Integration Guide

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PAN9028 Wi-Fi/Bluetooth Module 4 Power Supply
Module Integration Guide Rev. 1.0 Page 15 of 45
4 Power Supply
The following conditions must be met:
 The supply voltage must be free of AC ripple voltage (for example from a battery or a low
noise regulator output). For noisy supply voltages, provide a decoupling circuit (for example
a ferrite in series connection and a bypass capacitor to ground of at least 47 µF directly at
the module).
 The supply voltage should not be exceedingly high or reversed. It should not carry noise
and/or spikes.
ENWF940[x]A1EF: The V
OUT1V1
, V
OUT1V8
and V
OUT2V2
power supply pins are only
for internal purpose. Do not use them to power external curcuits.
Take care to follow correct power-up sequence of module which is specified in
PAN9028 product specification.