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AAT4672 Datasheet, PDF (4/24 Pages) Advanced Analogic Technologies – Power Supply Selector Switch
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SmartSwitchTM
PRODUCT DATASHEET
AAT4672
Power Supply Selector Switch
Electrical Characteristics1
VMAIN/AUX = 5V, TA = -40 to +85°C, unless otherwise noted. Typical values are at TA = 25°C.
Symbol
Operation
VMAIN
VAUX
VMAIN-AUX
VUVLO_MAIN
Description
MAIN Operating Voltage Range
AUX Operating Voltage Range
MAIN Switch-Over Threshold (Input Voltage
Difference)
MAIN Under-Voltage Lockout
VUVLO_AUX AUX Under-Voltage Lockout
IMAIN_OP
MAIN Normal Operating Current
IMAIN_SHDN MAIN Shutdown Mode Current
IMAIN_SLP
MAIN Sleep Current
IAUX_OP
AUX Normal Operating Current
IAUX_SHDN AUX Shutdown Mode Current
IAUX_SLP
AUX Sleep Current
Power Switches
RDS(ON) MAIN
RDS(ON) AUX
MAIN-to-OUT FET On-Resistance
AUX-to-OUT FET On-Resistance
OUT Voltage Droop from the Lower Volt-
VDROOP_OUT
age of MAIN and AUX, When Switching Over
Between MAIN and AUX
Current Regulation
tSOFT_START Soft-Start Delay
ILIM_MAIN_range MAIN Current Limit Range
ILIM_AUX_range AUX Current Limit Range
ILIM_MAIN
MAIN Current Limit Accuracy
ILIM_AUX
AUX Current Limit Accuracy
Logic Control / Protection
VIH(EN)
Logic High Threshold
VIL(EN)
Logic Low Threshold
TSHDN
Chip Thermal Shutdown Temperature
Conditions
Min Typ Max
MAIN, AUX > 2.5V
Rising edge
Hysteresis
Rising edge
Hysteresis
VMAIN = 5V, VEN = 0V
VMAIN = VEN = 5V, OUT open
VMAIN = 2.5V, VAUX = 5V, VEN = 0V
VAUX = 5V, VEN = 0V
VAUX = VEN = 5V, OUT open
VMAIN = 5V, VAUX = 2.5V, VEN = 0V
2.5
2.5
VAUX
+ 0.15
VAUX
+ 0.2
0.1
0.1
10
1
10
1
6
6
VAUX
+0.25
2.3
2.3
30
1
5
30
1
5
VMAIN = 5.0V
VMAIN = 3.5V
VAUX = 5.0V
VAUX = 3.5V
IO(OUT) = 0.5A, CO(OUT) = 10µF
0.12
0.14
0.12
0.14
150
Delay of start from EN , or UVLO
100
0.2
2.0
PWRSEL = 5V
0.2
2.0
PWRSEL = 0V
0.04
0.4
RIAUX = 100kΩ
RIMAIN = 100kΩ
PWRSEL = 5V
PWRSEL = 0V
0.8
0.8
0.18
1
1.2
1
1.2
0.2 0.22
Threshold
Hysteresis
1.6
0.4
140
15
Units
V
V
V
V
V
µA
µA
µA
µA
µA
µA
Ω
Ω
mV
µs
A
A
A
A
V
V
°C
1. The output charge voltage accuracy is specified over the 0° to 70°C ambient temperature range; operation over the -25°C to +85°C temperature range is guaranteed by
design.
4
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4672.2008.04.1.0
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