DESCRIPTION

     The APE1705 series are monolithic IC designed for a step-down DC/DC converter, and own the ability of driving a 3A load without additional transistor. It saves board  space. The external shutdown function 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 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  APE1705 series operates at a switching frequency of 150KHz thus allow smaller sized filter components than what would be needed with lower frequency switching regulators. Other features include a guaranteed  Ô4% tolerance on output voltage  under specified input voltage and output load conditions, and  Ô15% on the oscillator  frequency. The output version included fixed 3.3V, 5V, 12V, and an adjustable type. The chips are available in a 5-Lead TO-263 and 5-Lead TO-220 package.

  FEATURES
● Output voltage: 3.3V, 5V, 12V and adjustable output version.
●  Adjustable version output voltage range, 1.23V to 38.5V.
●150KHz  Ô15% 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 40V.
●  Output load current: 3A.
● 5-Lead TO-263 and TO-220 Pb-Free packages.
● Low power standby mode.
●  Built-in switching transistor on chip.

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