AX3001 Datasheet | AXElite

DESCRIPTION The AX3001 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, and current limit is against over current operating of the output switch. If current limit function occurs and VFB is down below 0.5V, the switching frequency will be reduced. The AX3001 series operates at a switching frequency of 150KHz thus allow smaller sized filter ponents than what would be needed with lower frequency switching regulators. The output version included fixed 3.3V, 5V, 12V, and an adjustable type. The chips are available in a standard 8-lead SOP package. - yÑb€  FEATURES - w`R m Û V w output voltage range, 1.23V to 19.5V. Adjustable version 150KHz fixed switching frequency. Voltage mode non-synchronous PWM control. Thermal-shutdown and current-limit protection. ON/OFF shutdown control input. Short Circuit Protect (SCP). Operating voltage can be up to 22V. Output load current: 2A. SOP-8L Pb-Free packages. Low power standby mode. Built-in switching transistor on chip. Output voltage: 3.3V, w 5V, 12V and adjustable output version. w fo o g . te co . h c m 1/11  BLOCK DIAGRAM 200m V V CC 220m V CURRENT SOURCE BIAS 1.235V REFERENCE 2.5V REGULATOR START UP P. + _ Current limit R2 + AMP _ P. R1 + P. P. CONTROL + DRIVER Thermal Shutdown ADJ : R2=0Ω , R1=OPEN  PIN ASSIGNMENT The package of AX3001 is SOP-8L; the pin assignment is given by: ( Top View ) VÛmw`R- yÑb€ VCC SW FB EN 1 2 3 4 SOP- 8L 8 VSS Name VCC SW FB EN VSS Operating voltage input Switching output Output voltage feedback control ON/OFF Shutdown GND pin w.goftech. 7 VSS 6...