Overcurrent protection functions integrated LDO power regulator is prone to latch-up problems

In addition to performance to meet the power requirements of the product, the power supply itself is also very important protective measures, that is, to prevent over-current LDO output due to overload or short circuit caused by accidental damage protection measures. However, certain over-current protection with Integrated LDO power  mcb circuit breaker is prone to latch-up problems affecting its normal use, also requires the designer to give perfect. In the National Natural Science  Circuit breaker of China and the Sichuan Provincial Fund under academic leaders we studied the power management chip, we first analyzed the two traditional methods overcurren  power transformers and the advantages and disadvantages, based on this study and put forward a kind of high performance LDO based overcurrent protection circuit, this protection circuit can not only reliably protect the chip, but also reduce system power consumption and improving the integrated regulator latch