A1
A1semi Electronics Ltd
AS54303A 400KHz Synchronous Rectified
Step-Down Converter
GENERAL DESCRIPTION
The AS5430 ...
A1
A1semi Electronics Ltd
AS54303A 400KHz Synchronous Rectified
Step-Down Converter
GENERAL DESCRIPTION
The AS5430 is a monolithic synchronous buck
regulator.
The device integrates 100mΩ MOSFETS that provide 3A continuous load current over a wide operating input voltage of 4.75V to 23V. Current mode control provides fast transient response and cycle-by-cycle current limit.
An adjustable soft-start prevents inrush current at turn-on. In shutdown mode, the supply current drops below 1uA. The device provides a very compact system solution with minimal reliance on external components.
FEATURES
3A Output Current
Integrated 100mΩ Power MOSFETS
Wide 4.75~23V Input Voltage Range Programmable Soft-start Up to 95% Efficiency Stable with Low ESR Ceramic Output Capacitors Output Adjustable From 0.925V to 20V Cycle-by-Cycle Over Current Protection Input Under Voltage Lockout Fixed 400KHz Frequency
APPLICATION
Distribute Power Supply Networking Systems Notebook or Mini-book LCD TV/LCD Monitor
ORDER INFORMATION
Order Number AS5430D/TR-LF
Package SOP8(Exposed Pad)
BLOCK DIAGRAM
Packing Tape&Reel, MPQ=2500
Remark Lead-Free
AS5430Ver1.0
1 http://www.a1semi.com
A1
A1semi Electronics Ltd
PIN CONFIGURATION
3A 400KHz Synchronous Rectified
AS5430Step-Down Converter
PIN DESCRIPTION
Pin#
1
2 3 4 5 6 7
8
Name
BS
IN SW GND FB COMP EN
SS
Description
High-side Gate Drive Boost Input.BS suppliers the drive for the high-side N-Channel MOSFET swi...