FAN5308 Datasheet, PDF (5/11 Pages) Fairchild Semiconductor – 800mA High-Efficiency Step-Down DC-DC Converter

Typical Performance Characteristics
T_A = 25°C, C_IN = 10µF, C_OUT = 20µF, L = 3.3µH, R₂ = 10KΩ, unless otherwise noted.
Efficiency vs. Load Current
100
95
90
85
80
V_IN = 3.6V
75
V_OUT = 3V
70
V_IN = 5V
V_OUT = 3.3V
V_IN = 3.6V
V_OUT = 1.2V
65
60
1
10
100
1000
Load Current (mA)
Efficiency vs. Load Current
100
95
90
85
80
75
70
65
60
55
V_IN = 5.5V
50
45
40
35
0.1
1
V_IN = 3.9V
10
V_OUT = 3.3V
R ₂ = 100KΩ
100
Load Current (mA)
1000
Efficiency vs. Load Current
100
V_OUT = 1.2V
90
R ₂ = 100KΩ
80
70
60
V_IN = 2.5V
50
40
V _IN = 3. 6V
V_IN = 5.5V
30
0.1
1
10
100
Load Current (mA)
1000
Quiescent Current vs. Input Voltage
80
70 ^{VOUT = 1. 2V}
60
50
40
R ₂ = 10KΩ
30
20
10
R ₂ = 100KΩ
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
1.214
1.212
1.210
1.208
1.206
1.204
1.202
1.200
1.198
1.196
1.194
1.192
0
Output Voltage vs. Load Current
V_IN = 5V
200
400
600
800
Load Current (mA)
1000
Frequency vs. Temperature
1400
1380
1360
1340
1320
1300
1280
1260
1240
1220
1200
-40 -20
V_IN = 5.5V
V_IN = 3.6V
V_IN = 2.5V
0
20
40
60
Temperature (°C)
80 100
FAN5308 Rev. 1.0.1
5
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