Ublox LISA-U1 Series, Руководство по системной интеграции

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LISA-U1 series - System Integration Manual
3G.G2-HW-10002-3 Preliminary System description
Page 23 of 125
5V
C1 R1
IN OUT
ADJ
GND
1
2 4
5
3
C2 R2
R3
U1
SHDN
LISA-U1 series
62
VCC
63
VCC
61
VCC
GND
Figure 8: Suggested schematic design for the VCC voltage supply application circuit using an LDO linear regulator
Reference Description Part Number - Manufacturer
C1 10 µF Capacitor Ceramic X5R 0603 20% 6.3 V GRM188R60J106ME47 - Murata
C2 10 µF Capacitor Ceramic X5R 0603 20% 6.3 V GRM188R60J106ME47 - Murata
R1 47 k Ω Resistor 0402 5% 0.1 W RC0402JR-0747KL - Yageo Phycomp
R2 4.7 k Ω Resistor 0402 5% 0.1 W RC0402JR-074K7L - Yageo Phycomp
R3 2.2 k Ω Resistor 0402 5% 0.1 W RC0402JR-072K2L - Yageo Phycomp
U1 LDO Linear Regulator ADJ 3.0 A LT1764AEQ#PBF - Linear Technology
Table 6: Suggested components for VCC voltage supply application circuit using an LDO linear regulator
Rechargeable Li-Ion battery
Rechargeable Li-Ion batteries connected to the
VCC
pins should meet the following requirements:
Maximum pulse and DC discharge current : the rechargeable Li-Ion battery with its output circuit must be
capable of delivering 2.5 A current pulses with 1/8 duty-cycle to the VCC pins and must be capable of
delivering a DC current greater than the module maximum average current consumption to VCC pins. The
maximum pulse discharge current and the maximum DC discharge current are not always reported in
battery data sheets, but the maximum DC discharge current is typically almost equal to the battery capacity
in Amp-hours divided by 1 hour
DC series resistance : the rechargeable Li-Ion battery with its output circuit must be capable of avoiding a
VCC voltage drop greater than 400 mV during transmit bursts
Primary (disposable) battery
The characteristics of a primary (non-rechargeable) battery connected to VCC pins should meet the following
requirements:
Maximum pulse and DC discharge current : the non-rechargeable battery with its output circuit must be
capable of delivering 2.5 A current pulses with 1/8 duty-cycle to the VCC pins and must be capable of
delivering a DC current greater than the module maximum average current consumption at the VCC pins.
The maximum pulse and the maximum DC discharge current is not always reported in battery data sheets,
but the maximum DC discharge current is typically almost equal to the battery capacity in Amp-hours
divided by 1 hour
DC series resistance : the non-rechargeable battery with its output circuit must be capable of avoiding a
VCC voltage drop greater than 400 mV during transmit bursts