NXP Semiconductors
AN11744
PN5180 Evaluation board quick start guide
AN11744 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2018. All rights reserved.
Application note Rev. 1.3 — 2 February 2018
COMPANY PUBLIC 371213 8 / 45
1. USB supply, external supply & and LPC1769 supply
Figure 5. Power supply
As soon as the board is supplied with power, the red LED LD100 must be on.
The PN5180 evaluation board provides two LDOs, one for 5V and one for 3.3V. 5V LDO
is only be used, if the external power supply is connected and used (J101 default).
Three jumpers can be used to evaluate the different power supply options:
J101: either external or USB power supply (default)
J303: either VBAT = 5V or 3.3V (default)
J300: closed (default) or to measure the ITVDD
2.2.3 PN5180
The PN5180 is shown in Fig 6.
The default clock is based on a 27.12 MHz crystal, but the board supports external clock
input, if needed.
During the antenna tuning and overall hardware design typically the ITVDD must be
checked. This can be done with the JP300 (“TVDD”), either using an external power
supply or just using an ampere meter instead of the jumper.
The relevant test signals can be derived from the test pins at the bottom of the board.
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