BL8521 Datasheet, PDF (1/8 Pages) SHANGHAI BELLING CO., LTD. – 3A Synchronous Buck Converter

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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