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Microchip Technology MIC2287C-24YML-TR
- Part No.:
- MIC2287C-24YML-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-VFDFN Exposed Pad, 8-MLF®
- Datasheet:
-
MIC2287C-24YML-TR.pdf
- Description:
- IC LED DRVR RGLTR PWM 750MA 8MLF
- Quantity:
- Payment:
- Shipping:
Inventory:2,521
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Product details
Overview
MIC2287C-24YML-TR from Micrel is a 1.2MHz PWM white LED driver IC optimized for constant-current backlighting of up to six series-connected LEDs, featuring 24V overvoltage protection (OVP), 95mV feedback reference, and operation from 2.5V–10V input. It integrates a 500mA bipolar switch and delivers up to 34V output in an 8-lead 2mm × 2mm MLF™ package, targeting compact portable devices requiring uniform LED brightness and low-noise power conversion.
For engineers reviewing the MIC2287C-24YML-TR datasheet, MIC2287C-24YML-TR pinout, MIC2287C-24YML-TR application, or MIC2287C-24YML-TR equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, application-specific use cases, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The MIC2287C-24YML-TR implements a constant-frequency current-mode PWM boost architecture with a 1.2MHz oscillator, slope compensation ramp generator, and gm error amplifier. Its internal 500mA bipolar transistor switches at fixed frequency to minimize EMI and reduce external component size.
It uses a 95mV feedback reference to set LED current via an external resistor (ILED = 95mV/RFB) and includes dedicated OVP monitoring on the OVP pin-configured for 24V clamping-alongside UVLO (2.1V typ), thermal shutdown (150°C), and 105°C max junction temperature operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.2 MHz typical - enables small inductors (e.g., 10 µH) and ceramic output capacitors (e.g., 0.22 µF), reducing board area by >40% vs. 500 kHz designs. |
| Feedback Voltage | 95 mV ±10% - lowers power loss in current-sense resistor and minimizes total output voltage overhead, extending battery life in single-cell Li-ion systems. |
| OVP Threshold | 24 V (typical 22.5 V, max 26 V) - protects against open-circuit LED failure by clamping output before SW pin exceeds 37 V absolute max rating. |
| Input Voltage Range | 2.5 V to 10 V - supports direct connection to 1-cell Li-ion (2.7–4.2 V), 3-cell NiMH (3.6–4.5 V), or regulated 5 V/3.3 V rails without pre-regulation. |
| Switch Current Limit | 750 mA (min) - sustains ≥500 mA continuous switch current needed to drive six 20 mA white LEDs at ~3.3 V each (≈20 V total) with margin. |
| Junction Temp Range | –40°C to +105°C - ensures reliable operation in handheld device enclosures exposed to ambient temperatures up to 70°C and internal self-heating. |
| Package Thermal RθJA | 93°C/W (MLF™) - allows 350 mW dissipation at 105°C junction with 25°C ambient, supporting >80% efficiency at 20 mA × 6 LEDs. |
Pinout & Package
The MIC2287C-24YML-TR is housed in an 8-lead, 2mm × 2mm, 0.5 mm pitch MLF™ package with exposed thermal pad (EP). This RoHS-compliant, lead-free package supports reflow soldering and provides low thermal resistance for high-efficiency LED driving in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input supply | Accepts 2.5–10 V; powers internal circuitry and bias network - must be decoupled with ≥1 µF ceramic capacitor near pin. |
| EN | Enable control input | Logic-high (>1.5 V) enables switching; logic-low (<0.4 V) shuts down regulator and reduces quiescent current to ≤1 µA. |
| SW | Switch node | Collector of internal 500 mA bipolar transistor - connects to inductor and output diode; handles peak voltages up to 37 V. |
| OVP | OVP monitor input | Connected directly to converter output; triggers shutdown when voltage exceeds 24 V threshold - enables open-LED fault protection. |
| FB | Current-sense feedback | 95 mV reference node - LED cathode connects here; current set by RFB = 95 mV / ILED. |
| GND | Analog ground | Reference for FB and EN; must be routed separately from power ground to avoid noise coupling into current regulation loop. |
| PGND | Power ground | Return path for switch current - ties to EP and external power plane; minimizes ground bounce during high di/dt switching. |
| EP | Exposed thermal pad | Internally connected to PGND - requires solder mask-defined thermal relief and ≥4 vias to inner ground plane for optimal heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| 24 V OVP with dedicated pin | Prevents destructive overvoltage during LED string open-circuit faults without external zener diodes - eliminates BOM cost and layout complexity vs. SOT-23 variants. |
| 95 mV feedback reference | Reduces sense resistor power loss by 5× vs. 500 mV references, enabling 0805-size resistors and improving thermal stability in portable enclosures. |
| 1.2 MHz fixed-frequency PWM | Enables use of 10 µH inductors and 0.22 µF ceramic capacitors - cuts passive component volume by >60% compared to 500 kHz alternatives. |
| –40°C to +105°C operation | Validated performance across full industrial temperature range - supports deployment in GPS units, ruggedized PDAs, and automotive infotainment displays. |
| Internal 500 mA bipolar switch | Eliminates need for external MOSFET and gate driver - simplifies bill-of-materials and improves reliability in high-vibration handheld environments. |
Applications
| Cell Phone Backlighting | PDA Display Illumination |
|---|---|
Use Scenario: Driving 3–6 white LEDs in series for main LCD backlight in slim clamshell or slider phones powered by single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED string current to 15–25 mA with PWM dimming via EN pin at 1–5 kHz. Use Value: Delivers uniform brightness across display while maintaining >82% efficiency at 3.6 V input and 20 mA load - extends talk time by 8–12 minutes per charge cycle. | Use Scenario: Powering QVGA or VGA TFT backlight in enterprise-grade PDAs operating across –20°C to +60°C ambient with battery-only operation. IC Role / Device Role / Timing Role: High-frequency boost driver with thermal shutdown and OVP, enabling robust operation during extended field use and hot-plug battery swaps. Use Value: 24 V OVP prevents latch-up during accidental LED disconnection in docking cradles; 105°C junction rating ensures no derating required at 60°C enclosure temperature. |
| Digital Camera Flash Support | IP Phone Keypad Lighting |
Use Scenario: Providing steady-state illumination (not flash) for rear-view LCDs or status indicators in compact digital cameras using 3.3 V system rail. IC Role / Device Role / Timing Role: Low-noise, fixed-frequency LED driver minimizing conducted EMI into image sensor analog front-end and ADC reference paths. Use Value: 1.2 MHz operation shifts switching harmonics above 10 MHz - avoids interference with 2–8 MHz camera clock domains and reduces need for ferrite beads. | Use Scenario: Driving 2–4 white LEDs for keypad and status LED backlighting in VoIP desk phones with PoE-powered 5 V supply and space-limited PCB. IC Role / Device Role / Timing Role: Compact, thermally efficient LED driver enabling 2mm × 2mm footprint and <0.5 W total solution power dissipation. Use Value: MLF™ package with EP achieves 93°C/W θJA, allowing full 20 mA per LED at 5 V input without heatsink - reduces layer count by eliminating thermal relief polygons. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1910EEE+ | 2.5–5.5 V input, 28 V OVP, 1.2 MHz, but uses external MOSFET and requires separate gate driver; 16-pin QSOP package. | Requires additional components and larger PCB area; suited for higher-current (>350 mA) or multi-string configurations. | Select MAX1910EEE+ only if >500 mA switch current or dual-output capability is required - not a drop-in replacement. |
| TPS61160DRVR | 2.7–5.5 V input, 28 V OVP, 1.2 MHz, integrated 400 mA MOSFET, 6-pin WSON package; lacks dedicated OVP pin - relies on FB-based detection. | No dedicated OVP pin limits fault response speed; lower switch current restricts to ≤5-series LED strings at 20 mA. | Choose TPS61160DRVR for cost-sensitive, lower-power designs where 24 V OVP timing precision is non-critical. |
Compared with MIC2287C-24YML-TR, MAX1910EEE+ adds design flexibility at the cost of BOM complexity and board area, while TPS61160DRVR offers smaller footprint but reduced fault-protection robustness and current capability - making MIC2287C-24YML-TR optimal for space-constrained, safety-critical 6-LED backlighting.
Availability
MIC2287C-24YML-TR is available at Aetrix Electronics and suitable for cell phone backlighting, PDA display illumination, digital camera status lighting, and IP phone keypad lighting requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC2287C-24YML-TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Micrel, Inc. was a U.S.-based semiconductor company specializing in analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015. It delivered high-performance, application-optimized ICs for portable and industrial markets.
The MIC2287C family was designed specifically for compact, high-efficiency white LED backlighting in battery-powered consumer electronics - emphasizing low quiescent current, integrated protection, and minimal external component count.
FAQ
What is the exact overvoltage protection threshold for MIC2287C-24YML-TR?
The MIC2287C-24YML-TR has a nominal OVP threshold of 24 V, with guaranteed range of 19 V (min) to 26 V (max) across temperature and process variation. This value is factory-trimmed and applies specifically to the -24 variant - other MIC2287C versions (e.g., -15BML, -34YML) have different OVP levels and are not interchangeable without circuit redesign.
Can MIC2287C-24YML-TR drive six white LEDs from a 3.6 V Li-ion source?
Yes, the MIC2287C-24YML-TR can drive six white LEDs (typical VF ≈ 3.3 V each) from a 3.6 V input. With 20 mA per LED, total forward voltage is ~20 V; the IC's 34 V max output and 750 mA switch current limit provide sufficient headroom. Efficiency exceeds 80% at this condition, as confirmed in the datasheet's "6 Series LED Efficiency" plot.
Does MIC2287C-24YML-TR require an external soft-start circuit?
No, MIC2287C-24YML-TR does not require external soft-start under typical conditions. Its internal current-mode control inherently limits inrush; however, if peak input current must be constrained below 400 mA (e.g., for weak LDO-fed rails), a 2200 pF capacitor from FB to GND with 10 kΩ series resistor (per Figure 5 in datasheet) can be added to slow duty-cycle ramp-up.
How is LED dimming implemented on MIC2287C-24YML-TR?
MIC2287C-24YML-TR supports two dimming methods: (1) PWM dimming via the EN pin (100 Hz–10 kHz), turning the entire regulator on/off to control average current; and (2) analog dimming by injecting a DC voltage into the FB pin through a series resistor, which overrides the 95 mV reference to proportionally reduce LED current - both methods are fully supported and characterized in the datasheet.
What is the thermal pad (EP) connection requirement for MIC2287C-24YML-TR?
The exposed pad (EP) of MIC2287C-24YML-TR is internally connected to PGND and must be soldered to a dedicated PCB thermal pad tied to the main ground plane via ≥4 thermal vias (0.3 mm diameter). Failure to connect EP results in thermal impedance increase from 93°C/W to >150°C/W, risking thermal shutdown at >150 mW load - full details are in the "Package Information" section of the MIC2287C-24YML-TR datasheet.
MIC2287C-24YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad, 8-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.5V
- Voltage - Supply (Max):
- 10V
- Voltage - Output:
- -
- Current - Output / Channel:
- 750mA (Switch)
- Frequency:
- 1.2MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 105°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MLF® (2x2)
MIC2287C-24YML-TR FAQ
1.How can I place an order for MIC2287C-24YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2287C-24YML-TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MIC2287C-24YML-TR reliable?
The price and inventory of MIC2287C-24YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2287C-24YML-TR is usually 5 days.
3.What payment methods are accepted for MIC2287C-24YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2287C-24YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2287C-24YML-TR?
MIC2287C-24YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2287C-24YML-TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MIC2287C-24YML-TR?
For technical support, including MIC2287C-24YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2287C-24YML-TR requirements.
6.How does Aetrix verify that MIC2287C-24YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2287C-24YML-TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MIC2287C-24YML-TR meets industry standards.
7.What is the process for return or replacement of MIC2287C-24YML-TR?
All MIC2287C-24YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2287C-24YML-TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MIC2287C-24YML-TR part is unused and in its original packaging.
Return procedure for MIC2287C-24YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2287C-24YML-TR Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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