AAT4670
Dual-Input, Dual-Output Load Switches
General Description
The AAT4670 SmartSwitch鈩?is part of the Analogic
Tech Application Specific Power MOSFET
(ASPM鈩? line of products. The AAT4670 consists
of dual, independent, 1A current limited, slew rate
controlled P-channel MOSFET power switches with
a dedicated source and drain pin assigned to each
switch. The internal circuitry automatically derives
power from the higher of the two input power source
pins with a low operating quiescent current of 18碌A(chǔ).
In shutdown mode, the supply current decreases to
less than 1碌A(chǔ). The switches operate with inputs
ranging from 2.2V to 5.5V, making them ideal for
2.5V, 3V and 5V systems. The dual configuration
permits integration of the load switch function for
systems with two different power busses.
Independent under voltage lockout circuits will shut
down the corresponding switch if its input voltage
falls below the under voltage lockout threshold. If
the die temperature reaches the thermal limit, both
switches thermal cycle off and on indefinitely without
damage until the thermal condition is removed. An
open drain FAULT output signals an over current or
over temperature condition for each channel. Input
logic levels are TTL compatible.
The AAT4670 is available in 8 pin SOP, TSSOP or
MSOP specified over -40 to 85 擄C temperature
range.
Features
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SmartSwitch
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2.2V to 5.5V input voltage range
1A current limit per channel
95m鈩?typical R
DS(ON)
Fast transient response:
鈥?< 1碌s response to short circuit
Low 18碌A(chǔ) quiescent current
1碌A(chǔ) max with Switches off
Slew rate controlled
Thermal shutdown
Fault flags with 3ms blanking
Under voltage lockout
Temp range -40 to 85潞C
8-pin SOP, TSSOP or MSOP packages
Preliminary Information
Applications
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Notebook Computer
PDA, Subnotebook
USB ports
Peripheral ports
Hot swap supplies
Media bay
Typical Application
AAT4670
INA
INB
EN
7
6
1
INA
INB
EN
GND
OUTA
OUTB
FAULTA
FAULTB
8
5
2
3
OUTA
OUTB
FAULTA
FAULTB
C
INA
1碌F
GND
C
INB
1碌F
4
C
OUTA
1碌F
C
OUTB
1碌F
GND
4670.2002.1.0.92
1
AAT4670相關(guān)型號(hào)PDF文件下載
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