TL598CDR Equivalent & Substitute Parts

Part Overview

The TL598CDR is a Power Management IC (PMIC) manufactured by Texas Instruments, functioning as a multi-topology DC-DC controller supporting Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, and Push-Pull topologies. The device provides transistor driver output with positive output configuration and dual outputs. Currently in Last Time Buy status with 2,686 pieces in stock, this part requires identification of active substitute options for continued design support and procurement planning.

Substiute Parts

TL598CDR

Texas InstrumentsIn Stock: 2762TL598CDR Datasheet

Current PartRFQ

TL594CDR

Texas InstrumentsIn Stock: 25131TL594CDR Datasheet

MFR RecommendedRFQ

AZ494CMTR-E1

Diodes IncorporatedIn Stock: 4557AZ494CMTR-E1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TL598CDR is determined by the following critical parameters:

Primary Compatibility Criteria:

• Package / Case: 16-SOIC (0.154", 3.90mm Width) — physical and electrical pin compatibility
• Voltage - Supply (Vcc/Vdd): 7V ~ 40V — input voltage range compatibility
• Output Type: Transistor Driver — functional output stage requirement
• Number of Outputs: 2 — dual output configuration
• Output Configuration: Positive — output polarity requirement
• Topology Support: Multi-topology capability (Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull)

Secondary Compatibility Criteria:

• RoHS3 Compliance — regulatory requirement
• Surface Mount Mounting Type — assembly process compatibility

Substitute parts must maintain compatibility across all primary criteria. Variations in switching frequency, duty cycle maximum, and synchronous rectifier capability are permissible when the substitute part supports the required topologies and output configuration within the specified supply voltage range.

Parameter Comparison

Engineering Selection Recommendations

TL594CDR (Texas Instruments) — Recommended Primary Substitute

The TL594CDR is the manufacturer-recommended substitute for the TL598CDR. Both devices are Texas Instruments products with identical package, supply voltage range, and multi-topology support. The TL594CDR is in Active product status with significantly higher inventory availability (25,100 pieces). The TL594CDR provides extended switching frequency range (1kHz ~ 300kHz) and higher maximum duty cycle (97%), offering greater design flexibility. Both parts maintain ROHS3 compliance and identical operating temperature range. Pin-level compatibility and functional equivalence are confirmed by Texas Instruments.

AZ494CMTR-E1 (Diodes Incorporated) — Limited Compatibility Substitute

The AZ494CMTR-E1 shares identical 16-SOIC packaging and positive output configuration. However, this device is a fixed 5V Buck regulator with single-topology support, fundamentally different from the multi-topology controller architecture of the TL598CDR. The AZ494CMTR-E1 is suitable only for applications requiring fixed 5V output with Buck topology and 200mA output current. The reduced supply voltage maximum (36V vs. 40V) and fixed output type eliminate this part as a general-purpose substitute. This device is appropriate only for specific 5V buck converter applications.

Frequently Asked Questions (FAQ)

Q: Can the TL594CDR directly replace the TL598CDR in existing designs?

A: Yes. The TL594CDR is the manufacturer-recommended substitute with identical 16-SOIC package, supply voltage range (7V ~ 40V), dual output configuration, and multi-topology support. Pin compatibility and functional equivalence are confirmed. Design verification is recommended for applications operating at the maximum duty cycle limits.

Q: What are the key differences between TL598CDR and TL594CDR?

A: The TL594CDR provides extended switching frequency range (1kHz ~ 300kHz vs. 100kHz fixed) and higher maximum duty cycle (97% vs. 45%). The TL594CDR lacks synchronous rectifier capability present in the TL598CDR. Both maintain identical supply voltage range, package, and multi-topology support.

Q: Is the AZ494CMTR-E1 suitable as a general substitute?

A: No. The AZ494CMTR-E1 is a fixed 5V Buck regulator, not a multi-topology controller. It is suitable only for applications requiring fixed 5V output with Buck topology and 200mA output current. Applications requiring Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, or Push-Pull topologies cannot use this device.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both TL594CDR and AZ494CMTR-E1 are ROHS3 compliant, matching the TL598CDR compliance status.

Q: What is the inventory status of substitute parts?

A: TL594CDR has 25,100 pieces in stock (Active status). AZ494CMTR-E1 has 4,507 pieces in stock (Active status). Both exceed the TL598CDR inventory (2,686 pieces, Last Time Buy status).

Q: Can switching frequency differences affect circuit performance?

A: Yes. The TL598CDR operates at fixed 100kHz, while the TL594CDR supports 1kHz ~ 300kHz. Circuit design must account for frequency-dependent component values (inductors, capacitors) and EMI characteristics. Frequency control capability of the TL594CDR may require design modifications.

Q: Are there operating temperature range considerations?

A: The TL598CDR and TL594CDR both operate 0°C ~ 70°C. The AZ494CMTR-E1 operates -40°C ~ 85°C, providing extended low-temperature capability. Applications requiring operation below 0°C must use the AZ494CMTR-E1 only if topology requirements are met.