Enpirion
®
Power Evaluation Board User Guide
EN5322Q PowerSoC
QUICK START GUIDE
1. Preset Power Supply to 2.4 V ≤ V
IN
≤ 5.5 V.
2. Turn Power Supply off.
3. Place jumper ENABLE at the left position to enable the EN5322. Placing jumper ENA at the
right position will disable the EN5322.
4. Place jumper POK at the left position to connect pull up resistor R4 to VIN. Left the jumper
open if the POK function is not used.
5. Place jumpers VS0, VS1, and VS2 according to the following table to set the desired output
voltage.
Table 2: VID Code Setting
VS2 VS1 VS0 Output Voltage
The output voltage can also be set with an external resistor divider.
Use a 340 kΩ, 1 % resistor for R1.
Then the value of the
bottom resistor R2 is given as:
Ω
−
= k
V
R
OUT
6.0
204
2
where V
OUT
is the output voltage. For example, if the
desired output voltage is 1 V, R2 should be a 511 kΩ,
1% resistor.
6. Connect input power supply terminals to +VIN (TP8)
and GND (TP5).
7. Connect load terminals to +VOUT (TP7) and GND (TP6).
8. Turn on the Power Supply after making connections.
9. The EN5322 will be enabled. The POK output can be
observed at TP9. To observe noise-sensitive waveforms
on input / output ripple and NC(SW), use the measurement
technique as shown in Figure 5. Wrap bus wire around
the GND portion of the bare probe and bring it close to
the probe tip. Then solder the bus wire to the nearest
GND on the board.
Impedance Scope Probe
for Noise Measurements
4
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