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Microchip Technology MIC3203-1YM-TR
- Part No.:
- MIC3203-1YM-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC3203-1YM-TR.pdf
- Description:
- IC LED DRIVER CTRLR PWM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,232
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Product details
Overview
MIC3203-1YM-TR from Microchip Technology is a hysteretic step-down constant-current LED driver controller with high-side current sensing, designed for wide-input industrial and architectural lighting. It operates from 4.5V to 42V input, delivers ±5% LED current accuracy, supports up to 1.5 MHz switching, and features dedicated PWM dimming control (DIM) and enable (EN) inputs - used in MR-16 bulbs, street lighting, and channel letter systems.
For engineers reviewing the MIC3203-1YM-TR datasheet, MIC3203-1YM-TR pinout, MIC3203-1YM-TR application, or MIC3203-1YM-TR equivalent, key selection considerations include its dither-disabled operation (vs. MIC3203), SOIC-8 package compatibility, high-side sense architecture, thermal shutdown at 160°C, and absence of external compensation requirements.
Technical Context
The MIC3203-1YM-TR implements hysteretic control without error amplifier or loop compensation, relying on internal current-sense comparator thresholds (VCS(MIN) = 168–186 mV, VCS(MAX) = 201.4–222.6 mV) referenced to VIN. Its switching frequency varies dynamically with input voltage, LED string voltage, inductance, and temperature - ranging from ~400 kHz to 1.5 MHz - and is not externally programmable.
Unlike the dither-enabled MIC3203, the MIC3203-1YM-TR omits frequency modulation, eliminating ±12% fSW dithering and ±6 mV VCS threshold dithering. It retains identical functional block diagram, pinout, thermal protection (160°C shutdown, 20°C hysteresis), and 5V internal regulator (VCC output, 4.5–5.5 V, 10 mA load capability).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports 12 V, 24 V, and 36 V industrial lighting rails without pre-regulation. |
| LED Current Accuracy | ±5% - achieved via high-side current sense with factory-trimmed VCS thresholds and Kelvin RCS routing. |
| Switching Frequency | Up to 1.5 MHz - enables compact magnetics and reduces solution footprint; no external oscillator required. |
| Junction Temperature Range | –40°C to +125°C - qualified for under-hood, outdoor, and high-ambient industrial LED applications. |
| Thermal Shutdown Threshold | 160°C (±20°C hysteresis) - protects external MOSFET and PCB during sustained overloads or poor heatsinking. |
| VCC Regulator Output | 5.0 V ±0.5 V - powers internal circuitry only; requires 1 µF ceramic bypass between VCC and AGND. |
| Enable Input Threshold | VENH ≥ 2.2 V, VENL ≤ 0.4 V - compatible with standard 3.3 V/5 V logic; draws ≤60 µA bias current. |
Pinout & Package
Package: 8-pin SOIC (M), surface-mount, RoHS-compliant, θJA = 98.9°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Internal 5 V regulator output | Power source for internal logic; must be bypassed with 1 µF ceramic capacitor to AGND - not for external loads. |
| 2 - CS | High-side current sense input | Monitors voltage drop across external RCS resistor; referenced to VIN; enables ±5% LED current regulation. |
| 3 - VIN | Main power input | Supplies internal circuitry and current-sense comparator; requires 10 µF ceramic bypass to PGND near IC. |
| 4 - AGND | Analog ground reference | Return path for VCC, CS, EN, DIM; must be separated from PGND and joined at single point to minimize noise coupling. |
| 5 - EN | Enable control input | Logic-high (≥2.2 V) enables operation; logic-low disables DRV and reduces supply current to <1 µA. |
| 6 - DIM | PWM dimming control | Directly gates DRV output; ≥2.0 V enables LED current, <0.4 V disables - independent of EN state when EN = high. |
| 7 - PGND | Power ground return | High-current return for MOSFET switching loop; must be routed separately from AGND with minimal loop area. |
| 8 - DRV | N-channel MOSFET gate driver | Push-pull output (RDRV(ON) ≤ 2 Ω); drives external FET gate; transitions in ≤13 ns with 1 nF load. |
Key Features
| Feature | Design Value |
|---|---|
| Hysteretic control topology | Eliminates need for external compensation components and avoids stability issues across wide LED string voltages. |
| Dither-disabled operation | Removes frequency modulation - simplifies EMI filtering design where deterministic spectral peaks are preferred. |
| High-side current sensing | Enables floating LED cathode configuration and simplifies PCB layout versus low-side sensing in buck topologies. |
| Dedicated DIM and EN pins | Supports independent hardware-level brightness control and system-level on/off sequencing without microcontroller involvement. |
| Integrated 5 V regulator | Reduces BOM count by powering internal circuitry from VIN; eliminates need for external bias supply. |
Applications
| Architectural Lighting | Street & Area Lighting |
|---|---|
Use Scenario: Constant-current drive for multi-LED strings in façade illumination and interior cove lighting with 24 V or 36 V DC distribution. IC Role / Device Role / Timing Role: Hysteretic LED current controller regulating up to 3 A via external MOSFET and RCS resistor. Use Value: ±5% current accuracy ensures consistent lumen output across temperature and input voltage variation. |
Use Scenario: Outdoor LED luminaires powered from 12–42 V battery or PoE-derived supplies in smart city infrastructure. IC Role / Device Role / Timing Role: High-voltage buck controller enabling single-stage conversion from unregulated solar/battery sources. Use Value: –40°C to +125°C operation supports deployment in extreme ambient conditions without derating. |
| MR-16 LED Retrofit Bulbs | Channel Letter Signage |
Use Scenario: Replacement of halogen MR-16 lamps using existing 12 V AC/DC transformers with minimal form-factor constraints. IC Role / Device Role / Timing Role: Compact SOIC-8 LED driver with integrated gate driver and high-frequency operation (≤1.5 MHz). Use Value: Small inductor size enabled by high fSW reduces height and volume - critical for enclosed bulb housings. |
Use Scenario: Illumination of aluminum channel letters with long LED strings requiring stable current despite varying line impedance. IC Role / Device Role / Timing Role: High-side sense controller tolerant of ground-referenced LED anodes and common-cathode configurations. Use Value: Dedicated DIM pin allows seamless integration with 0–10 V or PWM building management systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4425AGU-AEC1-P | Fixed-frequency synchronous buck (2.2 MHz), integrated MOSFETs, no high-side sense, ±3% current accuracy. | Lower BOM count (no external FET/diode), but limited to ≤36 V input and ≤1.2 A output; not suitable for >3 A or >42 V designs. | Select MPQ4425AGU-AEC1-P for space-constrained, lower-current automotive interior lighting where integrated power stage is preferred. |
| LM3409HVMM/NOPB | Constant-current buck controller with adjustable frequency (200 kHz–2 MHz), external MOSFET, high-side sense, ±3% accuracy. | Requires external compensation; supports wider VIN (6–75 V); lacks dedicated DIM pin - dimming implemented via CS or EN modulation. | Select LM3409HVMM/NOPB for ultra-wide input (e.g., 48 V telecom) or when precise frequency setting and higher voltage margin are required. |
Compared with MPQ4425AGU-AEC1-P and LM3409HVMM/NOPB, the MIC3203-1YM-TR offers deterministic dither-free switching, simpler layout due to hysteretic control, and native DIM/EN dual-control - making it optimal for cost-sensitive, thermally demanding industrial LED drivers where external FET flexibility and 42 V max input are essential.
Availability
MIC3203-1YM-TR is available at Aetrix Electronics and suitable for architectural lighting, street lighting, and MR-16 LED retrofit applications requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant sourcing.
Supply support for MIC3203-1YM-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 Inc. is a global semiconductor company specializing in microcontrollers, analog devices, and timing solutions, with emphasis on reliability, longevity, and industrial-grade qualification.
The MIC3203/MIC3203-1 product line delivers high-efficiency, high-voltage LED driver controllers targeting cost-sensitive yet thermally demanding lighting applications - emphasizing simplicity, robustness, and wide-input adaptability.
FAQ
What is the key functional difference between MIC3203-1YM-TR and MIC3203YM-TR?
The MIC3203-1YM-TR is the dither-disabled variant of the MIC3203YM-TR. While both share identical pinout, package, electrical specs, and thermal behavior, the MIC3203-1YM-TR omits the ±12% frequency dithering and ±6 mV VCS threshold dithering present in the MIC3203YM-TR - resulting in a fixed spectral EMI profile ideal for deterministic filtering in sensitive RF environments.
Can MIC3203-1YM-TR drive LEDs directly, or does it require external components?
The MIC3203-1YM-TR is a controller IC and cannot drive LEDs directly. It requires an external N-channel MOSFET (driven by DRV), Schottky freewheeling diode, inductor, input capacitor (10 µF ceramic), VCC bypass capacitor (1 µF ceramic), and high-side current-sense resistor (RCS) - all specified in the DS20006250A datasheet for target LED current and input conditions.
What is the maximum LED current achievable with MIC3203-1YM-TR?
The MIC3203-1YM-TR itself does not limit LED current - it regulates current set by the external RCS resistor and supported by the selected MOSFET and inductor. Per Microchip's design tables, it supports up to 3.0 A LED current (using 0.068 Ω RCS, 22 µH inductor, 36 V input), constrained only by thermal limits of the external FET and PCB layout.
Does MIC3203-1YM-TR support analog dimming, or only PWM dimming?
The MIC3203-1YM-TR supports only digital PWM dimming via the dedicated DIM pin (0–100% duty cycle, up to 20 kHz). It does not implement analog dimming - there is no ISET or CTRL pin for current scaling. Brightness control must be implemented by pulsing the DIM input while EN remains asserted.
Is MIC3203-1YM-TR pin-compatible with MIC3203YM-TR?
Yes - MIC3203-1YM-TR and MIC3203YM-TR are fully pin-compatible, share identical SOIC-8 (M) package dimensions, pin functions, and thermal characteristics. They can be substituted on the same PCB without layout changes, provided the system design accounts for the presence or absence of frequency dithering in EMI compliance testing.
MIC3203-1YM-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 42V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 1.5MHz
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MIC3203-1YM-TR FAQ
1.How can I place an order for MIC3203-1YM-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC3203-1YM-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 MIC3203-1YM-TR reliable?
The price and inventory of MIC3203-1YM-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC3203-1YM-TR is usually 5 days.
3.What payment methods are accepted for MIC3203-1YM-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC3203-1YM-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC3203-1YM-TR?
MIC3203-1YM-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC3203-1YM-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 MIC3203-1YM-TR?
For technical support, including MIC3203-1YM-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC3203-1YM-TR requirements.
6.How does Aetrix verify that MIC3203-1YM-TR is sourced from the original manufacturer or authorized distributors?
All MIC3203-1YM-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 MIC3203-1YM-TR meets industry standards.
7.What is the process for return or replacement of MIC3203-1YM-TR?
All MIC3203-1YM-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC3203-1YM-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 MIC3203-1YM-TR part is unused and in its original packaging.
Return procedure for MIC3203-1YM-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC3203-1YM-TR Tags
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BCR402RE6327HTSA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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