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LED Driver IC 1 Output DC DC Controller Step-Down (Buck) PWM Dimming 8-SOIC

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MIC3203-1YM General Description

The MIC3203 is a hysteretic, step-down, constant-current, High-Brightness LED (HB LED) driver. It provides an ideal solution for interior/exterior lighting, architectural and ambient lighting, LED bulbs, and other general illumination applications.The MIC3203 is well suited for lighting applications requiring a wide-input voltage range. The hysteretic control gives good supply rejection and fast response during load transients and PWM dimming. The high-side current sensing and on-chip current-sense amplifier delivers LED current with ±5% accuracy. An external high-side current-sense resistor is used to set the output current.The MIC3203 offers a dedicated PWM input (DIM) which enables a wide range of pulsed dimming. A high-frequency switching operation up to 1.5MHz allows the use of smaller external components minimizing space and cost. The MIC3203 offers frequency dither feature for EMI control.The MIC3203 operates over a junction temperature from -40°C to +125°C and is available in an 8-pin SOIC package.A dither disabled version MIC3203-1 is also available in the same package as the MIC3203.

Microchip Technology, Inc Inventory

Key Features

    • 4.5V to 42V input voltage range
    • High efficiency (>90%)
    • ±5% LED current accuracy
    • MIC3203: Dither enabled for low EMI
    • MIC3203-1: Dither disabled
    • High-side current sense
    • Dedicated dimming control input
    • Hysteretic control (no compensation required)
    • Up to 1.5MHz switching frequency
    • Adjustable constant LED current
    • Over-temperature protection
    • -40°C to +125°C junction temperature range
Microchip Technology, Inc Original Stock


Category Integrated Circuits (ICs)Power Management (PMIC)LED Drivers Mfr Microchip Technology
Series - Package Tube
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) Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width) Supplier Device Package 8-SOIC
Base Product Number MIC3203 Manufacturer Microchip
Product Category LED Lighting Drivers RoHS Details
Mounting Style SMD/SMT Output Current 1 A
Input Voltage, Min 4.5 V Input Voltage, Max 42 V
Operating Frequency 1.5 MHz Output Voltage 5 V
Minimum Operating Temperature - 40 C Maximum Operating Temperature + 125 C
Features Constant Current Brand Microchip Technology
Input Voltage 4.5 V to 42 V Moisture Sensitive Yes
Number of Channels 1 Channel Product Type LED Lighting Drivers
Factory Pack Quantity 95 Subcategory Driver ICs
Supply Current - Max 3 mA Unit Weight 0.019048 oz

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