LM5035CMH/NOPB Equivalent & Substitute Parts

Part Overview

The LM5035CMH/NOPB is a half-bridge regulator controller IC manufactured by Texas Instruments, designed for positive, isolation-capable step-up/step-down DC-DC conversion applications. This device operates as a transistor driver with integrated control features including frequency control, ramp, and soft start functionality. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this topology and electrical performance.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution for the LM5035CMH/NOPB is determined by strict equivalence across the following critical parameters: output type (transistor driver), function (step-up/step-down), topology (half-bridge), output configuration (positive, isolation capable), supply voltage range (13V ~ 105V), switching frequency options (200kHz, 500kHz), synchronous rectifier capability, clock sync support, and control features (frequency control, ramp, soft start). All substitute parts maintain identical electrical specifications and the same 20-HTSSOP package footprint. Substitution is valid only when all these parameters match exactly. Packaging format (tube versus tape & reel) and product status do not affect electrical interchangeability but may impact procurement and logistics considerations.

Parameter Comparison

Parameter	LM5035CMH/NOPB	LM5035CMHX/NOPB	LM5035MH/NOPB	LM5039MH/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Output Type	Transistor Driver	Transistor Driver	Transistor Driver	Transistor Driver
Function	Step-Up/Step-Down	Step-Up/Step-Down	Step-Up/Step-Down	Step-Up/Step-Down
Topology	Half-Bridge	Half-Bridge	Half-Bridge	Half-Bridge
Output Configuration	Positive, Isolation Capable	Positive, Isolation Capable	Positive, Isolation Capable	Positive, Isolation Capable
Number of Outputs	1	1	1	1
Output Phases	1	1	1	1
Voltage - Supply (Vcc/Vdd)	13V ~ 105V	13V ~ 105V	13V ~ 105V	13V ~ 105V
Frequency - Switching	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)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	20-PowerTSSOP (0.173", 4.40mm Width)	20-PowerTSSOP (0.173", 4.40mm Width)	20-PowerTSSOP (0.173", 4.40mm Width)	20-PowerTSSOP (0.173", 4.40mm Width)
Supplier Device Package	20-HTSSOP	20-HTSSOP	20-HTSSOP	20-HTSSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Packaging Format	Tube	Tape & Reel (TR)	Tube	Tube
Product Status	Last Time Buy	Active	Last Time Buy	Last Time Buy

Engineering Selection Recommendations

LM5035CMHX/NOPB is the primary recommended substitute, offering identical electrical and mechanical specifications with Active product status and tape & reel packaging. This part provides the most favorable long-term availability and supply chain stability for new designs or production continuity.

LM5035MH/NOPB and LM5039MH/NOPB are parametric equivalents with identical electrical performance and 20-HTSSOP package compatibility. Both parts carry Last Time Buy status, indicating limited future availability. These substitutes are suitable for direct replacement in existing designs but should not be selected for new production without confirming long-term supply viability.

All substitute parts maintain ROHS3 compliance, MSL Level 1 (unlimited moisture sensitivity), and REACH Unaffected status, ensuring regulatory and environmental compliance equivalence with the original LM5035CMH/NOPB.

Frequently Asked Questions (FAQ)

Q: Can LM5035CMHX/NOPB replace LM5035CMH/NOPB in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The primary difference is packaging format (tape & reel versus tube) and product status (Active versus Last Time Buy). No circuit modifications are required.

Q: What is the difference between LM5035MH/NOPB and LM5039MH/NOPB?

A: Both parts are parametric equivalents with identical electrical specifications, topology, and package. The base product numbers differ (LM5035 versus LM5039), but all critical parameters for half-bridge DC-DC controller functionality are equivalent.

Q: Does packaging format affect electrical performance?

A: No. Tube and tape & reel packaging formats contain identical die and electrical characteristics. Packaging selection is determined by procurement, handling, and assembly process requirements only.

Q: Are all substitute parts suitable for new product designs?

A: LM5035CMHX/NOPB is recommended for new designs due to Active product status. LM5035MH/NOPB and LM5039MH/NOPB carry Last Time Buy status and should be evaluated for long-term supply availability before selection for new production.

Q: Do substitute parts require PCB layout modifications?

A: No. All substitute parts use the identical 20-PowerTSSOP (20-HTSSOP) package with matching pinout and footprint. Existing PCB designs require no modifications.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All substitute parts are ROHS3 Compliant and REACH Unaffected, maintaining full regulatory equivalence with the original LM5035CMH/NOPB.

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