LM5169PDDAR Equivalent & Substitute Parts

Part Overview

The LM5169PDDAR is an active buck switching regulator IC manufactured by Texas Instruments, designed for step-down voltage conversion applications. This positive adjustable output regulator delivers up to 650mA output current with an input voltage range of 6V to 120V and adjustable output voltage from 1.2V to 120V. The device operates at switching frequencies between 100kHz and 1MHz and includes integrated synchronous rectification. The LM5169PDDAR is packaged in an 8-PowerSOIC form factor with 0.154" width and 3.90mm body dimension. Equivalent and substitute parts are identified for applications requiring alternative sourcing, inventory availability, or specific operational parameter matching within the buck regulator topology category.

Substiute Parts

LM5169PDDAR

Texas InstrumentsIn Stock: 3191LM5169PDDAR Datasheet

Current PartRFQ

RT6210GSP

Richtek USA Inc.In Stock: 4470RT6210GSP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM5169PDDAR is determined by the following critical parameters: buck topology classification, positive adjustable output configuration, single output structure, surface mount 8-pin SOIC package footprint compatibility, and operational overlap within input/output voltage and current specifications.

The RT6210GSP qualifies as a substitute part based on the following matching criteria:

Topology Match: Both devices implement buck (step-down) switching regulator topology with positive adjustable output voltage.

Package Compatibility: Both use 8-pin SOIC packages with 0.154" width and 3.90mm body dimension, enabling direct PCB footprint compatibility.

Output Configuration: Both provide single positive adjustable output with adjustable voltage regulation capability.

Functional Classification: Both are classified as Power Management (PMIC) buck regulators for step-down voltage conversion.

Parameter Overlap: Input voltage range overlap exists between 6V and 80V. Output voltage range overlap exists between 1.2V and 72V. Output current specification of RT6210GSP (500mA) is lower than LM5169PDDAR (650mA), requiring circuit-level current capacity verification.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (LM5169PDDAR): Use the LM5169PDDAR for applications requiring input voltages up to 120V, output voltages up to 120V, output currents up to 650mA, or operating junction temperatures up to 150°C. This device is the specified component for designs with these parameter requirements.

Substitute Selection (RT6210GSP): The RT6210GSP is suitable for applications where input voltage does not exceed 80V, output voltage does not exceed 72V, and output current does not exceed 500mA. The RT6210GSP is ROHS3 compliant and REACH unaffected, providing alternative compliance documentation. The RT6210GSP operates at a fixed switching frequency of 350kHz, which differs from the LM5169PDDAR's 100kHz to 1MHz range.

Compliance Considerations: The LM5169PDDAR RoHS status is not applicable. The RT6210GSP is ROHS3 compliant and REACH unaffected. Both devices carry EAR99 ECCN classification and 8542.39.0001 HTSUS code.

Inventory Availability: LM5169PDDAR: 3082 pieces in stock. RT6210GSP: 4365 pieces in stock.

Frequently Asked Questions (FAQ)

Q: Can the RT6210GSP directly replace the LM5169PDDAR in all applications?

A: No. The RT6210GSP has lower maximum input voltage (80V vs. 120V), lower maximum output voltage (72V vs. 120V), lower output current capacity (500mA vs. 650mA), and lower maximum operating temperature (85°C vs. 150°C). Substitution is valid only when application parameters remain within RT6210GSP specifications.

Q: Are the package footprints identical between these two parts?

A: Both devices use 8-pin SOIC packages with 0.154" width and 3.90mm body dimension. The RT6210GSP includes an exposed pad feature. PCB layout compatibility exists for footprint placement, but thermal pad design differences may require layout verification.

Q: What is the switching frequency difference impact?

A: The LM5169PDDAR operates across 100kHz to 1MHz, while the RT6210GSP operates at a fixed 350kHz. This affects output filter design, EMI characteristics, and efficiency curves. Applications designed for the LM5169PDDAR's frequency range may require filter recalculation for the RT6210GSP.

Q: How does the output current difference affect circuit design?

A: The RT6210GSP maximum output current is 500mA compared to the LM5169PDDAR's 650mA. Applications requiring output currents between 500mA and 650mA cannot use the RT6210GSP as a substitute without redesigning the load circuit or power distribution.

Q: What are the temperature operating range implications?

A: The LM5169PDDAR operates to 150°C junction temperature, while the RT6210GSP operates to 85°C ambient temperature. Applications in high-temperature environments or with high power dissipation may exceed the RT6210GSP's thermal limits.

Q: Are there compliance or certification differences?

A: The RT6210GSP is ROHS3 compliant and REACH unaffected. The LM5169PDDAR RoHS status is not applicable. Both carry identical ECCN and HTSUS classifications. Compliance requirements for the target application determine which device is acceptable.