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Microchip Technology MIC2289-15YML-TR
- Part No.:
- MIC2289-15YML-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-VFDFN Exposed Pad, 8-MLF®
- Datasheet:
-
MIC2289-15YML-TR.pdf
- Description:
- IC LED DRVR RGLTR PWM 750MA 8MLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,051
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Product details
Overview
MIC2289-15YML-TR from Microchip Technology is a constant-frequency PWM boost switching regulator optimized for constant-current white LED driver applications. It features an internal Schottky diode, 15V output overvoltage protection (OVP), 95 mV feedback reference, 1.2 MHz switching frequency, and supports up to 500 mA switch current. It operates from 2.5V to 10V input and delivers regulated current to LED strings in portable backlighting systems.
For engineers reviewing the MIC2289-15YML-TR datasheet, MIC2289-15YML-TR pinout, MIC2289-15YML-TR application, or MIC2289-15YML-TR equivalent, key selection criteria include OVP threshold accuracy, low-feedback-voltage operation for high efficiency, thermal performance in DFN-8 package, and compatibility with single-cell Li-ion battery inputs.
Technical Context
The MIC2289-15YML-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 delivers up to 500 mA peak switch current with typical 450 mV saturation voltage at 0.5 A.
OVP is implemented via the OUT pin with a factory-trimmed 15 V threshold (13–16 V range), clamping output during open-LED fault conditions. The device integrates separate analog ground (AGND) and power ground (PGND) pins, and uses internal UVLO (2.1 V typ.) and overtemperature shutdown (150 °C) for robust system protection.
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 external regulation. |
| Output OVP Threshold | 15 V (13–16 V) - limits max output to protect LEDs, capacitor, and IC during open-circuit faults; enables use of 16 V-rated output capacitors. |
| Feedback Reference Voltage | 95 mV (±5%) - minimizes I²R loss in current-sense resistor, enabling higher efficiency and lower thermal stress in portable LED drivers. |
| Switching Frequency | 1.2 MHz (1.05–1.35 MHz) - allows compact 10 µH inductors and sub-1 µF ceramic output capacitors, reducing PCB area and EMI filter size. |
| Switch Current Limit | 750 mA typ. - ensures safe operation under transient overload while supporting ≥20 mA per LED across 3–6 series LEDs. |
| Shutdown Current | <1 µA - extends battery life in always-on portable devices by minimizing quiescent drain when disabled via EN pin. |
| Junction Temp Range | –40°C to +125°C - qualified for automotive cabin and industrial handheld environments without derating. |
Pinout & Package
The MIC2289-15YML-TR is housed in an 8-pin 2 mm × 2 mm DFN package (ML) with exposed thermal pad (EP). This RoHS-compliant, low-profile (0.9 mm height) package provides 93°C/W junction-to-ambient thermal resistance and supports reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Output & OVP Sense | Connects to LED anodes and output capacitor; monitors output voltage for 15 V OVP clamp activation. |
| 2 (VIN) | Power Input | Supplies internal circuitry; accepts 2.5–10 V; requires local 1 µF bypass capacitor. |
| 3 (EN) | Enable Control | Logic-high (>1.5 V) enables regulation; logic-low (<0.4 V) disables switching and reduces VIN current to <1 µA. |
| 4 (AGND) | Analog Ground | Reference return for FB and internal error amplifier; must be routed separately from PGND to minimize noise coupling. |
| 5 (NC) | No Connect | Internally unconnected; leave floating or tie to AGND for mechanical stability (no electrical effect). |
| 6 (SW) | Switch Node | Drives external inductor; carries high di/dt; requires tight layout and Kelvin connection to minimize ringing. |
| 7 (FB) | Current Sense Input | Connects to LED cathode via sense resistor; regulates LED current using 95 mV reference (ILED = 95 mV / RFB). |
| 8 (PGND) | Power Ground | Return path for switch current and Schottky diode; must be low-inductance plane tied to EP for thermal and EMI performance. |
| EP | Exposed Pad | Thermal and electrical ground; must be soldered to large PCB copper area for heat dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky Diode | Eliminates external diode, reducing BOM count and board space; rated for 34 V reverse voltage and 150 mA forward current. |
| 15 V Factory-Trimmed OVP | Prevents destructive overvoltage during LED string open-circuit failure; eliminates need for external OVP circuitry. |
| 95 mV Feedback Reference | Reduces power loss in current-sense resistor by >80% vs. standard 1.25 V references, improving efficiency in battery-powered designs. |
| 1.2 MHz Fixed-Frequency PWM | Enables use of small, low-ESR ceramic capacitors and miniature shielded inductors, simplifying EMI filtering and layout. |
| Dual Ground Pins (AGND/PGND) | Separates analog and power return paths to suppress switching noise from corrupting current-sense accuracy. |
Applications
| Cell Phone Backlighting | Digital Camera Flash |
|---|---|
Use Scenario: Driving 3–6 series white LEDs from a single 3.6 V Li-ion cell in ultra-thin smartphone displays. IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED string current via FB pin; OVP protects against display cable disconnect. Use Value: 95 mV feedback reference enables >90% efficiency at 20 mA per LED, extending talk time without increasing battery size. | Use Scenario: Providing high-intensity, short-duration flash illumination for compact digital cameras with limited PCB area. IC Role / Device Role / Timing Role: High-efficiency boost driver delivering pulsed current to LED array; EN pin enables precise PWM dimming at 1–10 kHz. Use Value: 1.2 MHz switching allows use of 10 µH inductor and 0.22 µF ceramic capacitor, fitting within 8 mm² footprint. |
| GPS Navigation Unit Display | IP Phone Keypad Illumination |
Use Scenario: Powering segmented LCD backlight in automotive-grade GPS units operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Temperature-stable LED driver with –40°C to +125°C junction rating; OVP guards against cold-weather LED failure modes. Use Value: 15 V OVP threshold matches typical 12 V max output for 4-LED strings, allowing 16 V-rated capacitors for cost and size optimization. | Use Scenario: Uniform keypad backlighting in VoIP desk phones powered from 5 V USB or PoE-derived rails. IC Role / Device Role / Timing Role: Low-noise constant-current source with AGND/PGND separation; FB pin supports analog dimming via DAC voltage injection. Use Value: Dual ground architecture maintains ±1% current regulation despite shared 5 V supply noise from Ethernet PHY and codec circuits. |
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 scalable output power or programmable OVP is required; not drop-in due to topology and pinout differences. |
| TPS61165DRVR | Integrated MOSFET; no internal Schottky; fixed 1.2 MHz; 28 V OVP option only. | Supports PWM and analog dimming; lacks factory-trimmed 15 V OVP; uses single GND pin instead of AGND/PGND split. | Choose for cost-sensitive consumer lighting where 15 V OVP precision and dual-ground noise immunity are non-critical. |
Compared with LM3409MYX/NOPB and TPS61165DRVR, the MIC2289-15YML-TR offers superior integration (internal Schottky), tighter OVP accuracy (15 V ±1 V), and dedicated ground separation-making it optimal for space-constrained, noise-sensitive portable backlighting where reliability under open-LED fault is critical.
Availability
MIC2289-15YML-TR is available at Aetrix Electronics and suitable for cell phone backlighting, digital camera flash modules, GPS display illumination, and IP phone keypad lighting requiring stable component supply and long-term industrial availability.
Supply support for MIC2289-15YML-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 semiconductor company specializing in microcontrollers, analog devices, and timing solutions, with a focus on embedded control and power management.
The MIC2289 product line is designed specifically for high-efficiency, compact white LED backlighting in portable electronics, emphasizing low quiescent current, integrated protection, and minimal external component count.
FAQ
What is the exact OVP threshold of the MIC2289-15YML-TR and how is it enforced?
The MIC2289-15YML-TR has a factory-trimmed output overvoltage protection threshold of 15 V, specified from 13 V to 16 V across temperature and process variation. It is enforced via the OUT pin, which actively clamps the output voltage during open-LED conditions to prevent damage to the internal switch, external capacitor, and LED string. This OVP function is independent of the FB loop and remains active even when the device is enabled.
Can the MIC2289-15YML-TR drive more than six white LEDs in series?
No-the MIC2289-15YML-TR is not recommended for driving more than six white LEDs in series. With a typical forward voltage of ~3.2 V per LED, seven LEDs would require ~22.4 V, exceeding the 15 V OVP threshold and triggering continuous clamping. The datasheet specifies design examples up to six LEDs and recommends the MIC2289-24YML-TR or MIC2289-34YML-TR for higher-output-voltage applications.
How does the 95 mV feedback voltage improve efficiency in the MIC2289-15YML-TR?
The 95 mV feedback reference in the MIC2289-15YML-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, power loss drops from ~25 mW (with 1.25 V) to ~1.9 mW (with 95 mV), directly improving thermal performance and battery runtime in portable devices without compromising regulation accuracy.
What is the role of the separate AGND and PGND pins on the MIC2289-15YML-TR?
The MIC2289-15YML-TR uses separate AGND and PGND pins to isolate the sensitive analog feedback path from high-current power switching noise. AGND serves as the reference for the 95 mV error amplifier and FB pin, while PGND carries pulsed inductor return current. This separation prevents ground bounce from degrading current regulation accuracy-critical for maintaining consistent LED brightness across varying load and temperature conditions.
Is the MIC2289-15YML-TR compatible with PWM dimming, and what frequency range is supported?
Yes, the MIC2289-15YML-TR supports PWM dimming via its EN pin. Applying a logic-level PWM signal (0 V / >1.5 V) toggles regulation on/off, enabling precise brightness control. The datasheet specifies reliable operation from 100 Hz to 10 kHz; frequencies above 1 kHz avoid audible noise, while frequencies below 200 Hz ensure full current settling between cycles for smooth dimming response.
MIC2289-15YML-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:
- 15V
- 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:
- 8-MLF® (2x2)
MIC2289-15YML-TR FAQ
1.How can I place an order for MIC2289-15YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2289-15YML-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 MIC2289-15YML-TR reliable?
The price and inventory of MIC2289-15YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2289-15YML-TR is usually 5 days.
3.What payment methods are accepted for MIC2289-15YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2289-15YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2289-15YML-TR?
MIC2289-15YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2289-15YML-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 MIC2289-15YML-TR?
For technical support, including MIC2289-15YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2289-15YML-TR requirements.
6.How does Aetrix verify that MIC2289-15YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2289-15YML-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 MIC2289-15YML-TR meets industry standards.
7.What is the process for return or replacement of MIC2289-15YML-TR?
All MIC2289-15YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2289-15YML-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 MIC2289-15YML-TR part is unused and in its original packaging.
Return procedure for MIC2289-15YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2289-15YML-TR Tags
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