LISA-C2 series and FW75-C200 - System Integration Manual
UBX-13000620 - R21
Early Production Information
System description
Page 17 of 103
Figure 5 and the components listed in Table 7 show an example of a power supply circuit, where the
VCC
module supply is provided by an LDO linear regulator capable of delivering 1.2 Amps, with proper power
handling capability. The use of a linear regulator is suggested when the difference from the available supply rail
and the VCC value is low: linear regulators provide high efficiency when transforming a 5 V supply to the 3.6 V
typical value of the VCC supply.
5V
C
1
R1
IN
OUT
ADJ
GN
D
1
2
4
5
3
C
2
R2
R3
U
1
SHD
N
u-blox C200
VCC
GND
Figure 5: 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 7: Suggested components for VCC voltage supply application circuit using an LDO linear regulator
1.5.3.3
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 1.2 A 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 250 mV during peak currents (Max Tx Power).
1.5.3.4
Primary (disposable) battery
The characteristics of a primary (non-rechargeable) battery connected to
VCC
pins should meet the following
requirements:
