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Microchip Technology MIC2289-24YD6-TR
- Part No.:
- MIC2289-24YD6-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MIC2289-24YD6-TR.pdf
- Description:
- IC LED DRVR RGLTR PWM TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,276
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Product details
Overview
MIC2289-24YD6-TR from Microchip Technology is a constant-frequency PWM boost switching regulator optimized for constant-current white LED driver applications, featuring an internal Schottky diode, 24V output overvoltage protection (OVP), 95 mV feedback reference, 1.2 MHz switching frequency, and >500 mA switch current capability in a 6-pin Thin SOT-23 package. It delivers stable LED current for backlighting in portable devices with minimal external components.
For engineers reviewing the MIC2289-24YD6-TR datasheet, MIC2289-24YD6-TR pinout, MIC2289-24YD6-TR application, or MIC2289-24YD6-TR equivalent, key selection criteria include OVP threshold accuracy, low-feedback-voltage operation for efficiency, thermal performance in Thin SOT-23, and compatibility with single-cell Li-ion input sources (2.5–10 V).
Technical Context
The MIC2289-24YD6-TR implements current-mode PWM control with a fixed 1.2 MHz oscillator, slope-compensated ramp generator, and gm error amplifier referenced to 95 mV. Its bipolar output transistor supports >500 mA peak switch current and integrates Schottky diode functionality to reduce board area and component count.
OVP is implemented via the OUT pin with a factory-trimmed 24 V threshold (21–24 V range), clamping output during open-LED fault conditions. Undervoltage lockout (1.8–2.4 V) and overtemperature shutdown (150 °C) provide system-level protection without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 10 V - supports single-cell Li-ion (3.0–4.2 V) and multi-cell alkaline/NiMH sources without pre-regulation. |
| OVP Threshold | 21–24 V - precisely trimmed for 24 V option; prevents damage to LEDs and output capacitor during open-circuit faults. |
| Feedback Voltage | 90–100 mV (typ. 95 mV) - enables ultra-low-power current sensing with <1% line/load regulation and minimal I²R loss in sense resistor. |
| Switching Frequency | 1.05–1.35 MHz (typ. 1.2 MHz) - allows use of small 4.7–10 µH inductors and sub-1 µF output capacitors, reducing solution footprint. |
| Shutdown Current | 0.1–1 µA - ensures battery longevity in always-on portable systems when EN = 0 V. |
| Junction Temp Range | –40 °C to +125 °C - qualified for automotive cabin, industrial handheld, and extended-temperature consumer applications. |
| Package Thermal RθJA | 177 °C/W (Thin SOT-23-6) - requires careful PCB copper pour design for >200 mA continuous LED current at high ambient. |
Pinout & Package
Microchip MIC2289-24YD6-TR is housed in a 6-pin Thin SOT-23 (TSOT23-6) package with exposed pad not connected internally (no EP terminal). Pin 1 is marked by a dot; pin numbering follows standard TSOT23 orientation (counterclockwise from mark).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Switch Node | Collector of internal bipolar transistor; connects to inductor and Schottky anode; carries high di/dt switching current. |
| 2 (GND) | Ground Return | Analog/digital ground reference for control circuitry; must be low-impedance connection to minimize noise coupling. |
| 3 (FB) | Feedback Input | Senses voltage across external current-set resistor; 95 mV reference sets LED current as ILED = 95 mV / RFB. |
| 4 (EN) | Enable Control | Logic-high (>1.5 V) enables regulation; logic-low (<0.4 V) disables switching and reduces VIN current to <1 µA. |
| 5 (VIN) | Power Supply Input | Supplies internal bias circuitry; accepts 2.5–10 V; UVLO activates below ~2.1 V to prevent unstable startup. |
| 6 (OUT) | OVP Output / Anode Tie | Connects to cathodes of series LEDs and output capacitor; monitors output for 24 V OVP clamp activation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky Diode | Eliminates need for external flyback diode, reducing BOM count, layout area, and forward voltage drop losses. |
| 24 V Factory-Trimmed OVP | Prevents destructive overvoltage during LED string open-circuit failure; eliminates need for external OVP comparator or Zener clamp. |
| 95 mV Feedback Reference | Reduces power dissipation in current-sense resistor by >90% vs. conventional 1.25 V references, enabling higher efficiency at low LED currents. |
| 1.2 MHz Constant-Frequency PWM | Enables predictable EMI filtering and compact magnetics; avoids variable-frequency noise spread while minimizing input ripple injection. |
| Internal Bipolar Switch | Supports >500 mA peak switch current with 450 mV saturation voltage at 0.5 A, optimizing conduction loss in portable power-constrained designs. |
Applications
| Cell Phone Backlighting | Digital Camera Flash |
|---|---|
Use Scenario: Driving 3–6 white LEDs in series from a single 3.6 V Li-ion cell in slim smartphone bezels. IC Role / Device Role / Timing Role: Constant-current boost controller with integrated Schottky and 24 V OVP; regulates LED current independent of battery voltage decay. Use Value: Enables uniform brightness over full battery discharge (3.0–4.2 V), extends runtime via 95 mV FB efficiency, and protects against LED-open faults without added components. | Use Scenario: Providing high-intensity, short-duration flash illumination in compact digital cameras using 2–4 series LEDs. IC Role / Device Role / Timing Role: Fast-starting boost driver supporting PWM dimming via EN pin; delivers up to 500 mA pulsed current with soft-start to limit inrush. Use Value: Achieves rapid flash response (<100 µs enable delay) and precise intensity control via external PWM, while OVP prevents capacitor overvoltage during flash capacitor recharge cycles. |
| GPS System Display | MP3 Player UI Lighting |
Use Scenario: Powering monochrome or color LCD backlight in automotive-grade GPS units operating from 5 V USB or 12 V vehicle supply with LDO pre-regulation. IC Role / Device Role / Timing Role: Efficient boost converter delivering regulated current to 4–8 series LEDs; operates across –40 °C to +85 °C ambient with thermal shutdown. Use Value: Maintains consistent display luminance under wide temperature and input voltage variation; 125 °C junction rating ensures reliability in sealed enclosures. | Use Scenario: Illuminating OLED or segment LCD user interface in battery-powered MP3 players requiring long playback time and low standby drain. IC Role / Device Role / Timing Role: Low-quiescent-current (2.5 mA typ.) LED driver with <1 µA shutdown mode; supports analog dimming via FB pin DC voltage injection. Use Value: Extends battery life through ultra-low idle current and enables smooth, flicker-free brightness control using filtered PWM or DAC voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409MYX/NOPB | External MOSFET driver; no integrated Schottky; adjustable OVP; 1.6 MHz switching. | Requires external high-side N-MOSFET and Schottky; supports higher output voltages (>40 V) and currents (>1.5 A). | Select when higher power, programmable OVP, or thermal design flexibility outweighs BOM simplicity. |
| TPS61061DRVR | CMOS-based boost; 28 V OVP; 1.2 MHz; no integrated Schottky; 400 mA switch current. | Lower max switch current; requires external Schottky; smaller 6-pin WSON package; lower quiescent current (26 µA). | Select for ultra-low-IQ battery applications where 400 mA peak current suffices and external diode is acceptable. |
Compared with LM3409MYX/NOPB and TPS61061DRVR, the MIC2289-24YD6-TR offers the smallest total solution size for ≤500 mA, 24 V OVP LED drivers due to its integrated Schottky and minimal external part count (only inductor, capacitor, and sense resistor), while maintaining robust thermal protection and wide input range.
Availability
MIC2289-24YD6-TR is available at Aetrix Electronics and suitable for cell phone backlighting, digital camera flash circuits, GPS display modules, and MP3 player UI lighting requiring stable component supply, RoHS compliance, and extended temperature operation.
Supply support for MIC2289-24YD6-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
Microchip Technology is a global provider of microcontrollers, analog, FPGA, and timing solutions, with leadership in embedded control and power management ICs.
The MIC2289 product line delivers highly integrated, thermally robust white LED drivers targeting space-constrained portable electronics where efficiency, fault protection, and minimal external components are critical.
FAQ
What is the OVP threshold of the MIC2289-24YD6-TR and how is it implemented?
The MIC2289-24YD6-TR features a factory-trimmed 24 V output overvoltage protection threshold, specified as 21–24 V. It is implemented via internal circuitry monitoring the OUT pin voltage; when exceeded, the device clamps the output to protect LEDs and the output capacitor. This function is intrinsic to the MIC2289-24YD6-TR and requires no external components.
Can the MIC2289-24YD6-TR drive more than six white LEDs in series?
The MIC2289-24YD6-TR can drive up to six white LEDs in series under typical conditions (3.0–3.6 V per LED), yielding ~18–21.6 V output, safely within its 24 V OVP limit. Driving seven or more LEDs risks exceeding the OVP threshold during cold start or high-VF bins, so the MIC2289-24YD6-TR is not recommended for >6-LED strings without derating or verification.
Does the MIC2289-24YD6-TR require an external Schottky diode?
No, the MIC2289-24YD6-TR integrates a Schottky diode internally, eliminating the need for an external flyback diode. This integration reduces bill-of-materials count, PCB area, and forward voltage loss-key advantages confirmed in the MIC2289-24YD6-TR datasheet's General Description and Features sections.
What is the minimum input voltage required for the MIC2289-24YD6-TR to operate stably?
The MIC2289-24YD6-TR has a guaranteed operating input voltage range of 2.5 V to 10 V. Its undervoltage lockout (UVLO) turns off regulation below ~2.1 V (typ.), so stable operation begins at ≥2.5 V. At 2.5 V input, the device sustains >500 mA switch current and maintains regulation for LED strings requiring moderate boost ratios.
How does the 95 mV feedback voltage improve efficiency in the MIC2289-24YD6-TR?
The 95 mV feedback voltage in the MIC2289-24YD6-TR reduces power dissipation in the external current-sense resistor by over 90% compared to conventional 1.25 V references. For a 20 mA LED current, RFB = 4.75 Ω dissipates only 19 µW-enabling higher efficiency, cooler operation, and longer battery life in portable MIC2289-24YD6-TR implementations.
MIC2289-24YD6-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- 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:
- 24V
- Current - Output / Channel:
- 750mA (Switch)
- Frequency:
- 1.2MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
MIC2289-24YD6-TR FAQ
1.How can I place an order for MIC2289-24YD6-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2289-24YD6-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 MIC2289-24YD6-TR reliable?
The price and inventory of MIC2289-24YD6-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2289-24YD6-TR is usually 5 days.
3.What payment methods are accepted for MIC2289-24YD6-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2289-24YD6-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2289-24YD6-TR?
MIC2289-24YD6-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2289-24YD6-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 MIC2289-24YD6-TR?
For technical support, including MIC2289-24YD6-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2289-24YD6-TR requirements.
6.How does Aetrix verify that MIC2289-24YD6-TR is sourced from the original manufacturer or authorized distributors?
All MIC2289-24YD6-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 MIC2289-24YD6-TR meets industry standards.
7.What is the process for return or replacement of MIC2289-24YD6-TR?
All MIC2289-24YD6-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2289-24YD6-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 MIC2289-24YD6-TR part is unused and in its original packaging.
Return procedure for MIC2289-24YD6-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2289-24YD6-TR Tags
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BCR402RE6327HTSA1
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BCR420UE6433HTMA1
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LYT1604D-TL
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