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APE1701 Datasheet(PDF) 1 Page - Advanced Power Electronics Corp. |
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APE1701 Datasheet(HTML) 1 Page - Advanced Power Electronics Corp. |
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1 / 9 page  Advanced Power Electronics Corp. FEATURES DESCRIPTION Output Voltage : 3.3V, 5V, 12V and Adjustable Output Voltage 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 Shutdown Control Input. Short Circuit Protect(SCP) Operating Voltage can be up to 22V Output Load Current 2A SO-8 Package Low Power Standby Mode. Built-in Switching Transistor on Chip RoHS Compliant 1. ADJUSTABLE OUTPUT VOLTAGE VERSION Table 1 Resistor select for output voltage setting Data and specifications subject to change without notice 201207176 APE1701 TYPICAL APPLICATION 1 150KHz, 2A PWM BUCK DC/DC CONVERTER The APE1701 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 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 APE1701 series operates at a switching frequency 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 standard SO-8 package. C2 0.1uF D1 B340A L1 33uH 1 2 C3 470uF C1 470uF U1 APE1701 Vcc SW FB EN Vss Vss Vss Vss VIN=12V ON/OFF C6 0.1uF R2 1.5K R1 4.7K Vout=5.0V/2A VOUT = VFB (1 + R1/R2 ) VFB = 1.23V R2 = 0.47K ~ 2.6K VOUT R2 R1 1.5K 4.7K 1.8K 5.6K 1.5K 2.5K 1.8K 3.0K 2.5V 1.8K 1.8K 1.8V 1.8K 0.82K 5V 3.3V |
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