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SHANGHAI BELLING - 3.0-A Synchronous Step-Down Converter

Numéro de référence BLI9184
Description 3.0-A Synchronous Step-Down Converter
Fabricant SHANGHAI BELLING 
Logo SHANGHAI BELLING 





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BLI9184 fiche technique
BLI9184
4.75V to 18V Input, 3.0-A Synchronous Step-Down Converter with +/-1.5% High Accuracy
Features
3.0-A Output Current
High Efficient Integrated FETs Optimized for
portable application:
85m(High side) and 75m(Low side)
High Efficiency
Up to 96% Efficiency @ 5V Input, 3.3V Output
Up to 94% efficiency @ 12V Input, 3.3V Output
Wide Input Voltage Range: 4.75V to 18V @
3.0-A loading
Wide Output Voltage Range: 0.923V to 14V @
3.0-A loading ( 54Watt output @max)
Low Output Ripple and Allows Ceramic Output
Capacitor
Thermal Shutdown Protection
340-KHz Switching Frequency(fsw)
Cycle By Cycle Over Current Limit
+/-1.5% High Accuracy Feedback Voltage
Applications
Wide Range of Applications for Low Voltage
System
- Digital TV Power Supply
- High Definition Blu-ray Disc Players
- Networking Home Terminal
- Digital STB
- Ideal for Portable Applications
Descriptions
The BLI9184 is a current mode synchronous
buck converter, and has a proprietary W-mode™®
Gm curvature circuit that enables fast transient
response, enables the device to adopt to both low
ESR output capacitors, such as POSCAP or
SP-CAP, and ultra-low ESR ceramic capacitors.
The BLI9184 operates from 4.75-V to 18-V Vin
input, and the output voltage can be programmed
between 0.923V to 14v with 3.0A output current,
and +/-1.5% high accuracy output voltage.
Due to 85m(High side) and 75m(Low side)
integrated FETs, the BLI9184 works in high
efficiency (up to 94% @12V Input, 3.3V output) .
Typical Application
Input 4.3V – 18V
C3 10nF
C1
10µF/25V
Ceramic
C8
0.47µF
R4 100K 2
1
IN
7
EN
BS 3
SW
8 FB 5
SS COMP G
64
C4
6.8nF
R3
2.2K
L1 10µH
R1 26.1K
1%
R2 10K
1%
Output
3.3V 3A
Cout
10µF/4.5V
Ceramic
X2
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