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SC2678 Dataheets PDF



Part Number SC2678
Manufacturers CSM
Logo CSM
Description 5A 240KHZ 36V PWM Buck DC/DC Converter
Datasheet SC2678 DatasheetSC2678 Datasheet (PDF)

55AA24204K0HKz H35ZV B3u6cVk DPCWtoMDCBCuoncvkerDteCr /DC Converter SC2678 General Description Features The SC2678 is a 240 KHz fixed frequency monolithic step down switch mode regulator with a built in internal Power MOSFET. It achieves 5A continuous output current over a wide input supply range with excellent load and line regulation. The device includes a voltage reference, oscillation circuit, error amplifier, internal PMOS and etc. The PWM control circuit is able to adjust the duty rati.

  SC2678   SC2678



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55AA24204K0HKz H35ZV B3u6cVk DPCWtoMDCBCuoncvkerDteCr /DC Converter SC2678 General Description Features The SC2678 is a 240 KHz fixed frequency monolithic step down switch mode regulator with a built in internal Power MOSFET. It achieves 5A continuous output current over a wide input supply range with excellent load and line regulation. The device includes a voltage reference, oscillation circuit, error amplifier, internal PMOS and etc. The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An enable function, an over current protection function and a short circuit protection function are built inside. An internal compensation block is built in to minimize external component count. The SC2678 serves as ideal power supply units for portable devices.  5A Constant Output Current  80mΩ RDSON Internal Power PMOSFET Switch  Up to 95% Efficiency  Fixed 240KHz Frequency  Wide 3.6V to 35V Input Voltage Range  Output Adjustable from 1.222V to 30V  Built in Frequency Compensation  Built in Thermal Shutdown Function  Built in Current Limit Function  TO-263 Package is Available  The minimum dropout up to 0.3V  Applications  Portable DVD  LCD Monitor / TV  Battery Charger  ADSL Modem  Telecom / Networking Equipment TO263-5L Figure 1 Package Type of SC2678 TEL:0755-27668758/29469758 web:http://www.zgsemi.com www.086ic.cn 1 55AA24204K0HKz H35ZV B3u6cVk DPCWtoMDCBCuoncvkerDteCr /DC Converter SC2678 Pin Configurations TO263-5L 5 ON/OFF 4 Feedback 3 Output 2 Gnd 1 Vin EXPOSED PAD ON BACKSIDE CONNECT TO PIN3 Pin Description Figure 2 Pin Configuration of SC2678 (Top View) Pin Number 1 3 2 4 5 Pin Name Vin Output GND FB EN Description Supply Voltage Input Pin. SC2678 operates from a 3.6V to 35V DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input. Power Switch Output Pin. SW is the switch node that supplies power to the output. Ground Pin. Care must be taken in layout. This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into SC2678. Feedback Pin. Through an external resistor divider network, FB senses the output voltage and regulates it. The feedback threshold voltage is 1.222V. Enable Pin. EN is a digital input that turns the regulator on or off .Drive EN pin high to turn on the regulator, drive it low to turn it off. Ordering Information SC2678 X X Circuit Type Package S: TO263-5L Packing Blank: Tube R: Type and Reel TEL:0755-27668758/29469758 web:http://www.zgsemi.com www.086ic.cn 2 55AA24204K0HKz H35ZV B3u6cVk DPCWtoMDCBCuoncvkerDteCr /DC Converter Function Block SC2678 Figure 3 Function Block Diagram of SC2678 Absolute Maximum Ratings Parameter Input Voltage Feedback Pin Voltage Enable Pin Voltage Switch Pin Voltage Output Power Limited Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10 sec) ESD (HBM) Thermal Resistance-.


CT1628 SC2678 NK1623


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