PM8903A demonstration board

PM8903A

28/33

Doc ID 024147 Rev 1

7.1.1

Connect a power supply to connectors J4(VIN) and J5(GND) on the demonstration board to

provide voltage on the power input pins of both devices. Input voltage can range from 2.8 V

to 6 V bus.

If the voltage is between 2.9 V and 5.5 V, it can also supply the signal input pins of both

mounted) and mount 0

Ω resistors on R1/R19 locations.

7.1.2

pins.

Connect a power supply to connector J2 (pin one is VC and pin two is GND) on the

demonstration board to provide voltage on the signal input pins of both devices. Supply

voltage can range from 2.9 V to 5.5 V.

7.1.3

On the standard demonstration board, the output voltage is programmed to be 1.5 V, but it

can be easily changed mounting one of the values suggested in

Table 9.

custom value for the output voltage of each device.

where:

●

●

●

device U1 and R32/R33 for device U2) and has a total value of 3.3 k

Ω.

Table 9.

Programmed output voltage

Resistor value

0.6 V

NM

0.8 V

10 k

Ω

1.0 V

4.9 k

Ω

1.2 V

3.3 k

Ω

1.5 V

2.2 k

Ω

1.8 V

1.65 k

Ω

2.5 V

1 k

Ω

R

OS

R

FB

V

REF

V

OUT

V

REF

–

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⋅

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