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| AAT4644 Datasheet, PDF (1/8 Pages) Advanced Analogic Technologies – 4-Channel Current Limited Load Switch | |||
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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
SmartSwitchâ¢
⢠500mA per channel steady state
⢠4 X 1A current limit trip point
⢠Over-temp protection
⢠Fast transient response:
⢠1µs (typ) response to short circuit
⢠100m⦠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
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