MP4601ES-LF LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP4601ES-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 integrated Step-Down (Buck) and Step-Up (Boost) topologies, delivering 2.5A switch current with analog and PWM dimming capabilities. The part operates across a 4.5V to 75V supply range at 280kHz frequency and is optimized for backlight applications. With 813 units in current inventory and active product status, substitute parts are identified to provide design flexibility, accommodate supply chain variations, or meet specific application requirements while maintaining functional compatibility.

Substiute Parts

MP4601ES-LF

Monolithic Power Systems Inc.In Stock: 877MP4601ES-LF Datasheet

Current PartRFQ

LM2758TL/NOPB

Texas InstrumentsIn Stock: 1459LM2758TL/NOPB Datasheet

MFR RecommendedRFQ

LT3517IUF#PBF

Analog Devices Inc.In Stock: 2802LT3517IUF#PBF Datasheet

MFR RecommendedRFQ

LT3518EUF#PBF

Analog Devices Inc.In Stock: 3473LT3518EUF#PBF Datasheet

MFR RecommendedRFQ

NCP3065MNTXG

onsemiIn Stock: 4549NCP3065MNTXG Datasheet

MFR RecommendedRFQ

TS19371CX6 RFG

Taiwan Semiconductor CorporationIn Stock: 16641TS19371CX6 RFG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MP4601ES-LF are qualified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Type: DC DC Regulator
• Number of Outputs: 1
• Dimming Capability: Analog, PWM support
• Applications: Backlight or Lighting
• RoHS3 Compliance and Active Product Status

Secondary Compatibility Factors:

• Topology: Step-Down (Buck), Step-Up (Boost) preferred; Switched Capacitor (Charge Pump) acceptable for specific applications
• Internal Switch: Yes (required)
• Voltage Supply Range: Overlap with 4.5V to 75V range
• Current Output: Minimum 700mA; 1.5A to 2.5A preferred for direct replacement
• Operating Temperature: -20°C to 85°C minimum coverage
• Package Type: Surface Mount

The five identified substitutes meet these criteria with varying degrees of parameter alignment. Topology differences and current ratings determine application suitability.

Parameter Comparison

Engineering Selection Recommendations

LT3518EUF#PBF (Analog Devices Inc.) provides the closest functional match to MP4601ES-LF. Both devices employ Step-Down/Step-Up topology with 1 output, analog and PWM dimming, and backlight application focus. The LT3518EUF#PBF delivers 2.3A switch current versus 2.5A, operates across 3V to 30V (subset of MP4601ES-LF range), and is packaged in 16-QFN. Extended operating temperature range (-40°C to 125°C) and ROHS3 compliance support broad deployment. Package footprint differs from 16-SOIC, requiring PCB layout modification.

LT3517IUF#PBF (Analog Devices Inc.) offers identical topology and dimming architecture with 1.5A switch current. Suitable for applications requiring lower current delivery. Voltage range (3V to 30V) and temperature performance (-40°C to 125°C) exceed MP4601ES-LF specifications. 16-QFN package requires layout redesign.

NCP3065MNTXG (onsemi) maintains Step-Down/Step-Up topology with 1.5A switch current and analog/PWM dimming. Voltage supply range extends to 40V maximum, supporting higher input scenarios. 8-DFN package represents significant footprint reduction. Lighting application classification provides flexibility beyond backlight-specific designs. ROHS3 compliant and active status confirmed.

TS19371CX6 RFG (Taiwan Semiconductor Corporation) operates as Step-Up (Boost) only topology with 650mA switch current and analog/PWM dimming. Voltage range (2.5V to 18V) limits high-voltage applications. SOT-23-6 package offers smallest footprint. Suitable for low-power backlight circuits. Highest inventory availability (16558 units) supports rapid procurement.

LM2758TL/NOPB (Texas Instruments) employs Switched Capacitor (Charge Pump) topology, fundamentally different from MP4601ES-LF buck-boost architecture. 700mA current output and 2.7V to 5.5V voltage range restrict application scope to low-voltage camera flash and similar circuits. Lacks analog/PWM dimming capability. Not recommended for direct MP4601ES-LF replacement.

All substitute parts maintain ROHS3 compliance and active product status, ensuring regulatory alignment and long-term availability.

Frequently Asked Questions (FAQ)

Q: Can LT3518EUF#PBF directly replace MP4601ES-LF without circuit modification?

A: LT3518EUF#PBF shares identical topology (Step-Down/Step-Up), output count (1), and dimming modes (Analog, PWM). However, package differs (16-QFN versus 16-SOIC), requiring PCB layout redesign. Current rating (2.3A versus 2.5A) and voltage range (3V–30V versus 4.5V–75V) must be verified against application requirements. Schematic review is necessary to confirm compatibility.

Q: Why does LM2758TL/NOPB appear in the substitute list if it uses different topology?

A: LM2758TL/NOPB is listed as a manufacturer-identified substitute based on LED driver classification and single-output architecture. Switched Capacitor (Charge Pump) topology differs fundamentally from MP4601ES-LF buck-boost design. This part is suitable only for low-voltage applications (2.7V–5.5V) without dimming requirements. Application-specific evaluation is required before selection.

Q: What are the package implications for substitution?

A: MP4601ES-LF uses 16-SOIC (0.154", 3.90mm width). LT3517IUF#PBF and LT3518EUF#PBF employ 16-QFN (4x4), requiring different PCB footprints and via placement. NCP3065MNTXG uses 8-DFN (4x4), offering reduced board space. TS19371CX6 RFG uses SOT-23-6, the smallest package. LM2758TL/NOPB uses 12-DSBGA. Package selection impacts thermal management, signal integrity, and assembly compatibility.

Q: Which substitute supports the full 4.5V to 75V input range of MP4601ES-LF?

A: No substitute part covers the complete 4.5V to 75V range. NCP3065MNTXG extends to 40V maximum. LT3517IUF#PBF and LT3518EUF#PBF reach 30V. TS19371CX6 RFG reaches 18V. LM2758TL/NOPB reaches 5.5V. Application voltage requirements must be confirmed before substitute selection.

Q: Are all substitute parts suitable for backlight applications?

A: LT3517IUF#PBF, LT3518EUF#PBF, and TS19371CX6 RFG are explicitly rated for backlight applications. NCP3065MNTXG is rated for lighting (broader category). LM2758TL/NOPB is rated for camera flash, not backlight. Dimming capability (Analog, PWM) is present in all except LM2758TL/NOPB, which lacks dimming support.

Q: What is the significance of operating temperature range differences?

A: MP4601ES-LF operates -20°C to 85°C (TA). LT3517IUF#PBF, LT3518EUF#PBF, and NCP3065MNTXG extend to -40°C to 125°C (TJ), supporting wider environmental conditions. LM2758TL/NOPB and TS19371CX6 RFG operate -40°C to 85°C (TA). Extended temperature range enables deployment in industrial and automotive environments. Application thermal requirements determine necessity.

Q: How do frequency differences affect circuit design?

A: MP4601ES-LF operates at fixed 280kHz. LT3517IUF#PBF and LT3518EUF#PBF offer programmable range (250kHz–2.5MHz), enabling frequency optimization for specific applications. NCP3065MNTXG operates at 150kHz. TS19371CX6 RFG operates at 1.2MHz. LM2758TL/NOPB operates at 1.25MHz. Frequency selection impacts inductor selection, EMI characteristics, and efficiency. Substitutes with fixed frequencies require component recalculation.