LM5033SD Equivalent & Substitute Parts

Part Overview

The LM5033SD is a Full-Bridge, Half-Bridge, and Push-Pull Regulator controller IC manufactured by Texas Instruments, designed for positive output Step-Up/Step-Down DC-DC conversion applications. This device generates PWM signals to control power conversion topologies across a wide input voltage range of 15V to 90V.

The LM5033SD is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications currently utilizing this controller.

Key Parameters

Parameter	Value
Output Type	PWM Signal
Function	Step-Up/Step-Down
Output Configuration	Positive
Topology	Full-Bridge, Half-Bridge, Push-Pull
Number of Outputs	2
Output Phases	1
Voltage - Supply (Vcc/Vdd)	15V ~ 90V
Frequency - Switching	200kHz, 600kHz
Synchronous Rectifier	Yes
Clock Sync	Yes
Control Features	Frequency Control, Soft Start
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount
Package / Case	10-WDFN Exposed Pad
Supplier Device Package	10-WSON (4x4)

Substitute Part Grouping Explanation

Substitution of the LM5033SD is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

Output Type: PWM Signal
Function: Step-Up/Step-Down
Output Configuration: Positive
Topology: Full-Bridge, Half-Bridge, Push-Pull
Number of Outputs: 2
Output Phases: 1
Voltage - Supply (Vcc/Vdd): 15V ~ 90V
Frequency - Switching: 200kHz, 600kHz
Synchronous Rectifier: Yes
Clock Sync: Yes
Control Features: Frequency Control, Soft Start
Operating Temperature: -40°C ~ 125°C (TJ)

Mechanical Parameters:

Mounting Type: Surface Mount
Package / Case: 10-WDFN Exposed Pad
Supplier Device Package: 10-WSON (4x4)

The LM5033SDX/NOPB is identified as a parametric equivalent substitute. This part maintains identical electrical specifications and mechanical packaging, ensuring direct functional compatibility in existing circuit designs.

Parameter Comparison

Parameter	LM5033SD	LM5033SDX/NOPB	Match Status
Manufacturer	Texas Instruments	Texas Instruments	Identical
Output Type	PWM Signal	PWM Signal	Identical
Function	Step-Up/Step-Down	Step-Up/Step-Down	Identical
Output Configuration	Positive	Positive	Identical
Topology	Full-Bridge, Half-Bridge, Push-Pull	Full-Bridge, Half-Bridge, Push-Pull	Identical
Number of Outputs	2	2	Identical
Output Phases	1	1	Identical
Voltage - Supply (Vcc/Vdd)	15V ~ 90V	15V ~ 90V	Identical
Frequency - Switching	200kHz, 600kHz	200kHz, 600kHz	Identical
Synchronous Rectifier	Yes	Yes	Identical
Clock Sync	Yes	Yes	Identical
Control Features	Frequency Control, Soft Start	Frequency Control, Soft Start	Identical
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	10-WDFN Exposed Pad	10-WDFN Exposed Pad	Identical
Supplier Device Package	10-WSON (4x4)	10-WSON (4x4)	Identical
Product Status	Obsolete	Active	Different
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Different

Engineering Selection Recommendations

The LM5033SDX/NOPB serves as the direct substitute for the obsolete LM5033SD. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications across all functional parameters.

Product Status Consideration: The LM5033SD is classified as obsolete, while the LM5033SDX/NOPB is active. Selection of the LM5033SDX/NOPB ensures access to current manufacturing, ongoing supply availability, and support from the manufacturer.

Compliance Consideration: The LM5033SDX/NOPB carries ROHS3 compliance certification, whereas the LM5033SD is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the LM5033SDX/NOPB is the appropriate selection. Both parts maintain REACH Unaffected status and EAR99 export classification.

Packaging and Inventory: The LM5033SDX/NOPB is supplied in Tape & Reel (TR) packaging with 9100 units currently in stock, providing superior supply chain continuity compared to the obsolete LM5033SD variant.

Frequently Asked Questions (FAQ)

Q: Can the LM5033SDX/NOPB be used as a direct replacement for the LM5033SD in existing designs?

A: Yes. The LM5033SDX/NOPB is electrically and mechanically equivalent to the LM5033SD. All functional parameters, including output type, topology, voltage range, switching frequency, control features, and package specifications are identical. No circuit modifications are required.

Q: What is the difference between the LM5033SD and LM5033SDX/NOPB?

A: The primary differences are product status and compliance certification. The LM5033SD is obsolete and RoHS non-compliant. The LM5033SDX/NOPB is active and ROHS3 compliant. Electrically and mechanically, both parts are identical.

Q: Are there any package compatibility concerns when substituting the LM5033SDX/NOPB for the LM5033SD?

A: No. Both parts use the identical 10-WSON (4x4) package with 10-WDFN Exposed Pad configuration. PCB footprints, pin assignments, and mounting procedures are identical.

Q: Why should I select the LM5033SDX/NOPB over the LM5033SD?

A: The LM5033SDX/NOPB is the recommended selection because it is an active product with current manufacturing support, superior inventory availability (9100 units in stock), and ROHS3 compliance certification. The LM5033SD is obsolete and may face supply constraints.

Q: Does the LM5033SDX/NOPB support the same switching frequencies as the LM5033SD?

A: Yes. Both parts support identical switching frequencies of 200kHz and 600kHz, with equivalent frequency control and soft start features.

Q: Are the thermal operating ranges identical between these parts?

A: Yes. Both the LM5033SD and LM5033SDX/NOPB operate across the identical temperature range of -40°C to 125°C (TJ).

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message