LM2590HVT-ADJ Buck Switching Regulator IC

Part Overview

The LM2590HVT-ADJ is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with positive adjustable output. This device delivers 1A output current across an input voltage range of 4.5V to 60V, with adjustable output voltage from 1.2V to 57V. The part operates at a fixed switching frequency of 150kHz and is housed in a TO-220-7 package with formed leads for through-hole mounting.

The LM2590HVT-ADJ carries an Obsolete product status. Finding equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with current manufacturing support and updated compliance certifications.

Substiute Parts

LM2590HVT-ADJ

Texas InstrumentsIn Stock: 1993LM2590HVT-ADJ Datasheet

Current PartRFQ

LM2590HVT-ADJ/NOPB

Texas InstrumentsIn Stock: 1129LM2590HVT-ADJ/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2590HVT-ADJ is determined by strict equivalence across the following critical parameters:

Topology and Function: Buck (step-down) topology with positive adjustable output configuration Electrical Performance: Input voltage range 4.5V to 60V, adjustable output 1.2V to 57V, 1A output current, 150kHz switching frequency Package and Mounting: TO-220-7 through-hole package with formed leads Thermal Rating: Operating temperature range -40°C to 125°C (TJ)

The LM2590HVT-ADJ/NOPB is a direct substitute manufactured by Texas Instruments. This part maintains identical electrical specifications, package configuration, and thermal characteristics while differing in product status (Active vs. Obsolete) and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LM2590HVT-ADJ/NOPB is the direct equivalent substitute for the obsolete LM2590HVT-ADJ. Both parts share identical electrical specifications, thermal ratings, and package configuration, ensuring pin-for-pin and functional compatibility.

The primary distinction is product status: the LM2590HVT-ADJ/NOPB carries Active status with current manufacturing support from Texas Instruments. Additionally, the LM2590HVT-ADJ/NOPB meets ROHS3 compliance requirements, whereas the original part is RoHS non-compliant. This compliance upgrade aligns with current regulatory standards for electronic components in regulated markets.

Selection of the LM2590HVT-ADJ/NOPB is appropriate for new designs, redesigns, and production continuity where the obsolete part is no longer available. The tube packaging of the substitute part is standard for active production inventory and does not affect electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Are the LM2590HVT-ADJ and LM2590HVT-ADJ/NOPB electrically identical?

A: Yes. Both parts deliver identical electrical performance across all specified parameters: input voltage range (4.5V to 60V), adjustable output voltage (1.2V to 57V), output current (1A), switching frequency (150kHz), and operating temperature range (-40°C to 125°C). They are functionally interchangeable.

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

A: The "/NOPB" suffix denotes "No Plumbum" (lead-free) packaging, indicating compliance with RoHS3 lead-free requirements. This is a manufacturing and compliance designation that does not affect electrical performance or pin compatibility.

Q: Can I use the LM2590HVT-ADJ/NOPB as a direct replacement in existing designs?

A: Yes. The LM2590HVT-ADJ/NOPB maintains identical pin configuration, package dimensions (TO-220-7), and electrical specifications. No circuit modifications are required for substitution.

Q: Why is the original LM2590HVT-ADJ marked as Obsolete?

A: Obsolete status indicates that Texas Instruments has discontinued manufacturing and support for this specific part number. The LM2590HVT-ADJ/NOPB represents the current active equivalent with ongoing manufacturing support.

Q: Does the packaging difference (Tube vs. unspecified) affect performance?

A: No. Packaging format (Tube) is a logistics and handling specification only. It does not affect electrical performance, thermal characteristics, or mechanical compatibility in the application circuit.

Q: Are there any compliance differences between the two parts?

A: Yes. The LM2590HVT-ADJ/NOPB is ROHS3 compliant and lead-free, while the original LM2590HVT-ADJ is RoHS non-compliant. For applications subject to RoHS regulations, the LM2590HVT-ADJ/NOPB is the required choice.