Pcb Header Functionality; Sensing Points - Murata Psemi Pe25203 User Manual

PCB Header Functionality

Some extra functions are added to the EVK. Two-way PCB headers are optional to use. Table 4 lists the two-way
PCB headers. To use any of the functions described in Table 4, a jumper should be used to ensure the extra
function is enabled. If the H5 and H6 jumpers are in use, do not fit a jumper socket in H3.
Table 4. Two-way PCB Header Information
Header Signal Name
H5 AUTO Mode
VDD
H6 AUTO Mode EN
H7 LED enable

Sensing Points

Table 5 lists all test points (TPs) found in the PE25203 EVK. Use the TPs to easily monitor the waveforms of
critical signals.
To make accurate measurements of the input and output voltages, use the SO and SI test points included in the
PE25203 EVK.
Table 5. Test Point Descriptions
Test Point
EN
MODE
FF
PG
VDD
FREQ
+SO
-SO
+SI
-SI
EXT VDD
GND
GND1–GND5
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Connects the U2 comparator to the PE25203 VDD pin.
Connects the comparator output to the MODE pin.
LED1 lights ON when the PE25203 allows PGOOD to be pulled high and to indicate that
the charge pump is ready to support the full load current.
Status of the enable signal
Status of the mode signal
Status of the charge pump clock mode (fixed frequency or cycle skip).
Status of the PGOOD signal
V generated by the IC. Typically, 3.6V is generated on this pin.
DD
See the voltage set at this pin.
Positive TP to measure V
OUT
Negative TP to measure V
OUT
Positive TP to measure V
IN
Negative TP to measure V
IN
Positive TP to measure EXT VDD
0V reference TP
0V reference TP
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EVK User's Manual
Function
Description
PE25203
DOC-111189-2 – (02/2025)