I am supplying a SPZB250 ZigBee module with 3.3Vdc from a DC/DC buck/boost switching regulator (TPS63031). The input to the regulator is a Li-ion battery with 3.6V nominal voltage. The device is operated as a ZigBee end device. The problem that I face, is that sometimes when the device connects to the ZigBee network it experiences reset.
I monitor the current drawn from the battery and while the module is active and connects to the network, the current drawn is around 50mA. Sometimes, after the connection has been established and while idle (or even while transmitting) the current drawn falls to around 0.8mA, which is the sleep current of the device.
Can this behavior be caused by instant drops of the supply voltage from the regulator? Or, perhaps the switching current from the regulator produces noise that causes this reset? Can anyone give me a hint on this? Have in mind that this is the first time I use a switching regulator in my designs, so I do not have any experience at all.
I monitor the current drawn from the battery and while the module is active and connects to the network, the current drawn is around 50mA. Sometimes, after the connection has been established and while idle (or even while transmitting) the current drawn falls to around 0.8mA, which is the sleep current of the device.
Can this behavior be caused by instant drops of the supply voltage from the regulator? Or, perhaps the switching current from the regulator produces noise that causes this reset? Can anyone give me a hint on this? Have in mind that this is the first time I use a switching regulator in my designs, so I do not have any experience at all.