Ublox LISA-U100, Integration Manual

Page: 27 / 190

LISA-U series - System Integration Manual
UBX-13001118 - R17 Advance information System description
Page 27 of 190
5V
C1 R1
IN OUT
ADJ
GND
1
2 4
5
3
C2 R2
R3
U1
SHDN
LISA-U series
62 VCC
63
VCC
61
VCC
GND
C3
Figure 9: Suggested schematic design for the VCC voltage supply application circuit using an LDO linear regulator
Reference Description Part Number - Manufacturer
C1, C2 10 µF Capacitor Ceramic X5R 0603 20% 6.3 V GRM188R60J106ME47 - Murata
C3 330 µF Capacitor Tantalum D_SIZE 6.3 V 45 m Ω T520D337M006ATE045 - KEMET
R1 47 k Ω Resistor 0402 5% 0.1 W RC0402JR-0747KL - Yageo Phycomp
R2 9.1 k Ω Resistor 0402 5% 0.1 W RC0402JR-079K1L - Yageo Phycomp
R3 3.9 k Ω Resistor 0402 5% 0.1 W RC0402JR-073K9L - Yageo Phycomp
U1 LDO Linear Regulator ADJ 3.0 A LT1764AEQ#PBF - Linear Technology
Table 10: Suggested components for VCC voltage supply application circuit using an LDO linear regulator
Rechargeable Li-Ion or Li-Pol battery
Rechargeable Li-Ion or Li-Pol 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