AME5258 Datasheet, PDF (13/17 Pages) AMETHERM Circuit Protection Thermistors – 1.5MHz, 600mA Synchronous Buck Converter

AME
AME5258
Oscillator Frequency VS Temperature
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
-50
-25
0
+25 +50 +75
Temperature(^oC)
+100 +125
V_FB vs Temperature
0.615
0.612
0.609
0.606
0.603
0.600
0.597
0.594
0.591
0.588
0.585
-50
-25
0
+25 +50 +75 +100 +125
Temperature(^oC)
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.40
0.35
0.30
0.25
0.20
-50
R_DS(ON) vs Temperature
VIN=4.2V
VIN=3.6V
VIN=2.7V
Main Switch
Synchronous Switch
-25
0
+25 +50 +75 +100 +125
Temperature(^oC)
Rev.A.05
1.5MHz, 600mA
Synchronous Buck Converter
Oscillator Frequency VS Supply Voltage
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
2.5
3.5
4. 5
5.5
Supply Voltage (V)
R_DS(ON) vs Input voltage
0. 7
0. 6
Main Switch
0. 5
0. 4
0. 3
Synchronous
0. 2
Switch
0. 1
0
2. 5
3.5
4. 5
5.5
6. 5
Input Voltage(V)
Efficiency vs Load Current
100
90
80
V IN=2. 7V
70
60
50
V IN=3. 3V
40
V IN =4.2 V
30
V OUT=1 .2 V
20
1
10
100
1000
I_OUT (mA)
13