The LMR23630 integrates an internal LDO to generate V_CC for control circuitry and MOSFET drivers. The nominal voltage for V_CC is 4.1 V. The VCC pin is the output of an LDO and must be properly bypassed. Place a high-quality ceramic capacitor with a value of 2.2 µF to 10 µF, 16 V or higher rated voltage as close as possible to VCC and grounded to the exposed PAD and ground pins. The VCC output pin must not be loaded, or shorted to ground during operation. Shorting VCC to ground during operation may cause damage to the LMR23630.

VCC undervoltage lockout (UVLO) prevents the LMR23630 from operating until the V_CC voltage exceeds 3.3 V (typical). The VCC UVLO threshold has 400 mV (typical) of hysteresis to prevent undesired shutdown due to temporary V_IN drops.