A5973AD

Pin settings

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1

Pin settings

1.1

Pin connection

Figure 2.

Pin connection (top view)

1.2

Pin description

Table 1.

Pin description

N

Pin

Description

1

OUT

Regulator output.

2

SYNCH

Master/slave synchronization. When it is open, a signal synchronous

with the turn-off of the internal power is present at the pin. When

connected to an external signal at a frequency higher than the internal

one, then the device is synchronized by the external signal. Connecting

together the SYNC pin of two devices, the one with the higher frequency

works as master and the other one, works as slave.

3INH

A logical signal (active high) disables the device. With IHN higher than

2.2 V the device is OFF and with INH lower than 0.8 V, the device is ON.

If INH is not used the pin must be grounded. When it is open, an internal

pullup disables the device.

4

COMP

E/A output for frequency compensation.

5FB

Feedback input. Connecting directly to this pin results in an output

voltage of 1.235 V. An extenal resistive divider is required for higher

output voltages (the typical value for the resistor connected between this

pin and ground is 4.7 k).

6

VREF

7

GND

Ground.

8

VCC

Unregulated DC input voltage.