Datasheet
Pin description and connection diagrams PM8903A
6/33 Doc ID 024147 Rev 1
9COMP
Error amplifier output.
Connect with an (R
F
- C
F
) // C
P
to FB. See
Figure 1
The device cannot be disabled by pulling low this pin.
10 FB
Error amplifier inverting input.
Connect with R
FB
or R
FB
// (R
S
- C
S
) to VSEN and with an (R
F
- C
F
) // C
P
to
COMP. A resistor R
OS
to GND sets the output voltage ratio. See
Figure 1
11 GND
All the internal references are referred to this pin. Connect to the PCB Signal
Ground.
12 VCC
Device power supply.
Operative voltage is 2.9 V - 5.5 V. Filter with at least 1 µF MLCC vs. GND.
13, 14 VIN
Power input voltage, connected to embedded high-side drain.
Supply range is from 2.8 V to 6 V. Bypass VIN pins to PGND pins close to the
IC package with high quality MLCC capacitors (at least 10 µF). See
Figure 1
.
15, 16 PGND
Power ground connection, connected to embedded low-side MOSFET source.
Connect to PGND PCB plane. See
Figure 1
.
Thermal pad
Thermal pad connects the silicon substrate and makes good thermal contact
with the PCB. Connect to the PCB PGND plane.
Table 2. Pin description (continued)
Pin # Name Function