MP1529DR-LF-P Equivalent & Substitute Parts

Part Overview

The MP1529DR-LF-P is a LED Driver IC with integrated 3-output DC-DC regulator featuring Step-Up (Boost) topology and PWM dimming capability. Manufactured by Monolithic Power Systems Inc., this component is designed for backlight and camera flash applications with 30mA standard and 150mA flash output current per channel.

The MP1529DR-LF-P carries a "Not For New Designs" product status, making it necessary to identify functionally equivalent alternatives for ongoing production and new design implementations. Substitute parts must maintain compatibility across critical electrical parameters including supply voltage range, output voltage, topology, and dimming control method.

Substiute Parts

MP1529DR-LF-P

Monolithic Power Systems Inc.In Stock: 2061MP1529DR-LF-P Datasheet

Current PartRFQ

MP1517DR-LF-Z

Monolithic Power Systems Inc.In Stock: 37174MP1517DR-LF-Z Datasheet

MFR RecommendedRFQ

LM36923YFFR

Texas InstrumentsIn Stock: 15500LM36923YFFR Datasheet

MFR RecommendedRFQ

TPS61325YFFR

Texas InstrumentsIn Stock: 3133TPS61325YFFR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP1529DR-LF-P is determined by the following critical parameters:

Primary Substitution Criteria:

• Topology: Step-Up (Boost) configuration
• Number of Outputs: 3 independent outputs
• Supply Voltage Range: Minimum 2.5V to 2.7V input; Maximum 5.5V input
• Output Voltage Capability: Minimum 25V output
• Dimming Control: PWM or equivalent control method
• Package Type: Surface mount QFN or BGA variants
• Operating Temperature Range: -40°C ~ 85°C
• Compliance: ROHS3 Compliant, MSL 1

Secondary Compatibility Factors:

• Current Output per Channel: Minimum 25mA standard operation
• Switching Frequency: 500kHz to 2MHz range
• Internal Switch Integration: Required

The substitute parts listed below meet these criteria with variations in output current capacity, package form factor, and control interface options.

Parameter Comparison

Engineering Selection Recommendations

MP1517DR-LF-Z (Monolithic Power Systems Inc.)

The MP1517DR-LF-Z is an Active product with multi-topology capability (Boost, Flyback, SEPIC) and maintains the same 16-VQFN package footprint as the MP1529DR-LF-P. However, this part features a single adjustable output rather than three fixed outputs, making it suitable only for applications requiring single-channel regulation. The extended input voltage range (2.6V to 25V) and higher output current (3A switch current) provide greater design flexibility for non-LED-specific applications. This substitute is appropriate when single-output boost regulation is required and multi-channel LED driving is not necessary.

LM36923YFFR (Texas Instruments)

The LM36923YFFR maintains the critical three-output configuration and Step-Up topology of the MP1529DR-LF-P with Active product status. This part supports both I2C and PWM dimming control, offering enhanced programmability compared to PWM-only operation. The 12-DSBGA package represents a different form factor requiring PCB layout redesign. Output current per channel is specified at 25mA, which is lower than the MP1529DR-LF-P standard 30mA rating but sufficient for many backlight applications. The output voltage capability reaches 28V, exceeding the MP1529DR-LF-P specification. This substitute is optimal for backlight-focused designs where I2C control capability adds value and package size reduction is acceptable.

TPS61325YFFR (Texas Instruments)

The TPS61325YFFR is an Active product maintaining three-output configuration and Step-Up topology with PWM dimming control matching the MP1529DR-LF-P. This part delivers significantly higher output current (445mA standard, 890mA flash) per channel, making it suitable for high-brightness LED applications and camera flash implementations. The 20-DSBGA package requires PCB redesign. Output voltage range (2.5V to 5.7V) is lower than the MP1529DR-LF-P fixed 25V output, limiting applicability to lower-voltage LED strings. This substitute is appropriate for camera flash and high-current LED driver applications where increased output current and higher switching frequency (2MHz) are beneficial.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and -40°C to 85°C operating temperature range, ensuring regulatory and environmental compatibility with the original MP1529DR-LF-P specification.

Frequently Asked Questions (FAQ)

Q: Can the MP1517DR-LF-Z replace the MP1529DR-LF-P in a three-channel LED driver application?

A: No. The MP1517DR-LF-Z provides a single adjustable output, while the MP1529DR-LF-P delivers three independent outputs. Applications requiring simultaneous control of three LED strings cannot use the MP1517DR-LF-Z without significant circuit redesign.

Q: What are the package differences between substitute options?

A: The MP1529DR-LF-P uses 16-VQFN Exposed Pad. The MP1517DR-LF-Z maintains this same package. The LM36923YFFR uses 12-DSBGA, and the TPS61325YFFR uses 20-DSBGA. BGA packages require different PCB layout and assembly processes compared to QFN packages.

Q: Is the LM36923YFFR suitable for camera flash applications?

A: The LM36923YFFR is specified for backlight applications. While it maintains three-output topology and Step-Up configuration, its 25mA per-channel output current is insufficient for typical camera flash requirements. The TPS61325YFFR is the appropriate substitute for camera flash applications.

Q: What is the significance of the MP1529DR-LF-P "Not For New Designs" status?

A: This status indicates the part is in mature or end-of-life phase and Monolithic Power Systems Inc. does not recommend its use in new product designs. All three substitute parts carry Active status, indicating ongoing manufacturer support and availability for new designs.

Q: Can output voltage be adjusted on the MP1517DR-LF-Z?

A: Yes. The MP1517DR-LF-Z features adjustable output voltage from 3.3V to 25V through external resistor configuration. The MP1529DR-LF-P, LM36923YFFR, and TPS61325YFFR have fixed or limited output voltage ranges specific to LED driver applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts (MP1517DR-LF-Z, LM36923YFFR, TPS61325YFFR) are ROHS3 compliant with MSL 1 rating, matching the environmental and regulatory compliance of the MP1529DR-LF-P.

Q: Which substitute offers the closest electrical performance match?

A: The LM36923YFFR provides the closest functional match with three outputs, Step-Up topology, PWM dimming, and similar supply voltage range. The primary differences are package form factor (12-DSBGA vs. 16-VQFN) and slightly lower per-channel current (25mA vs. 30mA).