Datasheet.kr   

AAT4626IAS-1-B1 데이터시트 PDF




Advanced Analogic Technologies에서 제조한 전자 부품 AAT4626IAS-1-B1은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 AAT4626IAS-1-B1 자료 제공

부품번호 AAT4626IAS-1-B1 기능
기능 USB Dual-Channel Power Switch
제조업체 Advanced Analogic Technologies
로고 Advanced Analogic Technologies 로고


AAT4626IAS-1-B1 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.



전체 14 페이지수

미리보기를 사용할 수 없습니다

AAT4626IAS-1-B1 데이터시트, 핀배열, 회로
General Description
The AAT4626 SmartSwitch™ is part of
AnalogicTech's Application Specific Power
MOSFET™ (ASPM™) product family. It is a dual-
channel 500mA current-limited P-channel MOSFET
power switch designed for high-side load-switching
applications. This switch operates with inputs rang-
ing from 2.7V to 5.5V, making it ideal for both 3V
and 5V systems. An integrated current-limiting cir-
cuit protects the input supply against large changes
in load current which may cause the supply to fall
out of regulation. The AAT4626 is also protected
from thermal overload which limits power dissipa-
tion and junction temperatures. The current limit
threshold is factory programmed at 1.0A, with a
maximum of 1.5A. The quiescent supply current is
typically a low 20µA. In shutdown mode, the supply
current decreases to less than 1µA.
The AAT4626 is available in 8 pin SOP or TSSOP
specified over a -40 to 85°C temperature range.
The AAT4600 Series is a family of adjustable and
fixed SmartSwitch™ products with a range of cur-
rent handling capabilities. Single versions with
adjustable current limit (AAT4601) or fixed current
limit (AAT4625) as well as dual versions with fixed
current limit (AAT4626) are also available.
AAT4626
USB Dual-Channel Power Switch
Features
SmartSwitch
• Compliant to USB 1.1 and 2.0 specifications
• 2.7V to 5.5V Input voltage range
• 500mA (min) continuous current per channel
• 1.25A (max) current limit per channel
• 90mtypical RDS(ON)
• Low quiescent current
• Typically 20µA
• 1µA max with Switches off
• Thermal shutdown
• Slew rate limited turn on
• Fault flag with 2ms blanking
• Undervoltage Lockout
• Temp range -40 to 85°C
• UL Approved—File No. E217765
• 8 pin SOP or TSSOP package
Applications
• USB ports and peripherals
• Notebook computers
• Hot swap supplies
• General purpose power switching
UL Recognized Component
Typical Application
100k
VCC 5.0V
0.1µF
GND
100k
ENA
ENA
1
(ENA)
(ENA)
ENB
ENB
4
(ENB)
(ENB)
AAT4626
6
FLGA 2
FLGB 3
OUTA 8
OUTB 5
47µF
OUTPUTA
OUTPUTB
47µF
GND
4626.2002.1.0.93
1




AAT4626IAS-1-B1 pdf, 반도체, 판매, 대치품
Typical Characteristics
(Unless otherwise noted, VIN = 5V, TA = 25°C)
Quiescent Current vs. Temperature
30
25
20
15
10
5
0
-40
-20
0 20 40 60 80 100 120
Temperature (°C)
Current Limit
1.4
1.2
1
0.8
0.6
0.4
0.2
0
012345
Output (V)
Off-Switch Current vs. Temperature
1.0000
0.1000
(Both switches)
0.0100
0.0010
0.0001
0.0000
-40
-20
0 20 40 60 80
Temperature (°C)
100 120
4
AAT4626
USB Dual-Channel Power Switch
Quiescent Current
25
20 2 channels enabled
15
10
1 channel enabled
5
0
0123456
Input (V)
Off-Supply Current vs. Temperature
1.0000
0.1000
0.0100
0.0010
-40
-20
0 20 40 60 80
Temperature (°C)
100 120
Rdson vs. Temperature
140.0
130.0
120.0
110.0
100.0
90.0
80.0
70.0
60.0
-40
Vin=3V
Vin=5V
-20 0 20 40 60 80
Temperature (°C)
100 120
4626.2002.1.0.93

4페이지










AAT4626IAS-1-B1 전자부품, 판매, 대치품
Applications Information
Operation in Current Limit
If an excessive load is applied to the either output
of an AAT4626, the load current will be limited by
the AAT4626's current limit circuitry. Refer to the
"Current Limit" figure in the typical characteristics
section of this data sheet. If a short circuit were to
occur on the load applied to either the A or B out-
put, there would be a demand for more current
than what is allowed by the internal current limiting
circuit and the voltage at the device output will
drop. This causes the AAT4626 to dissipate more
power than in normal operation, causing the die
temperature to increase. When die temperature
exceeds the internal over temperature threshold,
the AAT4626 will shut down both the A and B out-
put channels. After shutting down, the AAT4626
cools to a level below the over temperature thresh-
old, at which point it will start up again. The
AAT4626 will continue to cycle off and on until one
of the following events occurs; the load current of
the offending output is reduced to a level below the
AAT4626's current limit setting, the input power is
removed, or until the output is turned off by a logic
high level applied to the EN pin of the fault channel.
Thermal Considerations
Since the AAT4626 has internal current limit and
over temperature protection, junction temperature
is rarely a concern. If an application requires a
large load current in a high temperature operating
environment, there is the possibility that the over
temperature protection circuit rather than the cur-
rent limit circuit from one of the two outputs will reg-
ulate the current available to the load. In these
applications, the maximum current available with-
out risk of activation of the over temperature circuit
can be calculated. The maximum internal temper-
ature while current limit is not active can be calcu-
lated using Equation 1.
TJ(MAX) = IMAX2 × RDS(ON)(MAX) × RθJA + TA(MAX)
In Equation 1, IMAX is the maximum current
required by the load. RDS(ON)(MAX) is the maxi-
mum rated RDS(ON) of the AAT4626 at high temper-
ature. RθJA is the thermal resistance between the
device die and the board onto which it is mounted.
TA(MAX) is the maximum ambient temperature for
4626.2002.1.0.93
AAT4626
USB Dual-Channel Power Switch
the printed circuit board assembly under the
AAT4626 when the load switch is not dissipating
power. Equation 1 can be transformed to provide
IMAX; Refer to Equation 2.
IMAX=
TSD(MIN) - TA(MAX)
RDS(ON)(MAX) × RθJA
TSD(MIN) is the minimum temperature required to
activate the device over temperature protection.
The typical thermal limit temperature specification
is 125°C for the AAT4626, for calculations, 115°C is
a safe minimum value to use.
For example, a portable device is specified to oper-
ate in a 50°C environment. The printed circuit board
assembly will operate at temperatures as high as
85°C. This portable device has a sealed case and
the area of the printed board assembly is relatively
small causing RθJA to be approximately 100°C/W.
RDS(ON)(MAX) = 130W. Using Equation 2,
IMAX=
115°C - 85°C
130W × 120°C/W
=
1.4 A
If this system requires less than 1.4 A, the thermal
limit will not activate during normal operation.
Input Capacitor
The input capacitor serves two purposes. First, it
protects the source power supply from transient
current effects generated by the application load cir-
cuits. If a short circuit is suddenly applied to either
output of an AAT4626, there is a microsecond long
period during which a large current can flow before
the current limit circuit becomes active. Refer to the
characteristic curve named "Short Circuit Through
0.3." A properly sized input capacitor can dramat-
ically reduce the load switch input transient
response effects seen by the power supply and
other circuitry upstream from the AAT4626.
The second purpose of the input capacitor is to pre-
vent transient events generated by the load circuits
from effecting the operation of the AAT4626. For
example, if an AAT4626 is used in a circuit that oper-
ates from a 5 volt power supply with poor step load
response, it is possible that turning on the load
switch could cause the input power supply to droop
below the AAT4626's under voltage lockout thresh-
old. This drop in voltage would cause the AAT4626
to turn off until the input power supply voltage levels
7

7페이지


구       성 총 14 페이지수
다운로드[ AAT4626IAS-1-B1.PDF 데이터시트 ]

당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는

포괄적인 데이터시트를 제공합니다.


구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한
광범위한 전력 반도체를 판매합니다.

전력 반도체 전문업체

상호 : 아이지 인터내셔날

사이트 방문 :     [ 홈페이지 ]     [ 블로그 1 ]     [ 블로그 2 ]



관련 데이터시트

부품번호상세설명 및 기능제조사
AAT4626IAS-1-B1

USB Dual-Channel Power Switch

Advanced Analogic Technologies
Advanced Analogic Technologies

DataSheet.kr       |      2020   |     연락처      |     링크모음      |      검색     |      사이트맵