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MIC28303 Datasheet(PDF) 1 Page - Microchip Technology |
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MIC28303 Datasheet(HTML) 1 Page - Microchip Technology |
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1 / 38 page  2016 Microchip Technology Inc. DS20005464A-page 1 MIC28303 Features • Easy to Use - Stable with low-Equivalent Series Resistance (ESR) ceramic output capacitor - No Inductor and No Compensation to Choose • 4.5V to 50V Input Voltage • Single-Supply Operation • Power Good (PG) Output • Low Radiated Emission (EMI) per EN55022, Class B • Adjustable Current Limit • Adjustable Output Voltage from 0.9V to 24V (Also Limited by Duty Cycle) • 200 kHz to 600 kHz, Programmable Switching Frequency • Supports Safe Start-Up into a Prebiased Output • –40°C to +125°C Junction Temperature Range • Available in 64-pin, 12 mm × 12 mm × 3 mm QFN Package Applications • Distributed Power Systems • Industrial • Medical • Telecom • Automotive General Description MIC28303 is synchronous step-down regulator module, featuring a unique adaptive ON-time control architecture. The module incorporates a DC/DC controller, power MOSFETs, bootstrap diode, bootstrap capacitor and an inductor in a single package. The MIC28303 operates over an input supply range from 4.5V to 50V and can be used to supply up to 3A of output current. The output voltage is adjustable down to 0.8V with an accuracy of ±1%. The device operates with programmable switching frequency from 200 kHz to 600 kHz. The MIC28303-1 uses HyperLight Load® architecture for improved efficiency at light loads. The MIC28303-2 uses Hyper Speed Control® for ultra-fast transient response. The MIC28303 offers a full suite of protection features. These include undervoltage lockout, internal soft-start, foldback current limit, “hiccup” mode short-circuit protection, and thermal shutdown. Typical Application Circuit MIC28303 12x12 QFN GND PGND FB SW BSTC MIC28303 ILIM VIN PVDD PGOOD EN FREQ 2.2nF 0.1μF C14 47μF VOUT BSTR ANODE PVIN VIN 4.5V to 50V PG EN 2.2μF 100μF V OUT 5V/3A 10kΩ 1.91kΩ 16.5kΩ 3.57kΩ GND 10pF 75kΩ C12 C2,C3 C1 R3 R1 R15 R19 C10 C6 R11 50V, 3A Power Module |
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