TD2576 Datasheet | Techcode

Description   Features     The TD2576 is a series of easy to use fixed and adjustable step-down (buck) switch-mode voltage regulators. These devices are available in fixed output voltage of 3.3V, 5V, and an adjustable output version. Both versions are capable of driving a 3A load with excellent line and load regulation. Requiring a minimum number of external ponents, these regulators are simple to use and include internal frequency pensation, and a fixed-frequency oscillator. The output voltage is guaranteed to ±3% tolerance under specified input voltage and output load conditions. The oscillator frequency is guaranteed to ±15%. External shutdown is included, featuring typically 80 µA standby current. Self protection features include a two stage frequency reducing current limit for the output switch and an over temperature shutdown for plete protection under fault conditions. The TD2576 is available in TO-220B-5L TO220-5L and TO-263-5L packages.   z 3.3V, 5V and adjustable output versions z Output adjustable from 1.23v to 43V z Fixed 52KHz frequency internal oscillator z Guaranteed 3A output load current z Input voltage range up to 45V z Low power standby mode, IQ typically 80 µA z TTL shutdown capability z Excellent line and load regulation z Requires only 4 external ponents z High efficiency z Thermal shutdown and current limit protection z Available in TO-220B/TO220 and TO-263 packages Applications  z Simple High-efficiency step-down regulator z On-card switching regulators z Positive to negative converter z LCD monitor and LCD TV z DVD recorder and PDP TV z Battery charger z Step-down to 3.3V for microprocessors Package Types                        TO220B­5L                  TO220­5L                  TO263­5L      Figure 1. Package Types of TD2576  December,  20,  2005.                                                        Techcode  Semiconductor  Limited                                                  .techcodesemi.  1  T  echcode®       3A 52KHz PWM...