Integration Manual
Table Of Contents
- Preface
- Contents
- 1 System description
- 1.1 Overview
- 1.2 Architecture
- 1.3 Pin-out
- 1.4 Operating modes
- 1.5 Power management
- 1.6 System functions
- 1.7 RF connection
- 1.8 (U)SIM interface
- 1.9 Serial communication
- 1.10 DDC (I2C) interface
- 1.11 Audio Interface
- 1.12 General Purpose Input/Output (GPIO)
- 1.13 Reserved pins (RSVD)
- 1.14 Schematic for LISA-U series module integration
- 1.15 Approvals
- 2 Design-In
- 2.1 Design-in checklist
- 2.2 Design Guidelines for Layout
- 2.2.1 Layout guidelines per pin function
- 2.2.2 Footprint and paste mask
- 2.2.3 Placement
- 2.3 Thermal aspects
- 2.4 Antenna guidelines
- 2.5 ESD precautions
- 3 Features description
- 4 Handling and soldering
- 5 Product Testing
- Appendix
- A Migration to LISA-U2 series wireless modules
- B Glossary
- Related documents
- Revision history
- Contact
LISA-U series - System Integration Manual
3G.G2-HW-10002-A3 Preliminary System description
Page 24 of 160
Reference
Description
Part Number - Manufacturer
C1
10 µF Capacitor Ceramic X7R 5750 15% 50 V
C5750X7R1H106MB - TDK
C2
10 nF Capacitor Ceramic X7R 0402 10% 16 V
GRM155R71C103KA01 - Murata
C3
680 pF Capacitor Ceramic X7R 0402 10% 16 V
GRM155R71H681KA01 - Murata
C4
22 pF Capacitor Ceramic COG 0402 5% 25 V
GRM1555C1H220JZ01 - Murata
C5
10 nF Capacitor Ceramic X7R 0402 10% 16 V
GRM155R71C103KA01 - Murata
C6
470 nF Capacitor Ceramic X7R 0603 10% 25 V
GRM188R71E474KA12 - Murata
C7
22 µF Capacitor Ceramic X5R 1210 10% 25 V
GRM32ER61E226KE15 - Murata
C8
330 µF Capacitor Tantalum D_SIZE 6.3 V 45 mΩ
T520D337M006ATE045 - KEMET
D1
Schottky Diode 40 V 3 A
MBRA340T3G - ON Semiconductor
L1
10 µH Inductor 744066100 30% 3.6 A
744066100 - Wurth Electronics
R1
470 kΩ Resistor 0402 5% 0.1 W
2322-705-87474-L - Yageo
R2
15 kΩ Resistor 0402 5% 0.1 W
2322-705-87153-L - Yageo
R3
22 kΩ Resistor 0402 5% 0.1 W
2322-705-87223-L - Yageo
R4
390 kΩ Resistor 0402 1% 0.063 W
RC0402FR-07390KL - Yageo
R5
100 kΩ Resistor 0402 5% 0.1 W
2322-705-70104-L - Yageo
U1
Step Down Regulator MSOP10 3.5 A 2.4 MHz
LT3972IMSE#PBF - Linear Technology
Table 7: Suggested components for the VCC voltage supply application circuit using a step-down regulator
Low Drop-Out (LDO) linear regulator
The characteristics of the LDO linear regulator connected to the VCC pins should meet the following
requirements:
Power capabilities: the LDO linear regulator with its output circuit must be capable of providing a proper
voltage value to the VCC pins and of delivering 2.5 A current pulses with 1/8 duty cycle
Power dissipation: the power handling capability of the LDO linear regulator must be checked to limit its
junction temperature to the maximum rated operating range (i.e. check the voltage drop from the max input
voltage to the min output voltage to evaluate the power dissipation of the regulator)
Output voltage slope: the use of the soft start function provided by some voltage regulators must be
carefully evaluated, since the voltage at the VCC pins must ramp from 2.5 V to 3.2 V within 1 ms to allow a
proper switch-on of the module
Figure 8 and the components listed in Table 8 show an example of a power supply circuit, where the VCC
module supply is provided by an LDO linear regulator capable of delivering 2.5 A current pulses, 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 3.8 V typical value of the VCC supply.
5V
C1 R1
IN OUT
ADJ
GND
1
2
4
5
3
C2R2
R3
U1
SHDN
LISA-U series
62
VCC
63
VCC
61
VCC
GND
C3
Figure 8: Suggested schematic design for the VCC voltage supply application circuit using an LDO linear regulator