Advanced Analog Technology, Inc.
AAT1204
Recommended operating conditions
5-V main supply input, VCC50
5-V standby supply input, VSB50
3.3V auxiliary supply input, AUX33
Load capacitance, C
L
Load current, I
L
Ambient temperature, T
A
Min
4.5
4.5
3
4.23
0
0
Typ
Max
5.5
5.5
3.6
5.17
400
70
Unit
V
V
V
µF
mA
℃
4.7
Electrical Characteristics over recommended operating free-air temperature, TA = 0℃ to 70
℃,CL
= 4.7µF (unless otherwise noted)
Parameter
VCC50
VSB50
OUT33
△V
O
（△VI）
△V
O
（△IO）
I
50
I
AUX
I
L33
I
LIMIT
T
TSD
T
hys
C
L
I
Ikg REV
）
（
5-V inputs
3.3-V output
Line regulation voltage
Load regulation voltage
Quiescent supply current
Iout33 = 400mA
VSB50 or VCC50 = 4.5V to 5.5V
20 mA＜I
L
＜400
mA
From VCC50 VSB50 terminals,
I
L
= 0 to 400mA
From AUX33 terminal, IL = 0A
Out33 output short to 0v
150
15
4.7
50
4.0
4.25
4.2
4.45
4.4
4.65
0.4
Test Condition
Min
4.5
3.135
Typ
5
3.3
2
40
1.0
1.0
Max Unit
5.5
3.465
V
V
mV
mV
mA
mA
A
℃
μF
μA
V
V
Ω
℃/W
3.0
3.0
1.5
180
Out33 load current
Output current limit
0.4
Thermal shutdown
（NOTE
2）
Thermal hysteresis（
NOTE2
）
Load capacitance
Minimal ESR to insure stability of
regulated output
Reverse leakage output current Tested for input that is grounded.
AUX33, VSB50 or VCC50 = GND,
Out33 = 3.3v
V
LO
Threshold voltage, low
VSB50 or VCC50↓
V
HI
Threshold voltage, high
VSB50 or VCC50↑
VSB50 = VCC50 = 0V,
R
（
SWITCH
）
Auxiliary switch resistance
AUX33 = 3.3V, I
L
= 150mA
R
θJA
Thermal impedance,
Without copper for heat spreading
Junction-to-ambient（NOTE3） With copper for heat spreading
NOTE 2：
Design targets only. Not tested in production.
NOTE 3：Please refer to "Thermal Information"
100
70
–
台灣類比科技股�½有限公司
–
Advanced Analog Technology, Inc
.
V 1.0
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
