3A Synchronous Buck Converter
BL8521
5.5V, 1.4MHz, 3A Synchronous Buck Converter
DESCRIPTION
The BL8521 is a synchronous, 1.4MHz, fix frequency PWM ...
Description
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
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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...
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