Follow these general guidelines when
designing the power supply:
- The power supply should be
designed to provide the operating conditions outlined in the recommended
operating conditions section in terms of DC voltage, AC noise, and start-up
ramp time.
- The DS160PR421 does not require any
special power supply filtering, such as ferrite beads, provided that the
recommended operating conditions are met. Only standard supply decoupling is
required. Typical supply decoupling consists of a 0.1 µF capacitor per VCC
pin, one 1.0 µF bulk capacitor per device, and one 10 µF bulk capacitor per
power bus that delivers power to one or more devices. The local decoupling
(0.1 µF) capacitors must be connected as close to the VCC pins as possible
and with minimal path to the device ground pad.
- The DS160PR421 voltage regulator
output pins require decoupling caps of 0.1 µF near each pins. The regulator
is only for internal use. Do not use to provide power to any external
component.