FAN5350 Fairchild Semiconductor, FAN5350 Datasheet - Page 10

• Manufacturer Part Number: FAN5350
• Description: The FAN5350 is a step-down switching voltage regulator that delivers a fixed 1
• Manufacturer: Fairchild Semiconductor

© 2007 Fairchild Semiconductor Corporation
FAN5350 Rev. 1.0.5
Typical Performance Characteristics
V
IN
= 3.6V, T
Figure 18. Power Supply Rejection Ratio in CCM
85dB
5dB
/div
35dB
Figure 16. PMOS Current Limit in Closed Loop
100
Figure 14. Power Efficiency vs. Load Current
1.3
1.2
1.1
1.0
0.9
0.8
0.7
95
90
85
80
75
70
65
60
0.001
-40
1Hz
A
= 25°C, V
-20
Ambient Temperature (°C)
10Hz
0.010
Load Current (A)
EN
0
= V
IN
20
100Hz
, according to the circuit in Figure 1 or Figure 2, unless otherwise specified.
0.100
40
250mA Load
1kHz
1.000
60
V
V
V
IN
IN
IN
=3.6V
=5.5V
=2.7V
V
V
V
V
V
V
V
80
10kHz
IN
IN
IN
IN
IN
IN
IN
=2.5V
=2.7V
=3.3V
=3.6V
=4.2V
=5V
=5.5V
(Continued)
10
Figure 15. Power Efficiency Over Temperature Range
100
95
90
85
80
75
3.0
3.3
3.2
3.1
2.9
2.8
2.7
0.001
Figure 17. Shutdown Supply Current vs.
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
Figure 19. Switching Frequency in CCM
+85°C
+85°C
-40°C
+25°C
Load Current (A)
0.010
Battery Voltage (V)
Battery Voltage (V)
Battery Voltage
+25°C
0.100
+85°C
-40°C
+25°C
www.fairchildsemi.com
-40°C
1.000