? GENERAL DESCRIPTION

The AX3002 series are monolithic IC designed for a step down DC/DC converter, and own the ability of driving a 3 A load without additional transistor. It saves board space. The external shutdown fu nction can be controlled by logic level and then come into standby mode. The internal compensation makes feedback control having good line and load regulation without external design. Regarding protected function, thermal shutdown is to prevent over temper ature 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 AX3002 series operates at a switching freq uency of 150KHz thus allow smaller sized filter components 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 5-Lead TO263 packages.

? FEATURES

- Output voltage: 3.3V, 5V, 12V and adjustable output version.

- Adjustable version output voltage range, 1.23V to 19.5V.

- 150KHz fixed switching frequency.

- Voltage mode non synchronous PWM control.

- Thermal shutdown and current limit protection.

- ON/OFF sh utdown control input.

- Short Circuit Protect (SCP).

- Operating voltage can be up to 22V.

- Output load current: 3A.

- 5-Lead TO263 Pb-Free packages.

- Low power standby mode.

- Built in switching transistor on chip.

- RoHS and Halogen free compliance.