BL8521
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.
5.5V, 1.4MHz,
3A Synchronous Buck Converter
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
BL8521 is available in DFN 3x3 -10 package.
APPLICATIONS
3G network modem
Smart phone, PDA
Digital camera
LCDTV
Portable devices
TYPICAL APPLICATION
REV2.0
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