AP7365

600mA, Low Quiescent Current, Fast Transient

Low Dropout Linear Regulator

AP7365

Document number: DS32260 Rev. 1 - 2

12 of 21

www.diodes.com

July 2010

© Diodes Incorporated

Adjustable Operation

The AP7365 provides output voltage from 0.8V to 5.0V through external resistor divider as shown below.

1uF

IN

GN D

EN

OU T

E nable

AD J

R2

R1

1uF

A P 7365

The output voltage is calculated by:

⎟⎟

⎠

⎞

⎜⎜

⎝

⎛

+

=

2

R

1

R

1

REF

V

OUT

V

Rearranging the equation will give the following that is used for adjusting the output to a particular voltage:

⎟⎟

⎠

⎞

⎜⎜

⎝

⎛

−

=

1

REF

V

OUT

V

2

R

1

R

No Load Stability

Other than external resistor divider, no minimum load is required to keep the device stable. The device will remain

stable and regulated in no load condition.

ON/OFF Input Operation

The AP7365 is turned on by setting the EN pin high, and is turned off by pulling it low. If this feature is not used,

the EN pin should be tied to IN pin to keep the regulator output on at all time. To ensure proper operation, the

signal source used to drive the EN pin must be able to swing above and below the specified turn-on/off voltage

Current Limit Protection

When output current at OUT pin is higher than current limit threshold, the current limit protection will be triggered

and clamp the output current to approximately 1.4A to prevent over-current and to protect the regulator from

damage due to overheating.

Short Circuit Protection

When OUT pin is short-circuit to GND, short circuit protection will be triggered and clamp the output current to

approximately 240mA. This feature protects the regulator from over-current and damage due to overheating.