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PDF BL8526 Data sheet ( Hoja de datos )
| Número de pieza | BL8526 | |
| Descripción | 2A 1.4M 5.5V Synchronous Buck Converter | |
| Fabricantes | SHANGHAI BELLING | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de BL8526 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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BL8526
2A 1.4M 5.5V Synchronous Buck Converter
DESCRIPTION
FEATURES
The BL8526 is a high efficiency
synchronous buck regulator. The device
operates from an input voltage range of
3.6V to 5.5V and provides an output
voltage from 0.8 to 5V while delivering up
to 2A of output current.
The internal synchronous switches
increase efficiency and eliminate the
need for an external Schottky diode. The
switching frequency is set by an external
resistor or can be synchronized to an
external clock. While switching frequency
is set to 1.4MHz, BL8526 can allow the
use of small external components, such
as ceramic input and output caps, as well
as small inductors, while still providing
low output ripples.
100% duty cycle provides low dropout
operation extending battery life in
portable systems.
Range of Input Voltage: 3.6V~5.5V
1μA Shutdown Current
100% Duty Cycle
High Efficiency: 92%
No Schottky Diode Required.
3.5A Current Limit
0.8V Reference for Low Output
Voltage
Operating Temp. Range: -20°C~85°C
Demo Board Available
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
2.2uH
Vout / 3.3V
Vin
10uF
NC RT
180K
PVDD VDD 5.6K 3.3nF
LX COMP
GND FB
BLL8C5221623
31K
10uF
10K
www.belling.com.cn
1
1 page  
BL8526
APPLICATION INFORMATION
Layout is critical to achieve clean and stable operation. The switching power stage
requires particular attention. Follow these guidelines for good PC board layout:
1) Place decoupling capacitors as close to the IC as possible
2) Connect input and output capacitors to the same power ground node with a star ground
configuration then to IC ground.
3) Keep the high-current paths as short and wide as possible.
4) If possible, connect VDD,LX, and GND separately to a large copper area to help cool the
IC to further improve efficiency and long-term reliability.
5) Ensure all feedback connections are short and direct. Place the feedback resistors as
close to the IC as possible.
6) Route high-speed switching nodes away from sensitive analog areas
VIN
C1
1
2
3
4
L1
C2
R3
8
C3
To VIN
7
R4
6
5
R1
R2
www.belling.com.cn
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5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet BL8526.PDF ] | |
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