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SC2621A 数据表(PDF) 1 Page - Semtech Corporation |
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SC2621A 数据表(HTML) 1 Page - Semtech Corporation |
1 / 14 page POWER MANAGEMENT 1 www.semtech.com SC2621A Voltage Mode PWM Controller With Linear Power Regulator Features Applications February 21, 2007 Typical Application Circuit Description The SC2621A provides the control and protection fea- tures necessary for a synchronous buck converter and a linear regulator in high performance graphic card appli- cations. The SC2621A is designed to directly drive the top and bottom MOSFETs of the buck converter. It uses an inter- nal 8.2V supply as the gate drive voltage for minimum driver power loss and MOSFET switching loss. It allows the converter to operate with 4V to 25V power rail and as low as 0.5V output. The SC2621A is capable to drive a N-type MOSFET in a linear regulator with as low as 0.5V output. The SC2621A features soft-start, supply power under voltage lockout, and hiccup mode over current protec- tion. The SC2621A monitors the output current by using the Rdson of the bottom MOSFET in the buck converter that eliminates the need for a current sensing resistor. The SC2621A is offered in SOIC-14 package. u 4V to 25V power rails u Internal LDO for optimum gate drive voltage u 1.5A gate drive current u Adaptive non-overlapping gate drives provide shoot-through protection for MOSFETs u Programmable output voltages u Internal soft start for both outputs u Power rail under voltage lockout u Hiccup mode short circuit protection u SOIC-14 package, fully RoHS and WEEE compliant u Graphics processor power supplies on PCI-Express platform u Embedded, low cost, high efficiency converters u Point of load power supplies 12V IN 1.5V OUT U2 S C2 621A 1 2 3 4 10 11 12 14 5 13 6 7 9 8 BST OCS COMP FB DRV DL GND DH LDOG PN LDFB GND NC VCC + + 2.5V OUT 3.3V IN + 1 2 |
类似零件编号 - SC2621A |
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类似说明 - SC2621A |
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