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FAN53525UC48X Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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FAN53525UC48X Datasheet(HTML) 1 Page - Fairchild Semiconductor |
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1 / 4 page  July 2014 © 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN53525 • Rev. 1.0.1 FAN53525 3.0A, 2.4MHz, Digitally Programmable TinyBuck® Regulator Features Fixed-Frequency Operation: 2.4 MHz Best-in-Class Load Transient Continuous Output Current Capability: 3.0 A 2.5 V to 5.5 V Input Voltage Range Digitally Programmable Output Voltage: - 0.600 V to 1.39375 V in 6.25 mV Steps Programmable Slew Rate for Voltage Transitions I2C-Compatible Interface Up to 3.4 Mbps PFM Mode for High Efficiency in Light Load Quiescent Current in PFM Mode: 50 µA (Typical) Input Under-Voltage Lockout (UVLO) Thermal Shutdown and Overload Protection 15-Bump Wafer-Level Chip Scale Package (WLCSP) Applications Application, Graphic, and DSP Processors - ARM™, Tegra™, OMAP™, NovaThor™, ARMADA™, Krait™, etc. Hard Disk Drives, LPDDR3 Tablets, Netbooks, Ultra-Mobile PCs Smart Phones Gaming Devices All trademarks are the property of their respective owners. Description The FAN53525 is a step-down switching voltage regulator that delivers a digitally programmable output from an input voltage supply of 2.5 V to 5.5 V. The output voltage is programmed through an I 2C interface capable of operating up to 3.4 MHz. Using a proprietary architecture with synchronous rectification, the FAN53525 is capable of delivering 3.0 A continuous at over 80% efficiency, maintaining that efficiency at load currents as low as 10 mA. The regulator operates at a nominal fixed frequency of 2.4 MHz, which reduces the value of the external components to 330 nH for the output inductor and as low as 20 µF for the output capacitor. Additional output capacitance can be added to improve regulation during load transients without affecting stability, allowing inductance up to 1.2 µH to be used. At moderate and light loads, Pulse Frequency Modulation (PFM) is used to operate in Power-Save Mode with a typical quiescent current of 50 µA at room temperature. Even with such a low quiescent current, the part exhibits excellent transient response during large load swings. At higher loads, the system automatically switches to fixed-frequency control, operating at 2.4 MHz. In Shutdown Mode, the supply current drops below 1 µA, reducing power consumption. PFM Mode can be disabled if fixed frequency is desired. The FAN53525 is available in a 15-bump, 1.310 mm x 2.015 mm, 0.4 mm ball pitch WLCSP. Figure 1. Typical Application |
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