LM46000PWPR Equivalent & Substitute Parts

Part Overview

The LM46000PWPR is an active buck switching regulator IC from Texas Instruments, part of the SIMPLE SWITCHER® series. This positive adjustable step-down converter delivers 500mA output current with an adjustable output voltage range of 1V to 28V and input voltage range of 4.6V to 60V. The device operates at switching frequencies between 200kHz and 2.2MHz and includes a synchronous rectifier for improved efficiency. Packaged in a 16-PowerTSSOP surface mount configuration, the LM46000PWPR is designed for applications requiring compact, efficient power conversion. Finding equivalent or substitute parts may be necessary due to inventory constraints, lead time considerations, or specific application requirements that align with alternative component specifications.

Substiute Parts

LM46000PWPR

Texas InstrumentsIn Stock: 3392LM46000PWPR Datasheet

Current PartRFQ

RT6204GSP

Richtek USA Inc.In Stock: 1691RT6204GSP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM46000PWPR is determined by alignment of core electrical and mechanical parameters. The primary criteria for equivalent parts include:

Electrical Compatibility:

• Buck topology with positive adjustable output configuration
• Output current rating of 500mA
• Input voltage range overlap with 4.6V to 60V specification
• Output voltage adjustability within or exceeding 1V to 28V range
• Synchronous rectifier implementation
• Operating temperature range compatibility

Mechanical Compatibility:

• Surface mount packaging
• Pin count and footprint considerations
• Thermal performance characteristics

Compliance & Status:

• Active product status
• RoHS3 compliance
• REACH unaffected status

The RT6204GSP qualifies as a substitute based on matching topology, output current, synchronous rectification, and compliance certifications, with noted differences in package configuration and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

Both the LM46000PWPR and RT6204GSP are active, ROHS3-compliant buck regulators with 500mA output current and synchronous rectification. Selection between these parts depends on specific application constraints:

LM46000PWPR is suitable for applications requiring the full specified input voltage range starting at 4.6V, extended output voltage adjustability down to 1V, higher maximum junction temperature operation to 125°C, and flexible switching frequency control across 200kHz to 2.2MHz.

RT6204GSP is suitable for applications with minimum input voltage of 5.2V or higher, output voltage requirements between 0.8V and 50V, operating temperature limits to 85°C, and fixed 350kHz switching frequency. The 8-SOIC package provides a smaller footprint compared to the 16-PowerTSSOP, which may be advantageous for space-constrained designs.

Both parts maintain REACH unaffected and EAR99 ECCN classifications.

Frequently Asked Questions (FAQ)

Q: Can the RT6204GSP directly replace the LM46000PWPR in all applications?

A: Direct replacement depends on application-specific requirements. The RT6204GSP has a higher minimum input voltage (5.2V vs. 4.6V), lower maximum output voltage (50V vs. 28V is not a constraint, but lower minimum output voltage of 0.8V vs. 1V is not a limitation), and lower maximum operating temperature (85°C vs. 125°C). Applications operating below 5.2V input or requiring junction temperatures above 85°C require the LM46000PWPR.

Q: What are the package differences between these parts?

A: The LM46000PWPR uses a 16-PowerTSSOP package (0.173" width, 4.40mm), while the RT6204GSP uses an 8-SOIC package with exposed pad (0.154" width, 3.90mm). The RT6204GSP occupies less board space but has different pin assignments and thermal characteristics.

Q: Are both parts RoHS compliant?

A: Yes, both the LM46000PWPR and RT6204GSP are ROHS3 compliant and REACH unaffected.

Q: What is the switching frequency difference impact?

A: The LM46000PWPR operates across 200kHz to 2.2MHz with programmable frequency control, while the RT6204GSP operates at a fixed 350kHz. Applications requiring frequency adjustment or operation outside the 350kHz point must use the LM46000PWPR.

Q: How do the output voltage ranges compare?

A: The LM46000PWPR provides adjustable output from 1V to 28V. The RT6204GSP provides adjustable output from 0.8V to 50V. For applications requiring output voltages below 0.8V or between 28V and 50V, verify the specific part's capability.