MP3900DK-LF-P Equivalent & Substitute Parts

Part Overview

The MP3900DK-LF-P is a Boost Regulator Positive Output Step-Up DC-DC Controller IC manufactured by Monolithic Power Systems Inc. in an 8-MSOP package. This active product functions as a transistor driver for step-up (boost) topology applications with a single positive output phase. The device is supplied in Tape & Reel (TR) packaging format. Alternative part numbers are necessary when Tape & Reel packaging is unavailable or when Cut Tape & Digi-Reel® packaging is preferred for specific procurement or assembly workflows.

Key Parameters

Parameter	Value
Manufacturer	Monolithic Power Systems Inc.
Category	Power Management (PMIC)
Function	Step-Up (Boost)
Output Type	Transistor Driver
Output Configuration	Positive
Number of Outputs	1
Output Phases	1
Voltage - Supply (Vcc/Vdd)	8.6V ~ 12V
Frequency - Switching	330kHz
Duty Cycle (Max)	80%
Synchronous Rectifier	No
Clock Sync	No
Control Features	Current Limit, Enable
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package	8-MSOP
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Active

Substitute Part Grouping Explanation

The MP3900DK-LF-P has one parametric equivalent substitute: MP3900DK-LF-Z. Both parts are manufactured by Monolithic Power Systems Inc. and share identical electrical and mechanical specifications. The substitution is valid based on the following key parameters:

Identical base product number (MP3900)
Identical package type (8-MSOP)
Identical electrical specifications (supply voltage, switching frequency, duty cycle, control features)
Identical operating temperature range (-40°C ~ 85°C)
Identical compliance certifications (ROHS3, REACH Unaffected)
Identical moisture sensitivity level (MSL 1)

The only difference between these parts is the packaging format: MP3900DK-LF-P is supplied in Tape & Reel (TR) format, while MP3900DK-LF-Z is supplied in Cut Tape (CT) & Digi-Reel® format. This distinction affects procurement and assembly processes but does not impact electrical or mechanical compatibility.

Parameter Comparison

Parameter	MP3900DK-LF-P	MP3900DK-LF-Z
Manufacturer	Monolithic Power Systems Inc.	Monolithic Power Systems Inc.
Category	Power Management (PMIC)	Power Management (PMIC)
Description	IC REG CTRLR BOOST 8MSOP	IC REG CTRLR BOOST 8MSOP
Function	Step-Up	Step-Up
Output Type	Transistor Driver	Transistor Driver
Output Configuration	Positive	Positive
Number of Outputs	1	1
Output Phases	1	1
Voltage - Supply (Vcc/Vdd)	8.6V ~ 12V	8.6V ~ 12V
Frequency - Switching	330kHz	330kHz
Duty Cycle (Max)	80%	80%
Synchronous Rectifier	No	No
Clock Sync	No	No
Control Features	Current Limit, Enable	Current Limit, Enable
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package	8-MSOP	8-MSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Active	Active
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Both MP3900DK-LF-P and MP3900DK-LF-Z are active products from Monolithic Power Systems Inc. with full ROHS3 compliance and REACH Unaffected status. Selection between these parts should be based on packaging format requirements and procurement workflow:

MP3900DK-LF-P is appropriate for high-volume automated assembly processes utilizing Tape & Reel packaging.
MP3900DK-LF-Z is appropriate for applications requiring Cut Tape & Digi-Reel® packaging or lower-volume procurement scenarios.

Both parts maintain identical electrical performance, thermal characteristics, and regulatory compliance. No functional differences exist between these alternatives.

Frequently Asked Questions (FAQ)

Q: Can MP3900DK-LF-Z be used as a direct replacement for MP3900DK-LF-P?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, operating temperature range, package type (8-MSOP), and compliance certifications. The only difference is the packaging format (Tape & Reel versus Cut Tape & Digi-Reel®), which does not affect circuit performance or PCB assembly compatibility.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel® packaging?

A: Tape & Reel (TR) packaging supplies components on continuous carrier tape wound on reels, suitable for high-speed automated pick-and-place assembly. Cut Tape (CT) & Digi-Reel® packaging supplies components on cut tape segments or alternative reel formats, typically used for lower-volume production or manual assembly workflows.

Q: Are there any electrical or thermal performance differences between these parts?

A: No. Both MP3900DK-LF-P and MP3900DK-LF-Z operate at identical supply voltage ranges (8.6V ~ 12V), switching frequency (330kHz), duty cycle (80%), and temperature range (-40°C ~ 85°C). Performance is equivalent across all electrical parameters.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both parts are ROHS3 compliant and REACH Unaffected. Moisture sensitivity level is identical (MSL 1 - Unlimited) for both variants.

Q: Which part should be selected for new designs?

A: Selection depends on manufacturing requirements. For automated high-volume assembly, MP3900DK-LF-P (Tape & Reel) is standard. For applications requiring alternative packaging formats or lower-volume procurement, MP3900DK-LF-Z (Cut Tape & Digi-Reel®) is appropriate. Both are active products with equivalent technical specifications.

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