MP4603ES-LF LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP4603ES-LF is an active LED Driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This device functions as a 1-output DC DC regulator with dual topology support (Step-Down Buck and Step-Up Boost), featuring PWM and analog dimming capabilities. The part operates with a 2.5A internal switch and is housed in a 16-SOIC package. The MP4603ES-LF is ROHS3 compliant and maintains active product status. Equivalent and substitute parts are identified when design requirements necessitate alternative packaging, thermal performance, supply voltage ranges, or output current specifications while maintaining core LED driver functionality.

Substiute Parts

MP4603ES-LF

Monolithic Power Systems Inc.In Stock: 734MP4603ES-LF Datasheet

Current PartRFQ

A6213KLJTR-T

Allegro MicroSystemsIn Stock: 45786A6213KLJTR-T Datasheet

MFR RecommendedRFQ

AP3602AKTR-G1

Diodes IncorporatedIn Stock: 1415AP3602AKTR-G1 Datasheet

MFR RecommendedRFQ

LM3508TL/NOPB

Texas InstrumentsIn Stock: 1891LM3508TL/NOPB Datasheet

MFR RecommendedRFQ

LT3518EFE#TRPBF

Analog Devices Inc.In Stock: 4046LT3518EFE#TRPBF Datasheet

MFR RecommendedRFQ

TPS92662QPHPRQ1

Texas InstrumentsIn Stock: 1446TPS92662QPHPRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MP4603ES-LF are identified based on the following core substitution criteria:

Primary Substitution Parameters:

• DC DC Regulator topology (Step-Down Buck, Step-Up Boost, or single topology variants)
• LED driver functionality with PWM and/or analog dimming support
• Single output configuration
• Supply voltage compatibility within or overlapping the 4.5V to 80V range
• Output current capability at or above 2.5A (or scaled for specific applications)
• Surface mount packaging suitable for LED driver applications
• Active product status and ROHS3 compliance

Substitution Logic: Substitute parts are grouped into two categories based on topology alignment and current handling:

1. Full-Feature Substitutes (Dual Topology, High Current): Parts maintaining both Buck and Boost topology with comparable current ratings (2.3A or higher) and extended supply voltage ranges. These provide direct functional equivalence with potential package variations.

2. Application-Specific Substitutes (Single Topology, Specialized): Parts with single topology (Buck or Boost) optimized for specific LED driver applications (backlight, camera flash) with reduced current requirements or narrower supply voltage ranges. These are suitable when application constraints permit topology specialization.

Parameter Comparison

Engineering Selection Recommendations

LT3518EFE#TRPBF (Analog Devices Inc.) Direct functional equivalent with dual Buck/Boost topology and comparable 2.3A switch current. Supply voltage range (3V to 30V) is narrower than the MP4603ES-LF but covers standard LED driver applications. Supports both analog and PWM dimming. Operating temperature extends to 125°C (TJ). Package is 16-TSSOP-EP with exposed pad, offering improved thermal performance over 16-SOIC. ROHS3 compliant with MSL 1 rating. Suitable for applications requiring extended temperature range and thermal management.

A6213KLJTR-T (Allegro MicroSystems) Single-topology Buck regulator with 3A output current, exceeding the MP4603ES-LF by 0.5A. Supply voltage range (6V to 48V) is narrower but adequate for mid-range LED driver applications. PWM dimming only (no analog dimming). Automotive-grade with AEC-Q100 qualification. Operating temperature range -40°C to 125°C. Package is 8-SOIC-EP. ROHS3 compliant. Suitable for automotive LED applications where Buck topology and higher current capacity are required.

AP3602AKTR-G1 (Diodes Incorporated) Single-topology Boost regulator optimized for low-power LED applications (100mA output). Supply voltage range (2.7V to 5V) is significantly narrower, limiting use to low-voltage input scenarios. Fixed output voltage 4.8V to 5.2V. Package is compact SOT-23-6. Suitable for backlight and camera flash applications where low current and compact form factor are priorities.

LM3508TL/NOPB (Texas Instruments) Single-topology Boost regulator for ultra-low-power LED applications (30mA output). Supply voltage range (2.7V to 5.5V) is narrow. Fixed output voltage 17.5V. Package is 9-DSBGA. MSL 1 rating provides superior moisture resistance. Suitable for backlight applications with minimal current requirements and compact packaging needs.

TPS92662QPHPRQ1 (Texas Instruments) Multi-output LED driver (12 outputs) with PWM dimming. Supply voltage range (4.5V to 60V) overlaps with MP4603ES-LF. Automotive-grade with AEC-Q100 qualification. Operating temperature -40°C to 125°C. Package is 48-HTQFP (7x7), significantly larger than 16-SOIC. Suitable for multi-channel LED driver applications requiring automotive qualification and higher output count.

Frequently Asked Questions (FAQ)

Q: Can the LT3518EFE#TRPBF directly replace the MP4603ES-LF in all applications? A: The LT3518EFE#TRPBF provides functional equivalence with dual Buck/Boost topology and comparable current ratings. However, the supply voltage maximum is 30V versus 80V for the MP4603ES-LF. Direct replacement is valid only when the application supply voltage does not exceed 30V. Package differences (16-TSSOP-EP versus 16-SOIC) require PCB layout verification.

Q: Why is the A6213KLJTR-T listed as a substitute if it only supports Buck topology? A: The A6213KLJTR-T is suitable for applications requiring Buck topology exclusively. Its 3A output current exceeds the MP4603ES-LF, and automotive qualification (AEC-Q100) provides additional reliability for automotive LED applications. Substitution is valid when the application design permits single-topology operation.

Q: What are the limitations of AP3602AKTR-G1 and LM3508TL/NOPB as substitutes? A: Both parts are single-topology Boost regulators with significantly reduced output current (100mA and 30mA respectively). These are suitable only for low-power LED applications such as backlight or camera flash. They are not suitable for applications requiring the 2.5A capability of the MP4603ES-LF.

Q: Is the TPS92662QPHPRQ1 suitable for single-output LED driver applications? A: The TPS92662QPHPRQ1 is a 12-output LED driver. While it provides PWM dimming and automotive qualification, its multi-output architecture and 48-HTQFP package make it unsuitable for single-output applications. It is intended for matrix LED driver scenarios.

Q: What packaging considerations apply when substituting the MP4603ES-LF? A: The MP4603ES-LF uses 16-SOIC (0.154", 3.90mm width). Substitutes employ different packages: LT3518EFE#TRPBF (16-TSSOP-EP), A6213KLJTR-T (8-SOIC-EP), AP3602AKTR-G1 (SOT-23-6), LM3508TL/NOPB (9-DSBGA), and TPS92662QPHPRQ1 (48-HTQFP). PCB layout, thermal management, and pin configuration must be verified before substitution.

Q: Which substitute offers the best thermal performance? A: LT3518EFE#TRPBF and A6213KLJTR-T both feature exposed pad (EP) packages, improving thermal dissipation compared to standard SOIC. LT3518EFE#TRPBF additionally supports extended operating temperature to 125°C (TJ) and carries MSL 1 rating for superior moisture resistance.

Q: Are all substitutes ROHS3 compliant? A: Yes, all listed substitutes (LT3518EFE#TRPBF, A6213KLJTR-T, AP3602AKTR-G1, LM3508TL/NOPB, and TPS92662QPHPRQ1) are ROHS3 compliant, matching the compliance status of the MP4603ES-LF.