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Microchip Technology MIC2287BD5-TR
- Part No.:
- MIC2287BD5-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC2287BD5-TR.pdf
- Description:
- IC LED DRVR RGLTR PWM TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,303
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Product details
Overview
MIC2287BD5-TR from Micrel is a 1.2MHz PWM white LED driver IC optimized for constant-current backlighting in portable devices. It features a 2.5V–10V input range, 34V max output voltage, >500mA switch current, 95mV feedback reference, and operates in Thin SOT-23-5 package. It drives up to 3-series white LEDs in cell phones and PDAs with uniform brightness and minimal external components.
For engineers reviewing the MIC2287BD5-TR datasheet, MIC2287BD5-TR pinout, MIC2287BD5-TR application, or MIC2287BD5-TR equivalent, key selection criteria include its 1.2MHz fixed-frequency boost topology, 95mV low-drop feedback for efficiency, OVP implementation via external Zener, shutdown current <1µA, and –40°C to +125°C junction temperature rating.
Technical Context
The MIC2287BD5-TR implements a constant-frequency, current-mode PWM boost regulator using an internal bipolar transistor switch and gm error amplifier. Its 1.2MHz oscillator enables compact external inductor (e.g., 10µH) and capacitor (e.g., 0.22µF) selection while minimizing input ripple and EMI.
It uses a 95mV feedback reference to set LED current via external resistor (ILED = 95mV/RFB), supports PWM dimming via EN pin, and includes UVLO (2.1V typ), over-temperature shutdown (150°C), and <1% line/load regulation - all within a 5-pin Thin SOT-23 package without integrated OVP pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 10V - supports single-cell Li-ion (3.0–4.2V) and multi-cell alkaline/NiMH inputs. |
| Switching Frequency | 1.2 MHz (typ) - enables use of small 10µH inductors and 0.22µF ceramic output capacitors. |
| Feedback Voltage | 95 mV (±5%) - minimizes power loss in current-sense resistor and improves battery runtime. |
| Switch Current Limit | 750 mA (min) - supports >500mA continuous switch current for driving 3-series white LEDs at 20mA. |
| Shutdown Current | 0.1 µA (typ) - ensures ultra-low quiescent drain during display-off states in portable systems. |
| Operating Temp Range | –40°C to +125°C - qualified for industrial and automotive cabin-adjacent backlight applications. |
| UVLO Threshold | 2.1 V (typ) - prevents erratic startup below usable battery voltage, improving system reliability. |
Pinout & Package
Package: Thin SOT-23-5 (3.0mm × 1.7mm × 0.95mm height), thermally enhanced with exposed pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SW | Switch node | Collector of internal bipolar transistor; connects to inductor and output diode anode. |
| 2 - GND | Ground return | Power and signal ground reference; ties to PCB ground plane and exposed pad. |
| 3 - FB | Feedback input | Senses LED cathode voltage; sets current via external resistor to GND (ILED = 95mV/RFB). |
| 4 - EN | Enable control | Active-high logic input; drives PWM dimming or full on/off control with <1µA leakage when low. |
| 5 - VIN | Supply input | Primary power input (2.5–10V); powers internal circuitry and bias network. |
Key Features
| Feature | Design Value |
|---|---|
| 1.2MHz fixed-frequency PWM | Reduces EMI and enables miniaturized magnetics/capacitors without compromising regulation stability. |
| 95mV feedback reference | Lowers I²R loss in current-sense resistor by ~8× vs. typical 0.8V references, extending battery life. |
| PWM dimming via EN pin | Supports 100Hz–10kHz external PWM signals for flicker-free, high-efficiency brightness control. |
| UVLO and thermal shutdown | Prevents operation outside safe voltage/temperature limits, protecting IC and LEDs during fault conditions. |
| Low shutdown current | 0.1µA typical shutdown current enables long standby time in always-on portable displays. |
Applications
| Cell Phone Backlight | PDA Display Driver |
|---|---|
Use Scenario: Driving 3-series white LEDs for main LCD backlight in GSM/UMTS handsets with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED string current at 15–20mA with 1.2MHz switching. Use Value: Uniform brightness across display, <1% load regulation, and 82% typical efficiency at 3.6V input/10mA output. | Use Scenario: Powering QVGA TFT backlight in enterprise PDAs requiring extended battery life and low thermal footprint. IC Role / Device Role / Timing Role: High-frequency PWM LED driver enabling compact layout and minimal board area for passive components. Use Value: 10µH inductor + 0.22µF ceramic capacitor solution reduces BOM cost and PCB space vs. lower-frequency alternatives. |
| Digital Camera LCD Backlight | IP Phone Display Illumination |
Use Scenario: Backlighting small color LCDs in compact digital cameras where burst-mode flash coexists with display operation. IC Role / Device Role / Timing Role: Efficient current source with fast enable/disable response (<10µs startup) for on-demand illumination. Use Value: <1µA shutdown current preserves battery between photo sessions; 95mV FB enables precise current matching across LED strings. | Use Scenario: Illuminating monochrome or color LCDs in VoIP desk phones powered from PoE or wall adapters. IC Role / Device Role / Timing Role: Robust LED driver supporting wide input (5–10V) and operating reliably across industrial temperature range. Use Value: –40°C to +125°C junction rating ensures stable performance in uncontrolled office environments and near heat-generating Ethernet PHYs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1910EUT+T | 2.5–5.5V input, 40V max output, 1.2MHz, 900mA switch current, 1.25V FB reference | Higher FB voltage increases sense resistor power loss; better suited for higher-output-voltage (>20V) LED strings | Select when driving ≥5-series LEDs or needing higher switch current headroom |
| TPS61160DRVR | 2.7–5.5V input, 28V max output, 1.2MHz, 400mA switch current, 200mV FB reference | Lower max output voltage and switch current; no OVP option; requires external Zener for open-circuit protection | Select for cost-sensitive designs with ≤4-series LEDs and tighter input voltage constraints |
Compared with MIC2287BD5-TR, MAX1910EUT+T offers higher switch current but less efficient 1.25V feedback, while TPS61160DRVR provides similar frequency and package but reduced output capability and no integrated thermal protection - making MIC2287BD5-TR optimal for 3-series LED backlighting with thermal robustness and ultra-low quiescent current.
Availability
MIC2287BD5-TR is available at Aetrix Electronics and suitable for cell phone backlighting, PDA display drivers, and digital camera LCD illumination requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC2287BD5-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 analog and mixed-signal semiconductor company acquired by Microchip Technology in 2015, known for high-performance power management and timing solutions.
The MIC2287 product line was designed specifically for compact, high-efficiency white LED backlighting in battery-powered portable electronics - emphasizing low IQ, small external components, and robust thermal performance in thin packages.
FAQ
What is the maximum number of white LEDs the MIC2287BD5-TR can drive in series?
The MIC2287BD5-TR supports up to 3-series white LEDs in standard configurations, based on its 34V maximum output voltage and typical forward voltage of ~3.2V per LED. Driving more than 3 LEDs requires verifying total VF sum stays below 34V under worst-case temperature and aging conditions. The MIC2287BD5-TR datasheet confirms 3-series operation in its typical application schematic and efficiency curves.
Does the MIC2287BD5-TR include built-in overvoltage protection (OVP)?
No, the MIC2287BD5-TR in Thin SOT-23-5 package does not include a dedicated OVP pin. OVP must be implemented externally using a Zener diode from the output to the FB pin, as shown in Figure 4 of the MIC2287BD5-TR datasheet. The 8-lead MLF™ variants (e.g., MIC2287-34BML) integrate OVP with selectable thresholds (15V/24V/34V), but MIC2287BD5-TR relies on discrete protection.
What is the recommended inductor value for a 3-series white LED application with MIC2287BD5-TR?
The MIC2287BD5-TR datasheet recommends a 10µH inductor for 3-series white LED operation, paired with a 0.22µF output capacitor and 1µF input capacitor. Example part numbers include Murata LQH43MN100K21 or TDK NLC453232T-100K. This value balances efficiency (>82% at 3.6V/20mA), peak switch current margin, and physical size in portable designs.
Can the MIC2287BD5-TR be used with PWM dimming, and what frequency range is supported?
Yes, the MIC2287BD5-TR supports PWM dimming via its EN pin, accepting external logic-level PWM signals from 100Hz to 10kHz. At frequencies above 1kHz, visible flicker is eliminated; the IC responds with fast turn-on/turn-off (<10µs), maintaining LED current accuracy across duty cycles. The MIC2287BD5-TR's <1µA shutdown current ensures minimal power loss during off periods.
What is the thermal resistance (θJA) of the MIC2287BD5-TR in its Thin SOT-23-5 package?
According to the MIC2287BD5-TR datasheet, the junction-to-ambient thermal resistance (θJA) for the Thin SOT-23-5 package is 256°C/W under standard JEDEC test conditions. Effective thermal performance requires proper PCB copper pour connected to the exposed GND pad; adding 100mm² of 2oz copper can reduce θJA by ~30–40°C/W in real layouts.
MIC2287BD5-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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, Camera Flash
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MIC2287BD5-TR FAQ
1.How can I place an order for MIC2287BD5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2287BD5-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 MIC2287BD5-TR reliable?
The price and inventory of MIC2287BD5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2287BD5-TR is usually 5 days.
3.What payment methods are accepted for MIC2287BD5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2287BD5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2287BD5-TR?
MIC2287BD5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2287BD5-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 MIC2287BD5-TR?
For technical support, including MIC2287BD5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2287BD5-TR requirements.
6.How does Aetrix verify that MIC2287BD5-TR is sourced from the original manufacturer or authorized distributors?
All MIC2287BD5-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 MIC2287BD5-TR meets industry standards.
7.What is the process for return or replacement of MIC2287BD5-TR?
All MIC2287BD5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2287BD5-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 MIC2287BD5-TR part is unused and in its original packaging.
Return procedure for MIC2287BD5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2287BD5-TR Tags
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