User Manual
Table Of Contents
- 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 / Preliminary
s
XT55/56_hd_v02.96 Page 96 of 125 18.08.2005
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