LP8552TLE-E00/NOPB LED Driver IC Equivalent & Substitute Parts

Part Overview

The LP8552TLE-E00/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 up to 450mA per channel at 40V output, with selectable switching frequencies and dual dimming control via I2C and PWM interfaces.

Equivalent and substitute parts are identified when they maintain functional compatibility across critical electrical parameters including topology, output count, voltage specifications, current capacity, and control interface capabilities. Substitution becomes necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit operation within the broader parameter ranges of alternative devices.

Substiute Parts

LP8552TLE-E00/NOPB

Texas InstrumentsIn Stock: 1054LP8552TLE-E00/NOPB Datasheet

Current PartRFQ

LT3598IUF#PBF

Analog Devices Inc.In Stock: 1482LT3598IUF#PBF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the LP8552TLE-E00/NOPB is determined by the following critical parameters:

Functional Requirements:

• Topology: Step-Up (Boost) DC-DC regulation
• Output Configuration: 6 independent outputs
• Internal Switching: Integrated switch required
• Control Interface: PWM dimming capability

Electrical Compatibility Criteria:

• Supply voltage range must encompass or overlap the 2.7V to 22V specification
• Output voltage capability must meet or exceed 40V
• Per-channel current capacity must support 450mA operation
• Switching frequency range must include selectable options

Physical & Environmental Compatibility:

• Surface mount technology
• Operating temperature range: -30°C to 85°C minimum
• RoHS3 compliance required
• MSL rating of 1 or equivalent

The LT3598IUF#PBF from Analog Devices Inc. qualifies as a substitute based on matching topology, 6-output configuration, internal switching architecture, and PWM dimming capability. Differences in supply voltage range (3V to 30V), output voltage (44V), per-channel current (30mA), and package format (24-QFN vs. 25-DSBGA) establish distinct operational boundaries and application suitability.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (LP8552TLE-E00/NOPB): Select the LP8552TLE-E00/NOPB when application requirements specify 450mA per-channel current delivery, I2C dimming control interface, or operation within the 2.7V to 22V supply range. This device maintains active product status with ROHS3 compliance and unlimited moisture sensitivity rating, supporting long-term design continuity.

Substitute Part Selection (LT3598IUF#PBF): The LT3598IUF#PBF serves as a functional substitute when per-channel current requirements do not exceed 30mA, when analog or PWM-only dimming control is acceptable (I2C interface not required), or when extended supply voltage range (up to 30V) or higher output voltage (44V) provides design advantages. This device maintains active status with ROHS3 compliance and equivalent moisture sensitivity rating.

Substitution Constraints:

• The LT3598IUF#PBF cannot replace the LP8552TLE-E00/NOPB in applications requiring 450mA per-channel current due to 30mA maximum per-channel specification
• I2C dimming control availability differs; verify control interface compatibility before substitution
• Package format differs (25-DSBGA vs. 24-QFN); PCB layout and thermal management characteristics require re-evaluation
• Operating temperature range differs; verify junction temperature requirements for target application

Both devices maintain active product status and full RoHS3 compliance, supporting regulatory and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the LT3598IUF#PBF directly replace the LP8552TLE-E00/NOPB in existing designs?

A: Direct replacement is not possible without design modification. The LT3598IUF#PBF delivers maximum 30mA per channel versus 450mA for the LP8552TLE-E00/NOPB. Applications requiring the full 450mA per-channel current cannot use the LT3598IUF#PBF. Additionally, the control interface differs (Analog/PWM vs. I2C/PWM), and package format changes from 25-DSBGA to 24-QFN require PCB redesign.

Q: What are the key electrical differences between these two parts?

A: The LP8552TLE-E00/NOPB operates with 2.7V to 22V supply input and delivers 40V output at 450mA per channel. The LT3598IUF#PBF operates with 3V to 30V supply input, delivers 44V output, but is limited to 30mA per channel. The LP8552TLE-E00/NOPB supports I2C and PWM dimming, while the LT3598IUF#PBF supports Analog and PWM dimming only.

Q: Are both parts suitable for the same backlight applications?

A: Both parts are classified as LED Driver ICs with Step-Up (Boost) topology and 6-output configuration. However, application suitability depends on current requirements. The LP8552TLE-E00/NOPB supports high-current backlight applications (450mA per channel), while the LT3598IUF#PBF is limited to lower-current applications (30mA per channel). Verify your specific current and dimming control requirements before selection.

Q: What packaging considerations apply when substituting between these parts?

A: The LP8552TLE-E00/NOPB uses 25-DSBGA (25-pin Wafer-Level Ball Grid Array), while the LT3598IUF#PBF uses 24-QFN (4x4mm Quad Flat No-Lead) with exposed pad. These packages have different footprints, thermal characteristics, and assembly requirements. PCB layout, solder reflow profiles, and thermal management strategies require re-evaluation for any substitution.

Q: Do both parts meet the same compliance and reliability standards?

A: Yes. Both the LP8552TLE-E00/NOPB and LT3598IUF#PBF are ROHS3 compliant and carry MSL rating 1 (Unlimited moisture sensitivity). Both maintain active product status. However, operating temperature ranges differ: LP8552TLE-E00/NOPB operates -30°C to 85°C (TA), while LT3598IUF#PBF operates -40°C to 125°C (TJ). Verify your application's temperature requirements.

Q: Which part should I select for new designs?

A: For new designs requiring 450mA per-channel current and I2C dimming control, select the LP8552TLE-E00/NOPB. For applications with lower current requirements (≤30mA per channel) and where Analog or PWM-only dimming is acceptable, the LT3598IUF#PBF offers extended supply voltage range and higher output voltage capability. Both parts maintain active status and full compliance support.