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AAT4282A Schematic ( PDF Datasheet ) - Advanced Analogic Technologies

Teilenummer AAT4282A
Beschreibung Dual Slew Rate Controlled Load Switch
Hersteller Advanced Analogic Technologies
Logo Advanced Analogic Technologies Logo 




Gesamt 14 Seiten
AAT4282A Datasheet, Funktion
AAT4282A
Dual Slew Rate Controlled Load Switch
General Description
Features
SmartSwitch
The AAT4282A SmartSwitch™ is a member of
AnalogicTech's Application Specific Power MOS-
FET™ (ASPM™) product family. The AAT4282A is
a dual P-channel MOSFET power switch designed
for high-side load-switching applications. Each
MOSFET has a typical RDS(ON) of 60mΩ, allowing
increased load switch current handling capacity with
a low forward voltage drop. The device is available
in three different versions with flexible turn-on and
turn-off characteristics – from very fast to slew-rate
limited. The standard 4282A (-1) version has a slew-
rate limited turn-on load switch. The AAT4282A (-2)
version features fast turn-on capability, typically less
than 500ns turn-on and 3µs turn-off times. The
AAT4282A (-3) variation offers a shutdown load dis-
charge circuit to rapidly turn off a load circuit when
the switch is disabled. An additional feature is a
slew-rate selector pin which can switch between fast
and slow slew rate.
All the AAT4282A load switch versions are
designed to operate from 1.5V up to 6.5V, making
them ideal for both 3V and 5V systems. Input logic
levels are TTL and 2.5V to 5V CMOS compatible.
The quiescent supply current is a very low 1µA.
The AAT4282A is available in the Pb-free, low pro-
file 2.0x2.0mm FTDFN22-8 package and is speci-
fied over the -40 to 85°C temperature range.
• VIN Range: 1.5V to 6.5V
• Low RDS(ON)
— 60mΩ Typical @ 5V
— 140mΩ Typical @ 1.5V
• Slew Rate Turn-On Time Options
— 1ms
— 0.5µs
— 100µs
• Fast Shutdown Load Discharge Option
• Low Quiescent Current
— Typically 1µA
• TTL/CMOS Input Logic Level
• Temperature Range -40ºC to 85°C
• FTDFN22-8 Package
Applications
www.DataSheet.net/
Cellular Telephones
Digital Still Cameras
Hotswap Supplies
Notebook Computers
PDA Phones
PDAs
PMPs
Smartphones
Typical Application
INA
INB
C1
1μF
INA OUTA
ON/OFF
INB OUTB
ENA AAT4282A
C2
1μF
ON/OFF
FAST/ SLOW
ENB
FAST
GND
N/C
OUTA
OUTB
C3
0.1μF
C4
0.1μF
4282A.2007.09.1.1
1
Datasheet pdf - http://www.DataSheet4U.co.kr/






AAT4282A Datasheet, Funktion
AAT4282A
Dual Slew Rate Controlled Load Switch
Typical Characteristics
VIN = 5V, TA = 25ºC unless otherwise noted.
Output Turn-On Delay Time
(VINA/VENA = 5V; VINB/VENB = 3V; RLA = 10Ω; RLB = 20Ω)
6
ENA
4
2
VOUT
0
ENB
VOUT
4
2
0
Output Turn-On Delay Time
(VINA/VINB/VEN = 5V; RL = 10Ω)
6
ENA
4
2
VOUT
0
ENB
VOUT
6
4
2
0
Time (50µs/div)
Time (50µs/div)
Output Turn-On Delay Time
(VIN = 5V; RL = 10Ω)
6
EN
5
4 VOUT
3
2
1 IIN
1
0.5
00
Output Turn-On Delay Time
(VIN = 3V; RL = 20Ω)
4
www.DataSheet.net/
3
2
1
0
EN
VOUT
IIN
0.4
0.2
0
Time (50µs/div)
7
EN
6
5
4
3
2
1
0
Output Turn-On
(RL = 10Ω)
VOUT (FAST = GND)
VOUT (FAST = VIN)
Time (500µs/div)
6
Time (50µs/div)
Output Turn-On
(VIN = 1.8V; RL = 10Ω)
3.5
3
2.5 VEN
2
1.5
1 VOUT (FAST = GND)
0.5
0 VOUT (FAST = VIN)
-0.5
Time (200µs/div)
4282A.2007.09.1.1
Datasheet pdf - http://www.DataSheet4U.co.kr/

6 Page









AAT4282A pdf, datenblatt
AAT4282A
Dual Slew Rate Controlled Load Switch
Evaluation Board Layout
The AAT4282A evaluation layout follows the print-
ed circuit board layout recommendations and can
be used for good applications layout. Refer to
Figures 1 through 2.
Note: Board layout shown is not to scale.
Figure 1: Evaluation Board Top Side Layout.
www.DataSheet.net/
Figure 2: Evaluation Board Bottom Side Layout.
12
4282A.2007.09.1.1
Datasheet pdf - http://www.DataSheet4U.co.kr/

12 Page





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