LP8552TLE-E01/NOPB LED Driver IC Equivalent & Substitute Parts

Part Overview

The LP8552TLE-E01/NOPB is an active-status LED Driver IC manufactured by Texas Instruments, classified as a Power Management PMIC. This device functions as a 6-output DC-DC Step-Up (Boost) regulator with integrated switching capability, designed for backlight applications. The part operates across a 2.7V to 22V supply range and delivers 40V output with 450mA per-channel current capacity. It supports multiple dimming control methods including I2C and PWM protocols, with selectable switching frequencies of 156kHz, 312kHz, 625kHz, and 1.25MHz.

Substitute parts are identified when design requirements necessitate alternative packaging formats, different thermal operating ranges, enhanced automotive qualification, or modified electrical specifications while maintaining functional equivalence for LED driver applications.

Substiute Parts

LP8552TLE-E01/NOPB

Texas InstrumentsIn Stock: 1202LP8552TLE-E01/NOPB Datasheet

Current PartRFQ

ISL78171ARZ-T7A

Renesas Electronics CorporationIn Stock: 1249ISL78171ARZ-T7A Datasheet

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ISL97671AIRZ-T

Renesas Electronics CorporationIn Stock: 8100ISL97671AIRZ-T Datasheet

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LT3598EFE#PBF

Analog Devices Inc.In Stock: 2298LT3598EFE#PBF Datasheet

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MP3387LGRT-P

Monolithic Power SystemsIn Stock: 1490MP3387LGRT-P Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP8552TLE-E01/NOPB is determined by the following core parameters:

Primary Functional Requirements:

• 6-output LED driver architecture
• Step-Up (Boost) topology with internal switching
• Output voltage capability of 40V or greater
• I2C and/or PWM dimming control support
• Backlight application suitability

Electrical Compatibility Criteria:

• Supply voltage range overlap with 2.7V–22V input specification
• Per-channel current capacity of 50mA or greater (substitute parts operate at reduced current levels)
• Switching frequency operation within industrial standard ranges (156kHz–2.5MHz)

Physical & Environmental Compatibility:

• Surface mount technology
• Operating temperature range of -30°C or lower minimum
• RoHS3 compliance
• MSL rating of 1 or 3 (168 Hours)

Package Considerations:

• Substitute parts utilize alternative surface-mount packages (20-QFN, 24-TSSOP, 24-TQFN) suitable for different PCB layout requirements
• All substitutes maintain BGA or QFN form factors compatible with automated assembly

The identified substitute parts meet these criteria with documented trade-offs in current capacity, package geometry, and thermal specifications.

Parameter Comparison

Engineering Selection Recommendations

ISL78171ARZ-T7A (Renesas Electronics Corporation)

This substitute is suitable for applications requiring automotive-grade qualification (AEC-Q100) with extended upper operating temperature to 105°C. The part maintains 6-output architecture and 40V output voltage matching the primary specification. Supply voltage range extends to 26.5V maximum. Current capacity reduces to 50mA per channel, requiring design verification for reduced-current backlight applications. The 20-QFN package offers compact footprint alternative to BGA. MSL rating of 1 (Unlimited) matches primary part moisture sensitivity. Product status is Active with ROHS3 compliance confirmed.

ISL97671AIRZ-T (Renesas Electronics Corporation)

This substitute provides PWM-only dimming control with 45V output voltage capability exceeding the 40V primary specification. Supply voltage range extends to 26.5V. Current capacity is 50mA per channel. Operating temperature range matches the primary part at -40°C to 85°C. The 20-QFN package provides compact alternative to BGA. MSL rating is 3 (168 Hours), indicating moisture sensitivity requiring controlled storage. Product status is Active with ROHS3 compliance. High inventory availability (7994 Pcs) supports supply chain continuity.

LT3598EFE#PBF (Analog Devices Inc.)

This substitute operates across the widest supply voltage range (3V to 30V) and highest operating temperature maximum (125°C junction temperature). Output voltage is 44V, exceeding the 40V primary specification. Current capacity is 30mA per channel, the lowest among substitutes. Switching frequency range is 200kHz to 2.5MHz, providing maximum flexibility. Dimming control supports Analog and PWM methods. The 24-TSSOP package offers alternative form factor. MSL rating is 1 (Unlimited). Product status is Active with ROHS3 compliance. Series designation "True Color PWM™" indicates specialized dimming capability.

MP3387LGRT-P (Monolithic Power Systems)

This substitute provides 45mA per-channel current capacity, closest to primary part specifications among alternatives. Supply voltage range is 3V to 25V. Output voltage is not specified in provided data. Switching frequency is fixed at 1.25MHz, matching one primary frequency option. Dimming control supports Analog and PWM methods. The 24-TQFN package offers compact alternative. Operating temperature range is -40°C to 125°C. MSL rating is 1 (Unlimited). Product status is Active with ROHS3 compliance. Inventory availability is 1381 Pcs.

Selection Basis:

• All substitutes maintain Active product status and ROHS3 compliance
• ISL78171ARZ-T7A is recommended for automotive applications requiring AEC-Q100 qualification
• ISL97671AIRZ-T is recommended for high-volume applications with superior inventory availability
• LT3598EFE#PBF is recommended for extended temperature range requirements
• MP3387LGRT-P is recommended for applications requiring highest per-channel current capacity among substitutes

Frequently Asked Questions (FAQ)

Q: Can the LP8552TLE-E01/NOPB be directly replaced with ISL78171ARZ-T7A in existing designs?

A: Direct replacement requires verification of current requirements. The ISL78171ARZ-T7A operates at 50mA per channel versus 450mA for the primary part. If the application requires full 450mA per channel, this substitute is not suitable. The 20-QFN package differs from 25-DSBGA, requiring PCB layout modification. Supply voltage minimum increases from 2.7V to 4.5V, which may affect low-voltage input designs.

Q: What is the primary difference between ISL97671AIRZ-T and ISL78171ARZ-T7A?

A: Both are Renesas 6-output LED drivers in 20-QFN packages with 50mA per-channel current. ISL97671AIRZ-T supports PWM dimming only, while ISL78171ARZ-T7A supports Analog, I2C, and PWM dimming. ISL78171ARZ-T7A includes AEC-Q100 automotive qualification and operates to 105°C maximum temperature. ISL97671AIRZ-T has higher inventory availability (7994 Pcs versus 1221 Pcs).

Q: Is the LT3598EFE#PBF suitable for low-current backlight applications?

A: The LT3598EFE#PBF operates at 30mA per channel, the lowest among provided substitutes. It is suitable for applications requiring reduced current per output channel. The 24-TSSOP package is larger than QFN alternatives. Operating temperature range extends to 125°C junction temperature, supporting high-temperature environments. Switching frequency is adjustable from 200kHz to 2.5MHz, providing design flexibility.

Q: What packaging considerations apply when substituting from 25-DSBGA to 20-QFN?

A: The 25-DSBGA package is a ball grid array with 25 contact points, while 20-QFN is a quad flat no-lead package with 20 leads. QFN packages require different PCB pad layouts, solder reflow profiles, and underfill considerations. The 20-QFN footprint is smaller, potentially reducing PCB area. Both are surface-mount technologies compatible with automated assembly. Thermal management differs; BGA provides bottom-side thermal dissipation while QFN uses exposed pad design.

Q: Can MP3387LGRT-P replace the LP8552TLE-E01/NOPB in high-current applications?

A: The MP3387LGRT-P operates at 45mA per channel, significantly below the 450mA primary specification. This substitute is not suitable for applications requiring full 450mA per-channel current capacity. It is appropriate for reduced-current backlight designs. The 24-TQFN package differs from 25-DSBGA, requiring PCB redesign. Supply voltage range (3V to 25V) is compatible with most primary applications.

Q: What is the significance of MSL rating differences between substitutes?

A: MSL (Moisture Sensitivity Level) rating indicates moisture absorption and reflow soldering requirements. MSL 1 (Unlimited) parts have no moisture absorption restrictions and can be stored indefinitely at room temperature. MSL 3 (168 Hours) parts, such as ISL97671AIRZ-T, must be used within 168 hours of package opening or require baking before reflow. MSL 1 parts (LP8552TLE-E01/NOPB, ISL78171ARZ-T7A, LT3598EFE#PBF, MP3387LGRT-P) are preferred for supply chain flexibility.

Q: Which substitute provides the best thermal performance?

A: LT3598EFE#PBF and MP3387LGRT-P both operate to 125°C maximum junction temperature, the highest among substitutes. ISL78171ARZ-T7A operates to 105°C. ISL97671AIRZ-T operates to 85°C, matching the primary part. Thermal performance depends on package design, die size, and thermal resistance specifications not provided in the input data. The 24-TSSOP package (LT3598EFE#PBF) typically provides lower thermal resistance than QFN packages due to larger exposed pad area.

Q: Are all substitutes compatible with I2C dimming control?

A: No. The primary part LP8552TLE-E01/NOPB supports I2C and PWM dimming. ISL78171ARZ-T7A supports Analog, I2C, and PWM. ISL97671AIRZ-T supports PWM only. LT3598EFE#PBF supports Analog and PWM. MP3387LGRT-P supports Analog and PWM. If I2C dimming control is required, only ISL78171ARZ-T7A maintains this capability among substitutes.

Q: What inventory considerations apply to substitute selection?

A: Current inventory levels are: LP8552TLE-E01/NOPB (1126 Pcs), ISL78171ARZ-T7A (1221 Pcs), ISL97671AIRZ-T (7994 Pcs), LT3598EFE#PBF (2200 Pcs), MP3387LGRT-P (1381 Pcs). ISL97671AIRZ-T has significantly higher availability, supporting high-volume production. All parts are listed as New Original In Stock. Inventory levels are current as of the provided data and subject to change.