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AX3482

AXElite
Part Number AX3482
Manufacturer AXElite
Description 340kHz Synchronous Rectified Step-Down Converter
Published Jul 17, 2014
Detailed Description AX3482 2A, 23V, 340kHz Synchronous Rectified Step-Down Converter  GENERAL DESCRIPTION The AX3482 is a monolithic synchr...
Datasheet PDF File AX3482 PDF File

AX3482
AX3482

Overview
AX3482 2A, 23V, 340kHz Synchronous Rectified Step-Down Converter  GENERAL DESCRIPTION The AX3482 is a monolithic synchronous buck regulator.
The device integrates two 130mΩ MOSFETs, and provides 2A of continuous load current over a wide 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, and in shutdown mode the supply current drops to 1μA.
This device, available in an 8-pin SOP package, provides a very compact solution with minimal external components.
 FEATURES 2A Output Current Wide 4.
75V to 23V Operating Input Range Integrated 130mΩ Power MOSFET Switches Output adjust from VFB to 20V Up to 93% Efficiency Programmable Soft-Start Stable with Low ESR Ceramic Output Capacitors VÛmw`R•yÑb€ Fixed 350KHz Frequency Cycle-by-Cycle Over Current Protection Thermal shutdown and short circuit protections w.
goftechm  BLOCK DIAGRAM CURRENT SENSE AMPLIFIER OSCILLATOR FB 5 90/350KHz 1 BS RAMP CLK 2 IN + 5V  + SS 8 0.
925V S R Q Q M1 0.
13Ω + + ERROR AMPLIFIER 6μA - CURRENT COMPARATOR M2 0.
13Ω 3 SW 4 GND COMP 6 EN IN EN 7 7V Zener + 1.
5V INTERNAL REGULATORS SHUTDOWN COMPARATOR 5V - 1/9 Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.
1.
2 Sep.
05, 2011 AX3482  PIN ASSIGNMENT The package of AX3482 is SOP-8L; the pin assignment is given by: ( Top View ) BS IN SW GND 1 2 3 4 SOP-8L AX3482 8 7 6 5 SS EN COMP FB Description High-Side Gate Drive Boost Input.
BS supplies the drive for the high-side N-Channel BS MOSFET switch.
Connect a 0.
01μF or greater capacitor from SW to BS to power the high side switch.
Power Input.
IN supplies the power to the IC, as well as the step-down converter IN switches.
Drive IN with a 4.
75V to 23V power source.
Bypass IN to GND with a suitably large capacitor to eliminate noise on the input to the IC.
See Input Capacitor.
Power Switching Output.
SW is the switching ...


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