AX3015 Datasheet | AXElite

DESCRIPTION The AX3015/A/B/C series are monolithic IC designed for a step-down DC/DC converter, and own the ability of driving a 2A load without additional transistor. It saves board space. The external shutdown function can be controlled by logic level and then e into standby mode. The internal pensation makes feedback control having good line and load regulation without external design. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage; current limit is against over current operating of the output switch that set by outside resistance. Current limit depends on RSENSE value. The over voltage protection (OVP) that can avoid high VOUT voltage to damage circuit and capacitor, the OVP voltage is set by outside resistances. When SCP happened and VEN/CT>0.5V, the driver can be auto restart that can prevent driver damage. The auto-restart time set by outside capacitor. The chip is available in SOP-8L-EP package which features small size as exposed pad to reduce the junction-to-case resistance.  FEATURES - Operating voltage can be up to 40V. - Adjustable version output voltage range form 1.2V to 30V. - Output load current: 2A. - External OVP setting function. Ñb€ y - R ` - Operating Frequency:w - V om AX3015/A: 130KHz c . ch e AX3015B/C: 50KHz t o of PWM converter g Voltage mode non-synchronous . w ww and current-limit protection. Thermal-shutdown Shutdown function and auto restart control. Short Circuit Protect (SCP). External current limit setting. Under voltage Lockout. SOP-EP Pb-Free package. Built-in switching transistor on chip. Ûm 1/13 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.2 Aug.04, 2010 AX3015/A/B/C  BLOCK DIAGRAM EN/CT V CC CURRENT SOURCE BIAS 1.23V REFERENCE 2.5V REGULATOR START-UP and Auto restart control 1.25V 1.08V 50K/130KHz OSC. Current limit P. 140m V + + AMP _ + P. SENSE1 SENSE2 CONTROL + DRIVER _ 0.4V AMP + + AMP _ Thermal...