MIC2874YCS-TR LED Driver IC Equivalent & Substitute Parts

Part Overview

The MIC2874YCS-TR is a single-output LED driver IC manufactured by Microchip Technology, designed for camera flash applications. This device integrates a DC-DC step-up (boost) regulator with single-wire dimming capability, delivering 1.2A flash current from a 2.7V to 5.5V supply. The part is currently active in production with 685 units in stock.

Substitute parts are necessary when the MIC2874YCS-TR becomes unavailable, when alternative packaging formats are required, or when application requirements demand different electrical characteristics such as higher current capacity, extended supply voltage range, or alternative dimming control methods.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Part Number	MIC2874YCS-TR
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Up (Boost)
Number of Outputs	1
Voltage Supply (Min)	2.7V
Voltage Supply (Max)	5.5V
Current Output / Channel	1.2A (Flash)
Frequency	4MHz
Dimming	Single-Wire
Package / Case	9-UFBGA, WLCSP (1.3x1.3)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)
Part Status	Active

Substitute Part Grouping Explanation

Substitution logic for the MIC2874YCS-TR is based on the following critical parameters:

Primary Substitution Criteria:

Topology: Step-Up (Boost) regulator function
Supply voltage compatibility: 2.7V to 5.5V input range
Output current capability: Minimum 1.2A for flash applications
Dimming control method: Single-wire or compatible dimming interface
Package compatibility: Surface mount, compact form factor
Operating temperature range: -40°C to 85°C minimum
RoHS3 compliance and MSL rating

Parametric Equivalent (Same Topology, Same Supply Range):

MIC2873YCS-TR: Identical electrical specifications except frequency (2MHz vs 4MHz) and packaging format (Cut Tape vs Tape & Reel)

Functional Alternatives (Different Topology or Extended Capabilities):

MAX1561ETA+T: Step-Up (Boost) topology with compatible 2.6V-5.5V supply range, lower current (950mA), but includes analog/PWM dimming
LT3518EFE#PBF: Dual topology (Buck/Boost) with extended supply range (3V-30V), higher current (2.3A), analog/PWM dimming
A6213KLJTR-T: Step-Down (Buck) topology with higher current (3A), extended supply range (6V-48V), automotive grade, PWM dimming
RT8476GS: Dual topology (Buck/Boost) with extended supply range (4.5V-40V), obsolete status, automotive grade

Parameter Comparison

Parameter	MIC2874YCS-TR	MIC2873YCS-TR	MAX1561ETA+T	LT3518EFE#PBF	A6213KLJTR-T	RT8476GS
Manufacturer	Microchip	Microchip	Analog Devices/Maxim	Analog Devices	Allegro MicroSystems	Richtek USA
Topology	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Buck/Boost	Step-Down (Buck)	Buck/Boost
Supply Voltage Min	2.7V	2.7V	2.6V	3V	6V	4.5V
Supply Voltage Max	5.5V	5.5V	5.5V	30V	48V	40V
Output Current	1.2A (Flash)	1.2A (Flash)	950mA (Switch)	2.3A (Switch)	3A	Not Specified
Frequency	4MHz	2MHz	1MHz	250kHz-2.5MHz	Not Specified	Not Specified
Dimming	Single-Wire	Single-Wire	Analog, PWM	Analog, PWM	PWM	Not Specified
Package	9-WLCSP (1.3x1.3)	9-WLCSP (1.3x1.3)	8-TDFN (3x3)	16-TSSOP-EP	8-SOIC-EP	8-SOP
Operating Temp	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C
RoHS3 Compliant	Yes	Yes	Yes	Yes	Yes	Yes
Part Status	Active	Active	Active	Active	Active	Obsolete
Automotive Grade	No	No	No	No	Yes (AEC-Q100)	Yes

Engineering Selection Recommendations

Direct Parametric Equivalent: MIC2873YCS-TR is the closest substitute, offering identical electrical performance within the 2.7V-5.5V supply range and 1.2A flash current specification. The primary difference is switching frequency (2MHz vs 4MHz) and packaging format (Cut Tape & Digi-Reel vs Tape & Reel). This part maintains full compatibility with single-wire dimming applications and is currently active with higher inventory availability (1052 units).

For Extended Supply Voltage Applications: LT3518EFE#PBF provides dual topology capability (Buck/Boost) with extended supply range (3V-30V) and higher switch current (2.3A). This part supports both analog and PWM dimming methods and operates at higher junction temperatures (-40°C to 125°C). The 16-TSSOP-EP package is larger than the MIC2874YCS-TR but offers greater design flexibility.

For Higher Current Requirements: A6213KLJTR-T delivers 3A output current with step-down (Buck) topology, suitable for applications requiring higher LED current. Supply range extends to 48V maximum. This part includes automotive-grade qualification (AEC-Q100) and operates to 125°C. PWM dimming is supported. Package is 8-SOIC-EP.

For Automotive Applications: A6213KLJTR-T and RT8476GS both carry automotive qualification. A6213KLJTR-T is active and recommended. RT8476GS is obsolete and should not be selected for new designs.

Not Recommended: RT8476GS is obsolete and lacks specified current output and dimming parameters, making it unsuitable for new applications.

Frequently Asked Questions (FAQ)

Q: Can MIC2873YCS-TR directly replace MIC2874YCS-TR? A: Yes. MIC2873YCS-TR is a parametric equivalent with identical supply voltage range (2.7V-5.5V), output current (1.2A flash), package (9-WLCSP 1.3x1.3), and single-wire dimming capability. The switching frequency differs (2MHz vs 4MHz), which may affect component selection for filtering but does not prevent direct substitution in camera flash applications.

Q: What is the key difference between MIC2874YCS-TR and MAX1561ETA+T? A: MAX1561ETA+T has lower switch current (950mA vs 1.2A) but offers analog and PWM dimming options versus single-wire dimming. Supply range is compatible (2.6V-5.5V). The package is larger (8-TDFN 3x3 vs 9-WLCSP 1.3x1.3). MAX1561ETA+T is suitable when dimming flexibility is required and current requirements are lower.

Q: Can LT3518EFE#PBF be used in place of MIC2874YCS-TR? A: LT3518EFE#PBF is functionally compatible but not a direct replacement. It offers dual topology (Buck/Boost), extended supply range (3V-30V), higher current (2.3A), and analog/PWM dimming. The 16-TSSOP-EP package is significantly larger. Use LT3518EFE#PBF when extended supply voltage range or higher current is required.

Q: Is A6213KLJTR-T suitable for camera flash applications? A: A6213KLJTR-T uses step-down (Buck) topology rather than step-up (Boost), making it unsuitable for camera flash applications that require voltage boost from low battery voltages. This part is designed for higher input voltage applications (6V-48V) with PWM dimming and automotive qualification.

Q: Why is RT8476GS listed if it is obsolete? A: RT8476GS is included for reference only to document historical substitution relationships. It should not be selected for new designs due to obsolete status and incomplete electrical specifications (unspecified current output and dimming parameters).

Q: What packaging considerations apply when substituting these parts? A: MIC2874YCS-TR and MIC2873YCS-TR use identical 9-WLCSP (1.3x1.3) packages. MAX1561ETA+T uses 8-TDFN (3x3), LT3518EFE#PBF uses 16-TSSOP-EP, and A6213KLJTR-T uses 8-SOIC-EP. PCB layout and thermal management designs must be adapted for different package footprints and pin configurations.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts (MIC2873YCS-TR, MAX1561ETA+T, LT3518EFE#PBF, A6213KLJTR-T, and RT8476GS) are RoHS3 compliant. MSL ratings vary: MIC2874YCS-TR and MIC2873YCS-TR are MSL 3 (168 hours); MAX1561ETA+T and LT3518EFE#PBF are MSL 1 (unlimited).

Q: Which substitute offers the best inventory availability? A: A6213KLJTR-T has the highest inventory (45,722 units), followed by MAX1561ETA+T (17,600 units) and MIC2873YCS-TR (1,052 units). Availability should be verified with suppliers for current stock levels.

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