AAT2500
1MHz Step-Down Converter/LDO Regulator
Typical Characteristics
Unless otherwise noted, VIN = 5V, TA = 25°C, VIN = VLDO = VCC = VP.
LDO Turn-Off Response Time
(CBYP = 10nF; EN = GND; ENLDO = VIN)
LDO Turn-On Time From Enable (VIN present)
(CBYP = 10nF; EN = GND; ENLDO = VIN)
VENLDO = 5V/div
VENLDO (5V/div)
VOUT (1V/div)
VIN = 4V
VOUT = 1V/div
50μs/div
5μs/div
LDO Line Transient Response
(CBYP = 10nF; EN = GND; ENLDO = VIN)
LDO Load Transient Response
(CBYP = 10nF; EN = GND; ENLDO = VIN)
2.90
2.85
2.80
2.75
2.70
2.65
2.60
500
400
300
200
100
0
6
5
4
3
2
1
0
3.04
3.03
3.02
3.01
3.00
2.99
2.98
VOUT
VIN
VOUT
IOUT
-100
100μS/div
100μs/div
LDO Load Transient Response 300mA
(CBYP = 10nF; EN = GND; ENLDO = VIN)
LDO Self Noise
(EN = GND; ENLDO = VIN)
3.00
800
10
1
2.90
2.80
2.70
2.60
2.50
2.40
2.30
2.20
2.10
700
600
500
400
300
200
100
0
VOUT
0.1
Band Power:
300Hz to 50kHz = 44.6μVrms
100Hz to 100kHz = 56.3μVrms
0.01
IOUT
0.001
0.01
0.1
1
10
100
1000
10000
-100
10μs/div
Frequency (kHz)
2500.2006.05.1.16
7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
