MP1519DQL-LF-Z Equivalent & Substitute Parts

Part Overview

The MP1519DQL-LF-Z is an LED Driver IC manufactured by Monolithic Power Systems Inc., designed for backlight applications. This device integrates a 3-output DC-DC regulator utilizing switched capacitor (charge pump) topology with analog dimming capability in a compact 16-QFN (3x3) surface mount package. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and production continuity.

Substiute Parts

MP1519DQL-LF-Z

Monolithic Power Systems Inc.In Stock: 25324MP1519DQL-LF-Z Datasheet

Current PartRFQ

MP1519DQ-LF-Z

Monolithic Power Systems Inc.In Stock: 25251MP1519DQ-LF-Z Datasheet

DirectRFQ

LM3435SQX/NOPB

Texas InstrumentsIn Stock: 3796LM3435SQX/NOPB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MP1519DQL-LF-Z is determined by the following critical parameters:

Primary Substitution Criteria:

• Topology: Switched Capacitor (Charge Pump) or equivalent DC-DC regulation method
• Number of Outputs: 3 or greater
• Supply Voltage Range: Minimum 2.5V, Maximum 5.5V or compatible overlap
• Dimming Control: Analog or compatible control interface
• Package Type: Surface mount with compatible pinout and thermal characteristics
• Product Status: Active or readily available inventory

Secondary Compatibility Factors:

• Operating frequency in the 1MHz to 1.3MHz range
• Operating temperature range encompassing -40°C to 85°C
• RoHS3 compliance and REACH compliance status
• Mounting type: Surface Mount

Substitutes are classified into two categories: direct manufacturer alternatives (same base product family) and similar manufacturer alternatives (different manufacturers with equivalent functional specifications).

Parameter Comparison

Engineering Selection Recommendations

MP1519DQ-LF-Z (Direct Substitute - Recommended)

The MP1519DQ-LF-Z is the primary substitute for the obsolete MP1519DQL-LF-Z. Both devices share identical topology (switched capacitor charge pump), supply voltage range (2.5V to 5.5V), operating frequency (1.3MHz), analog dimming control, and package form factor (16-VFQFN 3x3). The MP1519DQ-LF-Z is currently in active production status with substantial inventory availability (25,200 pcs). The primary difference is an increased number of outputs (4 versus 3) and specified output current per channel (22mA). This device maintains full compliance with ROHS3 and REACH requirements. The identical package and pinout compatibility with the main part enables direct substitution for backlight applications.

LM3435SQX/NOPB (Similar Substitute - Alternative)

The LM3435SQX/NOPB from Texas Instruments provides an alternative solution for applications requiring LED driver functionality. This device maintains the 3-output configuration and overlapping supply voltage range (2.7V to 5.5V) of the main part. However, substitution requires design consideration of the following differences: topology change from switched capacitor to flyback regulation, dimming control via I2C instead of analog, higher switch current capability (2A), extended operating temperature range (-40°C to 150°C), and significantly larger package footprint (40-WQFN 5x5 versus 16-VFQFN 3x3). This substitute is suitable only for applications where PCB layout can accommodate the larger package and where I2C dimming control is compatible with system architecture. The device is in active production with lower inventory availability (3,764 pcs).

Frequently Asked Questions (FAQ)

Q: Can the MP1519DQ-LF-Z directly replace the MP1519DQL-LF-Z without circuit modifications?

A: The MP1519DQ-LF-Z is designed as a direct substitute within the same product family. Both devices share identical supply voltage specifications (2.5V to 5.5V), operating frequency (1.3MHz), topology (switched capacitor charge pump), analog dimming control, and package form factor (16-VFQFN 3x3). The primary difference is the increased number of outputs (4 versus 3) and specified output current (22mA per channel). Direct substitution is supported for backlight applications.

Q: What are the key differences between the MP1519DQ-LF-Z and LM3435SQX/NOPB?

A: The MP1519DQ-LF-Z and LM3435SQX/NOPB differ in multiple critical parameters. The MP1519DQ-LF-Z uses switched capacitor topology with analog dimming in a compact 16-VFQFN (3x3) package, while the LM3435SQX/NOPB employs flyback topology with I2C dimming control in a larger 40-WQFN (5x5) package. The LM3435SQX/NOPB provides higher switch current (2A) and extended temperature range (-40°C to 150°C). Selection depends on application requirements for package size, control interface, and thermal performance.

Q: Is the LM3435SQX/NOPB suitable for applications currently using the MP1519DQL-LF-Z?

A: The LM3435SQX/NOPB can serve as a functional alternative for LED driver applications but requires design evaluation. The larger package footprint (40-WQFN 5x5 versus 16-VFQFN 3x3) necessitates PCB layout modifications. The I2C dimming control interface differs from the analog control of the original part, requiring firmware or control circuit adaptation. The higher switch current capability and extended temperature range may provide benefits for specific applications. Compatibility assessment must include circuit topology, control architecture, and physical layout constraints.

Q: Are all substitute parts RoHS3 and REACH compliant?

A: Yes. Both the MP1519DQ-LF-Z and LM3435SQX/NOPB are ROHS3 compliant and REACH unaffected, matching the compliance status of the main part MP1519DQL-LF-Z.

Q: What is the inventory status of substitute parts?

A: The MP1519DQ-LF-Z maintains substantial inventory (25,200 pcs new original in stock), providing reliable supply continuity. The LM3435SQX/NOPB has lower inventory availability (3,764 pcs new original in stock). Inventory levels should be verified with suppliers for production planning purposes.

Q: Can the MP1519DQ-LF-Z be used in designs requiring exactly 3 outputs instead of 4?

A: The MP1519DQ-LF-Z provides 4 outputs compared to the 3 outputs of the MP1519DQL-LF-Z. Designs requiring exactly 3 outputs can utilize the MP1519DQ-LF-Z by leaving the fourth output unused or by implementing appropriate circuit design to accommodate the additional output channel. The identical package and pinout structure supports this approach.