The device incorporates a linear regulator to generate the 5-V (typ) VCC voltage. The VCC output voltage is monitored to implement undervoltage lockout (UVLO) protection. The UVLO thresholds are fixed and cannot be adjusted. The device has been designed to supply current for the device operation as well as additional power for external circuitry. If a 5-V rail is required in an application, the device can allow up to 500 µA to be drawn in addition to the device load. A capacitance of 1 µF or ≥ 10× the BOOT capacitance to a maximum of 10 µF is recommended.
The device requires adequate input decoupling in order to lower ΔVIN-PP ripple for the best VCC supply voltage performance. ΔVIN-PP must not exceed 10% of the input voltage VIN or 2 V, whichever is lower.