ZHCSND8 april 2021 LM117QML-SP
PRODUCTION DATA
Ensure wide enough traces for those carrying the load current in order to reduce the amount of parasitic trace inductance. Keep the feedback loop from VOUT to ADJ as short as possible. To improve PSRR, a bypass capacitor can be placed at the ADJ pin and must be located as close as possible to the IC. In cases when VIN shorts to ground, an external diode must be placed from VOUT to VIN to divert the surge current from the output capacitor and protect the IC. Similarly, in cases when a large bypass capacitor is placed at the ADJ pin and VOUT shorts to ground, an external diode must be placed from ADJ to VOUT to provide a path for the bypass capacitor to discharge. These diodes must be placed close to the corresponding LM117QML-SP pins to increase their effectiveness.