GENERAL DESCRIPTION
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. FEATURES
- 3A Output Current - Wide 4.75V to 23V Operating Input Range - Integrated 100mΩ Power MOSFET Switches - Output adjust from VFB to 20V - Up to 95% 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 100mΩ + + ERROR AMPLIFIER 6μA - CURRENT COMPARATOR M2 100mΩ 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.1.1 Sep.05, 2011 AX3484 PIN ASSIGNME...
AXElite
