FAN5361 Fairchild Semiconductor, FAN5361 Datasheet - Page 6

• Manufacturer Part Number: FAN5361
• Description: The FAN5361 is a 600mA or 750mA, step-down, switching voltage regulator that delivers a fixed output from an input voltage supply of 2
• Manufacturer: Fairchild Semiconductor

Typical Performance Characteristics
Unless otherwise noted, V
© 2008 Fairchild Semiconductor Corporation
FAN5361 • Rev. 1.1.2
Figure 15. 1.233V
Figure 13. 1.233V
Figure 11. Load Regulation, Auto PFM / PWM and
7
6
5
4
3
2
1
0
0
1.830
1.825
1.820
1.815
1.810
1.805
30
25
20
15
10
FPWM Mode
5
0
0
1
0.1
Auto PWM/PFM
Forced PWM
100
Switching Frequency
OUT
0.2
OUT
I
200
LOAD
Forced PWM
IN
10
Load Current (A)
Effect of t
Load Current (mA)
Peak-to-Peak Output Voltage
= V
Ripple
Output Current (mA)
EN
0.3
300
= 3.6V, V
OFF(MIN)
0.4
400
100
MODE
on Reducing
= 0V (AUTO Mode), V
3.6VIN
5.5VIN
2.5VIN
500
VIN>2.4V
VIN=2.3V
0.5
(Continued)
1,000
600
0.6
6
Figure 12. 1.82V
Figure 14. Effect of t
7
6
5
4
3
2
1
350
300
250
200
150
100
45
40
35
30
25
20
15
10
OUT
50
0
5
0
0
2.5
0
FPWM Mode
= 1.82V, T
Figure 16. PFM / PWM Boundaries
VIN>2.9V
VIN=2.7V
VIN=2.5V
VIN=2.3V
0.1
100
3.0
OUT
A
= 25°C.
Peak-to-Peak Output Voltage Ripple
Always PWM
0.2
The switching mode changes
200
at these borders
3.5
Frequency
OFF(MIN)
Always PFM
Load Current (mA)
Load Current (A)
Input Voltage (V)
300
0.3
4.0
on Reducing Switching
400
0.4
4.5
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500
5.0
3.6VIN
5.5VIN
2.5VIN
0.5
PFM border
PWM border
600
5.5
0.6