LP8755KME/NOPB Equivalent & Substitute Parts

Part Overview

The LP8755KME/NOPB is a buck switching regulator IC from Texas Instruments designed for multi-output power management applications. It delivers positive programmable output with 6 independent outputs and 15A per-output current capability. The device operates from 2.5V to 5V input and supports output voltages from 0.6V to 1.67V with a 4MHz switching frequency and integrated synchronous rectification.

This part is classified as obsolete. Locating equivalent or substitute components becomes necessary when original inventory is depleted or when design flexibility is required for new production runs. The substitute identified maintains functional compatibility while offering active product status and improved availability.

Substiute Parts

LP8755KME/NOPB

Texas InstrumentsIn Stock: 1149LP8755KME/NOPB Datasheet

Current PartRFQ

LP875484YFQR

Texas InstrumentsIn Stock: 2001LP875484YFQR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP8755KME/NOPB is determined by the following critical parameters:

• Input voltage range compatibility (2.5V to 5V minimum requirement)
• Output voltage programmability (0.6V to 1.67V range)
• Number of outputs (6 outputs required)
• Package compatibility (49-WFBGA, DSBGA form factor)
• Synchronous rectification capability
• Operating temperature range (-40°C to 85°C)
• Regulatory compliance (ROHS3, REACH Unaffected)

The LP875484YFQR qualifies as a manufacturer-recommended substitute. While it reduces per-output current from 15A to 10A and switching frequency from 4MHz to 3MHz, it maintains all critical functional parameters: identical input/output voltage ranges, 6-output configuration, same package type, synchronous rectification, temperature range, and compliance certifications. The reduced current and frequency specifications represent a design trade-off suitable for applications with lower power requirements.

Parameter Comparison

Engineering Selection Recommendations

The LP875484YFQR is designated as the manufacturer-recommended substitute for the obsolete LP8755KME/NOPB. Both devices maintain identical regulatory compliance (ROHS3 Compliant, REACH Unaffected) and share the same moisture sensitivity level classification.

Selection between these parts depends on application current requirements. The LP8755KME/NOPB supports 15A per output, while the LP875484YFQR supports 10A per output. Applications requiring the full 15A per-output capability cannot use the substitute without circuit redesign. Applications operating at or below 10A per output can transition directly to the LP875484YFQR, which offers the advantage of active product status and established supply chain availability.

The switching frequency difference (4MHz versus 3MHz) affects output filter design and EMI characteristics but does not prevent functional substitution for applications designed within the LP875484YFQR specifications.

Frequently Asked Questions (FAQ)

Q: Can the LP875484YFQR directly replace the LP8755KME/NOPB in all applications?

A: Direct replacement is possible only in applications where per-output current does not exceed 10A. The LP875484YFQR is rated for 10A maximum output current compared to the LP8755KME/NOPB's 15A rating. Applications requiring higher current must retain the original part or implement circuit modifications.

Q: Are the packages physically identical?

A: Both devices use the 49-WFBGA, DSBGA package type with identical pinout and footprint compatibility. PCB layout modifications are not required for package substitution.

Q: What is the impact of the 1MHz switching frequency reduction?

A: The LP875484YFQR operates at 3MHz versus the LP8755KME/NOPB's 4MHz. This affects output filter component selection and EMI performance. Applications designed for 4MHz operation may require filter recalculation, but the lower frequency generally reduces EMI emissions and component stress.

Q: Are compliance certifications identical?

A: Both parts carry ROHS3 compliance and REACH Unaffected status. Moisture sensitivity level (MSL 1, Unlimited) is identical. No compliance-related design changes are required.

Q: Why is the LP8755KME/NOPB classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The LP875484YFQR maintains active product status with ongoing manufacturing support and supply availability.

Q: Can output voltage programming be configured identically?

A: Both devices support programmable output from 0.6V to 1.67V with identical configuration methods. Output voltage settings transfer directly between parts.