AAT1204 Datasheet, PDF (3/13 Pages) Advanced Analogic Technologies – 400-mA MULTI-INPUT LOW-DROPOUT REGULATOR WITH VAUX SWITCH

Advanced Analog Technology, Inc.
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
AAT1204
Min Typ Max Unit
4.5
5.5
V
4.5
5.5
V
3
3.6
V
4.23 4.7 5.17 µF
0
400 mA
0
70
Electrical Characteristics over recommended operating free-air temperature, TA = 0 to 70
,CL = 4.7µF (unless otherwise noted)
Parameter
Test Condition
Min Typ Max Unit
VCC50 5-V inputs
VSB50
4.5
5
5.5 V
OUT33 3.3-V output
Iout33 = 400mA
3.135
3.3
3.465 V
V_O
Line regulation voltage
V_O
Load regulation voltage
VSB50 or VCC50 = 4.5V to 5.5V
20 mA I_L 400 mA
2
mV
40
mV
I₅₀
Quiescent supply current
From VCC50 VSB50 terminals,
I_L= 0 to 400mA
I_AUX
From AUX33 terminal, IL = 0A
1.0
3.0 mA
1.0
3.0 mA
I_L33
Out33 load current
0.4
I_LIMIT
Output current limit
Out33 output short to 0v
1.5 ^A
T_TSD
Thermal shutdown NOTE 2
150
180
T_hys
Thermal hysteresis NOTE2
15
C_L
Load capacitance
Minimal ESR to insure stability of
regulated output
4.7
F
I_{Ikg REV}
Reverse leakage output current Tested for input that is grounded.
AUX33, VSB50 or VCC50 = GND,
50
A
Out33 = 3.3v
V_LO
Threshold voltage, low
VSB50 or VCC50
4.0
4.2
4.4 V
V_HI
Threshold voltage, high
VSB50 or VCC50
4.25
4.45
4.65 V
R _SWITCH Auxiliary switch resistance VSB50 = VCC50 = 0V,
AUX33 = 3.3V, I_L = 150mA
0.4 _Ω
R_θJA Thermal impedance,
Without copper for heat spreading
100
Junction-to-ambient NOTE3 With copper for heat spreading
70
/W
NOTE 2 Design targets only. Not tested in production.
NOTE 3 Please refer to "Thermal Information"
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Advanced Analog Technology, Inc.
V 1.0