u-blox LARA-R2 series System Integration Manual page 70

Figure 29 and the components listed in Table 22 show an example of a low cost power supply circuit, where the
VCC module supply is provided by an LDO linear regulator capable of delivering the specified highest peak /
pulse current, with proper power handling capability. The regulator described in this example supports a limited
input voltage range and it includes internal circuitry for current and thermal protection.
It is recommended to configure the LDO linear regulator to generate a voltage supply value slightly below the
maximum limit of the module VCC normal operating range (e.g. ~4.1 V as in the circuit described in Figure 29
and Table 22). This reduces the power on the linear regulator and improves the whole thermal design of the
supply circuit.
5V
2
IN
U1
C1
1
EN
GND
Figure 29: Example of low cost VCC supply application circuit using an LDO linear regulator
Reference Description
C1, C2 10 µF Capacitor Ceramic X5R 0603 20% 6.3 V
R1
27 k Resistor 0402 5% 0.1 W
R2
4.7 k Resistor 0402 5% 0.1 W
U1 LDO Linear Regulator ADJ 3.0 A
Table 22: Components for low cost VCC supply application circuit using an LDO linear regulator
UBX-16010573 - R02
4
OUT
R1 C2
5
ADJ
R2
3
Objective Specification
LARA-R2 series - System Integration Manual
LARA-R2 series
VCC
51
VCC
52
VCC
53
GND
Part Number - Manufacturer
GRM188R60J106ME47 - Murata
RC0402JR-0727KL - Yageo Phycomp
RC0402JR-074K7L - Yageo Phycomp
LP38501ATJ-ADJ/NOPB - Texas Instrument
Design-in
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