Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

AAT3242ITP-QY-T1 Datasheet(PDF) 11 Page - Advanced Analogic Technologies

Part # AAT3242ITP-QY-T1
Description  300mA/150mA Dual CMOS LDO Linear Regulator
Download  15 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ANALOGICTECH [Advanced Analogic Technologies]
Direct Link  http://www.analogictech.com
Logo ANALOGICTECH - Advanced Analogic Technologies

AAT3242ITP-QY-T1 Datasheet(HTML) 11 Page - Advanced Analogic Technologies

Back Button AAT3242ITP-QY-T1 Datasheet HTML 7Page - Advanced Analogic Technologies AAT3242ITP-QY-T1 Datasheet HTML 8Page - Advanced Analogic Technologies AAT3242ITP-QY-T1 Datasheet HTML 9Page - Advanced Analogic Technologies AAT3242ITP-QY-T1 Datasheet HTML 10Page - Advanced Analogic Technologies AAT3242ITP-QY-T1 Datasheet HTML 11Page - Advanced Analogic Technologies AAT3242ITP-QY-T1 Datasheet HTML 12Page - Advanced Analogic Technologies AAT3242ITP-QY-T1 Datasheet HTML 13Page - Advanced Analogic Technologies AAT3242ITP-QY-T1 Datasheet HTML 14Page - Advanced Analogic Technologies AAT3242ITP-QY-T1 Datasheet HTML 15Page - Advanced Analogic Technologies  
Zoom Inzoom in Zoom Outzoom out
 11 / 15 page
background image
AAT3242
300mA/150mA Dual CMOS LDO Linear Regulator
PowerLinearTM
PRODUCT DATASHEET
3242.2008.08.1.11
11
www .analogictech.com
Short-Circuit Protection
The AAT3242 contains internal short-circuit protection
that will trigger when the output load current exceeds
the internal threshold limit. Under short-circuit condi-
tions, the output of the LDO regulator will be current
limited until the short-circuit condition is removed from
the output or LDO regulator package power dissipation
exceeds the device thermal limit.
Thermal Protection
The AAT3242 has an internal thermal protection circuit
which will turn on when the device die temperature
exceeds 145°C. The LDO regulator output will remain in
a shutdown state until the internal die temperature falls
back below the 145°C trip point. The combination and
interaction between the short-circuit and thermal pro-
tection systems allows the LDO regulators to withstand
indefinite short-circuit conditions without sustaining per-
manent damage.
No-Load Stability
The AAT3242 is designed to maintain output voltage
regulation and stability under operational no-load condi-
tions. This is an important characteristic for applications
where the output current may drop to zero.
Reverse Output-to-Input
Voltage Conditions and Protection
Under normal operating conditions, a parasitic diode
exists between the output and input of the LDO regula-
tor. The input voltage should always remain greater than
the output load voltage maintaining a reverse bias on
the internal parasitic diode. Conditions where VOUT might
exceed VIN should be avoided since this would forward
bias the internal parasitic diode and allow excessive cur-
rent flow into the VOUT pin, possibly damaging the LDO
regulator. In applications where there is a possibility of
VOUT exceeding VIN for brief amounts of time during nor-
mal operation, the use of a larger value CIN capacitor is
highly recommended. A larger value of CIN with respect
to COUT will effect a slower CIN decay rate during shut-
down, thus preventing VOUT from exceeding VIN. In appli-
cations where there is a greater danger of VOUT exceed-
ing VIN for extended periods of time, it is recommended
to place a Schottky diode across VIN to VOUT (connecting
the cathode to VIN and anode to VOUT). The Schottky
diode forward voltage should be less than 0.45V.
Thermal Considerations and
High Output Current Applications
The AAT3242 is designed to deliver continuous output
load currents of 300mA and 150mA under normal oper-
ations, and can supply up to 500mA during circuit start-
up conditions. This is desirable for circuit applications
where there might be a brief high in-rush current during
a power-on event.
The limiting characteristic for the maximum output load
current safe operating area is essentially package power
dissipation and the internal preset thermal limit of the
device. In order to obtain high operating currents, care-
ful device layout and circuit operating conditions need to
be taken into account.
The following discussions will assume the LDO regulator
is mounted on a printed circuit board utilizing the mini-
mum recommended footprint as stated in the layout
considerations section of this document. At any given
ambient temperature (TA), the maximum package power
dissipation can be determined by the following equa-
tion:
P
D(MAX) =
T
J(MAX) - TA
θJA
Constants for the AAT3242 are TJ(MAX) (the maximum
junction temperature for the device, which is 125°C) and
θJA = 110°C/W (the package thermal resistance).
Typically, maximum conditions are calculated at the
maximum operating temperature of TA = 85°C and
under normal ambient conditions where TA = 25°C.
Given TA = 85°C, the maximum package power dissipa-
tion is 364mW. At TA = 25°C, the maximum package
power dissipation is 909mW.
The maximum continuous output current for the AAT3242
is a function of the package power dissipation and the
input-to-output voltage drop across the LDO regulator.
To determine the maximum output current for a given
output voltage, refer to the following equation. This cal-
culation accounts for the total power dissipation of the
LDO regulator, including that caused by ground current.
P
D(MAX) = [(VIN - VOUTA)IOUTA + (VIN x IGND)] + [(VIN - VOUTB)IOUTB + (VIN x IGND)]


Similar Part No. - AAT3242ITP-QY-T1

ManufacturerPart #DatasheetDescription
logo
Advanced Analogic Techn...
AAT3242ITP-QY-T1 ANALOGICTECH-AAT3242ITP-QY-T1 Datasheet
512Kb / 16P
   300mA/150mA Dual CMOS LDO Linear Regulator
logo
Advanced Analog Technol...
AAT3242ITP-QY-T1 AAT-AAT3242ITP-QY-T1 Datasheet
265Kb / 16P
   300mA/150mA Dual CMOS LDO Linear Regulator
More results

Similar Description - AAT3242ITP-QY-T1

ManufacturerPart #DatasheetDescription
logo
Advanced Analogic Techn...
AAT3242 ANALOGICTECH-AAT3242 Datasheet
512Kb / 16P
   300mA/150mA Dual CMOS LDO Linear Regulator
logo
Advanced Analog Technol...
AAT3242 AAT-AAT3242 Datasheet
265Kb / 16P
   300mA/150mA Dual CMOS LDO Linear Regulator
logo
Catalyst Semiconductor
CAT6221 CATALYST-CAT6221 Datasheet
761Kb / 11P
   300mA CMOS Dual LDO Regulator
logo
Advanced Analogic Techn...
AAT3244 ANALOGICTECH-AAT3244 Datasheet
824Kb / 15P
   300mA Adjustable Dual CMOS Low Voltage LDO Linear Regulator
logo
Semtech Corporation
SC563 SEMTECH-SC563 Datasheet
1Mb / 16P
   Dual Output 300mA LDO Linear Regulator
logo
Orister Corporation
RS7206 ORISTER-RS7206 Datasheet
1Mb / 16P
   300mA CMOS LDO Linear Regulator with Enable
logo
List of Unclassifed Man...
FS8853 ETC-FS8853 Datasheet
652Kb / 13P
   300mA LDO Linear Regulator
logo
Catalyst Semiconductor
CAT6217 CATALYST-CAT6217 Datasheet
266Kb / 10P
   150mA CMOS LDO Regulator
logo
Seaward Electronics Inc...
SE5168 SEAWARD-SE5168 Datasheet
215Kb / 8P
   150mA CMOS LDO Regulator
logo
Catalyst Semiconductor
CAT6217 CATALYST-CAT6217_08 Datasheet
274Kb / 10P
   150mA CMOS LDO Regulator
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com