600mA Voltage-Scaling Step-Down Converter
for RF Power Amplifiers with Bypass Switch
Typical Characteristics
Output Voltage vs. Supply Voltage
(LL Mode; V
OUT
= 1.5V)
1.514
1.514
AAT1171
Output Voltage vs. Supply Voltage
(PWM Mode; V
OUT
= 1.5V)
Output Voltage (V)
1.510
1.506
1.502
1.498
Output Voltage (V)
I
OUT
= 50mA
I
OUT
= 300mA
1.510
1.506
1.502
1.498
I
OUT
= 50mA
I
OUT
= 300mA
I
OUT
= 600mA
I
OUT
= 600mA
1.494
2.7 2.9 3.1 3.3 3..5 3.7 3..9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
1.494
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
Supply Voltage (V)
Supply Voltage (V)
Output Voltage vs. Temperature
(V
IN
= 3.6V; V
OUT
= 1.8V; V
DAC
= 0.6V; R
L
= 10)
Output Voltage Error (%)
1.0
0.5
0.0
-0.5
-1.0
-1.5
-40
0.05
Bypass Mode Dropout Voltage
vs. Load Current
Dropout Voltage (V)
0.00
-0.05
-0.10
-0.15
-0.20
-0.25
-0.30
0.1
1
10
100
1000
-15
10
35
60
85
°
Temperature (°C)
Load Current (mA)
Supply Current vs. Supply Voltage
(No Load; LL Mode)
70
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
2.7
Supply Current vs. Supply Voltage
(No Load; PWM Mode)
Supply Current (mA)
Supply Current (µA)
65
60
55
50
45
40
35
30
V
OUT
= 1.8V
V
OUT
= 1.8V
V
OUT
= 0.6V
V
OUT
= 0.6V
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Supply Voltage (V)
Supply Voltage (V)
8
1171.2006.06.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
