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FSP3122D50AE Datasheet(PDF) 1 Page - FOSLINK SEMICONDUCTOR CO.,LTD |
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FSP3122D50AE Datasheet(HTML) 1 Page - FOSLINK SEMICONDUCTOR CO.,LTD |
1 / 11 page 150KHZ 3A PWM BUCK DC/DC CONVERTER 2007-6-12 1/11 FSP3123 PIN CONFIGURATION (1) TO220-5L (2) TO263-5L (Top View) (Top View) (3) PDIP8L (Top View) Symbol TO220/TO263 PDIP Name Descriptions 1 1 Vin Operating Voltage Input 2 2 Output Switching Output 3 5~8 Gnd Ground 4 3 FB Output Voltage Feedback Control 5 4 SD ON/OFF Shutdown FEATURES Output voltage: 3.3V, 5.0V, 12V, and adjustable output version Adjustable version output voltage range:1.23V to 18V±4% 150KHz±15% fixed switching frequency Voltage mode non-synchronous PWM control Thermal-shutdown and current-limit protection ON/OFF shutdown control input Operating voltage can be up to 22V Output load current: 3A Low power standby mode Built-in switching transistor on chip TO220-5L,TO263-5L and PDIP8L packages APPLICATIONS Simple High-efficiency step-down regulator On-card switching regulators Positive to negative converter GENERAL DESCRIPTION The FSP3123 series are monolithic IC that design for a step-down DC/DC converter, and own the ability of driving a 3A load without additional transistor component. Due to reducing the number of external component, the board space can be saved easily. The external shutdown function can be controlled by logic level and then come into standby mode. The internal compensation makes feedback control have 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 occurred and VFB is down to 0.5V below, the switching frequency will be reduced. The FSP3123 series operates at a switching frequency of 150 KHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Other features include a guaranteed ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. The output version included fixed 3.3V, 5V, 12V, and an adjustable type. The packages are available in a standard 5-lead TO-220 package, a 5-lead TO-263 package or 8-lead PDIP. Metal Tab Gnd 1 VIN 2 OUTPUT 3 GND 4 FB 5 SD 1 2 3 4 5 VIN OUTPUT GND FB SD Metal Tab Gnd 8 7 6 5 1 2 3 4 VIN OUTPUT FB SD GND GND GND GND |
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