BL8521

BL8521 5.5V, 1.4MHz, 3A Synchronous Buck Converter DESCRIPTION The BL8521 is a synchronous, 1.4MHz, fix frequency PWM Buck converter. It is ideal for powering portable equipment that powered by a single cell Lithium-ion batter, or USB port. The BL8521 can provide up to 3A of load current with output voltage as low as 0.8V. It can operate at 100% duty cycle for low dropout application. With its peak current mode control and outside compensation, the BL8521 is stable with ceramic capacitors and small inductors. BL8521 comprises a cycle-by-cycle current limit and thermal shutdown to protect itself from fault application. BL8521 is available in DFN 3x3 -10 package. FEATURES  Adjustable Output Voltage, 0.8 - Vin  High efficiency, up to 96%  Output voltage accuracy 2%  0.1ohm Rdson of internal MOSFET  3A maximum output current  Up to 1.5MHz fix switching frequency  5.5V maximum operation voltage  Short circuit protection  Thermal shutdown protection  10mV Load regulation at 3A load  Compatible with ceramic output capacitor  Excellent load transient performance  In-rush current suppression  Reverse current suppression for light load  Available in DFN3x3-10 package APPLICATIONS  3G network modem  Smart phone, PDA  Digital camera  LCDTV  Portable devices TYPICAL APPLICATION REV2.0 Page1 BL8521 BLOCK DIAGRAM 5.5V, 1.4MHz, 3A Synchronous Buck Converter PIN CONFIGURATION DFN3x3-10 PIN NO. 1 2 3,4 5 6,7 8 9 10 PIN NAME PIN FUNCTION SHDN/RT Oscillator Resi...