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Microchip Technology MIC2287CYD5
- Part No.:
- MIC2287CYD5
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC2287CYD5.pdf
- Description:
- IC LED DRVR RGLTR PWM TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,619
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Product details
Overview
MIC2287CYD5 from Micrel is a 1.2MHz PWM white LED driver IC optimized for constant-current backlighting applications. 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- to 6-series white LED driving in portable devices such as smartphones and digital cameras.
For engineers reviewing the MIC2287CYD5 datasheet, MIC2287CYD5 pinout, MIC2287CYD5 application, or MIC2287CYD5 equivalent, this page provides verified technical context, package-specific pin functions, real-world dimming implementation details, OVP configuration constraints for Thin SOT-23-5, and validated alternative options for LED driver selection.
Technical Context
The MIC2287CYD5 implements a constant-frequency, current-mode PWM boost regulator architecture with a 1.2MHz oscillator, internal bipolar switch, slope-compensated current loop, and gm error amplifier referenced to 95mV. Its control scheme ensures stable regulation across input and load variations while minimizing input ripple.
Unlike MLF™ variants, the MIC2287CYD5 in Thin SOT-23-5 lacks a dedicated OVP pin; open-circuit protection requires external zener diode clamping from output to FB. It supports both PWM dimming via EN pin and analog dimming via DC voltage injection at FB, with shutdown current <1µA and quiescent current ≤5mA.
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 | 1.05–1.35 MHz (typ. 1.2 MHz) - enables compact 10 µH inductors and 0.22 µF output capacitors. |
| Feedback Voltage | 85–105 mV (typ. 95 mV) - minimizes power loss in current-sense resistor and improves efficiency. |
| Switch Current Limit | 750 mA (min.) - supports ≥500 mA continuous switch current for driving 6-series LEDs at 20 mA. |
| Oscillator Accuracy | ±12.5% over –40°C to +105°C - ensures predictable frequency-dependent component sizing. |
| Junction Temp Range | –40°C to +105°C - qualified for industrial and handheld consumer operating environments. |
| Thermal Resistance θJA | 256°C/W (Thin SOT-23-5) - dictates derating above ~150 mW power dissipation without PCB copper enhancement. |
Pinout & Package
Package: Thin SOT-23-5 (lead-free, Pb-free marking SGAA|), 1.3mm height, footprint compatible with standard SOT-23-5 land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Switch node | Internal bipolar collector output - connects to inductor and flyback diode anode; handles peak currents up to 2A. |
| 2 (GND) | Ground return | Power ground reference for internal circuitry and switch emitter; must be low-inductance connection to PCB ground plane. |
| 3 (FB) | Feedback input | Senses LED current via external resistor; 95 mV reference sets ILED = 95 mV / RFB; also used for external OVP clamping. |
| 4 (EN) | Enable control | Logic-compatible input (VEN ≥1.5 V enables); supports PWM dimming at 100 Hz–10 kHz; draws <40 µA when active. |
| 5 (VIN) | Supply input | Power for internal bias circuitry (2.5–10 V); UVLO threshold 2.1 V (typ.), hysteresis 0.3 V. |
Key Features
| Feature | Design Value |
|---|---|
| 1.2 MHz fixed-frequency PWM | Reduces external inductor size to 10 µH and capacitor size to 0.22 µF, saving >40% board area vs. 500 kHz designs. |
| 95 mV feedback reference | Lowers power dissipation in current-sense resistor by ~5× versus 500 mV references, improving thermal margin in thin SOT-23. |
| Over-temperature shutdown | Activates at 150°C (TJ) with 10°C hysteresis - protects device during sustained overload or poor heatsinking. |
| UVLO with hysteresis | Prevents erratic startup below 2.1 V and ensures clean turn-on/turn-off cycling across battery discharge profiles. |
| Low shutdown current | <1 µA (typ.) - extends battery life in always-on portable systems where EN is controlled by system MCU. |
Applications
| Smartphone Backlight | Digital Camera LCD Backlight |
|---|---|
|
Use Scenario: Driving 3–4 white LEDs in series for main display backlight in space-constrained smartphone PCBs. IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED string current via FB pin; 1.2 MHz switching avoids audible noise and EMI in RF-sensitive bands. Use Value: 95 mV feedback reference reduces sense resistor power loss, enabling use of 0805-size 0.1 Ω resistors without thermal derating. |
Use Scenario: Powering 5–6 white LEDs for high-brightness rear LCD in compact digital cameras with Li-ion battery supply. IC Role / Device Role / Timing Role: High-efficiency boost converter delivering up to 34 V output; OVP implemented externally via zener clamp on FB pin. Use Value: 256°C/W θJA allows operation at full load with minimal copper pour, simplifying layout in multi-layer camera modules. |
| GPS Handheld Display | MP3 Player OLED Backlight |
|
Use Scenario: Illuminating transflective LCD in outdoor GPS units requiring wide temperature operation (–40°C to +85°C). IC Role / Device Role / Timing Role: LED driver with –40°C to +105°C junction rating; PWM dimming via EN pin synchronized to host processor timing. Use Value: Shutdown current <1 µA preserves battery charge during long idle periods between navigation updates. |
Use Scenario: Driving small OLED panel backlight in ultra-thin MP3 players using single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Compact white LED driver in 2.9 mm × 1.6 mm Thin SOT-23-5 package; supports analog dimming via DAC-injected DC voltage at FB. Use Value: 1.2 MHz switching eliminates visible flicker and enables use of ceramic capacitors without microphonic noise issues. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC2287CBD5 | Same electrical specs and pinout; standard (non-lead-free) finish; identical Thin SOT-23-5 package and marking SGAA|. | No RoHS compliance difference in function; suitable where lead-free assembly is not required. | Select MIC2287CBD5 only if legacy Pb-based solder process is used and JEDEC J-STD-020 moisture sensitivity level (MSL) handling aligns with production line. |
| MAX1910EUT+T | 2.5–5.5 V input, 1.2 MHz, 30 V max output, 400 mA switch current, 1.25 V feedback - higher VFB, lower OVP headroom, no integrated OVP. | Targeted at 3–4 LED strings only; requires external OVP and larger sense resistor due to 1.25 V reference. | Choose MAX1910EUT+T only for cost-sensitive 3-LED designs where 95 mV precision and 6-LED capability are unnecessary. |
Compared with MIC2287CYD5, MIC2287CBD5 offers identical performance with non-lead-free finish, while MAX1910EUT+T trades lower output voltage/headroom and higher feedback voltage for reduced BOM count in simpler 3-LED applications - neither is pin-compatible nor drop-in replaceable without layout or resistor value changes.
Availability
MIC2287CYD5 is available at Aetrix Electronics and suitable for smartphone backlighting, digital camera LCD illumination, and GPS handheld display applications requiring stable component supply, RoHS-compliant packaging, and industrial temperature range support.
Supply support for MIC2287CYD5 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 portable consumer electronics - emphasizing low-profile packaging, high-frequency operation, and precise current regulation.
FAQ
What is the maximum number of white LEDs the MIC2287CYD5 can drive in series?
The MIC2287CYD5 supports up to six white LEDs in series, based on its 34 V maximum output voltage and typical forward voltage of 3.2–3.6 V per LED. At 20 mA drive current and 3.4 V average VF, six LEDs require ~20.4 V, well within the 34 V OVP limit. The actual count depends on LED VF tolerance and input voltage headroom - MIC2287CYD5 maintains regulation down to 2.5 V input.
Does the MIC2287CYD5 include built-in overvoltage protection (OVP)?
No - the MIC2287CYD5 in Thin SOT-23-5 package does not include a dedicated OVP pin. OVP must be implemented externally using a zener diode connected from the output to the FB pin, as shown in Figure 4 of the datasheet. In contrast, MLF™ variants (e.g., MIC2287C-34YML) integrate OVP with selectable 15 V/24 V/34 V thresholds.
How is LED brightness controlled using the MIC2287CYD5?
The MIC2287CYD5 supports two dimming methods: (1) PWM dimming by applying a logic-level PWM signal to the EN pin (100 Hz–10 kHz), turning the entire regulator on/off; and (2) analog dimming by injecting a DC control voltage into the FB pin through a series resistor, directly adjusting the 95 mV reference point. Both methods are documented in Figures 1 and 2 of the MIC2287CYD5 datasheet.
What is the thermal performance limitation of the MIC2287CYD5 in Thin SOT-23-5?
The MIC2287CYD5 has a junction-to-ambient thermal resistance (θJA) of 256°C/W in the Thin SOT-23-5 package. At 500 mA switch current and 34 V output, power dissipation may exceed safe limits without PCB copper thermal relief. Derating is required above ~150 mW; recommended design practice includes ≥1 in² of 2-oz copper connected to Pin 2 (GND) and thermal vias under the exposed pad region.
Can the MIC2287CYD5 be used with a 1-cell alkaline battery supply?
Yes - the MIC2287CYD5 operates from 2.5 V to 10 V, covering the full discharge range of a single alkaline cell (1.5 V fresh → 0.9 V end-of-life). However, UVLO activates below 2.1 V (typ.), so usable runtime begins at ~1.0 V above UVLO threshold. For reliable start-up, pair with a low-dropout LDO or ensure system firmware disables EN until battery voltage exceeds 2.5 V.
MIC2287CYD5 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
MIC2287CYD5 FAQ
1.How can I place an order for MIC2287CYD5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2287CYD5 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 MIC2287CYD5 reliable?
The price and inventory of MIC2287CYD5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2287CYD5 is usually 5 days.
3.What payment methods are accepted for MIC2287CYD5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2287CYD5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2287CYD5?
MIC2287CYD5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2287CYD5 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 MIC2287CYD5?
For technical support, including MIC2287CYD5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2287CYD5 requirements.
6.How does Aetrix verify that MIC2287CYD5 is sourced from the original manufacturer or authorized distributors?
All MIC2287CYD5 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 MIC2287CYD5 meets industry standards.
7.What is the process for return or replacement of MIC2287CYD5?
All MIC2287CYD5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC2287CYD5, 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 MIC2287CYD5 part is unused and in its original packaging.
Return procedure for MIC2287CYD5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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