User's Manual

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Centre de Saint Christophe - URD 37
TELEPHONIE MOBILE
MOBILE PHONES
Ref. : SCT TMO MASV2 SPEC 14 M
Date : 04/03/03
E All rights reserved. Reproduction and disclosure prohibited Page 20
MO130 module for mobile applications
This document contains information on a product under development. SAGEM reserves the right to change or discontinue this product
without notice.
3.13 POWER MANAGEMENT AND CHARGE
3.13.1 Battery
The power supply signal VBAT is 3.45V to 5V range and 3.8V nominal.
It has to be more than 3V, even during transients in order to avoid unwanted resets. The power supply
dropout has to be limited to 450mV, when the current consumption goes from minimum to maximum (0.1 to
1.8A). The noise level of the power supply has to be limited to 50mV RMS in the 100MHz – 1MHz frequency
range
A battery level measurement algorithm is turning the module OFF when average VBAT < 3.45V for more
than a few minutes.
For Li-ion battery, SAGEM advises to use Sanyo or LG battery. If other battery is used, SAGEM agreement
is needed (slight qualification tests).
This interface includes main protections.
3.13.2 VRDBB
+1.8V output is available on external pin of the module and could supply +1.8V external components (current
capability 10mA in active mode).
This interface includes main protections.
3.13.3 VRDBBDC
+1.8V input is available on external pin of the module. An external +1.8V DC-DC converter could eventually
be connected on this pin to supply the +1.8V to all the module. If no external DC-DC is added, this pin has to
be connected to the VRDBB output.
This interface includes main protections.
3.13.4 VRIO
+2.8V output is available on external pin of the module and could supply +2.8V external components (current
capability 10mA in active mode).
This interface includes main protections.
3.13.5 V56
+5.6V un-regulated power supply is available for Blue or White LEDs power supply on external pin of the
module with the following characteristics:
- 27mA capability in ON mode
- 5.5V to 5.7V in ON mode
This interface includes main protections.
3.13.6 Vbackup
External Backup could be supply through the VBACKUP input (from 2.2V to 3.2V).
If No external Backup is supplied, VBACKUP input has to be connected to VBAT signal.