LM5025MTCX Forward Converter DC-DC Controller Equivalent & Substitute Parts

Part Overview

The LM5025MTCX is a forward converter regulator controller IC manufactured by Texas Instruments, designed for positive, isolation-capable step-up/step-down DC-DC conversion applications. This part is classified as discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The LM5025 series provides transistor driver output with integrated dead time control, frequency control, and soft start features for forward converter topologies requiring dual-output capability.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Function	Step-Up/Step-Down DC-DC Controller
Topology	Forward Converter
Output Type	Transistor Driver
Number of Outputs	2
Output Configuration	Positive, Isolation Capable
Voltage Supply Range (Vcc/Vdd)	8V ~ 15V
Switching Frequency Range	200kHz ~ 580kHz
Duty Cycle (Max)	80%
Control Features	Dead Time Control, Frequency Control, Ramp, Soft Start
Operating Temperature Range	-40°C ~ 125°C (TJ)
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the LM5025MTCX is determined by strict equivalence across the following critical parameters:

Topology: Forward Converter
Output Type: Transistor Driver
Number of Outputs: 2
Output Configuration: Positive, Isolation Capable
Voltage Supply Range: 8V ~ 15V
Switching Frequency Range: 200kHz ~ 580kHz
Control Features: Dead Time Control, Frequency Control, Ramp, Soft Start
Package / Case: 16-TSSOP
Operating Temperature Range: -40°C ~ 125°C

All substitute parts listed maintain identical electrical specifications and package form factor, ensuring direct functional replacement in forward converter applications. Variations in product status, packaging format (tape & reel vs. cut tape), and RoHS compliance do not affect electrical equivalence.

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Vcc/Vdd Range	Switching Frequency	Duty Cycle (Max)	Operating Temp	RoHS Status	Inventory
LM5025MTCX	Texas Instruments	Discontinued at DiGi Electronics	—	8V ~ 15V	200kHz ~ 580kHz	80%	-40°C ~ 125°C	RoHS non-compliant	2433 Pcs
LM5025MTCX/NOPB	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	8V ~ 15V	200kHz ~ 580kHz	80%	-40°C ~ 125°C	ROHS3 Compliant	1000100 Pcs
LM5025AMTCX/NOPB	Texas Instruments	Active	Tape & Reel (TR)	8V ~ 15V	200kHz ~ 580kHz	80%	-40°C ~ 125°C	ROHS3 Compliant	15870 Pcs
LM5025CMTCE/NOPB	Texas Instruments	Last Time Buy	Tape & Reel (TR)	8V ~ 15V	200kHz ~ 580kHz	91%	-40°C ~ 125°C	ROHS3 Compliant	1396 Pcs

Engineering Selection Recommendations

For applications currently using LM5025MTCX, the following selection criteria apply based on product status and compliance requirements:

Primary Recommendation: LM5025MTCX/NOPB offers the highest inventory availability (1,000,100 pcs) with active product status and ROHS3 compliance. This part maintains identical electrical specifications and packaging format, providing direct substitution with superior supply chain continuity.

Secondary Recommendation: LM5025AMTCX/NOPB provides active status with ROHS3 compliance and substantial inventory (15,870 pcs). Tape & Reel packaging is suitable for high-volume production environments.

Alternative Option: LM5025CMTCE/NOPB is available under Last Time Buy status with ROHS3 compliance. This part features a maximum duty cycle of 91% compared to 80% in other variants, providing extended operational flexibility for specific forward converter designs. Inventory is limited (1,396 pcs).

Compliance Consideration: The original LM5025MTCX is RoHS non-compliant. All substitute parts listed are ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and production.

Frequently Asked Questions (FAQ)

Q: Can LM5025MTCX/NOPB directly replace the original LM5025MTCX?

A: Yes. Both parts maintain identical electrical specifications, control features, and 16-TSSOP package form factor. The primary difference is product status (active vs. discontinued) and RoHS compliance. The /NOPB suffix indicates lead-free termination and ROHS3 compliance.

Q: What is the difference between LM5025AMTCX/NOPB and LM5025MTCX/NOPB?

A: Both parts are electrically equivalent with identical specifications. The primary difference is packaging format: LM5025AMTCX/NOPB is supplied in Tape & Reel (TR) format, while LM5025MTCX/NOPB is supplied in Cut Tape (CT) & Digi-Reel® format. Selection depends on production volume and assembly equipment compatibility.

Q: Why does LM5025CMTCE/NOPB have a higher maximum duty cycle (91% vs. 80%)?

A: LM5025CMTCE/NOPB is a variant within the LM5025 series with extended duty cycle capability. This specification difference does not affect substitution eligibility for applications designed within the 80% duty cycle range. For applications requiring duty cycles above 80%, this variant provides additional operational margin.

Q: Is the original LM5025MTCX still available for purchase?

A: The original LM5025MTCX is discontinued at DiGi Electronics. However, LM5025MTCX/NOPB (active status) and LM5025AMTCX/NOPB (active status) provide equivalent functionality with superior availability and current compliance certifications.

Q: Are all substitute parts compatible with existing PCB designs?

A: Yes. All substitute parts use the identical 16-TSSOP package with matching pinout and electrical characteristics. PCB layout and schematic designs require no modification for substitution.

Q: What is the significance of the /NOPB suffix?

A: The /NOPB suffix indicates lead-free termination plating and ROHS3 compliance. This designation reflects current manufacturing standards and environmental regulations for electronic components.

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