8.3.3 Reverse Battery Protection

To protect the electronic systems from reverse battery voltage due to miswiring, often a power component like a schottky diode is added in series with the supply line as shown in Figure 27. These additional discretes result in a lossy and bulky protection solution. The LM76202-Q1 devices feature fully integrated reverse input supply protection and does not need an additional diode. These devices can withstand a reverse voltage of –60 V without damage. Figure 28 illustrates the reverse input polarity protection functionality.

Figure 27. Reverse Battery Protection Circuits - Discrete vs LM76202-Q1

Figure 28. Reverse Input Supply Protection at –60 V