1MHz Step-Down Converter/LDO Regulator
Typical Characteristics
Unless otherwise noted, V
IN
= 5V, T
A
= 25°C.
Step-Down Converter
Frequency vs. Input Voltage
(V
OUT
= 1.8V; EN = V
IN
; ENLDO = GND)
1.0
AAT2500
Step-Down Converter
Output Voltage Error vs. Temperature
(V
IN
= 3.6V; V
O
= 1.5V; EN = V
IN
; ENLDO = GND)
2.0
Frequency Variation (%)
Output Error (%)
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
0.5
0.0
-0.5
-1.0
-1.5
-2.0
1.0
0.0
-1.0
-2.0
-40
-20
0
20
40
60
80
100
Input Voltage (V)
Temperature (°C)
°
Step-Down Converter
Switching Frequency vs. Temperature
(V
IN
= 3.6V; V
O
= 1.5V; EN = V
IN
; ENLDO = GND)
0.20
Step-Down Converter
Input Current vs. Input Voltage
(V
O
= 1.8V; EN = V
IN
; ENLDO = GND)
35
Frequency Variation (%)
Input Current (μA)
μ
85°C
30
0.10
25°C
25
0.00
-0.10
20
-0.20
-40
15
-20
0
20
40
60
80
100
-40°C
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
°
Temperature (°C)
Input Voltage (V)
Step-Down Converter
P-Channel R
DS(ON)
vs. Input Voltage
(EN = V
IN
; ENLDO = GND)
750
700
650
750
700
650
Step-Down Converter
N-Channel R
DS(ON)
vs. Input Voltage
(EN = V
IN
; ENLDO = GND)
R
DS(ON)
(mΩ)
Ω
120°C
100°C
120°C
R
DS(ON)
(mΩ)
Ω
600
550
500
450
400
350
300
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
25°C
85°C
600
550
500
450
400
350
300
2.5
3.0
3.5
25°C
85°C
100°C
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
2500.2006.05.1.16
Input Voltage (V)
9
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
