AP7363

1.5A, LOW QUIESCENT CURRENT, FAST TRANSIENT

ULTRA-LOW DROPOUT LINEAR REGULATOR

AP7363

Document number: DS35059 Rev. 2 - 2

9 of 14

www.diodes.com

July 2011

© Diodes Incorporated

Application Note (cont.)

Output Noise

This is the integrated value of the output noise over a

specified frequency range. Input voltage and output load

current are kept constant during the measurement.

Results are expressed in

μVrms or μV √Hz.

The AP7362 is a low noise regulator and needs no

external noise reduction capacitor. Output voltage noise

is typically 100

μVrms overall noise level between 100 Hz

and 100 kHz

Noise is specified in two ways:

Output noise density is the RMS sum of all noise

sources, measured at the regulator output, at a specific

frequency (measured with a 1Hz bandwidth). This type of

noise is usually plotted on a curve as a function of

frequency.

Output noise voltage is the RMS sum of spot noise over

a specified bandwidth. Spot noise is measured in units

μV/√Hz or nV/√Hz and total output noise is

measured in

μV(rms). The primary source of noise in

low-dropout regulators is the internal reference.

Power Dissipation

The device power dissipation and proper sizing of the

thermal plane that is connected to the thermal pad is

critical to avoid thermal shutdown and ensure reliable

operation. Power dissipation of the device depends on

input voltage and load conditions and can be calculated

by:

The maximum power dissipation, handled by the device,

depends on the junction to ambient thermal resistance,

and maximum ambient temperature, which can be

calculated by the equation in the following:

JA

R

)

A

T

-

C

150

(

max

_

D

P

θ

°

+

=

Ordering Information

AP 7363 - XX XX - X

Package

Packing

7/13 : Tape & Reel

Blank : ADJ

10 :

12 :

15 :

18 :

25 :

33 :

1.0V

1.2V

1.5V

1.8V

2.5V

3.3V

Output

SP :

HA :

E : SOT223-3L

SO-8EP

U-DFN2030-8

Device

Package Code

Packaging

(Note 7 & 8)

7”/13” Tape and Reel

Quantity

Part Number Suffix

AP7363-XXHA-7

HA

U-DFN2030-8

3000/Tape & Reel

-7

AP7363-XXSP-13

SP

SO-8EP

2500/Tape & Reel

-13

AP7363-XXE-13

E

SOT223-3L

2500/Tape & Reel

-13

Notes:

7. SOT223-3L is only available with fixed output version.

8. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com/datasheets/ap02001.pdf.