BL8021 Datasheet, PDF (1/7 Pages) SHANGHAI BELLING CO., LTD. – 1.2A 1.5MHz 7V Synchronous Buck Converter

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
10uF
IN
SW
B^LL^C8³0⁴2⁰1⁶
EN
FB
GND
2.2uH
240K
120K
V_OUT
1.8V/1A
10uF
1.8V/1A Step-Down Converter
PIN OUT & MARKING
EN 1
G2
SW 3
5 FB
4 IN
SOT23-5
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