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FAN5353MPX Arkusz danych(PDF) 1 Page - Fairchild Semiconductor |
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FAN5353MPX Arkusz danych(HTML) 1 Page - Fairchild Semiconductor |
1 / 13 page September 2010 © 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5353 • Rev. 1.0.2 FAN5353 3MHz, 3A Synchronous Buck Regulator Features 3MHz Fixed-Frequency Operation Best-in-Class Load Transient 3A Output Current Capability 2.7V to 5.5V Input Voltage Range Adjustable Output Voltage: 0.8V to VIN•0.9 Power Good Output Internal Soft-Start Input Under-Voltage Lockout (UVLO) Thermal Shutdown and Overload Protection 12-lead 3x3.5mm MLP Applications Set-Top Box Hard Disk Drive Communications Cards DSP Power Description The FAN5353 is a step-down switching voltage regulator that delivers an adjustable output from an input voltage supply of 2.7V to 5.5V. Using a proprietary architecture with synchronous rectification, the FAN5353 is capable of delivering 3A at over 85% efficiency. The regulator operates at a nominal fixed frequency of 3MHz, which reduces the value of the external components to 470nH for the output inductor and 10µF for the output capacitor. Additional output capacitance can be added without affecting stability if tighter regulation during transients is required. The regulator includes an open-drain power good (PGOOD) signal that pulls low when the output is not in regulation. In shutdown mode, the supply current drops below 1µA, reducing power consumption. FAN5353 is available in a 12-lead 3x3.5mm MLP package. PVIN PVIN VCC EN VOUT FB R2 PGND PGND SW SW C OUT C IN1 R1 AGND PGOOD C VCC 6 5 4 3 2 1 7 8 9 10 11 12 P1 (GND) C IN Figure 1. Typical Application Ordering Information Part Number Temp. Range Package Packing Method FAN5353MPX -40 to 85°C MLP-12, 3x3.5mm Tape and Reel |
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