NCP392A

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3

PIN FUNCTION DESCRIPTION

/EN

OUT

OUT

PGND

VBUS

_D

OUT

IN

PGND

OVLO

IN

IN

PGND

A

B

C

123

4

(Top View)

Figure 3. Pinout

Table 1. NCP392 PIN DESCRIPTION

Pin

Pin

Name

Type

Description

A1

EN

I/O

Enable pin bar.

The device enters in shutdown mode when this pin is tied to a high level. In this case the output is

disconnected from the input.

To allow normal functionality, the EN pin is tied low with internal pull down.

This pin does not have an impact on the VBUS_DET.

A2,

A3,

B2

OUT

OUTPUT

Output voltage pins.

These pins follow IN pins, with debounce time, when “no fault” are detected.

The outputs are disconnected from the Vin power supply when the input voltage is below UVLO,

above OVLO threshold or internal thermal protection is exceeded.

The three OUT pins must be hardwired together and used for power dissipation.

A4,

B4,

C4

PGND

POWER

Ground. The three GND pins must be hardwired together and connect to the system GND.

B1

VBUS_D

ET

OUTPUT

Vbus detect pin. This pin reflects Vin pin, and be in pass through mode up to regulation level. Upper

this trip, this output regulates IN voltage whatever OVLO event or /EN setting.

B3,

C2,

C3

IN

POWER

Input voltage pins.

These pins are connected to the power supply.

The three IN pins must be hardwired together.

C1

OVLO

INPUT

External OVLO Adjustment. Connect external resistor bridge to OVLO pin to select a different OVLO

threshold. Connect OVLO pin to GND if not used. In this case internal OVLO will be selected.