User's Manual

Stollmann
E + V GmbH
BlueMod+B20
Hardware reference
Author: bg Date of Saving: 28.03.07 Ref: BlueMod+B20_HWreference_V101.doc Revision: 1.00 Page 10 of 10
3 Application Interface
3.1 Power Supply
The BlueMod+B20 requires a power supply with the following characteristics:
3.3V ± 0.1V low noise (≤10mV) >80mA peak
Due to the technological requirements and the pulsed radio transmission the supply
needs to be fed by an ultra fast (response time ≤20µs) linear regulator placed as
close as possible to the VSUP pin (22). Functionality has been verified with the fol-
lowing types: TOREX: XC6204x332xx or XC6401xx42xx
It is also recommended to place a low ESR capacitor with at least 10µF as close as
possible to the VSUP pin (22).
NOTE: You must ensure that during operation the supply voltage never drops below
3.0 V. Otherwise the flash contents (firmware and/or configuration data) can get lost.