BL8021
1.2A 1.5MHz 7V Synchronous Buck Converter
DESCRIPTION
The BL8021 is a high-efficiency, DC-to-DC step-
down switching regulators, capable of delivering up
to 1.2A of output current. The device operates from
an input voltage range of 2.6V to 7.0V and provides
an output voltage from 0.6V to VIN, making the
BL8021 ideal for low voltage power conversions.
Running at a fixed frequency of 1.5MHz allows the
use of small external components, such as ceramic
input and output caps, as well as small inductors,
while still providing low output ripples. This low
noise output along with its excellent efficiency
achieved by the internal synchronous rectifier,
making BL8021 an ideal green replacement for
large power consuming linear regulators. Internal
soft-start control circuitry reduces inrush current.
Short-circuit and thermal-overload protection
improves design reliability.
BL8021 is housed in a SOT23-5 Package
FEATURES
High Efficiency: Up to 96%
Capable of Delivering 1.2A
1.5MHz Switching Frequency
No External Schottky Diode Needed
Low dropout 100% Duty operation
Internal Compensation and Soft-Start
Current Mode control
0.6V Reference for Low Output voltages
Logic Control Shutdown (IQ<1uA)
Thermal shutdown and UVLO
Available in SOT23-5
APPLICATIONS
Cellular phones
Digital Cameras
MP3 and MP4 players
Set top boxes
Wireless and DSL Modems
USB supplied Devices in Notebooks
Portable Devices
TYPICAL APPLICATION
V
IN
2.6V to 7V
IN
SW
2.2uH
PIN OUT & MARKING
V
OUT
1.8V/1A
EN 1
5
FB
10uF
EN
LC3406
BL8021
FB
GND
240K
10uF
GGZZ
G 2
SW 3
120K
4 IN
SOT23-5
1.8V/1A Step-Down Converter
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BELLING [ SHANGHAI BELLING CO., LTD. ]
