LT8386EV#PBF Equivalent & Substitute Parts

Part Overview

The LT8386EV#PBF is an LED Driver IC manufactured by Analog Devices Inc., classified as a Power Management PMIC. This device functions as a 1-output DC DC regulator with Step-Up (Boost) topology, delivering PWM dimming capability at 3A output current. The part is Active in product status and carries Automotive grade qualification with AEC-Q100 certification. Substitute parts are identified when original inventory is unavailable, when alternative packaging or thermal characteristics are required, or when application-specific performance parameters necessitate component alternatives within the LED driver IC category.

Key Parameters

Parameter	Value
Manufacturer Part Number	LT8386EV#PBF
Manufacturer	Analog Devices Inc.
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Up (Boost)
Number of Outputs	1
Voltage - Supply (Min)	4V
Voltage - Supply (Max)	56V
Voltage - Output	1.2V ~ 56V
Current - Output / Channel	3A
Frequency	200kHz ~ 2MHz
Dimming	PWM
Operating Temperature	-40°C ~ 125°C (TJ)
Grade	Automotive
Qualification	AEC-Q100
Package / Case	28-TFQFN Exposed Pad, 26 Leads
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the LT8386EV#PBF are selected based on functional equivalence within the LED Driver IC category. The primary substitution criteria are:

Topology Compatibility: The main part operates as a Step-Up (Boost) DC DC regulator. Substitute parts are grouped by topology type, with primary equivalents maintaining Step-Up (Boost) topology and secondary equivalents including alternative topologies (Step-Down/Buck or combined Buck-Boost) when application requirements permit.

Output Current Rating: The LT8386EV#PBF delivers 3A output current. Substitute parts are evaluated for current capacity, with parts rated at or above 3A considered direct equivalents, and lower-rated parts (1A, 1.2A, 1.8A, 2.5A) considered for applications with reduced current demands.

Supply Voltage Range: The main part accepts 4V to 56V input. Substitute parts with overlapping or encompassing supply voltage ranges are qualified for substitution.

Dimming Capability: The LT8386EV#PBF includes PWM dimming. Substitute parts with PWM dimming are preferred; parts without dimming capability are listed but with functional limitations noted.

Thermal and Compliance Requirements: The main part carries Automotive grade and AEC-Q100 qualification. Substitute parts with matching or equivalent automotive certifications are prioritized.

Package and Mounting: Surface mount packages are maintained across all substitutes. Package form factors vary (28-LQFN, SOT-23-5, 8-SOIC, 10-MLF, 10-QFN, SC-70-5) based on application constraints.

Parameter Comparison

Parameter	LT8386EV#PBF	MIC2297-38YML-TR	LM3404MAX/NOPB	MPQ2483ADQ-LF-P	LM2705MFX-ADJ/NOPB	TPS61169DCKR
Manufacturer	Analog Devices Inc.	Microchip Technology	Texas Instruments	Monolithic Power Systems Inc.	Texas Instruments	Texas Instruments
Category	Power Management (PMIC)	Power Management (PMIC)	Power Management (PMIC)	Power Management (PMIC)	Power Management (PMIC)	Power Management (PMIC)
Type	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-Down (Buck)	Step-Down (Buck), Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)
Number of Outputs	1	1	1	1	1	1
Voltage - Supply (Min)	4V	2.5V	6V	4.5V	2.2V	2.7V
Voltage - Supply (Max)	56V	10V	42V	55V	7V	5.5V
Current - Output / Channel	3A	1.2A (Switch)	1A	2.5A	150mA	1.8A (Switch)
Frequency	200kHz ~ 2MHz	600kHz	1MHz	250kHz	-	1.2MHz
Dimming	PWM	PWM	PWM	Analog, PWM	-	PWM
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TJ)
Grade	Automotive	Automotive	Automotive	Automotive	-	-
Mounting Type	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
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility)

MIC2297-38YML-TR (Microchip Technology): This part maintains Step-Up (Boost) topology with PWM dimming capability. Operating temperature range extends to -40°C ~ 125°C (TJ), matching the main part. Automotive grade qualification is present. Current output of 1.2A is lower than the 3A specification; this part is suitable for applications with reduced current requirements. Supply voltage range (2.5V ~ 10V) is narrower than the main part.

MPQ2483ADQ-LF-P (Monolithic Power Systems Inc.): This part offers dual topology (Step-Down/Step-Up) with both Analog and PWM dimming modes. Current output of 2.5A approaches the 3A specification. Supply voltage range (4.5V ~ 55V) closely matches the main part (4V ~ 56V). Automotive grade qualification is present. Operating temperature extends to -40°C ~ 125°C (TJ). This part provides flexibility for applications requiring either boost or buck conversion.

TPS61169DCKR (Texas Instruments): This part maintains Step-Up (Boost) topology with PWM dimming. Current output of 1.8A (Switch) is lower than 3A. Supply voltage range (2.7V ~ 5.5V) is significantly narrower. Operating temperature extends to -40°C ~ 125°C (TJ). This part is suitable for low-voltage input applications with moderate current demands.

Secondary Substitutes (Functional Alternatives)

LM3404MAX/NOPB (Texas Instruments): This part operates as a Step-Down (Buck) regulator with PWM dimming, differing from the main part's Step-Up topology. Current output of 1A is lower than 3A. Supply voltage range (6V ~ 42V) overlaps with the main part. Automotive grade qualification and AEC-Q100 certification are present. Operating temperature extends to -40°C ~ 125°C (TJ). This part is applicable only to applications where buck conversion is acceptable.

LM2705MFX-ADJ/NOPB (Texas Instruments): This part maintains Step-Up (Boost) topology but lacks PWM dimming capability. Current output of 150mA is significantly lower than 3A. Supply voltage range (2.2V ~ 7V) is narrower. Operating temperature range is -40°C ~ 85°C (TA), lower than the main part. This part is suitable only for low-current backlight applications without dimming requirements.

Compliance and Certification: All substitute parts maintain ROHS3 compliance and Active product status. Parts with Automotive grade (MIC2297-38YML-TR, LM3404MAX/NOPB, MPQ2483ADQ-LF-P) are preferred for automotive applications. Parts without automotive grade (LM2705MFX-ADJ/NOPB, TPS61169DCKR) are restricted to non-automotive applications.

Frequently Asked Questions (FAQ)

Q: Can the MIC2297-38YML-TR directly replace the LT8386EV#PBF in all applications?

A: The MIC2297-38YML-TR maintains Step-Up (Boost) topology and PWM dimming, but output current is 1.2A versus 3A on the main part. Direct replacement is limited to applications requiring 1.2A or less. Supply voltage range (2.5V ~ 10V) is narrower than the main part (4V ~ 56V), restricting use to lower-voltage input systems.

Q: What is the primary difference between the MPQ2483ADQ-LF-P and the LT8386EV#PBF?

A: The MPQ2483ADQ-LF-P offers dual topology (Step-Down/Step-Up) with both Analog and PWM dimming, whereas the LT8386EV#PBF is Step-Up only with PWM dimming. Output current on the MPQ2483ADQ-LF-P is 2.5A versus 3A. The MPQ2483ADQ-LF-P provides topology flexibility for applications requiring either boost or buck conversion.

Q: Why is the LM3404MAX/NOPB listed as a substitute if it uses Step-Down (Buck) topology?

A: The LM3404MAX/NOPB is included as a secondary substitute for applications where buck conversion is functionally acceptable. It maintains PWM dimming, Automotive grade qualification, and AEC-Q100 certification. This part is not suitable for applications requiring step-up voltage conversion.

Q: Can the LM2705MFX-ADJ/NOPB be used in automotive applications?

A: The LM2705MFX-ADJ/NOPB lacks Automotive grade qualification and carries a lower operating temperature range (-40°C ~ 85°C TA versus -40°C ~ 125°C TJ on the main part). This part is restricted to non-automotive applications. Additionally, it lacks PWM dimming capability and delivers only 150mA output current.

Q: What are the package differences among substitute parts?

A: The LT8386EV#PBF uses 28-TFQFN (26 Leads). Substitutes employ different packages: MIC2297-38YML-TR uses 10-MLF (3x3), LM3404MAX/NOPB uses 8-SOIC, MPQ2483ADQ-LF-P uses 10-QFN (3x3), LM2705MFX-ADJ/NOPB uses SOT-23-5, and TPS61169DCKR uses SC-70-5. Package selection depends on PCB layout constraints and thermal management requirements.

Q: Which substitute part is best for high-current LED driver applications?

A: The MPQ2483ADQ-LF-P delivers 2.5A output current, the highest among substitutes. For applications requiring the full 3A specification of the main part, no direct substitute exists; the main part LT8386EV#PBF must be used.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant, matching the main part's compliance status.

Q: What is the thermal difference between the LM2705MFX-ADJ/NOPB and other substitutes?

A: The LM2705MFX-ADJ/NOPB operates at -40°C ~ 85°C (TA), whereas the main part and most substitutes operate at -40°C ~ 125°C (TJ). This 40°C difference in maximum operating temperature restricts the LM2705MFX-ADJ/NOPB to applications with lower thermal requirements.

Q: Can the TPS61169DCKR handle the full supply voltage range of the LT8386EV#PBF?

A: No. The TPS61169DCKR accepts 2.7V ~ 5.5V input, whereas the main part accepts 4V ~ 56V. The TPS61169DCKR is limited to low-voltage input applications and cannot operate at the higher supply voltages supported by the main part.

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