AAT4670 Datasheet, PDF (1/12 Pages) Advanced Analogic Technologies – Dual-Input, Dual-Output Load Switches

AAT4670
Dual-Input, Dual-Output Load Switches
General Description
The AAT4670 SmartSwitch™ is part of the Analogic
Tech Application Specific Power MOSFET
(ASPM™) 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 18µA.
In shutdown mode, the supply current decreases to
less than 1µA. 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 °C temperature
range.
Features
SmartSwitch^™
• 2.2V to 5.5V input voltage range
• 1A current limit per channel
• 95mΩ typical R_DS(ON)
• Fast transient response:
• < 1µs response to short circuit
• Low 18µA quiescent current
• 1µA max with Switches off
• Slew rate controlled
• Thermal shutdown
• Fault flags with 3ms blanking
• Under voltage lockout
• Temp range -40 to 85ºC
• 8-pin SOP, TSSOP or MSOP packages
Applications
• Notebook Computer
• PDA, Subnotebook
• USB ports
• Peripheral ports
• Hot swap supplies
• Media bay
Typical Application
INA
INB
C_INA
1µF
GND
EN
C_INB
1µF
7 _INA
6 _INB
1 _EN
AAT4670
GND
OUTA ⁸
OUTB ⁵
FAULTA ²
3
FAULTB
4
FAULTA
FAULTB
C_OUTA
1µF
OUTA
OUTB
C_OUTB
1µF
GND
4670.2002.1.0.92
1