MP3205DJ-LF-Z Equivalent & Substitute Parts

Part Overview

The MP3205DJ-LF-Z is an LED Driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This device functions as a single-output DC-DC regulator with Step-Up (Boost) topology, delivering 21V output at 350mA switch current with integrated PWM and Analog dimming capabilities. The part operates across a 2.5V to 6V supply range and is optimized for backlight applications. Currently in Active product status with 33,004 units in stock, this component is ROHS3 compliant and REACH unaffected.

Substitute parts are necessary when the MP3205DJ-LF-Z becomes unavailable, when alternative packaging formats are required, or when design specifications allow for functional equivalents with different electrical or mechanical characteristics.

Key Parameters

Parameter	Value
Manufacturer Part Number	MP3205DJ-LF-Z
Manufacturer	Monolithic Power Systems Inc.
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Up (Boost)
Package / Case	SOT-23-5 Thin, TSOT-23-5
Voltage - Supply (Min)	2.5V
Voltage - Supply (Max)	6V
Voltage - Output	21V
Current - Output / Channel	350mA (Switch)
Frequency	1.3MHz
Dimming	Analog, PWM
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the MP3205DJ-LF-Z is determined by the following critical parameters:

Topology Match: Step-Up (Boost) configuration is mandatory for functional equivalence in boost converter applications.

Voltage Specifications: Input supply range (2.5V to 6V minimum/maximum) and output voltage (21V) define the operating envelope. Substitute parts must support these ranges or provide compatible alternatives.

Current Rating: The 350mA switch current establishes the power delivery capability. Substitutes with equal or higher current ratings maintain or improve performance.

Dimming Capability: Analog and PWM dimming support is a functional requirement. Substitutes must provide at least one of these dimming methods.

Package Compatibility: TSOT-23-5 (SOT-23-5 Thin) packaging defines the physical footprint. Substitutes in alternative packages require PCB redesign.

Frequency: Operating frequency of 1.3MHz influences component selection and EMI characteristics.

Compliance: ROHS3 compliance and REACH unaffected status are mandatory for regulated applications.

Parameter Comparison

Parameter	MP3205DJ-LF-Z	MP3205DJ-LF-P	AP3031KTR-G1	LM3402HVMMX/NOPB	LM3530UME-25A/NOPB	LT3491ESC8#TRPBF	LTC3490ES8#PBF	MCP1643-I/MC	MCP1662T-E/OT	PAM2841GR	SP6699EK-L/TR
Manufacturer	MPS	MPS	Diodes Inc.	Texas Instruments	Texas Instruments	Analog Devices	Analog Devices	Microchip	Microchip	Diodes Inc.	MaxLinear
Type	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator
Topology	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Down (Buck)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)
Voltage - Supply (Min)	2.5V	2.5V	2.7V	6V	2.7V	2.5V	1V	0.5V	2.4V	2.7V	2.5V
Voltage - Supply (Max)	6V	6V	16V	75V	5.5V	12V	3.2V	5V	5.5V	5.5V	16V
Voltage - Output	21V	21V	—	73V	40V	—	2.8V ~ 4V	5V	32V	40V	27V
Current - Output / Channel	350mA (Switch)	350mA (Switch)	1.4A (Switch)	500mA	30mA	350mA (Switch)	350mA	550mA	200mA	1.5A (Switch)	500mA (Switch)
Frequency	1.3MHz	1.3MHz	1MHz	1MHz	500kHz	2.3MHz	1.3MHz	1MHz	500kHz	1MHz	1MHz
Dimming	Analog, PWM	Analog, PWM	PWM	PWM	PWM	PWM	Analog	PWM	PWM	Analog, PWM	PWM
Package / Case	SOT-23-5 Thin, TSOT-23-5	SOT-23-5 Thin, TSOT-23-5	SOT-23-6 Thin, TSOT-23-6	8-TSSOP, 8-MSOP	12-XFBGA, DSBGA	8-VFSOP	8-SOIC	8-VFDFN Exposed Pad	SC-74A, SOT-753	8-WFDFN Exposed Pad	SOT-23-6
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TJ)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Obsolete

Engineering Selection Recommendations

Parametric Equivalent (Same Manufacturer, Different Packaging):

MP3205DJ-LF-P is the direct parametric equivalent to MP3205DJ-LF-Z, differing only in packaging format (Tape & Reel versus standard packaging). This substitute maintains identical electrical specifications, topology, and performance characteristics. Selection is appropriate when packaging format availability or supply chain requirements necessitate the alternative format. Both parts are Active status with ROHS3 compliance.

Topology-Matched Substitutes (Step-Up Boost, Active Status):

The following parts maintain Step-Up (Boost) topology with Active product status and ROHS3 compliance:

AP3031KTR-G1 (Diodes Incorporated) provides higher switch current (1.4A) in SOT-23-6 package. Supply voltage range extends to 16V maximum. Suitable when higher current capacity is acceptable and package change is feasible.

LM3530UME-25A/NOPB (Texas Instruments) operates in 12-DSBGA package with lower output current (30mA). Appropriate for applications where reduced current and BGA packaging are compatible with design requirements.

LT3491ESC8#TRPBF (Analog Devices Inc.) delivers 350mA switch current in SC-70-8 package with extended supply voltage range to 12V. Frequency of 2.3MHz differs from the primary part. Suitable when package change and higher frequency operation are acceptable.

LTC3490ES8#PBF (Analog Devices Inc.) operates with lower supply voltage range (1V to 3.2V) and lower output voltage (2.8V to 4V) in 8-SOIC package. Appropriate only for applications with reduced voltage requirements.

MCP1643-I/MC (Microchip Technology) provides 550mA switch current in 8-DFN package with extended lower supply limit (0.5V). Suitable when higher current and compact DFN packaging are required.

MCP1662T-E/OT (Microchip Technology) delivers 200mA output current in SOT-23-5 package with extended operating temperature to 125°C. Appropriate when reduced current and improved temperature range are acceptable.

PAM2841GR (Diodes Incorporated) provides 1.5A switch current with Analog and PWM dimming in 8-DFN package. Supply range 2.7V to 5.5V and output voltage to 40V. Suitable when higher current capacity is required.

SP6699EK-L/TR (MaxLinear, Inc.) delivers 500mA switch current in SOT-23-6 package with extended supply range to 16V. Product status is Obsolete; selection not recommended for new designs.

Topology Deviation (Step-Down Buck):

LM3402HVMMX/NOPB (Texas Instruments) employs Step-Down (Buck) topology, fundamentally different from the Step-Up (Boost) requirement. This part is not suitable as a direct substitute due to topology mismatch, despite Active status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can MP3205DJ-LF-P replace MP3205DJ-LF-Z directly without PCB modification?

A: Yes. MP3205DJ-LF-P is a parametric equivalent differing only in packaging format (Tape & Reel). Both use TSOT-23-5 package with identical pinout, electrical specifications, and performance. No PCB modification is required.

Q: What is the primary difference between Step-Up (Boost) and Step-Down (Buck) topologies?

A: Step-Up (Boost) topology increases input voltage to a higher output voltage, suitable for applications requiring voltage elevation. Step-Down (Buck) topology reduces input voltage to a lower output voltage. These topologies are not interchangeable; circuit design and component selection depend on the specific topology requirement.

Q: Why is LM3402HVMMX/NOPB listed as a substitute if it uses Buck topology?

A: LM3402HVMMX/NOPB is listed in the provided substitute data but is not functionally equivalent due to topology mismatch. This part should not be selected as a replacement for MP3205DJ-LF-Z in boost converter applications.

Q: Which substitute parts maintain the same package as MP3205DJ-LF-Z?

A: MCP1662T-E/OT maintains SOT-23-5 package compatibility. All other substitutes require different packages (SOT-23-6, 8-DFN, 8-SOIC, 8-VFSOP, 12-DSBGA, 8-WFDFN), necessitating PCB redesign.

Q: Can I use a substitute with higher switch current rating?

A: Yes. Substitutes with equal or higher current ratings (such as AP3031KTR-G1 at 1.4A, PAM2841GR at 1.5A, or MCP1643-I/MC at 550mA) maintain or improve power delivery capability. Design verification is required to confirm compatibility with the application circuit.

Q: Are all listed substitutes suitable for new product designs?

A: No. SP6699EK-L/TR carries Obsolete product status and is not recommended for new designs. All other substitutes maintain Active status. Verify product status with the manufacturer before final component selection.

Q: What dimming options are available across substitute parts?

A: MP3205DJ-LF-Z supports both Analog and PWM dimming. Substitutes offer varying dimming capabilities: AP3031KTR-G1, LM3402HVMMX/NOPB, LM3530UME-25A/NOPB, LT3491ESC8#TRPBF, MCP1643-I/MC, MCP1662T-E/OT, and SP6699EK-L/TR support PWM only. LTC3490ES8#PBF supports Analog only. PAM2841GR supports both Analog and PWM. Verify dimming requirements before selection.

Q: Do all substitutes maintain ROHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of MP3205DJ-LF-Z.

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