PS22921

Plessey Semiconductors Ltd, Tamerton Road, Roborough, Plymouth, UK PL6 7BQ

Data Sheet 292203 issue 1

Tel: +44 (0)1752 693000

Fax: +44 (0)1752 693200

email: sales@plesseysemi.com; October 12, 2010

2

Pin Description

Symbol

Pin #

SOT23-5

Description

EN

3

Enable pin. It controls the electrical on/off of the device. When connected to

logic low, the device shuts off and consumes less than 1µA of current. Logic

high will resume normal operation.

ByPass

4

Bypass pin. Connect an external capacitor from BYP to ground to bypass the

noise generated by the internal bandgap. This improves power supply rejection

ratio and output noise. A minimum capacitor of 220pF is recommended.

1

Input supply pin. Connect a 10µF capacitor between this pin and ground.

NC

N/A

No connect.

FB

N/A

Feedback Voltage. A resistor network of two resistors is used to set-up the

resistors is connected to FB pin. For fixed voltage options, the resistors are

5

Regulated output Voltage. Connect a 10µF capacitor from this pin to ground.

PG

N/A

Power good. It is an open collector, active high output that indicates the status

the PG pin goes in to a high impedance state. When the device is out of

regulation or shutdown, the PG pin is pulled low. A 10K

to 1M

resistor

GND

2

Ground connection.

N/A

Expose pad. Connected to PCB ground plane for good thermal dissipation.

NB: N/A = Not available in the shown package type

Pin Configuration