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AMS2576T-XX Datasheet(PDF) 1 Page - Advanced Monolithic Systems Ltd |
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AMS2576T-XX Datasheet(HTML) 1 Page - Advanced Monolithic Systems Ltd |
1 / 9 page 3A Step-Down Voltage Regulator GENERAL DESCRIPTION The AMS2576 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, 12V and an adjustable output version. The AMS2576 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 heat sink, and in some cases no heat sink is required. The ±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 80µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions. This series are offered in 5-pin TO-263, TO-220 package. FEATURES 3.3V, 5V, 12Vand adjustable versions Wide input voltage range, up to 40V Internal oscillator of 52KHz fixed frequency Guaranteed 3A output current Wide adjust version output voltage range from 1.23V to 37V ±4% max. at over line and load conditions Low standby current, typ. 80µA, at shutdown mode Requires only 4 external components Thermal shutdown and current limit protection APPLICATIONS LCD Monitors. ADD-ON Cards Switching Regulators High Efficiency Step-Down Regulators Efficient Pre-regulator for Linear Regulators Positive to Negative converter (Buck-Boost) Block Diagram + - 1.23V Band-Gap Reference 52KHz Oscillator + - Reset Current Limited Thermal Shutdown 2 3 Fixed Gain Error amp. Comparator Driver 3Amp. Switch Internal Regulator Enable 4 R2 R1 1K 1 5 Feed Back + Vin Enable Output Cout D1 + DC Input L1 AMS2576 1 Advanced Monolithic Systems http://www.ams-semitech.com |
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