LM5035MH/NOPB Half-Bridge DC-DC Controller Equivalent & Substitute Parts

Part Overview

The LM5035MH/NOPB is a half-bridge regulator controller IC from Texas Instruments designed for positive, isolation-capable step-up/step-down DC-DC conversion applications. This device operates across a wide supply voltage range of 13V to 105V and integrates synchronous rectifier control with frequency synchronization capabilities. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for design continuity and long-term supply chain planning.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Function	Step-Up/Step-Down DC-DC Controller
Topology	Half-Bridge
Output Type	Transistor Driver
Output Configuration	Positive, Isolation Capable
Number of Outputs	1
Output Phases	1
Voltage Supply Range (Vcc/Vdd)	13V ~ 105V
Switching Frequency	200kHz, 500kHz
Synchronous Rectifier	Yes
Clock Sync	Yes
Control Features	Frequency Control, Ramp, Soft Start
Operating Temperature Range	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount
Package	20-PowerTSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the LM5035MH/NOPB is determined by strict equivalence across the following critical parameters:

Topology: Half-Bridge configuration
Output Type: Transistor Driver
Output Configuration: Positive, Isolation Capable
Voltage Supply Range: 13V ~ 105V
Switching Frequency: 200kHz, 500kHz
Synchronous Rectifier: Yes
Clock Sync: Yes
Control Features: Frequency Control, Ramp, Soft Start
Operating Temperature: -40°C ~ 125°C (TJ)
Package: 20-PowerTSSOP
Mounting Type: Surface Mount

All substitute parts listed maintain identical electrical and mechanical specifications across these parameters. Differences in product status, packaging format (Tube vs. standard), and inventory availability do not affect functional interchangeability in circuit design.

Parameter Comparison

Parameter	LM5035MH/NOPB	LM5035MHX/NOPB	LM5035CMH/NOPB	LM5039MH/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Last Time Buy	Active	Last Time Buy	Last Time Buy
Topology	Half-Bridge	Half-Bridge	Half-Bridge	Half-Bridge
Output Type	Transistor Driver	Transistor Driver	Transistor Driver	Transistor Driver
Output Configuration	Positive, Isolation Capable	Positive, Isolation Capable	Positive, Isolation Capable	Positive, Isolation Capable
Voltage Supply Range	13V ~ 105V	13V ~ 105V	13V ~ 105V	13V ~ 105V
Switching Frequency	200kHz, 500kHz	200kHz, 500kHz	200kHz, 500kHz	200kHz, 500kHz
Synchronous Rectifier	Yes	Yes	Yes	Yes
Clock Sync	Yes	Yes	Yes	Yes
Control Features	Frequency Control, Ramp, Soft Start	Frequency Control, Ramp, Soft Start	Frequency Control, Ramp, Soft Start	Frequency Control, Ramp, Soft Start
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)
Package	20-PowerTSSOP	20-PowerTSSOP	20-PowerTSSOP	20-PowerTSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

For applications currently using LM5035MH/NOPB, the LM5035MHX/NOPB is the primary recommended substitute due to its Active product status, ensuring long-term availability and continued manufacturer support. This variant maintains full electrical and mechanical compatibility while providing superior supply chain continuity.

LM5035CMH/NOPB and LM5039MH/NOPB are parametric equivalents suitable for direct substitution in existing designs. Both parts comply with ROHS3 and REACH requirements, matching the environmental and regulatory profile of the original component. Selection between these alternatives should be based on inventory availability and procurement lead times, as all three substitute parts deliver identical functional performance within the specified operating parameters.

All substitute parts are certified to the same compliance standards (ROHS3 Compliant, REACH Unaffected, MSL 1) and maintain the same thermal operating range, ensuring compatibility with existing thermal management and reliability requirements.

Frequently Asked Questions (FAQ)

Q: Can LM5035MHX/NOPB be used as a direct replacement for LM5035MH/NOPB?

A: Yes. LM5035MHX/NOPB is functionally equivalent across all electrical and mechanical parameters. The primary distinction is product status; LM5035MHX/NOPB is Active, while LM5035MH/NOPB is Last Time Buy. No circuit modifications are required for substitution.

Q: What is the difference between LM5035CMH/NOPB and LM5035MH/NOPB?

A: Both parts are parametric equivalents with identical electrical specifications and package configuration. The difference lies in product status (both Last Time Buy) and packaging format. LM5035CMH/NOPB is supplied in Tube packaging, while LM5035MH/NOPB packaging format is specified as Tube. Functional performance is identical.

Q: Is LM5039MH/NOPB compatible with designs using LM5035MH/NOPB?

A: Yes. LM5039MH/NOPB maintains all critical electrical and mechanical parameters required for substitution, including topology, output configuration, voltage range, switching frequency, and control features. The base product number differs (LM5039 vs. LM5035), but functional equivalence is maintained across all specified parameters.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All listed substitute parts are ROHS3 Compliant and REACH Unaffected, matching the compliance profile of LM5035MH/NOPB.

Q: What is the moisture sensitivity level for these parts?

A: All parts, including the main component and substitutes, have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can these parts be used in high-temperature applications?

A: Yes. All parts operate across the temperature range -40°C to 125°C (TJ), supporting both industrial and extended temperature applications.

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