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This literature is subject to all applicable copyright laws and is not for resale in any manner.FAN5358 2MHz, 500mA, SC70 Synchronous Buck Regulator March 2013 FAN5358 2MHz, 500mA, SC70 Synchronous Buck Regulator Features Description The FAN5358 is a step-down switching voltage regulator that 2MHz Nominal-Frequency Operation delivers a fixed output from an input voltage supply of 2.7V to 25A Typical Quiescent Current 5.5V. Using a proprietary architecture with synchronous rectification, the device is capable of delivering 500mA and 500mA Output Current Capability maintaining a very high efficiency of over 80% at load currents 2.7V to 5.5V Input Voltage Range as low as 1mA. The regulator operates at a nominal frequency of 2MHz, which reduces the value of the external components 1.0 to 1.8V Fixed Output Voltages to as low as 2.2H for the output inductor and 4.7F for the Low Ripple, Light-Load PFM Mode output capacitor. Internal Soft-Start At moderate and light loads, pulse frequency modulation is used to operate the device in power-save mode with a typical Input Under-Voltage Lockout (UVLO) quiescent current of 25A. Even with such a low quiescent Thermal Shutdown and Overload Protection current, the part exhibits excellent transient response during large load swings. In shutdown mode, the supply current 6-lead 2 x 2.2mm SC70 drops below 1A, reducing power consumption. FAN5358 is available in a 6-lead SC70 package. Applications Cell Phones, Smart Phones 3G, 4G, WiFi , WiMAX, and WiBro Data Cards Netbooks , Ultra-Mobile PCs Typical Application Table 1. External Components for Figure 1 L1 SW VIN 1 6 U1 f L1 C C SW IN OUT C IN FAN5358 2MHz 2.2H 2.2F 4.7F GND GND 2 U1 5 VOUT EN 3 4 C OUT Figure 1. FAN5358 Typical Application Trademarks are the property of their respective owners. 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5358 Rev. 1.0.3