User's Manual
Table Of Contents
- Contents
- Figures
- Tables
- Document history
- Introduction
- Product concept
- GSM application interface
- GSM/GPRS operating modes
- Power supply
- Power up / down scenarios
- Automatic GPRS Multislot Class change
- Charging control of the GSM part
- Power saving
- Summary of state transitions (except SLEEP mode)
- RTC backup for GSM part of XT55/56
- Serial interfaces of the XT55/56 GSM part
- Audio interfaces
- SIM interface
- Control signals
- GPS application interface
- GSM and GPS antenna interfaces
- Electrical, reliability and radio characteristics
- Mechanics
- Reference approval
- Example applications
- List of parts and accessories
XT55/56 Hardware Interface Description
Confidential / Released
s
XT55/56_hd_v02.06a Page 95 of 125 17.12.2004
6.4 Power supply ratings
Table 28: Power supply ratings (GSM part)
Parameter Description Conditions Min Typ Max Unit
Supply voltage Reference points on XT55/56:
TP GSM_BATT+ and TP GND (see
Figure 50).
Voltage must stay within the
min/max values, including voltage
drop, ripple, spikes.
3.3 4.2 4.8 V
Voltage drop
during transmit
burst
Normal condition, power control
level for P
out max
400 mV
GSM_BATT+
Voltage ripple Normal condition, power control
level for P
out max
@ f<200kHz
@ f>200kHz
50
2 mV
POWER DOWN mode 50 100 µA
SLEEP mode @ DRX = 6 3 mA
IDLE mode GSM850
EGSM 900
GSM 1800/1900
15
15
15
mA
TALK mode GSM850
1)
4)
EGSM 900
1)
4)
GSM 1800/1900
2) 4)
260
260
180
mA
IDLE GPRS GSM850
EGSM 900
GSM 1800/1900
15
15
15
mA
DATA mode GPRS,
(4 Rx, 1 Tx) GSM 850
1) 4)
EGSM 900
1) 4)
GSM 1800/1900
2) 4)
300
300
230
mA
Average supply
current
3)
DATA mode GPRS,
(3 Rx, 2 Tx) GSM 850
1) 4)
EGSM 900
1) 4)
GSM 1800/1900
2) 4)
450
450
330
mA
I
GSM_BATT+
Peak supply
current (during
transmission slot
every 4.6ms)
Power control level
1)
1.6 A
1)
Power control level PCL 5
2)
Power control level PCL 0
3)
All average supply current values @ I
GSM_VDD
= 0mA
4)
Test conditions: 50Ω