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Microchip Technology MIC2287CBD5
- Part No.:
- MIC2287CBD5
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC2287CBD5.pdf
- Description:
- IC LED DRVR RGLTR PWM TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,412
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Product details
Overview
MIC2287CBD5 from Micrel is a 1.2MHz PWM white LED driver IC optimized for constant-current backlighting in portable devices. It operates from 2.5V to 10V input, delivers up to 34V output, supports >500mA switch current, features 95mV feedback voltage, and integrates overvoltage protection (OVP) - enabling reliable 3-series white LED driving in cell phones and digital cameras.
For engineers reviewing the MIC2287CBD5 datasheet, MIC2287CBD5 pinout, MIC2287CBD5 application, or MIC2287CBD5 equivalent, this device requires attention to its Thin SOT-23-5 package constraints, absence of dedicated OVP pin, thermal limits (–40°C to +105°C), and 95mV FB-based current-setting resistor calculation for precise LED brightness control.
Technical Context
The MIC2287CBD5 implements a constant-frequency, current-mode PWM boost regulator architecture with an internal 500mA bipolar switch and slope-compensated current-loop control. Its 1.2MHz oscillator enables compact external components (e.g., 10µH inductor, 0.22µF output capacitor) while minimizing input ripple and EMI.
It uses a gm error amplifier referenced to 95mV on the FB pin to regulate LED current via an external sense resistor, and includes UVLO (2.1V typ), thermal shutdown (150°C), and shutdown current <1µA. The Thin SOT-23-5 package lacks dedicated OVP pin - external zener clamping from output to FB is required for open-circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 10V - compatible with single-cell Li-ion (3.0–4.2V) and multi-cell alkaline/NiMH sources. |
| Switching Frequency | 1.2MHz (typ) - enables use of small 10µH inductors and 0.22µF ceramic capacitors, reducing board area. |
| Feedback Voltage | 95mV ±10% - sets LED current as ILED = 95mV / RFB, minimizing power loss in current-sense resistor. |
| Max Switch Current | 750mA (min) - supports ≥3-series white LEDs at 20mA each with margin for transient loads. |
| Oscillator Accuracy | ±12.5% over temperature - ensures stable PWM timing without external clock source. |
| Junction Temp Range | –40°C to +105°C - validated for operation in handheld consumer electronics under battery discharge heat. |
| Quiescent Current | 2.5mA (typ) at no load - balances low standby power with fast enable response for display backlight control. |
Pinout & Package
Package: Thin SOT-23-5 (3.0mm × 1.7mm × 1.0mm height), Pb-free standard finish, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Supply input | Power for internal circuitry (2.5–10V); must be decoupled near pin with ≥1µF ceramic capacitor. |
| 2 - EN | Enable control | Logic-high (>1.5V) enables switching; logic-low (<0.4V) disables regulator and reduces supply current to <1µA. |
| 3 - SW | Switch node | Collector of internal bipolar transistor; connects to inductor and Schottky diode anode - high dv/dt node requiring tight layout. |
| 4 - FB | Current-sense feedback | Connects to LED cathode and RFB to ground; regulates LED current via 95mV reference - also used for external OVP zener clamp. |
| 5 - GND | Ground return | Common analog and power ground; must be low-impedance connection to minimize noise coupling into FB path. |
Key Features
| Feature | Design Value |
|---|---|
| 1.2MHz fixed-frequency PWM | Enables miniaturized magnetics and capacitors; avoids audible noise and simplifies EMI filtering vs. variable-frequency topologies. |
| 95mV precision feedback reference | Reduces power dissipation in RFB by >5× versus 1.25V references, improving efficiency and thermal performance in space-constrained designs. |
| Integrated bipolar switch (750mA min) | Eliminates need for external MOSFET or BJT; supports direct drive of 3–4 white LEDs in series without external current amplification. |
| UVLO and thermal shutdown | Prevents malfunction during brown-out (2.1V threshold) and protects against sustained overload or poor heatsinking (150°C trip). |
| Low-profile Thin SOT-23-5 package | 0.95mm max height allows integration into ultra-thin mobile devices; footprint compatible with standard SOT-23 pick-and-place equipment. |
Applications
| Cell Phone Backlight | Digital Camera LCD Backlight |
|---|---|
Use Scenario: Driving 3-series white LEDs behind a 2.4-inch TFT LCD in a GSM smartphone powered by a single Li-ion cell. IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED string current at 20mA with PWM dimming via EN pin at 1kHz. Use Value: Achieves uniform brightness across display while maintaining >82% efficiency at 3.6V input and 9.6V output - extending battery runtime. |
Use Scenario: Powering 4-series white LEDs for a 3.0-inch viewfinder LCD in a compact digital camera with burst-mode flash capability. IC Role / Device Role / Timing Role: High-frequency (1.2MHz) boost driver enabling fast enable/disable transitions synchronized with image capture timing. Use Value: Delivers stable 12.8V output with <0.5% load regulation, eliminating visible flicker during rapid UI navigation and video playback. |
| PDA Display Backlight | MP3 Player OLED Interface |
Use Scenario: Supplying adjustable current to a 3-white-LED array in a handheld PDA with resistive touchscreen and QVGA display. IC Role / Device Role / Timing Role: Analog-dimming-capable LED driver using DC voltage injection into FB pin for smooth brightness control without PWM artifacts. Use Value: Enables 100:1 dimming range with <1% current error across –40°C to +85°C ambient - critical for outdoor readability. |
Use Scenario: Providing regulated current to monochrome OLED segments in a battery-powered MP3 player with graphical menu interface. IC Role / Device Role / Timing Role: Low-quiescent-current (2.5mA) boost converter supporting dynamic brightness scaling during audio playback and standby modes. Use Value: Reduces average system power by 18% versus discrete solutions, extending playtime from 12 to 14.2 hours per charge. |
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, 1.3MHz switching, 30V OVP, but only 350mA switch current and 1.25V FB reference. | Limited to ≤3 white LEDs at 15mA; higher RFB power loss reduces efficiency in Li-ion systems. | Choose when lower cost is prioritized over output voltage headroom and thermal margin. |
| TPS61060DRVR | 2.7–5.5V input, 1.2MHz, integrated 500mA MOSFET, 0.5V FB, no OVP pin - requires external zener like MIC2287CBD5. | Higher FB voltage increases RFB dissipation; smaller 2mm × 2mm WSON package but no exposed pad thermal path. | Prefer for newer designs needing RoHS-compliant WSON packaging and tighter input voltage tolerance (±0.1V). |
Compared with MAX1910EUT+T and TPS61060DRVR, the MIC2287CBD5 offers superior switch current (750mA vs. 350/500mA), lower FB voltage (95mV vs. 1.25/0.5V) for reduced sense loss, and broader input range (2.5–10V) - making it optimal for legacy Li-ion and multi-chemistry portable systems where thermal headroom and efficiency are critical.
Availability
MIC2287CBD5 is available at Aetrix Electronics and suitable for cell phone backlighting, digital camera LCD illumination, and PDA display power management requiring stable component supply across extended product lifecycles.
Supply support for MIC2287CBD5 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.
The MIC2287C family was designed specifically for high-efficiency, compact white LED backlight drivers in battery-powered portable electronics - emphasizing low quiescent current, high switching frequency, and robust protection features.
FAQ
What is the maximum number of white LEDs the MIC2287CBD5 can drive in series?
The MIC2287CBD5 supports up to 3-series white LEDs under typical conditions (3.0–3.6V forward voltage per LED), delivering up to 10.8V output. Its 34V OVP rating and 750mA switch current allow margin for transient surges and higher-VF bins, but the Thin SOT-23-5 variant lacks dedicated OVP pin - external zener clamping is required for open-circuit safety. The MIC2287CBD5 datasheet confirms 3-series operation in its typical application circuits.
Does the MIC2287CBD5 include built-in overvoltage protection (OVP)?
No - the MIC2287CBD5 in Thin SOT-23-5 package does not include a dedicated OVP pin. Unlike the MLF™ variants (e.g., MIC2287C-34BML), the BD5 version relies on external protection: a zener diode must be connected between the output and FB pin to clamp voltage during LED open-circuit failure. This design choice trades pin count and package size for external component flexibility, as explicitly stated in the MIC2287CBD5 functional description and package comparison tables.
How is LED current set on the MIC2287CBD5?
LED current is set by a single resistor (RFB) connected between the FB pin and ground, calculated as RFB = 95mV / ILED. For example, a 20mA target yields RFB = 4.75Ω. The MIC2287CBD5's 95mV feedback reference minimizes power loss in RFB compared to higher-voltage references, directly improving thermal performance and efficiency - a key specification confirmed in the Electrical Characteristics table of the MIC2287CBD5 datasheet.
What is the thermal resistance (θJA) of the MIC2287CBD5 package?
The MIC2287CBD5 in Thin SOT-23-5 package has a junction-to-ambient thermal resistance (θJA) of 256°C/W, as specified in the Absolute Maximum Ratings section of its datasheet. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance depends on PCB copper area, airflow, and proximity to other heat sources. The high θJA reflects the package's minimal thermal mass and underscores the importance of limiting continuous switch current and verifying junction temperature in final layout.
Can the MIC2287CBD5 be used with PWM dimming, and what frequency range is supported?
Yes - the MIC2287CBD5 supports PWM dimming via its EN pin, with recommended frequencies between 100Hz and 10kHz. At 1kHz, it achieves smooth brightness control without visible flicker while maintaining >92% efficiency across duty cycles. The EN pin's 1.5V turn-on threshold and <1µA shutdown current ensure clean transitions and low standby power, as verified in the Dimming Control section and Electrical Characteristics table of the MIC2287CBD5 datasheet.
MIC2287CBD5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- TSOT-23-5
MIC2287CBD5 FAQ
1.How can I place an order for MIC2287CBD5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2287CBD5 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 MIC2287CBD5 reliable?
The price and inventory of MIC2287CBD5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2287CBD5 is usually 5 days.
3.What payment methods are accepted for MIC2287CBD5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2287CBD5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2287CBD5?
MIC2287CBD5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2287CBD5 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 MIC2287CBD5?
For technical support, including MIC2287CBD5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2287CBD5 requirements.
6.How does Aetrix verify that MIC2287CBD5 is sourced from the original manufacturer or authorized distributors?
All MIC2287CBD5 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 MIC2287CBD5 meets industry standards.
7.What is the process for return or replacement of MIC2287CBD5?
All MIC2287CBD5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC2287CBD5, 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 MIC2287CBD5 part is unused and in its original packaging.
Return procedure for MIC2287CBD5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2287CBD5 Tags
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BCR430UXTSA2
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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BCR421UW6-7
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BCR420UFD-7
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BCR421UFD-7
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