LM3401MM/NOPB LED Driver Controller Equivalent & Substitute Parts

Part Overview

The LM3401MM/NOPB is an active LED Driver IC manufactured by Texas Instruments, classified as a Power Management PMIC. This device functions as a DC-DC controller with step-down (buck) topology, delivering 1A output current at PWM dimming capability. The part operates across a 4.5V to 35V supply range with a switching frequency of 1.5MHz, housed in an 8-VSSOP surface mount package.

The LM3401MM/NOPB maintains active product status with full ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching functional topology, dimming methodology, and electrical operating parameters that permit direct functional replacement in LED driver applications.

Key Parameters

Parameter	LM3401MM/NOPB
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Type	DC DC Controller
Topology	Step-Down (Buck)
Number of Outputs	1
Voltage Supply Range	4.5V to 35V
Current Output / Channel	1A
Switching Frequency	1.5MHz
Dimming Method	PWM
Operating Temperature	-40°C to 125°C (TJ)
Package Type	8-VSSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the LM3401MM/NOPB are qualified based on the following substitution criteria:

Primary Matching Parameters:

Topology: Step-Down (Buck) DC-DC controller
Dimming Capability: PWM dimming support
Output Configuration: Single output LED driver
Supply Voltage Overlap: Minimum 4.5V to maximum 35V operating range compatibility
Operating Temperature Range: -40°C to 125°C
Compliance: ROHS3 compliant, MSL 1 rating
Product Status: Active

Secondary Considerations:

Switching frequency compatibility (1.5MHz nominal)
Surface mount packaging with exposed pad variants
Internal switch configuration (no internal switch required)

The following parts meet these substitution criteria and are listed as manufacturer-recommended equivalents:

LT3763IFE#PBF (Analog Devices Inc.) – 28-TSSOP-EP package
MIC3203-1YM (Microchip Technology) – 8-SOIC package
MAX16819ATT+T (Analog Devices Inc./Maxim Integrated) – 6-TDFN package
LT3743EUFD#PBF (Analog Devices Inc.) – 28-QFN package
MP4700GS-Z (Monolithic Power Systems Inc.) – 8-SOIC package
HV9910CNG-G (Microchip Technology) – 16-SOIC package

Parameter Comparison

Parameter	LM3401MM/NOPB	LT3763IFE#PBF	MIC3203-1YM	MAX16819ATT+T	LT3743EUFD#PBF	MP4700GS-Z	HV9910CNG-G
Manufacturer	Texas Instruments	Analog Devices Inc.	Microchip Technology	Analog Devices Inc./Maxim	Analog Devices Inc.	Monolithic Power Systems	Microchip Technology
Type	DC DC Controller	DC DC Controller	DC DC Controller	DC DC Controller	DC DC Controller	DC DC Controller	DC DC Controller
Topology	Step-Down (Buck)	Step-Down (Buck)	Step-Down (Buck)	Step-Down (Buck)	Step-Down (Buck)	Step-Down (Buck)	Step-Down (Buck)
Number of Outputs	1	1	1	1	1	1	1
Voltage Supply (Min)	4.5V	6V	4.5V	4.5V	6V	8V	15V
Voltage Supply (Max)	35V	60V	42V	28V	36V	18V	450V
Switching Frequency	1.5MHz	200kHz–1MHz	1.5MHz	2MHz	200kHz–1MHz	160kHz	25kHz, 100kHz
Dimming Method	PWM	PWM	PWM	PWM	PWM	PWM	Analog, PWM
Operating Temperature	-40°C to 125°C (TJ)	-40°C to 125°C (TJ)	-40°C to 125°C (TJ)	-40°C to 125°C (TA)	-40°C to 125°C (TJ)	-40°C to 125°C (TJ)	-40°C to 125°C (TJ)
Package Type	8-VSSOP	28-TSSOP-EP	8-SOIC	6-TDFN (3x3)	28-QFN (4x5)	8-SOIC	16-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain active product status and ROHS3 compliance, meeting baseline regulatory and supply chain requirements. Selection among substitutes depends on specific application constraints:

MIC3203-1YM and MP4700GS-Z provide the closest package footprint compatibility to the LM3401MM/NOPB, both utilizing 8-SOIC surface mount packages. MIC3203-1YM matches the 1.5MHz switching frequency and 4.5V minimum supply voltage of the original part. MP4700GS-Z operates within a narrower 8V to 18V supply range and includes automotive-grade qualification.

MAX16819ATT+T offers the smallest package footprint (6-TDFN) with 2MHz switching frequency and maintains the 4.5V minimum supply voltage specification. This option suits space-constrained applications.

LT3763IFE#PBF and LT3743EUFD#PBF provide extended supply voltage ranges (60V and 36V maximum respectively) with programmable frequency control (200kHz to 1MHz), accommodating higher input voltage applications. Both employ larger package formats (28-TSSOP-EP and 28-QFN respectively).

HV9910CNG-G supports the widest supply voltage range (15V to 450V) with dual dimming capability (analog and PWM), suitable for high-voltage LED signage and backlight applications. This part operates at lower switching frequencies (25kHz, 100kHz).

All substitute parts carry unlimited moisture sensitivity ratings (MSL 1) except MP4700GS-Z (MSL 2, 1 Year), ensuring equivalent handling and storage requirements for most applications.

Frequently Asked Questions (FAQ)

Q: Can LM3401MM/NOPB be directly replaced with MIC3203-1YM without circuit modification?

A: MIC3203-1YM shares identical topology, dimming method, switching frequency, and supply voltage range with LM3401MM/NOPB. Package footprint differs (8-SOIC versus 8-VSSOP), requiring PCB layout adjustment. Functional substitution is valid when pin configuration and control signal requirements align with application design.

Q: What is the primary difference between LT3763IFE#PBF and LT3743EUFD#PBF?

A: Both are Analog Devices step-down LED driver controllers with PWM dimming. LT3763IFE#PBF supports 6V to 60V input with 55V output specification in 28-TSSOP-EP package. LT3743EUFD#PBF operates 6V to 36V input in 28-QFN package. Selection depends on output voltage requirements and available PCB space for package type.

Q: Is MAX16819ATT+T suitable for applications requiring 1A output current?

A: MAX16819ATT+T specifications do not explicitly state output current rating. This part is qualified as a functional substitute based on topology, dimming capability, and supply voltage compatibility. Output current capability must be verified against application requirements and detailed device datasheet before implementation.

Q: Why does MP4700GS-Z have MSL 2 rating while other substitutes have MSL 1?

A: MP4700GS-Z carries MSL 2 (1 Year) moisture sensitivity level, requiring stricter moisture control during storage and handling compared to MSL 1 (Unlimited) parts. This difference reflects manufacturing process and material composition. Applications with extended shelf storage or humid environments may require additional desiccant packaging for MP4700GS-Z.

Q: Can HV9910CNG-G replace LM3401MM/NOPB in standard LED driver circuits?

A: HV9910CNG-G operates at significantly different supply voltage range (15V to 450V minimum versus 4.5V) and lower switching frequencies (25kHz, 100kHz). While topology and dimming capability match, this part is engineered for high-voltage applications such as LED signage and backlighting. Direct substitution in low-voltage circuits is not recommended without comprehensive circuit redesign.

Q: What packaging considerations apply when substituting from 8-VSSOP to larger packages?

A: Package migration from 8-VSSOP to 8-SOIC, 6-TDFN, 16-SOIC, 28-TSSOP-EP, or 28-QFN requires PCB layout redesign including trace routing, thermal management, and component placement. Larger packages generally provide improved thermal dissipation and may simplify external component integration. Pin-to-pin compatibility must be verified against application schematic before implementation.

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