Ap7365, Ordering information – Diodes AP7365 User Manual
Page 11
AP7365
600mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7365
Document number: DS32260 Rev. 3 - 2
11 of 19
May 2012
© Diodes Incorporated
NEW PROD
UC
T
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:
P
D
= (V
IN
- 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:
JA
R
)
A
T
-
C
145
(
)
T A
@
MAX
(
PD
θ
°
+
=
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