging, enabling direct PCB footprint compatibility.

Q: Do all parts meet RoHS and MSL requirements? A: Yes. All parts listed are ROHS3 compliant with MSL 1 (Unlimited) rating, meeting current environmental and moisture sensitivity standards.

Q: What topology support does UC2844BDR2G provide? A: UC2844BDR2G supports Boost and Flyback topologies. TL2844DR and TL2844BDR additionally support Forward topology. For Forward topology applications, use TL2844DR or TL2844BDR.