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PDF AAT4644IAS-B1 Data sheet ( Hoja de datos )
| Número de pieza | AAT4644IAS-B1 | |
| Descripción | 4-Channel Current Limited Load Switch | |
| Fabricantes | Advanced Analogic Technologies | |
| Logotipo |  |
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AAT4644
4-Channel Current Limited Load Switch
General Description
The AAT4644 is a four-channel resettable fuse. It
utilizes independent current-limited and thermally
protected P-channel MOSFETs to protect against
short circuits. Each switch's current limit is factory
programmed at 1A. Additional protection is provid-
ed with undervoltage lockout; the switches are
turned off when the input voltage drops below a
preset level. The quiescent supply current is typi-
cally 20µA. The AAT4644 is a flexible solution,
allowing system designers to gang outputs togeth-
er for lower RDS(ON) and higher current limit.
The AAT4644 is available in 8 pin TSSOP or SOP
packages, specified over -40 to 85°C.
Features
SmartSwitch™
• 500mA per channel steady state
• 4 X 1A current limit trip point
• Over-temp protection
• Fast transient response:
• 1µs (typ) response to short circuit
• 100mΩ typical RDS(ON)
• Undervoltage Lockout
• Temp range -40 to 85°C
• 8 pin TSSOP or SOP packages
Applications
• USB ports
• Peripheral ports
• Desktop PCs
Typical Application
INPUT
3.3V - 5V
2,7
IN
1
OUT1
3
AAT4644 OUT2
8
OUT3
GND
6
OUT4
4
OUTPUT1
OUTPUT2
OUTPUT3
OUTPUT4
4644.2002.01.0.92
1
1 page  
AAT4644
4-Channel Current Limited Load Switch
(TA = 25°C unless otherwise noted)
Rdson vs. Temperature
150.0
140.0
130.0
120.0
110.0
100.0
90.0
80.0
70.0
-40
VIN=3V
VIN=5V
-20 0 20 40 60 80
Temperature (°C)
100 120
Block Diagram
IN
Undervoltage
Lockout
Channel 1 Control
Current Limit, Over-temp
Channel 2 Control
Current Limit, Over-temp
Channel 3 Control
Current Limit, Over-temp
Channel 4 Control
Current Limit, Over-temp
GND
OUT1
OUT2
OUT3
OUT4
4644.2002.01.0.92
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet AAT4644IAS-B1.PDF ] | |
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