NXP Semiconductors PCA9617ADP-ARD, Руководство пользователя, Страница: 11 / 25

NXP Semiconductors
UM11763
PCA9617ADP-ARD user manual
Figure 3. PCA9617ADP-ARD – LDO1 (up) and LDO2 (down) section
The enable input for both LDOs (U3 and U4) are controlled through an interlock
loop circuit. Both regulators are disabled when “LDO_EN” are pulled down. This is
accomplished when LDO1 switch (U1) is “2Z/2Y3 – ON” and LDO2 switch (U2) is
“2Z/2Y0 – ON”. This combination is true for VCCA = 4.96 V, and VCCB = 2.5 V. The
onboard LED D3 indicates the LDO enable status.
4.7 Jumpers and test points
The board contains eight jumpers and several test points. Table 4 and Figure 4 detail
the jumper locations and their default configurations. Table 5 describes the test points
located on the PCA9617ADP-ARD board.
Ref Des Label Default Description
1-2: VCCA = VCC_LDOOUT1
J19 VCCA 1-2
OFF: VCCA FROM EXTERNAL
1-2: VCCB = VCC_LDOOUT2
J20 VCCB 1-2
OFF: VCCB FROM EXTERNAL
1-2/3-4: ON
J18 Side A (U6) 1-2/3-4: ON
1-2/3-4: OFF
Table 4. PCA9617ADP-ARD jumpers
UM11763 All information provided in this document is subject to legal disclaimers. © 2022 NXP B.V. All rights reserved.
User manual Rev. 1.0 — 22 July 2022
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