AAT2500 Datasheet, PDF (7/26 Pages) Advanced Analogic Technologies – 1MHz Step-Down Converter/LDO Regulator

AAT2500
1MHz Step-Down Converter/LDO Regulator
Typical Characteristics
Unless otherwise noted, V_IN = 5V, T_A = 25°C, V_IN = V_LDO = V_CC = V_P.
LDO Turn-Off Response Time
(C_BYP = 10nF; EN = GND; ENLDO = V_IN)
LDO Turn-On Time From Enable (V_IN present)
(C_BYP = 10nF; EN = GND; ENLDO = V_IN)
V_ENLDO (5V/div)
V_ENLDO = 5V/div
V_OUT (1V/div)
50μs/div
V_OUT = 1V/div
5μs/div
V_IN = 4V
LDO Line Transient Response
(C_BYP = 10nF; EN = GND; ENLDO = V_IN)
6
3.04
5
3.03
V_IN
4
3.02
3
3.01
2
3.00
V_OUT
1
2.99
0
2.98
100μs/div
LDO Load Transient Response 300mA
(C_BYP = 10nF; EN = GND; ENLDO = V_IN)
3.00
800
2.90
700
2.80
V_OUT
600
2.70
500
2.60
400
2.50
300
2.40
200
2.30
I_OUT
100
2.20
0
2.10
-100
10μs/div
LDO Load Transient Response
(C_BYP = 10nF; EN = GND; ENLDO = V_IN)
2.90
500
2.85 _VOUT
400
2.80
300
2.75
200
2.70
100
2.65
2.60
I_OUT
0
-100
100μS/div
LDO Self Noise
(EN = GND; ENLDO = V_IN)
10
1
0.1
0.01 ^{Band Power:}
300Hz to 50kHz = 44.6μVrms
100Hz to 100kHz = 56.3μVrms
0.001
0.01
0.1
1
10
100
Frequency (kHz)
1000 10000
2500.2006.05.1.16
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