LM2593HVT-ADJ Buck Switching Regulator IC

Part Overview

The LM2593HVT-ADJ is a buck switching regulator IC from Texas Instruments, part of the SIMPLE SWITCHER® series. This positive adjustable step-down regulator delivers 2A output current with an input voltage range of 4.5V to 60V and adjustable output voltage from 1.2V to 57V. The device is packaged in TO-220-7 formed leads for through-hole mounting applications.

The LM2593HVT-ADJ carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support legacy system maintenance and repairs.

Substiute Parts

LM2593HVT-ADJ

Texas InstrumentsIn Stock: 2405LM2593HVT-ADJ Datasheet

Current PartRFQ

LM2593HVT-ADJ/NOPB

National SemiconductorIn Stock: 2019LM2593HVT-ADJ/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2593HVT-ADJ is determined by strict equivalence across the following critical parameters:

• Input voltage range: 4.5V to 60V
• Output voltage adjustability: 1.2V to 57V
• Output current capacity: 2A
• Switching frequency: 150kHz
• Package type: TO-220-7 formed leads
• Topology: Buck (step-down)
• Output configuration: Positive adjustable
• Number of outputs: Single output
• Operating temperature range: -40°C to 125°C

The LM2593HVT-ADJ/NOPB qualifies as a direct substitute based on identical electrical specifications and mechanical compatibility across all parameters listed above.

Parameter Comparison

Engineering Selection Recommendations

The LM2593HVT-ADJ/NOPB is a direct functional equivalent to the LM2593HVT-ADJ. The primary distinction is product status: the original part is obsolete while the substitute is active. The "/NOPB" suffix indicates lead-free plating, which aligns with modern manufacturing standards.

Selection between these parts should be based on availability and supply chain requirements. The LM2593HVT-ADJ/NOPB is the preferred choice for new designs and ongoing production due to its active status and current availability. For legacy system repairs requiring exact historical matching, the original LM2593HVT-ADJ may be sourced from remaining inventory if compliance requirements permit.

Both parts share identical electrical performance, thermal characteristics, and mechanical compatibility. No circuit redesign or board layout modification is required when substituting between these parts.

Frequently Asked Questions (FAQ)

Q: Can the LM2593HVT-ADJ/NOPB be used as a direct replacement for the LM2593HVT-ADJ?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. They share the same input/output voltage ranges, current rating, switching frequency, package type, and thermal operating range. No circuit modifications are necessary.

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

A: The "/NOPB" designation indicates lead-free plating on the component leads, meeting modern environmental and manufacturing standards.

Q: Are there any compliance differences between these parts?

A: Both parts carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. The original LM2593HVT-ADJ is RoHS non-compliant, while compliance status for the substitute is not specified in the provided data.

Q: What is the significance of the obsolete status?

A: Obsolete status indicates the LM2593HVT-ADJ is no longer manufactured or supported by Texas Instruments. The LM2593HVT-ADJ/NOPB maintains active production status, ensuring long-term availability and supply chain continuity.

Q: Are the TO-220-7 packages mechanically identical?

A: Yes. Both parts use TO-220-7 formed leads for through-hole mounting. PCB footprints, lead spacing, and mounting hole requirements are identical.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. No PCB layout changes, circuit modifications, or firmware updates are required when substituting between these parts. They are pin-compatible and functionally equivalent.