AME
1.5MHz, 600mA
Synchronous Buck Converter
AME5258
Oscillator Frequency VS Supply Voltage
Oscillator Frequency VS Temperature
2.0
2.0
1.9
1.8
1.7
1.9
1.8
1.7
1.6
1.5
1.6
1.5
1.4
1.3
1.4
1.3
1.2
1.2
1.1
-50
-25
0
+25
+50
+75
+100
+125
2.5
3.5
4.5
5.5
Temperature(oC)
Supply Voltage (V)
VFB vs Temperature
RDS(ON) vs Input voltage
0.615
0.612
0.609
0.606
0.603
0.600
0.7
0.6
Main Switch
0.5
0.4
0.3
0.2
0.597
0.594
Synchronous
Switch
0.591
0.588
0.585
0.1
0
-50
-25
0
+25
+50
+75
+100
+125
2.5
3.5
4.5
5.5
6.5
Temperature(oC)
Input Voltage(V)
RDS(ON) vs Temperature
Efficiency vs Load Current
0.80
0.75
100
90
80
V
IN=2.7V
0.70
0.65
0.60
0.55
0.50
0.45
0.40
0.35
0.30
0.25
0.20
V =3.6V
IN
V =4.2V
VIN =2.7V
IN
70
60
50
VIN =3.3V
VIN =4.2V
40
30
Main Switch
Synchronous Switch
VOUT=1.2V
20
-50
-25
0
+25
+50
+75
+100
+125
1
10
100
1000
Temperature(oC)
IOUT (mA)
Rev.A.05
13
AMETHERM [ AMETHERM CIRCUIT PROTECTION THERMISTORS ]
