CM2576ZJCN263

CM2576 3A STEP DOWN VOLTAGE REGULATOR GENERAL DESCRIPTION The CM2576 series are step-down switching regulators with all required active functions. It is capable of driving 3A load with excellent line and load regulations. These devices are available in fixed output voltages of 3.3V, 5V, and an adjustable output version. The CM2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. Also it requires a minimum number of external components. It substantially not only reduces the area of board size but also the size of the heat sink, and in some cases no heat sink is required. ±4% tolerance on output voltage within specified input voltages and output load conditions is guaranteed. Also, the oscillator frequency accuracy is within ±10%. External shutdown is included, featuring 70µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions. FEATURES ! ! ! ! ! ! ! ! ! Guaranteed 3A output current 3.3V, 5V, and adjustable versions Wide input voltage range, up to 40V Internal oscillator of 52KHz fixed frequency Wide adjustable version output voltage range, from 1.23V to 37V±4% max over line and load conditions Low standby current, typ. 70µA, at shutdown mode Requires only 4 external components Thermal shutdown and current limit protection P+ product enhancement tested APPLICATIONS ! ! ! ! LCD Monitors ADD-ON Cards Switching Regulators High Efficiency Step-Down Regulators Efficient Pre-regulator for Linear Regulators ORDERING INFORMATION Package Type TO-220 CM2576SCN220 CM2576ZJCN220 CM2576CN220 TO-263 CM2576SCN263 CM2576ZJCN263 CM2576CN263 Temperature Range -40℃ ~ +125℃ -40℃ ~ +125℃ -40℃ ~ +125℃ Output Voltage 3.3V 5.0V ADJ. 2003/08/07 Preliminary Rev. 1.1 Champion Microelectronic Corporation Page 1 CM2576 3A STEP DOWN VOLTAGE REGULATOR PIN CONFIGURATION TO-220 Top View TO-263 Top View E N A B LE 5 4 3 2 1 FB GND VOUT V IN V OUT GND FB 4 12 3 5 ABSOLUTE MAXIMUM RATINGS Input Voltage (VPOWER) …….………………………………………….……. +45V ENABLE Pin Input Voltage ….…………………………………. –0.3V ≦V≦VIN Operating Junction Temperature Range, TJ ……………...… 0℃ to +150℃ Storage Temperature ………………………………….….…... -65℃ to +150℃ Lead Temperature (10 sec.) ……..……………………..….…………….... 260℃ POWER DISSIPATION TABLE Package TO-220 TO-263 ΘJA (℃/W) 45 45 Derating factor (mW/℃) TA >= 25℃ 22.2 22.2 TA