LM3524DMX Equivalent & Substitute Parts

Part Overview

The LM3524DMX is a Buck, Boost Regulator controller IC from Texas Instruments designed for positive or negative output step-up and step-down DC-DC conversion applications. This device functions as a transistor driver with integrated current limit, enable, and frequency control features, operating across a supply voltage range of 8V to 40V with a maximum duty cycle of 49%.

The LM3524DMX is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this controller.

Substiute Parts

LM3524DMX

Texas InstrumentsIn Stock: 4344LM3524DMX Datasheet

Current PartRFQ

LM3524DMX/NOPB

Texas InstrumentsIn Stock: 2939LM3524DMX/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM3524DMX is determined by strict equivalence across the following critical parameters:

• Output Type: Transistor Driver
• Function: Step-Up, Step-Down
• Output Configuration: Positive or Negative
• Topology: Buck, Boost
• Number of Outputs: 1
• Output Phases: 1
• Voltage - Supply (Vcc/Vdd): 8V ~ 40V
• Duty Cycle (Max): 49%
• Control Features: Current Limit, Enable, Frequency Control
• Operating Temperature: 0°C ~ 125°C (TJ)
• Package / Case: 16-SOIC (0.154", 3.90mm Width)

The LM3524DMX/NOPB is a parametric equivalent that maintains identical electrical and mechanical specifications while offering improved product status and compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The LM3524DMX/NOPB is the direct substitute for the LM3524DMX. Both parts are electrically and mechanically identical across all functional parameters. The primary distinction is product status and compliance posture.

The LM3524DMX carries obsolete status with RoHS non-compliant classification. The LM3524DMX/NOPB maintains active product status and achieves ROHS3 compliance, making it the preferred selection for new designs and ongoing production requirements where regulatory compliance and supply chain continuity are considerations.

Both parts share identical packaging (16-SOIC), operating temperature range (0°C ~ 125°C), and supply voltage specifications (8V ~ 40V), ensuring direct functional interchangeability in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Are the LM3524DMX and LM3524DMX/NOPB electrically identical?

A: Yes. Both parts are parametrically equivalent across all electrical specifications including output type, function, topology, supply voltage range, duty cycle, control features, and operating temperature.

Q: What is the difference between these two part numbers?

A: The primary differences are product status and RoHS compliance. The LM3524DMX is obsolete and RoHS non-compliant, while the LM3524DMX/NOPB is active and ROHS3 compliant. Electrical and mechanical specifications are identical.

Q: Can I use LM3524DMX/NOPB as a direct replacement for LM3524DMX?

A: Yes. The LM3524DMX/NOPB is a direct substitute. Both parts use the 16-SOIC package and share identical pinout, electrical characteristics, and functional specifications.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix indicates the part is supplied without plumbum (lead-free), reflecting RoHS3 compliance and modern manufacturing standards.

Q: Are there any circuit design changes required when switching from LM3524DMX to LM3524DMX/NOPB?

A: No circuit design changes are required. The parts are functionally equivalent and can be used interchangeably in existing designs without modification.

Q: What is the operating temperature range for both parts?

A: Both the LM3524DMX and LM3524DMX/NOPB operate across a junction temperature range of 0°C to 125°C (TJ).

Q: What supply voltage range do these controllers support?

A: Both parts support a supply voltage (Vcc/Vdd) range of 8V to 40V, making them suitable for a wide range of DC-DC conversion applications.