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Microchip Technology MIC2289-24YML-TR
- Part No.:
- MIC2289-24YML-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-VFDFN Exposed Pad, 8-MLF®
- Datasheet:
-
MIC2289-24YML-TR.pdf
- Description:
- IC LED DRVR RGLTR PWM 750MA 8MLF
- Quantity:
- Payment:
- Shipping:
Inventory:6,620
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Product details
Overview
MIC2289-24YML-TR from Microchip Technology is a constant-frequency PWM boost switching regulator optimized for constant-current white LED driver applications. It operates from 2.5V to 10V input, delivers up to 34V output with 24V overvoltage protection (OVP), integrates a Schottky diode, and supports >500 mA switch current in a 2 mm × 2 mm DFN-8 package. It is used in compact backlighting systems for portable devices requiring high efficiency and low quiescent current.
For engineers reviewing the MIC2289-24YML-TR datasheet, MIC2289-24YML-TR pinout, MIC2289-24YML-TR application, or MIC2289-24YML-TR equivalent, key selection criteria include OVP threshold (24V), 95 mV feedback reference, 1.2 MHz fixed-frequency operation, internal Schottky diode integration, and thermal performance in the DFN-8 package across –40°C to +125°C junction temperature range.
Technical Context
The MIC2289-24YML-TR implements current-mode PWM control with a 1.2 MHz oscillator, slope-compensated ramp generator, and gm error amplifier referenced to 95 mV. Its bipolar output transistor delivers up to 750 mA typical switch current limit and features integrated Schottky diode with 0.8 V forward drop at 150 mA.
OVP is implemented via the OUT pin with a factory-set 24V clamp (21–24V range), protecting against open-LED faults. The device uses separate analog ground (AGND) and power ground (PGND) pins, and shutdown current is <1 μA with EN logic-low assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 10 V - supports single-cell Li-ion and multi-cell alkaline/battery inputs without external regulation. |
| OVP Threshold | 24 V (21–24 V range) - clamps output during open-LED fault, enabling use of 25 V-rated output capacitors. |
| Feedback Voltage | 95 mV ±5% - minimizes power loss in current-sense resistor and enables precise LED current setting (e.g., 20 mA with 4.75 Ω). |
| Switching Frequency | 1.2 MHz (1.05–1.35 MHz) - allows small external inductors (e.g., 4.7–10 μH) and reduces input ripple noise vs. variable-frequency alternatives. |
| Switch Current Limit | 750 mA typical - supports driving up to 6-series white LEDs at 20 mA with margin for transient loads. |
| Junction Temp Range | –40°C to +125°C - qualified for industrial and automotive cabin-temperature environments without derating. |
| Shutdown Current | <1 μA - enables ultra-low-power standby in battery-powered LED flashlights and portable displays. |
Pinout & Package
Package: 8-pin 2 mm × 2 mm DFN (ML), 0.9 mm height, exposed thermal pad (EP), RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Output & OVP Sense | Connects to output capacitor anode and LED anodes; monitors output voltage for 24V OVP clamp activation. |
| 2 (VIN) | Power Input | Supplies internal circuitry; accepts 2.5–10 V; requires local 1 μF ceramic 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 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 per layout best practice (no electrical function). |
| 6 (SW) | Switch Node | Collector of internal bipolar transistor; connects to inductor and Schottky cathode; carries high di/dt switching current. |
| 7 (FB) | Current Sense Input | Connects to LED cathode and sense resistor to ground; regulates LED current via 95 mV reference. |
| 8 (PGND) | Power Ground | Return path for switch current and Schottky; must be low-inductance connection to EP and input/output capacitors. |
| EP | Exposed Pad | Thermal and electrical ground; must be soldered to PCB thermal plane for θJA = 93°C/W and reliable 125°C operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky Diode | Eliminates external diode, saves board space, and reduces BOM count-forward drop 0.8 V at 150 mA ensures minimal conduction loss. |
| 24V Output OVP | Factory-trimmed clamp prevents damage during LED string open-circuit failure; enables smaller, lower-voltage output capacitors (e.g., 25 V rating). |
| 95 mV Feedback Reference | Reduces I²R loss in current-sense resistor by >50% vs. 1.25 V references, improving efficiency and thermal performance in space-constrained designs. |
| 1.2 MHz Fixed-Frequency PWM | Enables use of sub-10 μH inductors and 0.22 μF ceramic output capacitors-reduces solution size by ~40% vs. 500 kHz alternatives. |
| Separate AGND/PGND Pins | Minimizes ground noise coupling into feedback path, preserving current regulation accuracy (<1% line/load regulation) under dynamic load conditions. |
Applications
| Cell Phone Backlighting | Digital Camera Flash |
|---|---|
Use Scenario: Driving 4–6 series white LEDs in ultra-thin smartphone LCD backlight modules powered by single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Constant-current boost regulator with integrated Schottky diode and 24V OVP, operating at 1.2 MHz to minimize EMI and inductor size. Use Value: Enables <1 mm profile backlight solutions with <1% current regulation error and <1 μA shutdown current for extended standby battery life. | Use Scenario: Providing high-intensity, short-duration flash illumination in compact digital cameras using 3.7 V Li-ion supply. IC Role / Device Role / Timing Role: High-efficiency boost driver delivering up to 34 V to parallel LED strings, controlled via PWM dimming on EN pin. Use Value: Achieves >90% peak efficiency at 20 mA per string and supports 100 Hz–10 kHz PWM dimming without efficiency penalty. |
| IP Phone Display Backlight | Portable LED Flashlight |
Use Scenario: Powering monochrome or color TFT display backlights in enterprise VoIP phones with wide-input industrial power rails (3.3–5.5 V). IC Role / Device Role / Timing Role: Stable current source with UVLO (2.1 V typ.) and overtemperature shutdown (150°C), housed in thermally enhanced DFN-8 package. Use Value: Ensures flicker-free illumination across ambient temperatures from –40°C to +70°C with no external thermal management required. | Use Scenario: Driving high-brightness white LEDs in handheld flashlights powered by two AA/AAA alkaline cells (1.8–3.2 V). IC Role / Device Role / Timing Role: Low-quiescent-current boost converter with 24V OVP and soft-start support via external CSS capacitor. Use Value: Delivers full brightness down to 2.5 V input while limiting inrush current and extending battery runtime by >25% vs. discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409MY/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 (>60 V) but larger solution size. | Select when >34 V output or programmable OVP is required; not drop-in due to different topology and pinout. |
| TPS61165DRVR | Integrated MOSFET; no internal Schottky; 40 V OVP option; 1.2 MHz; 1.6 A switch current. | Higher current capability but lacks internal Schottky-requires external diode; OVP fixed at 40 V, less optimal for 24 V–rated capacitors. | Choose for higher LED current (up to 40 mA) or tighter EMI control; verify external diode thermal design and capacitor voltage derating. |
Compared with LM3409MY/NOPB and TPS61165DRVR, the MIC2289-24YML-TR offers smallest footprint and lowest component count due to integrated Schottky and factory-set 24V OVP, making it optimal for space-constrained portable backlighting where 24V fault protection suffices.
Availability
MIC2289-24YML-TR is available at Aetrix Electronics and suitable for cell phone backlighting, digital camera flash circuits, IP phone displays, portable LED flashlights, and industrial HMI panels requiring stable component supply and long-term manufacturability.
Supply support for MIC2289-24YML-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
Microchip Technology is a global provider of microcontrollers, analog components, and timing solutions, with leadership in embedded control and power management ICs.
The MIC2289 product line is designed specifically for compact, high-efficiency constant-current white LED drivers in portable consumer electronics, emphasizing integration, thermal robustness, and minimal external component count.
FAQ
What is the OVP threshold for MIC2289-24YML-TR, and how is it enforced?
The MIC2289-24YML-TR has a factory-set output overvoltage protection (OVP) threshold of 24 V, with a guaranteed range of 21–24 V. This OVP is enforced via the OUT pin, which actively clamps the output voltage during open-LED conditions to prevent damage to the IC and output capacitor. The clamp action is internal and does not require external components, enabling direct use with 25 V-rated output capacitors in MIC2289-24YML-TR designs.
Can MIC2289-24YML-TR drive more than six white LEDs in series?
The MIC2289-24YML-TR supports output voltages up to 34 V, sufficient for driving up to eight standard white LEDs (3.2 V VF each) in series at room temperature. However, its 24 V OVP threshold limits safe sustained operation to ≤7 LEDs (22.4 V max at 3.2 V), and thermal derating at high ambient temperatures further constrains practical use to six LEDs in most portable applications. Always verify worst-case VF and temperature coefficients in MIC2289-24YML-TR designs.
Does MIC2289-24YML-TR require an external Schottky diode?
No, the MIC2289-24YML-TR integrates a Schottky diode internally, eliminating the need for an external diode. This reduces bill-of-materials count, PCB area, and assembly cost. The integrated diode has a typical forward voltage drop of 0.8 V at 150 mA and reverse leakage <4 μA at 30 V, as specified in the MIC2289-24YML-TR datasheet.
How is LED current set in MIC2289-24YML-TR, and what is the role of the 95 mV reference?
LED current in the MIC2289-24YML-TR is set by a single external resistor connected between the FB pin and ground, calculated as RFB = 95 mV / ILED. The 95 mV internal reference minimizes power dissipation in the sense resistor-e.g., only 190 μW for 2 mA LED current-improving efficiency and reducing self-heating versus higher-reference alternatives. This precision reference is trimmed and stable across temperature in MIC2289-24YML-TR.
What package type and thermal characteristics apply to MIC2289-24YML-TR?
The MIC2289-24YML-TR uses the 8-pin 2 mm × 2 mm DFN (ML) package with exposed thermal pad (EP). Its junction-to-ambient thermal resistance (θJA) is 93°C/W with proper PCB copper pour, supporting continuous operation at full load up to +125°C junction temperature. The EP must be soldered to a dedicated thermal plane for compliance with MIC2289-24YML-TR thermal specifications.
MIC2289-24YML-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:
- 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:
- 8-MLF® (2x2)
MIC2289-24YML-TR FAQ
1.How can I place an order for MIC2289-24YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2289-24YML-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 MIC2289-24YML-TR reliable?
The price and inventory of MIC2289-24YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2289-24YML-TR is usually 5 days.
3.What payment methods are accepted for MIC2289-24YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2289-24YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2289-24YML-TR?
MIC2289-24YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2289-24YML-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 MIC2289-24YML-TR?
For technical support, including MIC2289-24YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2289-24YML-TR requirements.
6.How does Aetrix verify that MIC2289-24YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2289-24YML-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 MIC2289-24YML-TR meets industry standards.
7.What is the process for return or replacement of MIC2289-24YML-TR?
All MIC2289-24YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2289-24YML-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 MIC2289-24YML-TR part is unused and in its original packaging.
Return procedure for MIC2289-24YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2289-24YML-TR Tags
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