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MIC2287-34BML-TR LED Driver IC Equivalent & Substitute Parts
Part Overview
The MIC2287-34BML-TR is a LED Driver IC manufactured by Microchip Technology, classified as a Power Management PMIC. It functions as a 1-output DC DC regulator with Step-Up (Boost) topology, delivering 34V output with 750mA switch current and integrated PWM/Analog dimming capability. The device is designed for backlight and camera flash applications.
This part is discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Technology |
| Part Number | MIC2287-34BML-TR |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| Voltage Supply (Min) | 2.5V |
| Voltage Supply (Max) | 10V |
| Voltage Output | 34V |
| Current Output / Channel | 750mA (Switch) |
| Frequency | 1.2MHz |
| Dimming | Analog, PWM |
| Package / Case | 8-VFDFN Exposed Pad, 8-MLF® |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
| RoHS Status | RoHS non-compliant |
| Product Status | Discontinued at DiGi Electronics |
Substitute Part Grouping Explanation
Substitution logic for the MIC2287-34BML-TR is based on the following critical parameters:
Primary Substitution Criteria (Parametric Equivalents):
- Topology: Step-Up (Boost)
- Voltage Output: 34V
- Current Output / Channel: 750mA (Switch)
- Frequency: 1.2MHz
- Dimming: Analog, PWM
- Package / Case: 8-VFDFN Exposed Pad, 8-MLF®
- Operating Temperature: -40°C ~ 125°C (TJ)
- Supply Voltage Range: 2.5V ~ 10V
Secondary Substitution Criteria (Functional Equivalents):
- Topology: Step-Up (Boost)
- Dimming capability: Analog, PWM, or I2C
- Applications: Backlight, Camera Flash, Lighting
- Package compatibility: Surface Mount
Parametric equivalents maintain identical electrical and mechanical specifications. Functional equivalents provide similar LED driver capability but may differ in output voltage, current rating, or control interface.
Parameter Comparison
| Part Number | Manufacturer | Topology | Voltage Output | Current Output (mA) | Frequency (MHz) | Dimming | Package | Temp Range (°C) | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| MIC2287-34BML-TR | Microchip | Step-Up (Boost) | 34V | 750 | 1.2 | Analog, PWM | 8-MLF® | -40 ~ 125 | Discontinued | RoHS non-compliant |
| MIC2287-24YML-TR | Microchip | Step-Up (Boost) | 24V | 750 | 1.2 | Analog, PWM | 8-MLF® | -40 ~ 125 | Active | ROHS3 Compliant |
| MIC2287-34YML-TR | Microchip | Step-Up (Boost) | 34V | 750 | 1.2 | Analog, PWM | 8-MLF® | -40 ~ 125 | Active | ROHS3 Compliant |
| MIC2289-24YML-TR | Microchip | Step-Up (Boost) | 24V | 750 | 1.2 | Analog, PWM | 8-MLF® | -40 ~ 125 | Active | ROHS3 Compliant |
| MIC2289-34YML-TR | Microchip | Step-Up (Boost) | 34V | 750 | 1.2 | Analog, PWM | 8-MLF® | -40 ~ 125 | Active | ROHS3 Compliant |
| AL8861WT-7 | Diodes Incorporated | Step-Down (Buck) | 36V | 1000 | 1.0 | Analog, PWM | TSOT-23-5 | -40 ~ 85 | Active | ROHS3 Compliant |
| LM3414SD/NOPB | Texas Instruments | Step-Down (Buck) | — | 1000 | 0.5 | Analog, PWM | 8-WSON | -40 ~ 125 | Active | ROHS3 Compliant |
| LM3530UMX-40B/NOPB | Texas Instruments | Step-Up (Boost) | 40V | 30 | 0.5 | PWM | 12-DSBGA | -40 ~ 85 | Active | ROHS3 Compliant |
| LM3555TLE/NOPB | Texas Instruments | Step-Up (Boost) | 9.96V | 500 | 2.0 | I2C | 12-DSBGA | -30 ~ 85 | Active | ROHS3 Compliant |
| LM3555TLX/NOPB | National Semiconductor | Step-Up (Boost) | 9.96V | 500 | 2.0 | I2C | 12-DSBGA | -30 ~ 85 | Active | Not specified |
| LM3556TME/NOPB | Texas Instruments | Step-Up (Boost) | — | 1500 | 4.0 | I2C | 16-DSBGA | -40 ~ 85 | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Parametric Equivalents (Direct Substitution):
MIC2287-34YML-TR is the primary direct substitute. It maintains identical electrical specifications (34V output, 750mA, 1.2MHz, Analog/PWM dimming) and package form factor (8-MLF®). The part is Active status with ROHS3 compliance, addressing the RoHS non-compliance limitation of the original MIC2287-34BML-TR.
MIC2289-34YML-TR provides equivalent electrical performance with identical output voltage, current, frequency, and dimming capability. It is Active status with ROHS3 compliance and higher inventory availability (9200 pcs).
Functional Equivalents (Application-Dependent Substitution):
AL8861WT-7 (Diodes Incorporated) operates as a Step-Down (Buck) topology with 36V output and 1A current capability. It is suitable for applications where input voltage exceeds output voltage requirements. Operating temperature range is limited to -40°C ~ 85°C.
LM3414SD/NOPB (Texas Instruments) is a Step-Down (Buck) LED driver with 1A output current and 500kHz frequency. It supports -40°C ~ 125°C operating range and includes automotive grade certification. Output voltage is not specified in available data.
LM3530UMX-40B/NOPB (Texas Instruments) is a Step-Up (Boost) topology with 40V output capability but limited to 30mA output current. It is suitable for low-current backlight applications only.
LM3555TLE/NOPB and LM3555TLX/NOPB (Texas Instruments / National Semiconductor) are Step-Up (Boost) topologies with I2C dimming interface and 500mA flash current. Output voltage is 9.96V, limiting application to lower voltage LED strings. These parts are optimized for camera flash applications.
LM3556TME/NOPB (Texas Instruments) is a high-current Step-Up (Boost) driver with 1.5A flash current and I2C control. It operates at 4MHz frequency and supports -40°C ~ 85°C temperature range.
Compliance Considerations:
All recommended substitutes except LM3555TLX/NOPB are ROHS3 compliant, addressing regulatory requirements. MIC2287-34YML-TR and MIC2289-34YML-TR maintain Microchip Technology manufacturing continuity with identical package and pinout compatibility.
Frequently Asked Questions (FAQ)
Q: Can MIC2287-34YML-TR directly replace MIC2287-34BML-TR?
A: Yes. MIC2287-34YML-TR is a parametric equivalent with identical electrical specifications (34V output, 750mA, 1.2MHz, Analog/PWM dimming) and package form factor (8-MLF®). The primary difference is product status (Active vs. Discontinued) and RoHS compliance (ROHS3 vs. non-compliant). Pinout and functionality are identical.
Q: What is the difference between MIC2287-34YML-TR and MIC2289-34YML-TR?
A: Both parts are parametric equivalents with identical electrical specifications and package form factor. The primary difference is the base product number (MIC2287 vs. MIC2289). MIC2289-34YML-TR has higher inventory availability (9200 pcs vs. 2400 pcs). Both are Active status with ROHS3 compliance.
Q: Can I use AL8861WT-7 as a substitute?
A: AL8861WT-7 is a functional equivalent with different topology (Step-Down/Buck vs. Step-Up/Boost). It is suitable only if your application can accept a buck converter topology and input voltage exceeds desired output voltage. Output voltage is 36V (vs. 34V) and current is 1A (vs. 750mA). Operating temperature range is -40°C ~ 85°C (vs. -40°C ~ 125°C). Package form factor differs (TSOT-23-5 vs. 8-MLF®).
Q: What are the key differences between Microchip and Texas Instruments LED drivers?
A: Microchip MIC2287/MIC2289 series uses Analog/PWM dimming control, while Texas Instruments LM3555/LM3556 series use I2C digital control. Microchip parts operate at 1.2MHz, while TI parts operate at 2-4MHz. Microchip parts support higher output current (750mA vs. 30-500mA for most TI equivalents). Package form factors differ significantly (8-MLF® vs. 12/16-DSBGA).
Q: Is the 8-MLF® package compatible with other package types?
A: No. The 8-MLF® (8-VFDFN Exposed Pad, 2x2mm) package is specific to Microchip MIC2287/MIC2289 series. Substitutes from other manufacturers use different packages (TSOT-23-5, 8-WSON, 12-DSBGA, 16-DSBGA). PCB layout and footprint modifications are required for cross-manufacturer substitution.
Q: Which substitute has the best temperature range coverage?
A: MIC2287-34YML-TR, MIC2289-34YML-TR, and LM3414SD/NOPB all support -40°C ~ 125°C operating range. This matches the original MIC2287-34BML-TR specification. Other substitutes are limited to -40°C ~ 85°C or -30°C ~ 85°C.
Q: Are all substitutes RoHS compliant?
A: All recommended substitutes are ROHS3 compliant except LM3555TLX/NOPB, which does not specify RoHS status. The original MIC2287-34BML-TR is RoHS non-compliant. MIC2287-34YML-TR and MIC2289-34YML-TR address this compliance gap while maintaining identical functionality.
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