My Inquiry
My Account
Microchip Technology MIC3287-24YD6-TR
- Part No.:
- MIC3287-24YD6-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MIC3287-24YD6-TR.pdf
- Description:
- IC LED DRVR RGLTR PWM TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:54,214
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC3287-24YD6-TR from Micrel is a 1.2MHz PWM white LED driver IC optimized for constant-current backlighting of up to 4-series white LEDs, featuring 24V over-voltage protection (OVP), 250mV feedback voltage, and 350mA switch current in a Thin SOT-23-6 package. It operates from 2.8V–6.5V input and delivers up to 36V output without OVP.
For engineers reviewing the MIC3287-24YD6-TR datasheet, MIC3287-24YD6-TR pinout, MIC3287-24YD6-TR application, or MIC3287-24YD6-TR equivalent, key selection factors include OVP threshold accuracy (17–24V), thermal shutdown at 150°C, shutdown current <1µA, and compatibility with Li-ion single-cell sources in space-constrained portable displays.
Technical Context
The MIC3287-24YD6-TR implements constant-frequency current-mode PWM control at 1.2MHz, using an internal bipolar transistor and slope-compensated current sensing. Its gm error amplifier compares FB voltage against a 250mV reference to regulate LED current via external sense resistor.
OVP functionality is implemented on the dedicated OVP pin (Pin 5), clamping output voltage when sensed above threshold; this feature is exclusive to YD6 and YML packages. UVLO (2.1V typ) and thermal shutdown (150°C, 10°C hysteresis) provide robust system-level protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.2 MHz ±0.2 MHz - enables compact 10 µH inductors and 0.22 µF output capacitors, reducing board area. |
| Feedback Voltage | 250 mV ±7.5% - sets LED current as ILED = 250 mV / RFB, minimizing power loss in current-sense resistor. |
| OVP Threshold | 17–24 V - protects SW node and external components during open-circuit LED failure; active only when OVP pin is connected to output. |
| Input Voltage Range | 2.8 V to 6.5 V - supports single-cell Li-ion (3.0–4.2 V nominal) and regulated 3.3/5 V rails without external LDO. |
| Shutdown Current | <1 µA - ensures battery longevity in standby mode for portable devices like MP3 players and GPS units. |
| Switch Current Limit | 350 mA min - sustains drive for 4-white-LED strings at ~20 mA each under worst-case VIN/VOUT conditions. |
| Junction Temp Range | –40°C to +125°C - validated for operation in automotive cabin and industrial handheld environments. |
Pinout & Package
Package: Thin SOT-23-6 (YD6), 1.6 mm × 2.9 mm × 1.1 mm profile, lead-free, exposed pad not present (unlike MLF variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Supplies internal circuitry and bias; accepts 2.8–6.5 V; must be decoupled with ≥1 µF ceramic capacitor near pin. |
| OVP (Pin 2) | OVP Sense Input | Monitors output voltage; connects directly to boost node; triggers clamp when >24 V; absent in YD5 variant. |
| EN (Pin 3) | Enable Control | Active-high logic input; 1.5 V threshold turn-on; pulls internal regulator into ultra-low-ISD state when low. |
| AGND (Pin 4) | Analog Ground | Reference return for FB, OVP, and internal error amplifier; must be routed separately from power ground to minimize noise coupling. |
| FB (Pin 5) | Current Sense Feedback | Connects to LED cathode via sense resistor; regulates LED current by maintaining 250 mV across RFB. |
| SW (Pin 6) | Switch Node | Collector of internal bipolar transistor; drives external inductor; requires low-inductance layout to limit ringing and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| 24V OVP with dedicated pin | Prevents destructive overvoltage during LED string open-circuit faults-only available in YD6/YML packages, not YD5. |
| 250mV feedback reference | Reduces sense resistor power dissipation by 4× versus 1V references, critical for thermally constrained handheld PCBs. |
| 1.2MHz fixed-frequency PWM | Enables use of miniature 10 µH inductors and 0.22 µF ceramic output caps, shrinking total solution size vs. 500 kHz alternatives. |
| <1µA shutdown current | Extends battery life in always-on portable devices such as IP phones and digital cameras during display-off states. |
| –40°C to +125°C operation | Validated performance across automotive interior temperature extremes and industrial embedded enclosures without derating. |
Applications
| Cell Phone Backlighting | PDA Display Illumination |
|---|---|
Use Scenario: Driving 3–4 white LEDs in series for high-brightness LCD backlight in slim clamshell or slider form factors. IC Role / Device Role / Timing Role: Constant-current PWM boost controller regulating LED string current via FB pin; OVP prevents damage if LED opens during drop testing. Use Value: Eliminates ballast resistors and reduces BOM count; 24V OVP ensures reliability in field-replaceable modules where LED failure modes are uncontrolled. | Use Scenario: Powering monochrome or color TFT backlights in enterprise PDAs used in warehouse logistics scanning. IC Role / Device Role / Timing Role: Step-up DC-DC converter with enable-controlled dimming; EN pin accepts 1kHz PWM from host MCU for brightness adjustment. Use Value: 1.2MHz switching avoids audible noise in proximity to microphone/speaker; <1µA shutdown extends battery runtime between scans. |
| Digital Camera Flash/Backlight | IP Phone Status Display |
Use Scenario: Dual-role support: steady backlight for LCD preview and pulsed flash for image capture (via EN pin modulation). IC Role / Device Role / Timing Role: High-efficiency current source delivering up to 20 mA per LED in 4-string configuration; thermal shutdown prevents overheating during burst flash. Use Value: Single IC replaces separate backlight and flash drivers; 350mA switch current headroom accommodates aging LED forward voltage drift. | Use Scenario: Illuminating multi-segment status LEDs (power, line, mute) on VoIP desk phones operating continuously for weeks. IC Role / Device Role / Timing Role: Always-on constant-current source with UVLO preventing brownout-induced flicker during PoE power fluctuations. Use Value: 2.8V minimum input allows direct connection to PoE-powered 3.3V rail; 125°C junction rating supports sealed plastic enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1910ETE+ | 2.5–5.5V input; 1.3MHz; no integrated OVP; requires external OVP circuit; 300mA switch current. | Lacks built-in OVP; suitable only where fault protection is handled externally or redundancy is acceptable. | Select MAX1910ETE+ only if board space permits external OVP components and thermal margin allows lower switch current. |
| TPS61160DRVR | 2.7–6V input; 1.2MHz; 400mA switch current; no OVP; 200mV feedback voltage; WSON-6 package. | Higher switch current but no OVP; smaller 2mm × 2mm WSON package; different pinout and layout requirements. | Choose TPS61160DRVR when higher current headroom is needed and OVP is managed at system level (e.g., via supervisor IC). |
Compared with MAX1910ETE+ and TPS61160DRVR, the MIC3287-24YD6-TR uniquely integrates 24V OVP in the same Thin SOT-23-6 footprint, eliminating external protection components while maintaining 350mA capability and 250mV feedback for optimal efficiency in space-limited portable designs.
Availability
MIC3287-24YD6-TR is available at Aetrix Electronics and suitable for cell phone backlighting, PDA display illumination, digital camera flash circuits, IP phone status displays, and portable GPS systems requiring stable component supply across extended production lifecycles.
Supply support for MIC3287-24YD6-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
Micrel, Inc. was a U.S.-based analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015; it specialized in power management, LED drivers, and timing solutions.
The MIC3287 product line was designed specifically for compact, high-efficiency white LED backlighting in battery-powered portable electronics, emphasizing integration of protection features (OVP, UVLO, thermal shutdown) without sacrificing small-footprint packaging.
FAQ
What is the exact over-voltage protection threshold of the MIC3287-24YD6-TR?
The MIC3287-24YD6-TR has a guaranteed OVP threshold of 17 V minimum to 24 V maximum at TJ = 25°C, with typical value of 19 V. This range is specified in the Electrical Characteristics table and applies only when the OVP pin (Pin 2) is connected directly to the boost output node. The MIC3287-24YD6-TR does not activate OVP unless this connection is made.
Can the MIC3287-24YD6-TR drive more than four white LEDs in series?
No-the MIC3287-24YD6-TR is characterized to drive up to four white LEDs in series under typical conditions (e.g., 3.6 V input, 3.2 V LED VF each). Attempting five LEDs would exceed its 36 V maximum output (without OVP) or trigger OVP clamping at 24 V, causing regulation loss and potential instability. The MIC3287-24YD6-TR datasheet explicitly specifies "up to 4 white LEDs" in its General Description.
How does the MIC3287-24YD6-TR achieve <1µA shutdown current?
The MIC3287-24YD6-TR achieves sub-µA shutdown by fully disabling its internal oscillator, error amplifier, and bipolar switch when EN is pulled low. Internal bias circuitry enters deep sleep, reducing VIN supply current to 0.04–1 µA (typ/max) as measured in Electrical Characteristics. This behavior is confirmed across –40°C to +125°C and is intrinsic to the MIC3287-24YD6-TR's architecture-not dependent on external components.
Is the FB pin of the MIC3287-24YD6-TR compatible with continuous dimming using a DAC?
Yes-the FB pin of the MIC3287-24YD6-TR accepts a DC control voltage applied through a series resistor (e.g., 49.9kΩ) to dynamically adjust LED current. As described in the Dimming Control section, this method allows linear intensity control using a DAC output or filtered PWM signal, leveraging the MIC3287-24YD6-TR's gm error amplifier to reinterpret the FB reference point.
Does the MIC3287-24YD6-TR require an external soft-start capacitor?
No-the MIC3287-24YD6-TR does not integrate soft-start, but one can be added externally using a capacitor (e.g., 2200 pF) and resistor (e.g., 10 kΩ) network from FB to GND, as shown in Figure 3 of the datasheet. This optional circuit limits inrush current during startup but is not mandatory for basic operation; the MIC3287-24YD6-TR starts reliably without it under normal load conditions.
MIC3287-24YD6-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):
- 2.8V
- Voltage - Supply (Max):
- 6.5V
- Voltage - Output:
- 36V
- Current - Output / Channel:
- 350mA (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
MIC3287-24YD6-TR FAQ
1.How can I place an order for MIC3287-24YD6-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC3287-24YD6-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 MIC3287-24YD6-TR reliable?
The price and inventory of MIC3287-24YD6-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC3287-24YD6-TR is usually 5 days.
3.What payment methods are accepted for MIC3287-24YD6-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC3287-24YD6-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC3287-24YD6-TR?
MIC3287-24YD6-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC3287-24YD6-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 MIC3287-24YD6-TR?
For technical support, including MIC3287-24YD6-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC3287-24YD6-TR requirements.
6.How does Aetrix verify that MIC3287-24YD6-TR is sourced from the original manufacturer or authorized distributors?
All MIC3287-24YD6-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 MIC3287-24YD6-TR meets industry standards.
7.What is the process for return or replacement of MIC3287-24YD6-TR?
All MIC3287-24YD6-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC3287-24YD6-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 MIC3287-24YD6-TR part is unused and in its original packaging.
Return procedure for MIC3287-24YD6-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC3287-24YD6-TR Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
