Diodes AP7365 Manuel d'utilisateur télécharger pdf (Page 11)

AP7365

600mA, LOW QUIESCENT CURRENT, FAST TRANSIENT

LOW DROPOUT LINEAR REGULATOR

AP7365

Document number: DS32260 Rev. 3 - 2

11 of 19

www.diodes.com

May 2012

NEW PRODUCT

Application Note

Fast Transient Response

Fast transient response LDO can extend battery life. TDMA-based

cell phone protocols such as Global System for Mobile

Communications (GSM) have a transmit/receive duty factor of

only 12.5 percent, enabling power savings by putting much of the

baseband circuitry into standby mode in between transmit cycles.

In baseband circuits, the load often transitions virtually

instantaneously from 100µA to 100mA. To meet this load

requirement, the LDO must react very quickly without a large

voltage drop or overshoot — a requirement that cannot be met

with conventional, general-purpose LDO.

The AP7365’s fast transient response from 0 to 600mA provides

stable voltage supply for fast DSP and GSM chipset with fast

changing load.

Low Quiescent Current

The AP7365, consuming only around 35µA for all input range,

provides great power saving in portable and low power

applications.

Wide Output Range

The AP7365, with a wide output range of 0.8V to 5.0V, provides a

versatile LDO solution for many portable applications.

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:

= (V

- V

OUT

) X I

OUT

The maximum power dissipation, handled by the device, depends

on the maximum junction to ambient thermal resistance,

maximum ambient temperature, and maximum device junction

temperature, which can be calculated by the equation in the

following:

)

T-C145(

)

@MAX(

°+

Ordering Information

Device Package Code

Packaging

(Note 9)

7”/13” Tape and Reel

Quantity Part Number Suffix

AP7365-XXWG-7 W SOT25 3000/Tape & Reel -7

AP7365-XXSNG-7 SN U-DFN2020-6 3000/Tape & Reel -7

AP7365-XXYG-13 Y SOT89-3L 2500/Tape & Reel -13

AP7365-XXYRG-13 YR SOT89R-3L 2500/Tape & Reel -13

AP7365-XXEG-13 E SOT223-3L 2500/Tape & Reel -13

AP7365-XXERG-13 ER SOT223R-3L 2500/Tape & Reel -13

AP7365-XXEVG-13 EV SOT223V-3L 2500/Tape & Reel -13

Notes: 8. Adjustable version is only available in SOT25 and U-DFN2020-6 package.

9. 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.

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Diodes AP7365 Manuel d'utilisateur Page 11

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