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MIC3263YML-TR LED Driver IC Equivalent & Substitute Parts
Part Overview
The MIC3263YML-TR is a 6-output LED driver IC manufactured by Microchip Technology, functioning as a step-up (boost) DC-DC regulator with PWM dimming capability. This device operates across a 6V to 40V supply range and delivers 30mA per output channel at 1.2MHz switching frequency. The part is classified as Active status with ROHS3 compliance and is designed for backlight applications requiring regulated LED current delivery.
Substitute parts are identified when equivalent functional performance can be achieved through alternative manufacturers while maintaining core electrical and mechanical compatibility within the LED driver IC category.
Substiute Parts
Key Parameters
| Parameter | MIC3263YML-TR |
|---|---|
| Manufacturer | Microchip Technology |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| Number of Outputs | 6 |
| Voltage Supply (Min) | 6V |
| Voltage Supply (Max) | 40V |
| Current per Output Channel | 30mA |
| Switching Frequency | 1.2MHz |
| Dimming Control | PWM |
| Package Type | 24-MLF® (4x4) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 2 (1 Year) |
| Part Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the MIC3263YML-TR are classified based on the following core electrical and mechanical parameters:
Primary Substitution Criteria:
- Topology: Step-Up (Boost) DC-DC Regulator
- Number of Outputs: 6 outputs (primary criterion) or 5 outputs (functional alternative)
- Dimming Control: PWM capability
- Internal Switch: Present
- Application: Backlight LED driver
- Mounting: Surface Mount
Secondary Compatibility Parameters:
- Supply voltage range overlap with 6V-40V specification
- Output current capability per channel (30mA baseline)
- Package form factor compatibility (24-pin or equivalent pin count)
- Operating temperature range coverage
- RoHS3 compliance
Substitutes are grouped into two categories:
Category A - Direct Functional Equivalents (6 Outputs, PWM Dimming): Parts maintaining 6-output configuration with PWM dimming control and compatible supply voltage ranges.
Category B - Functional Alternatives (5 Outputs or Enhanced Specifications): Parts with reduced output count (5 outputs) or enhanced current capability that serve equivalent applications with design flexibility.
Parameter Comparison
| Parameter | MIC3263YML-TR | MP3387LGRT-P | ISL78171ARZ-T7A | LP8556SQ-E09/NOPB | LP8556TMX-E06/NOPB | TPS61180RTER | LP8557AYFQT |
|---|---|---|---|---|---|---|---|
| Manufacturer | Microchip | Monolithic Power Systems | Renesas Electronics | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Outputs | 6 | 6 | 6 | 6 | 5 | 6 | 6 |
| Topology | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) |
| Voltage Supply Min | 6V | 3V | 4.5V | 2.7V | 2.7V | 5V | 2.7V |
| Voltage Supply Max | 40V | 25V | 26.5V | 20V | 20V | 24V | 5.5V |
| Current per Channel | 30mA | 45mA | 50mA | 50mA | 50mA | 25mA | 25mA |
| Switching Frequency | 1.2MHz | 1.25MHz | 600kHz, 1.2MHz | 312kHz, 625kHz, 1250kHz | 312kHz, 625kHz, 1250kHz | 1MHz | 500kHz, 1MHz |
| Dimming Control | PWM | Analog, PWM | Analog, I2C, PWM | PWM | PWM | PWM | PWM |
| Operating Temp Range | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 105°C (TA) | -30°C ~ 85°C (TA) | -30°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -30°C ~ 85°C (TA) |
| Package Type | 24-MLF® (4x4) | 24-TQFN (4x4) | 20-QFN (3x4) | 24-WQFN (4x4) | 20-DSBGA (2.04x1.78) | 16-WQFN (3x3) | 16-DSBGA |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Part Status | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
MP3387LGRT-P (Monolithic Power Systems)
This part maintains 6-output configuration with PWM dimming and operates across 3V to 25V supply range. Current capability is 45mA per channel, exceeding the MIC3263YML-TR specification. Operating temperature extends to -40°C to 125°C (TJ), matching the main part. Package is 24-TQFN (4x4), mechanically compatible with 24-pin footprints. RoHS3 compliance and Active status confirm production availability. Selection is appropriate for applications requiring higher output current within the same thermal operating window.
ISL78171ARZ-T7A (Renesas Electronics Corporation)
This part provides 6-output configuration with enhanced dimming control (Analog, I2C, PWM). Supply range is 4.5V to 26.5V with 50mA per channel output current. Operating temperature is -40°C to 105°C (TA). Package is 20-QFN (3x4), requiring PCB layout adjustment from the 24-pin baseline. Automotive qualification (AEC-Q100) and MSL 1 rating indicate enhanced reliability. Selection is appropriate for automotive-grade applications or designs requiring I2C control capability.
LP8556SQ-E09/NOPB (Texas Instruments)
This part maintains 6-output configuration with PWM dimming across 2.7V to 20V supply range. Output current is 50mA per channel. Operating temperature is -30°C to 85°C (TA), representing reduced upper temperature limit compared to the main part. Package is 24-WQFN (4x4), footprint-compatible with the MIC3263YML-TR. Frequency selection capability (312kHz, 625kHz, 1250kHz) provides design flexibility. Selection is appropriate for consumer-grade applications within standard temperature ranges.
LP8556TMX-E06/NOPB (Texas Instruments)
This part provides 5-output configuration (reduced from 6) with PWM dimming across 2.7V to 20V supply range. Output current is 50mA per channel. Operating temperature is -30°C to 85°C (TA). Package is 20-DSBGA (2.04x1.78), requiring different PCB layout. Frequency selection capability matches LP8556SQ-E09/NOPB. Selection is appropriate for space-constrained designs where 5-output functionality is acceptable.
TPS61180RTER (Texas Instruments)
This part maintains 6-output configuration with PWM dimming across 5V to 24V supply range. Output current is 25mA per channel, matching the MIC3263YML-TR specification. Operating temperature is -40°C to 85°C (TA). Package is 16-WQFN (3x3), representing significant footprint reduction. MSL 2 rating matches the main part. Selection is appropriate for space-constrained applications where 25mA output current is sufficient.
LP8557AYFQT (Texas Instruments)
This part maintains 6-output configuration with PWM dimming across 2.7V to 5.5V supply range. Output current is 25mA per channel. Operating temperature is -30°C to 85°C (TA). Package is 16-DSBGA, providing compact form factor. Selection is appropriate only for low-voltage applications (below 5.5V maximum supply), not suitable for the 6V-40V range of the MIC3263YML-TR.
LP8556TMX-E03/NOPB (Texas Instruments)
This part provides 5-output configuration with PWM dimming across 2.7V to 20V supply range. Output current is 50mA per channel. Operating temperature is -30°C to 85°C (TA). Package is 20-DSBGA (2.04x1.78). Selection is appropriate for applications where 5-output functionality is acceptable and space constraints favor BGA packaging.
LP8552TLE-E04/NOPB (Texas Instruments)
This part maintains 6-output configuration with PWM dimming across 2.7V to 22V supply range. Output current is 450mA per channel, significantly exceeding the MIC3263YML-TR specification. Operating temperature is -40°C to 85°C (TA). Package is 25-DSBGA. Selection is appropriate for high-current LED driver applications requiring substantially greater output current capability.
Frequently Asked Questions (FAQ)
Q1: Can LP8557AYFQT substitute for MIC3263YML-TR in all applications?
No. The LP8557AYFQT maximum supply voltage is 5.5V, while the MIC3263YML-TR operates to 40V. This part is suitable only for applications with supply voltages below 5.5V. For applications requiring the full 6V-40V range, alternative substitutes must be selected.
Q2: What is the primary difference between 6-output and 5-output LED driver configurations?
The number of outputs determines the maximum number of independent LED strings that can be driven simultaneously. The MIC3263YML-TR supports 6 independent LED channels. Substitutes with 5-output configuration (LP8556TMX-E06/NOPB, LP8556TMX-E03/NOPB) reduce the maximum number of controllable LED strings by one. Selection depends on whether the application design requires all 6 channels or can function with 5.
Q3: How do package differences affect PCB design when substituting parts?
The MIC3263YML-TR uses 24-MLF® (4x4) packaging. Substitutes employ different packages: 24-TQFN (MP3387LGRT-P), 20-QFN (ISL78171ARZ-T7A), 24-WQFN (LP8556SQ-E09/NOPB), 20-DSBGA (LP8556TMX-E06/NOPB, LP8556TMX-E03/NOPB), 16-WQFN (TPS61180RTER), 16-DSBGA (LP8557AYFQT), and 25-DSBGA (LP8552TLE-E04/NOPB). Each package requires distinct PCB footprint, trace routing, and thermal management considerations. Direct pin-to-pin substitution is not possible without PCB redesign.
Q4: Which substitute provides the closest thermal operating range to the MIC3263YML-TR?
The MIC3263YML-TR operates -40°C to 125°C (TJ). MP3387LGRT-P matches this range exactly (-40°C to 125°C TJ). ISL78171ARZ-T7A extends to -40°C but limits to 105°C (TA). All Texas Instruments substitutes limit to -40°C or -30°C minimum and 85°C maximum. For applications requiring the full -40°C to 125°C range, MP3387LGRT-P is the only substitute maintaining identical thermal specifications.
Q5: What does MSL (Moisture Sensitivity Level) rating indicate for component substitution?
MSL rating defines moisture exposure limits during storage and handling. The MIC3263YML-TR carries MSL 2 (1 Year), requiring controlled storage conditions. Most Texas Instruments substitutes carry MSL 1 (Unlimited), indicating superior moisture tolerance and reduced storage constraints. ISL78171ARZ-T7A also carries MSL 1. MP3387LGRT-P carries MSL 1. Lower MSL ratings provide manufacturing flexibility and reduced risk of moisture-induced failures during extended storage.
Q6: How do output current specifications affect LED string design?
The MIC3263YML-TR delivers 30mA per output channel. Substitutes vary: MP3387LGRT-P (45mA), ISL78171ARZ-T7A (50mA), LP8556 series (50mA), TPS61180RTER (25mA), LP8557AYFQT (25mA), LP8552TLE-E04/NOPB (450mA). Higher current capability allows driving brighter LED strings or multiple LEDs in parallel per channel. Lower current capability (25mA) restricts LED brightness or requires series-only configurations. Selection must match the LED current requirements of the target application.
Q7: What is the significance of frequency selection capability in LED driver substitutes?
The MIC3263YML-TR operates at fixed 1.2MHz. Several Texas Instruments substitutes offer selectable frequencies: LP8556 series (312kHz, 625kHz, 1250kHz), ISL78171ARZ-T7A (600kHz, 1.2MHz), LP8557AYFQT (500kHz, 1MHz). Frequency selection affects switching noise, EMI characteristics, and component size requirements. Lower frequencies reduce EMI but increase inductor size. Higher frequencies reduce component size but increase switching losses. Application requirements determine optimal frequency selection.
Q8: Are all listed substitutes suitable for automotive applications?
Only ISL78171ARZ-T7A carries explicit automotive qualification (AEC-Q100). Other parts are classified as commercial-grade. For automotive applications requiring AEC-Q100 compliance, ISL78171ARZ-T7A is the only qualified substitute. Commercial-grade substitutes may be acceptable for non-automotive consumer applications.
Q9: What does RoHS3 compliance indicate for all listed parts?
RoHS3 compliance confirms that all parts meet Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All listed parts (main part and substitutes) carry ROHS3 compliance, confirming environmental and regulatory compatibility across the entire substitute list.
Q10: Can LP8552TLE-E04/NOPB be used in place of MIC3263YML-TR for standard backlight applications?
LP8552TLE-E04/NOPB provides 450mA per channel output current, approximately 15 times greater than the MIC3263YML-TR specification. While functionally capable of driving LED backlight applications, this part is designed for high-current LED driver applications. Use in standard backlight circuits would result in over-specification and unnecessary cost. Selection should match application current requirements: use LP8552TLE-E04/NOPB only for high-brightness or multi-LED-string applications requiring 450mA capability.
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